ref: f4f62dc315d57fb6204c6967ffd56a4fab65761d
dir: /Engine/src/engine.c/
/*
* "Build Engine & Tools" Copyright (c) 1993-1997 Ken Silverman
* Ken Silverman's official web site: "http://www.advsys.net/ken"
* See the included license file "BUILDLIC.TXT" for license info.
* This file has been modified from Ken Silverman's original release
*/
/* SUPERBUILD define is in engine.h ... */
#define ENGINE
/* set this to something non-zero to get loadtile() debugging info on stderr. */
#define BUILD_CACHEDEBUG 0
#include <string.h>
#include <math.h>
#include <stdio.h>
#include <stdlib.h>
#include <fcntl.h>
#include <sys/types.h>
#include <sys/stat.h>
#if (defined USE_OPENGL)
#include "buildgl.h"
#endif
#include "pragmas.h"
#include "platform.h"
#if !PLATFORM_MACOSX
#include <malloc.h>
#endif
#include "build.h"
#include "cache1d.h"
#include "engine.h"
int32_t stereowidth = 23040, stereopixelwidth = 28, ostereopixelwidth = -1;
volatile int32_t stereomode = 0, visualpage, activepage, whiteband, blackband;
volatile uint8_t oa1, o3c2, ortca, ortcb, overtbits, laststereoint;
#include "display.h"
#define MAXCLIPNUM 512
#define MAXPERMS 512
#define MAXTILEFILES 256
#define MAXYSAVES ((MAXXDIM*MAXSPRITES)>>7)
#define MAXNODESPERLINE 42 /* Warning: This depends on MAXYSAVES & MAXYDIM! */
#define MAXWALLSB 2048
#define MAXCLIPDIST 1024
/* used to be static. --ryan. */
uint8_t moustat = 0;
int32_t transarea = 0, totalarea = 0, beforedrawrooms = 1;
/* used to be static. --ryan. */
int32_t oxdimen = -1, oviewingrange = -1, oxyaspect = -1;
/* used to be static. --ryan. */
int32_t curbrightness = 0;
/* Textured Map variables */
static uint8_t globalpolytype;
static short *dotp1[MAXYDIM], *dotp2[MAXYDIM];
static char tempbuf[MAXWALLS];
int32_t ebpbak, espbak;
int32_t slopalookup[16384];
/*
* !!! used to be static. If we ever put the original setgamemode() back, this
* !!! can be made static again. --ryan.
*/
uint8_t permanentlock = 255;
int32_t artversion, mapversion;
uint8_t *pic = NULL;
uint8_t picsiz[MAXTILES], tilefilenum[MAXTILES];
int32_t lastageclock;
int32_t tilefileoffs[MAXTILES];
int32_t artsize = 0, cachesize = 0;
static short radarang[1280], radarang2[MAXXDIM+1];
static unsigned short sqrtable[4096], shlookup[4096+256];
uint8_t pow2char[8] = {1,2,4,8,16,32,64,-128};
int32_t pow2long[32] =
{
1L,2L,4L,8L,
16L,32L,64L,128L,
256L,512L,1024L,2048L,
4096L,8192L,16384L,32768L,
65536L,131072L,262144L,524288L,
1048576L,2097152L,4194304L,8388608L,
16777216L,33554432L,67108864L,134217728L,
268435456L,536870912L,1073741824L,2147483647L,
};
int32_t reciptable[2048], fpuasm;
char kensmessage[128];
/* rcg02132001 Cygwin support. */
#if (defined C_IDENTIFIERS_UNDERSCORED)
#define SYM_sqrtable "_sqrtable"
#define SYM_walock "_walock"
#define SYM_shlookup "_shlookup"
#define SYM_pow2char "_pow2char"
#define SYM_gotpic "_gotpic"
#define SYM_dmval "_dmval"
#else
#define SYM_sqrtable "sqrtable"
#define SYM_walock "walock"
#define SYM_shlookup "shlookup"
#define SYM_pow2char "pow2char"
#define SYM_gotpic "gotpic"
#define SYM_dmval "dmval"
#endif
uint8_t britable[16][64];
uint8_t textfont[1024], smalltextfont[1024];
//xb1 and xb2 seems to be storing the column of the wall endpoint
//yb1 and yb2 store the Y distance from the camera.
static int32_t xb1[MAXWALLSB], yb1[MAXWALLSB], xb2[MAXWALLSB], yb2[MAXWALLSB];
//rx1,rx2,ry1,ry2 stores the cameraspace wall endpoints coordinates.
static int32_t rx1[MAXWALLSB], ry1[MAXWALLSB], rx2[MAXWALLSB], ry2[MAXWALLSB];
//
static short p2[MAXWALLSB], thesector[MAXWALLSB], thewall[MAXWALLSB];
static short bunchfirst[MAXWALLSB], bunchlast[MAXWALLSB];
static short smost[MAXYSAVES], smostcnt;
static short smoststart[MAXWALLSB];
static uint8_t smostwalltype[MAXWALLSB];
static int32_t smostwall[MAXWALLSB], smostwallcnt = -1L;
static short maskwall[MAXWALLSB], maskwallcnt;
static int32_t spritesx[MAXSPRITESONSCREEN];
static int32_t spritesy[MAXSPRITESONSCREEN+1];
static int32_t spritesz[MAXSPRITESONSCREEN];
static spritetype *tspriteptr[MAXSPRITESONSCREEN];
//FCS: (up-most pixel on column x that can still be drawn to)
short umost[MAXXDIM+1];
//FCS: (down-most pixel +1 on column x that can still be drawn to)
short dmost[MAXXDIM+1];
static short bakumost[MAXXDIM+1], bakdmost[MAXXDIM+1];
short uplc[MAXXDIM+1], dplc[MAXXDIM+1];
static short uwall[MAXXDIM+1], dwall[MAXXDIM+1];
static int32_t swplc[MAXXDIM+1], lplc[MAXXDIM+1];
static int32_t swall[MAXXDIM+1], lwall[MAXXDIM+4];
int32_t xdimen = -1, xdimenrecip, halfxdimen, xdimenscale, xdimscale;
int32_t wx1, wy1, wx2, wy2, ydimen;
int32_t viewoffset;
static int32_t rxi[8], ryi[8], rzi[8], rxi2[8], ryi2[8], rzi2[8];
static int32_t xsi[8], ysi[8];
/* used to be static. --ryan. */
int32_t *horizlookup=0, *horizlookup2=0, horizycent;
int32_t globalposx, globalposy, globalposz, globalhoriz;
short globalang, globalcursectnum;
int32_t globalpal, cosglobalang, singlobalang;
int32_t cosviewingrangeglobalang, sinviewingrangeglobalang;
uint8_t *globalpalwritten;
int32_t globaluclip, globaldclip, globvis = 0;
int32_t globalvisibility, globalhisibility, globalpisibility, globalcisibility;
uint8_t globparaceilclip, globparaflorclip;
int32_t xyaspect, viewingrangerecip;
int32_t asm1, asm2, asm3, asm4;
int32_t vplce[4], vince[4], palookupoffse[4], bufplce[4];
uint8_t globalxshift, globalyshift;
int32_t globalxpanning, globalypanning, globalshade;
short globalpicnum, globalshiftval;
int32_t globalzd, globalbufplc, globalyscale, globalorientation;
int32_t globalx1, globaly1, globalx2, globaly2, globalx3, globaly3, globalzx;
int32_t globalx, globaly, globalz;
//Those two variables are using during portal flooding:
// sectorBorder is the stack and sectorbordercnt is the stack counter.
static short sectorborder[256], sectorbordercnt;
static uint8_t tablesloaded = 0;
int32_t pageoffset, ydim16, qsetmode = 0;
int32_t startposx, startposy, startposz;
short startang, startsectnum;
short pointhighlight, linehighlight, highlightcnt;
static int32_t lastx[MAXYDIM];
uint8_t *transluc = NULL, paletteloaded = 0;
#define FASTPALGRIDSIZ 8
static int32_t rdist[129], gdist[129], bdist[129];
static uint8_t colhere[((FASTPALGRIDSIZ+2)*(FASTPALGRIDSIZ+2)*(FASTPALGRIDSIZ+2))>>3];
static uint8_t colhead[(FASTPALGRIDSIZ+2)*(FASTPALGRIDSIZ+2)*(FASTPALGRIDSIZ+2)];
static int32_t colnext[256];
static uint8_t coldist[8] = {0,1,2,3,4,3,2,1};
static int32_t colscan[27];
static short clipnum, hitwalls[4];
int32_t hitscangoalx = (1<<29)-1, hitscangoaly = (1<<29)-1;
typedef struct {
int32_t x1, y1, x2, y2;
} linetype;
static linetype clipit[MAXCLIPNUM];
static short clipsectorlist[MAXCLIPNUM], clipsectnum;
static short clipobjectval[MAXCLIPNUM];
typedef struct
{
int32_t sx, sy, z;
short a, picnum;
int8_t dashade;
uint8_t dapalnum, dastat, pagesleft;
int32_t cx1, cy1, cx2, cy2;
} permfifotype;
static permfifotype permfifo[MAXPERMS];
static int32_t permhead = 0, permtail = 0;
short numscans, numhits, numbunches;
short editstatus = 0;
short searchit;
int32_t searchx = -1, searchy; /* search input */
short searchsector, searchwall, searchstat; /* search output */
static char artfilename[20];
static int32_t numtilefiles, artfil = -1, artfilnum, artfilplc;
static uint8_t inpreparemirror = 0;
static int32_t mirrorsx1, mirrorsy1, mirrorsx2, mirrorsy2;
int32_t totalclocklock;
unsigned short mapCRC;
#include "a.h"
static __inline int32_t nsqrtasm(uint32_t param)
{
unsigned short *shlookup_a = (unsigned short*)shlookup;
unsigned short *sqrtable_a = (unsigned short*)sqrtable;
unsigned short cx;
if (param & 0xff000000)
cx = shlookup_a[(param>>24)+4096];
else
cx = shlookup_a[param>>12];
param = param >> (cx&0xff);
param = ((param&0xffff0000)|sqrtable_a[param]);
param = param >> ((cx&0xff00)>>8);
return param;
}
static __inline int32_t krecipasm(int32_t i)
{ // Ken did this
float f = (float)i;
i = *(int32_t *)&f;
return((reciptable[(i>>12)&2047]>>(((i-0x3f800000)>>23)&31))^(i>>31));
}
static __inline void setgotpic(int32_t tilenume)
{
if (walock[tilenume] < 200) walock[tilenume] = 199;
gotpic[tilenume>>3] |= pow2char[tilenume&7];
}
static __inline int32_t getclipmask(int32_t a, int32_t b, int32_t c, int32_t d)
{ // Ken did this
d = ((a<0)*8) + ((b<0)*4) + ((c<0)*2) + (d<0);
return(((d<<4)^0xf0)|d);
}
//
// krecip
//
int32_t krecip(int32_t num)
{
return(krecipasm(num));
}
unsigned short _swap16(unsigned short D)
{
return((D<<8)|(D>>8));
}
unsigned int _swap32(unsigned int D)
{
return((D<<24)|((D<<8)&0x00FF0000)|((D>>8)&0x0000FF00)|(D>>24));
}
/*
FCS:
Scan through sectors using portals (a portal is wall with a nextsector attribute >= 0).
Flood is prevented if a portal does not face the POV.
*/
static void scansector (short sectnum)
{
walltype *wal, *wal2;
spritetype *spr;
int32_t xs, ys, x1, y1, x2, y2, xp1, yp1, xp2=0, yp2=0, tempint;
short z, zz, startwall, endwall, numscansbefore, scanfirst, bunchfrst;
short nextsectnum;
if (sectnum < 0) return;
if (automapping) show2dsector[sectnum>>3] |= pow2char[sectnum&7];
sectorborder[0] = sectnum, sectorbordercnt = 1;
do
{
sectnum = sectorborder[--sectorbordercnt];
//Add every script in the current sector as potentially visible.
for(z=headspritesect[sectnum]; z>=0; z=nextspritesect[z])
{
spr = &sprite[z];
if ((((spr->cstat&0x8000) == 0) || (showinvisibility)) &&
(spr->xrepeat > 0) && (spr->yrepeat > 0) &&
(spritesortcnt < MAXSPRITESONSCREEN))
{
xs = spr->x-globalposx;
ys = spr->y-globalposy;
if ((spr->cstat&48) || (xs*cosglobalang+ys*singlobalang > 0))
{
copybufbyte(spr,&tsprite[spritesortcnt],sizeof(spritetype));
tsprite[spritesortcnt++].owner = z;
}
}
}
//Mark the current sector as "visited"
gotsector[sectnum>>3] |= pow2char[sectnum&7];
bunchfrst = numbunches;
numscansbefore = numscans;
startwall = sector[sectnum].wallptr;
endwall = startwall + sector[sectnum].wallnum;
scanfirst = numscans;
for(z=startwall,wal=&wall[z]; z<endwall; z++,wal++)
{
nextsectnum = wal->nextsector;
wal2 = &wall[wal->point2];
// In camera space the center is the player.
// Tranform the 2 Wall endpoints (x,y) from worldspace to camera space.
// After that we have two vectors starting from the camera and going to the endpoints (x1,y1) and (x2,y2).
x1 = wal->x-globalposx;
y1 = wal->y-globalposy;
x2 = wal2->x-globalposx;
y2 = wal2->y-globalposy;
// If this is a portal...
if ((nextsectnum >= 0) && ((wal->cstat&32) == 0))
//If this portal has not been visited yet.
if ((gotsector[nextsectnum>>3]&pow2char[nextsectnum&7]) == 0)
{
//Cross product -> Z component
tempint = x1*y2-x2*y1;
// Using cross product, determine if the portal is facing us or not.
// If it is: Add it to the stack and bump the stack counter.
// This line is equivalent to tempint < 0x40000
if (((unsigned)tempint+262144) < 524288) // ??? What is this test ?? How acute the angle is ?
{
//(x2-x1)*(x2-x1)+(y2-y1)*(y2-y1) is the squared length of the wall
// ??? What is this test ?? How acute the angle is ?
if (mulscale5(tempint,tempint) <= (x2-x1)*(x2-x1)+(y2-y1)*(y2-y1))
sectorborder[sectorbordercnt++] = nextsectnum;
}
}
// Rotate the wall endpoints vectors according to the player orientation.
// This is a regular rotation matrix using [29.3] fixed point.
if ((z == startwall) || (wall[z-1].point2 != z))
{
//If this is the first endpoint of the bunch, rotate: This is a standard cos sin 2D rotation matrix projection
xp1 = dmulscale6(y1,cosglobalang,-x1,singlobalang);
yp1 = dmulscale6(x1,cosviewingrangeglobalang,y1,sinviewingrangeglobalang);
}
else
{
//If this is NOT the first endpoint, Save the coordinate for next loop.
xp1 = xp2;
yp1 = yp2;
}
// Rotate: This is a standard cos sin 2D rotation matrix projection
xp2 = dmulscale6(y2,cosglobalang,-x2,singlobalang);
yp2 = dmulscale6(x2,cosviewingrangeglobalang,y2,sinviewingrangeglobalang);
// Equivalent of a near plane clipping ?
if ((yp1 < 256) && (yp2 < 256)) goto skipitaddwall;
/* If wall's NOT facing you */
if (dmulscale32(xp1,yp2,-xp2,yp1) >= 0) goto skipitaddwall;
// The wall is still not eligible for rendition: Let's do some more Frustrum culling !!
if (xp1 >= -yp1)
{
if ((xp1 > yp1) || (yp1 == 0))
goto skipitaddwall;
//Project the point onto screen and see in which column it belongs.
xb1[numscans] = halfxdimen + scale(xp1,halfxdimen,yp1);
if (xp1 >= 0)
xb1[numscans]++; /* Fix for SIGNED divide */
if (xb1[numscans] >= xdimen)
xb1[numscans] = xdimen-1;
yb1[numscans] = yp1;
}
else
{
if (xp2 < -yp2)
goto skipitaddwall;
xb1[numscans] = 0;
tempint = yp1-yp2+xp1-xp2;
if (tempint == 0)
goto skipitaddwall;
yb1[numscans] = yp1 + scale(yp2-yp1,xp1+yp1,tempint);
}
if (yb1[numscans] < 256)
goto skipitaddwall;
if (xp2 <= yp2)
{
if ((xp2 < -yp2) || (yp2 == 0)) goto skipitaddwall;
xb2[numscans] = halfxdimen + scale(xp2,halfxdimen,yp2) - 1;
if (xp2 >= 0) xb2[numscans]++; /* Fix for SIGNED divide */
if (xb2[numscans] >= xdimen) xb2[numscans] = xdimen-1;
yb2[numscans] = yp2;
}
else
{
if (xp1 > yp1) goto skipitaddwall;
xb2[numscans] = xdimen-1;
tempint = xp2-xp1+yp1-yp2;
if (tempint == 0) goto skipitaddwall;
yb2[numscans] = yp1 + scale(yp2-yp1,yp1-xp1,tempint);
}
if ((yb2[numscans] < 256) || (xb1[numscans] > xb2[numscans])) goto skipitaddwall;
// Made it all the way!
// Time to add this wall information to the stack of wall potentially visible.
thesector[numscans] = sectnum;
thewall[numscans] = z;
//Save the camera space wall endpoints coordinate (camera origin at player location + rotated according to player orientation).
rx1[numscans] = xp1;
ry1[numscans] = yp1;
rx2[numscans] = xp2;
ry2[numscans] = yp2;
p2[numscans] = numscans+1;
numscans++;
skipitaddwall:
if ((wall[z].point2 < z) && (scanfirst < numscans))
{
p2[numscans-1] = scanfirst;
scanfirst = numscans;
}
}
//FCS: TODO rename this p2[] to bunchList[] or something like that. This name is an abomination
//Break down the list of walls for this sector into bunchs. Since a bunch is a
// continuously visible list of wall: A sector can generate many bunches.
for(z=numscansbefore; z<numscans; z++)
{
if ((wall[thewall[z]].point2 != thewall[p2[z]]) || (xb2[z] >= xb1[p2[z]]))
{
// Create an entry in the bunch list
bunchfirst[numbunches++] = p2[z];
//Mark the end of the bunch wall list.
p2[z] = -1;
}
}
//For each bunch, find the last wall and cache it in bunchlast.
for(z=bunchfrst; z<numbunches; z++)
{
for(zz=bunchfirst[z]; p2[zz]>=0; zz=p2[zz]);
bunchlast[z] = zz;
}
} while (sectorbordercnt > 0);
// do this until the stack of sectors to visit if empty.
}
static void prepwall(int32_t z, walltype *wal)
{
int32_t i, l=0, ol=0, splc, sinc, x, topinc, top, botinc, bot, walxrepeat;
walxrepeat = (wal->xrepeat<<3);
/* lwall calculation */
i = xb1[z]-halfxdimen;
topinc = -(ry1[z]>>2);
botinc = ((ry2[z]-ry1[z])>>8);
top = mulscale5(rx1[z],xdimen)+mulscale2(topinc,i);
bot = mulscale11(rx1[z]-rx2[z],xdimen)+mulscale2(botinc,i);
splc = mulscale19(ry1[z],xdimscale);
sinc = mulscale16(ry2[z]-ry1[z],xdimscale);
x = xb1[z];
if (bot != 0)
{
l = divscale12(top,bot);
swall[x] = mulscale21(l,sinc)+splc;
l *= walxrepeat;
lwall[x] = (l>>18);
}
while (x+4 <= xb2[z])
{
top += topinc;
bot += botinc;
if (bot != 0)
{
ol = l;
l = divscale12(top,bot);
swall[x+4] = mulscale21(l,sinc)+splc;
l *= walxrepeat;
lwall[x+4] = (l>>18);
}
i = ((ol+l)>>1);
lwall[x+2] = (i>>18);
lwall[x+1] = ((ol+i)>>19);
lwall[x+3] = ((l+i)>>19);
swall[x+2] = ((swall[x]+swall[x+4])>>1);
swall[x+1] = ((swall[x]+swall[x+2])>>1);
swall[x+3] = ((swall[x+4]+swall[x+2])>>1);
x += 4;
}
if (x+2 <= xb2[z])
{
top += (topinc>>1);
bot += (botinc>>1);
if (bot != 0)
{
ol = l;
l = divscale12(top,bot);
swall[x+2] = mulscale21(l,sinc)+splc;
l *= walxrepeat;
lwall[x+2] = (l>>18);
}
lwall[x+1] = ((l+ol)>>19);
swall[x+1] = ((swall[x]+swall[x+2])>>1);
x += 2;
}
if (x+1 <= xb2[z])
{
bot += (botinc>>2);
if (bot != 0)
{
l = divscale12(top+(topinc>>2),bot);
swall[x+1] = mulscale21(l,sinc)+splc;
lwall[x+1] = mulscale18(l,walxrepeat);
}
}
if (lwall[xb1[z]] < 0) lwall[xb1[z]] = 0;
if ((lwall[xb2[z]] >= walxrepeat) && (walxrepeat)) lwall[xb2[z]] = walxrepeat-1;
if (wal->cstat&8)
{
walxrepeat--;
for(x=xb1[z]; x<=xb2[z]; x++) lwall[x] = walxrepeat-lwall[x];
}
}
static int getpalookup(int32_t davis, int32_t dashade)
{
return(min(max(dashade+(davis>>8),0),numpalookups-1));
}
static void hline (int32_t xr, int32_t yp)
{
int32_t xl, r, s;
xl = lastx[yp];
if (xl > xr) return;
r = horizlookup2[yp-globalhoriz+horizycent];
asm1 = globalx1*r;
asm2 = globaly2*r;
s = ((int32_t)getpalookup((int32_t)mulscale16(r,globvis),globalshade)<<8);
hlineasm4(xr-xl,0L,s,globalx2*r+globalypanning,globaly1*r+globalxpanning,
ylookup[yp]+xr+frameoffset);
}
static void slowhline (int32_t xr, int32_t yp)
{
int32_t xl, r;
xl = lastx[yp];
if (xl > xr) return;
r = horizlookup2[yp-globalhoriz+horizycent];
asm1 = globalx1*r;
asm2 = globaly2*r;
asm3 = (long)globalpalwritten + ((long)getpalookup((long)mulscale16(r,globvis),globalshade)<<8);
if (!(globalorientation&256))
{
mhline(globalbufplc,globaly1*r+globalxpanning-asm1*(xr-xl),(xr-xl)<<16,0L,
globalx2*r+globalypanning-asm2*(xr-xl),ylookup[yp]+xl+frameoffset);
return;
}
thline(globalbufplc,globaly1*r+globalxpanning-asm1*(xr-xl),(xr-xl)<<16,0L,
globalx2*r+globalypanning-asm2*(xr-xl),ylookup[yp]+xl+frameoffset);
transarea += (xr-xl);
}
static int animateoffs(int16_t tilenum, int16_t fakevar)
{
int32_t i, k, offs;
offs = 0;
i = (totalclocklock>>((picanm[tilenum]>>24)&15));
if ((picanm[tilenum]&63) > 0)
{
switch(picanm[tilenum]&192)
{
case 64:
k = (i%((picanm[tilenum]&63)<<1));
if (k < (picanm[tilenum]&63))
offs = k;
else
offs = (((picanm[tilenum]&63)<<1)-k);
break;
case 128:
offs = (i%((picanm[tilenum]&63)+1));
break;
case 192:
offs = -(i%((picanm[tilenum]&63)+1));
}
}
return(offs);
}
/* renders non-parallaxed ceilings. --ryan. */
static void ceilscan (int32_t x1, int32_t x2, int32_t sectnum)
{
int32_t i, j, ox, oy, x, y1, y2, twall, bwall;
sectortype *sec;
sec = §or[sectnum];
if (palookup[sec->ceilingpal] != globalpalwritten)
{
globalpalwritten = palookup[sec->ceilingpal];
setpalookupaddress(globalpalwritten);
}
globalzd = sec->ceilingz-globalposz;
if (globalzd > 0) return;
globalpicnum = sec->ceilingpicnum;
if ((unsigned)globalpicnum >= (unsigned)MAXTILES) globalpicnum = 0;
setgotpic(globalpicnum);
if ((tilesizx[globalpicnum] <= 0) || (tilesizy[globalpicnum] <= 0)) return;
if (picanm[globalpicnum]&192) globalpicnum += animateoffs((short)globalpicnum,(short)sectnum);
if (waloff[globalpicnum] == 0) loadtile(globalpicnum);
globalbufplc = waloff[globalpicnum];
globalshade = (long)sec->ceilingshade;
globvis = globalcisibility;
if (sec->visibility != 0) globvis = mulscale4(globvis,(long)((uint8_t )(sec->visibility+16)));
globalorientation = (long)sec->ceilingstat;
if ((globalorientation&64) == 0)
{
globalx1 = singlobalang;
globalx2 = singlobalang;
globaly1 = cosglobalang;
globaly2 = cosglobalang;
globalxpanning = (globalposx<<20);
globalypanning = -(globalposy<<20);
}
else
{
j = sec->wallptr;
ox = wall[wall[j].point2].x - wall[j].x;
oy = wall[wall[j].point2].y - wall[j].y;
i = nsqrtasm(ox*ox+oy*oy);
if (i == 0) i = 1024;
else i = 1048576/i;
globalx1 = mulscale10(dmulscale10(ox,singlobalang,-oy,cosglobalang),i);
globaly1 = mulscale10(dmulscale10(ox,cosglobalang,oy,singlobalang),i);
globalx2 = -globalx1;
globaly2 = -globaly1;
ox = ((wall[j].x-globalposx)<<6);
oy = ((wall[j].y-globalposy)<<6);
i = dmulscale14(oy,cosglobalang,-ox,singlobalang);
j = dmulscale14(ox,cosglobalang,oy,singlobalang);
ox = i;
oy = j;
globalxpanning = globalx1*ox - globaly1*oy;
globalypanning = globaly2*ox + globalx2*oy;
}
globalx2 = mulscale16(globalx2,viewingrangerecip);
globaly1 = mulscale16(globaly1,viewingrangerecip);
globalxshift = (8-(picsiz[globalpicnum]&15));
globalyshift = (8-(picsiz[globalpicnum]>>4));
if (globalorientation&8) {
globalxshift++;
globalyshift++;
}
if ((globalorientation&0x4) > 0)
{
i = globalxpanning;
globalxpanning = globalypanning;
globalypanning = i;
i = globalx2;
globalx2 = -globaly1;
globaly1 = -i;
i = globalx1;
globalx1 = globaly2;
globaly2 = i;
}
if ((globalorientation&0x10) > 0) globalx1 = -globalx1, globaly1 = -globaly1, globalxpanning = -globalxpanning;
if ((globalorientation&0x20) > 0) globalx2 = -globalx2, globaly2 = -globaly2, globalypanning = -globalypanning;
globalx1 <<= globalxshift;
globaly1 <<= globalxshift;
globalx2 <<= globalyshift;
globaly2 <<= globalyshift;
globalxpanning <<= globalxshift;
globalypanning <<= globalyshift;
globalxpanning += (((long)sec->ceilingxpanning)<<24);
globalypanning += (((long)sec->ceilingypanning)<<24);
globaly1 = (-globalx1-globaly1)*halfxdimen;
globalx2 = (globalx2-globaly2)*halfxdimen;
sethlinesizes(picsiz[globalpicnum]&15,picsiz[globalpicnum]>>4,globalbufplc);
globalx2 += globaly2*(x1-1);
globaly1 += globalx1*(x1-1);
globalx1 = mulscale16(globalx1,globalzd);
globalx2 = mulscale16(globalx2,globalzd);
globaly1 = mulscale16(globaly1,globalzd);
globaly2 = mulscale16(globaly2,globalzd);
globvis = klabs(mulscale10(globvis,globalzd));
if (!(globalorientation&0x180))
{
y1 = umost[x1];
y2 = y1;
for(x=x1; x<=x2; x++)
{
twall = umost[x]-1;
bwall = min(uplc[x],dmost[x]);
if (twall < bwall-1)
{
if (twall >= y2)
{
while (y1 < y2-1) hline(x-1,++y1);
y1 = twall;
}
else
{
while (y1 < twall) hline(x-1,++y1);
while (y1 > twall) lastx[y1--] = x;
}
while (y2 > bwall) hline(x-1,--y2);
while (y2 < bwall) lastx[y2++] = x;
}
else
{
while (y1 < y2-1) hline(x-1,++y1);
if (x == x2) {
globalx2 += globaly2;
globaly1 += globalx1;
break;
}
y1 = umost[x+1];
y2 = y1;
}
globalx2 += globaly2;
globaly1 += globalx1;
}
while (y1 < y2-1) hline(x2,++y1);
faketimerhandler();
return;
}
switch(globalorientation&0x180)
{
case 128:
msethlineshift(picsiz[globalpicnum]&15,picsiz[globalpicnum]>>4);
break;
case 256:
settrans(TRANS_NORMAL);
tsethlineshift(picsiz[globalpicnum]&15,picsiz[globalpicnum]>>4);
break;
case 384:
settrans(TRANS_REVERSE);
tsethlineshift(picsiz[globalpicnum]&15,picsiz[globalpicnum]>>4);
break;
}
y1 = umost[x1];
y2 = y1;
for(x=x1; x<=x2; x++)
{
twall = umost[x]-1;
bwall = min(uplc[x],dmost[x]);
if (twall < bwall-1)
{
if (twall >= y2)
{
while (y1 < y2-1) slowhline(x-1,++y1);
y1 = twall;
}
else
{
while (y1 < twall) slowhline(x-1,++y1);
while (y1 > twall) lastx[y1--] = x;
}
while (y2 > bwall) slowhline(x-1,--y2);
while (y2 < bwall) lastx[y2++] = x;
}
else
{
while (y1 < y2-1) slowhline(x-1,++y1);
if (x == x2) {
globalx2 += globaly2;
globaly1 += globalx1;
break;
}
y1 = umost[x+1];
y2 = y1;
}
globalx2 += globaly2;
globaly1 += globalx1;
}
while (y1 < y2-1) slowhline(x2,++y1);
faketimerhandler();
}
/* renders non-parallaxed floors. --ryan. */
static void florscan (int32_t x1, int32_t x2, int32_t sectnum)
{
int32_t i, j, ox, oy, x, y1, y2, twall, bwall;
sectortype *sec;
sec = §or[sectnum];
if (palookup[sec->floorpal] != globalpalwritten)
{
globalpalwritten = palookup[sec->floorpal];
setpalookupaddress(globalpalwritten);
}
globalzd = globalposz-sec->floorz;
if (globalzd > 0) return;
globalpicnum = sec->floorpicnum;
if ((unsigned)globalpicnum >= (unsigned)MAXTILES) globalpicnum = 0;
setgotpic(globalpicnum);
if ((tilesizx[globalpicnum] <= 0) || (tilesizy[globalpicnum] <= 0)) return;
if (picanm[globalpicnum]&192) globalpicnum += animateoffs((short)globalpicnum,(short)sectnum);
if (waloff[globalpicnum] == 0) loadtile(globalpicnum);
globalbufplc = waloff[globalpicnum];
globalshade = (long)sec->floorshade;
globvis = globalcisibility;
if (sec->visibility != 0) globvis = mulscale4(globvis,(long)((uint8_t )(sec->visibility+16)));
globalorientation = (long)sec->floorstat;
if ((globalorientation&64) == 0)
{
globalx1 = singlobalang;
globalx2 = singlobalang;
globaly1 = cosglobalang;
globaly2 = cosglobalang;
globalxpanning = (globalposx<<20);
globalypanning = -(globalposy<<20);
}
else
{
j = sec->wallptr;
ox = wall[wall[j].point2].x - wall[j].x;
oy = wall[wall[j].point2].y - wall[j].y;
i = nsqrtasm(ox*ox+oy*oy);
if (i == 0) i = 1024;
else i = 1048576/i;
globalx1 = mulscale10(dmulscale10(ox,singlobalang,-oy,cosglobalang),i);
globaly1 = mulscale10(dmulscale10(ox,cosglobalang,oy,singlobalang),i);
globalx2 = -globalx1;
globaly2 = -globaly1;
ox = ((wall[j].x-globalposx)<<6);
oy = ((wall[j].y-globalposy)<<6);
i = dmulscale14(oy,cosglobalang,-ox,singlobalang);
j = dmulscale14(ox,cosglobalang,oy,singlobalang);
ox = i;
oy = j;
globalxpanning = globalx1*ox - globaly1*oy;
globalypanning = globaly2*ox + globalx2*oy;
}
globalx2 = mulscale16(globalx2,viewingrangerecip);
globaly1 = mulscale16(globaly1,viewingrangerecip);
globalxshift = (8-(picsiz[globalpicnum]&15));
globalyshift = (8-(picsiz[globalpicnum]>>4));
if (globalorientation&8) {
globalxshift++;
globalyshift++;
}
if ((globalorientation&0x4) > 0)
{
i = globalxpanning;
globalxpanning = globalypanning;
globalypanning = i;
i = globalx2;
globalx2 = -globaly1;
globaly1 = -i;
i = globalx1;
globalx1 = globaly2;
globaly2 = i;
}
if ((globalorientation&0x10) > 0) globalx1 = -globalx1, globaly1 = -globaly1, globalxpanning = -globalxpanning;
if ((globalorientation&0x20) > 0) globalx2 = -globalx2, globaly2 = -globaly2, globalypanning = -globalypanning;
globalx1 <<= globalxshift;
globaly1 <<= globalxshift;
globalx2 <<= globalyshift;
globaly2 <<= globalyshift;
globalxpanning <<= globalxshift;
globalypanning <<= globalyshift;
globalxpanning += (((long)sec->floorxpanning)<<24);
globalypanning += (((long)sec->floorypanning)<<24);
globaly1 = (-globalx1-globaly1)*halfxdimen;
globalx2 = (globalx2-globaly2)*halfxdimen;
sethlinesizes(picsiz[globalpicnum]&15,picsiz[globalpicnum]>>4,globalbufplc);
globalx2 += globaly2*(x1-1);
globaly1 += globalx1*(x1-1);
globalx1 = mulscale16(globalx1,globalzd);
globalx2 = mulscale16(globalx2,globalzd);
globaly1 = mulscale16(globaly1,globalzd);
globaly2 = mulscale16(globaly2,globalzd);
globvis = klabs(mulscale10(globvis,globalzd));
if (!(globalorientation&0x180))
{
y1 = max(dplc[x1],umost[x1]);
y2 = y1;
for(x=x1; x<=x2; x++)
{
twall = max(dplc[x],umost[x])-1;
bwall = dmost[x];
if (twall < bwall-1)
{
if (twall >= y2)
{
while (y1 < y2-1) hline(x-1,++y1);
y1 = twall;
}
else
{
while (y1 < twall) hline(x-1,++y1);
while (y1 > twall) lastx[y1--] = x;
}
while (y2 > bwall) hline(x-1,--y2);
while (y2 < bwall) lastx[y2++] = x;
}
else
{
while (y1 < y2-1) hline(x-1,++y1);
if (x == x2) {
globalx2 += globaly2;
globaly1 += globalx1;
break;
}
y1 = max(dplc[x+1],umost[x+1]);
y2 = y1;
}
globalx2 += globaly2;
globaly1 += globalx1;
}
while (y1 < y2-1) hline(x2,++y1);
faketimerhandler();
return;
}
switch(globalorientation&0x180)
{
case 128:
msethlineshift(picsiz[globalpicnum]&15,picsiz[globalpicnum]>>4);
break;
case 256:
settrans(TRANS_NORMAL);
tsethlineshift(picsiz[globalpicnum]&15,picsiz[globalpicnum]>>4);
break;
case 384:
settrans(TRANS_REVERSE);
tsethlineshift(picsiz[globalpicnum]&15,picsiz[globalpicnum]>>4);
break;
}
y1 = max(dplc[x1],umost[x1]);
y2 = y1;
for(x=x1; x<=x2; x++)
{
twall = max(dplc[x],umost[x])-1;
bwall = dmost[x];
if (twall < bwall-1)
{
if (twall >= y2)
{
while (y1 < y2-1) slowhline(x-1,++y1);
y1 = twall;
}
else
{
while (y1 < twall) slowhline(x-1,++y1);
while (y1 > twall) lastx[y1--] = x;
}
while (y2 > bwall) slowhline(x-1,--y2);
while (y2 < bwall) lastx[y2++] = x;
}
else
{
while (y1 < y2-1) slowhline(x-1,++y1);
if (x == x2) {
globalx2 += globaly2;
globaly1 += globalx1;
break;
}
y1 = max(dplc[x+1],umost[x+1]);
y2 = y1;
}
globalx2 += globaly2;
globaly1 += globalx1;
}
while (y1 < y2-1) slowhline(x2,++y1);
faketimerhandler();
}
/*
* renders walls and parallaxed skies/floors. Look at parascan() for the
* higher level of parallaxing.
*
* x1 == offset of leftmost pixel of wall. 0 is left of surface.
* x2 == offset of rightmost pixel of wall. 0 is left of surface.
*
* apparently, walls are always vertical; there are sloping functions
* (!!!) er...elsewhere. Only the sides need be vertical, as the top and
* bottom of the polygon will need to be angled as the camera perspective
* shifts (user spins in a circle, etc.)
*
* uwal is an array of the upper most pixels, and dwal are the lower most.
* This must be a list, as the top and bottom of the polygon are not
* necessarily horizontal lines.
*
* So, the screen coordinate of the top left of a wall is specified by
* uwal[x1], the bottom left by dwal[x1], the top right by uwal[x2], and
* the bottom right by dwal[x2]. Every physical point on the edge of the
* wall in between is specified by traversing those arrays, one pixel per
* element.
*
* --ryan.
*/
static void wallscan(int32_t x1, int32_t x2,
int16_t *uwal, int16_t *dwal,
int32_t *swal, int32_t *lwal)
{
int32_t i, x, xnice, ynice, fpalookup;
int32_t y1ve[4], y2ve[4], u4, d4, z, tsizx, tsizy;
uint8_t bad;
tsizx = tilesizx[globalpicnum];
tsizy = tilesizy[globalpicnum];
setgotpic(globalpicnum);
if ((tsizx <= 0) || (tsizy <= 0)) return;
if ((uwal[x1] > ydimen) && (uwal[x2] > ydimen)) return;
if ((dwal[x1] < 0) && (dwal[x2] < 0)) return;
if (waloff[globalpicnum] == 0) loadtile(globalpicnum);
xnice = (pow2long[picsiz[globalpicnum]&15] == tsizx);
if (xnice) tsizx--;
ynice = (pow2long[picsiz[globalpicnum]>>4] == tsizy);
if (ynice) tsizy = (picsiz[globalpicnum]>>4);
fpalookup = (long)FP_OFF(palookup[globalpal]);
setupvlineasm(globalshiftval);
x = x1;
while ((umost[x] > dmost[x]) && (x <= x2)) x++;
for(; (x<=x2)&&((x+frameoffset)&3); x++)
{
y1ve[0] = max(uwal[x],umost[x]);
y2ve[0] = min(dwal[x],dmost[x]);
if (y2ve[0] <= y1ve[0]) continue;
palookupoffse[0] = fpalookup+(getpalookup((long)mulscale16(swal[x],globvis),globalshade)<<8);
bufplce[0] = lwal[x] + globalxpanning;
if (bufplce[0] >= tsizx)
{
if (xnice == 0)
bufplce[0] %= tsizx;
else
bufplce[0] &= tsizx;
}
if (ynice == 0)
bufplce[0] *= tsizy;
else
bufplce[0] <<= tsizy;
vince[0] = swal[x]*globalyscale;
vplce[0] = globalzd + vince[0]*(y1ve[0]-globalhoriz+1);
vlineasm1(vince[0],palookupoffse[0],y2ve[0]-y1ve[0]-1,vplce[0],bufplce[0]+waloff[globalpicnum],x+frameoffset+ylookup[y1ve[0]]);
}
for(; x<=x2-3; x+=4)
{
bad = 0;
for(z=3; z>=0; z--)
{
y1ve[z] = max(uwal[x+z],umost[x+z]);
y2ve[z] = min(dwal[x+z],dmost[x+z])-1;
if (y2ve[z] < y1ve[z])
{
bad += pow2char[z];
continue;
}
i = lwal[x+z] + globalxpanning;
if (i >= tsizx) {
if (xnice == 0) i %= tsizx;
else i &= tsizx;
}
if (ynice == 0) i *= tsizy;
else i <<= tsizy;
bufplce[z] = waloff[globalpicnum]+i;
vince[z] = swal[x+z]*globalyscale;
vplce[z] = globalzd + vince[z]*(y1ve[z]-globalhoriz+1);
}
if (bad == 15) continue;
palookupoffse[0] = fpalookup+(getpalookup((long)mulscale16(swal[x],globvis),globalshade)<<8);
palookupoffse[3] = fpalookup+(getpalookup((long)mulscale16(swal[x+3],globvis),globalshade)<<8);
if ((palookupoffse[0] == palookupoffse[3]) && ((bad&0x9) == 0))
{
palookupoffse[1] = palookupoffse[0];
palookupoffse[2] = palookupoffse[0];
}
else
{
palookupoffse[1] = fpalookup+(getpalookup((long)mulscale16(swal[x+1],globvis),globalshade)<<8);
palookupoffse[2] = fpalookup+(getpalookup((long)mulscale16(swal[x+2],globvis),globalshade)<<8);
}
u4 = max(max(y1ve[0],y1ve[1]),max(y1ve[2],y1ve[3]));
d4 = min(min(y2ve[0],y2ve[1]),min(y2ve[2],y2ve[3]));
if ((bad != 0) || (u4 >= d4))
{
if (!(bad&1)) prevlineasm1(vince[0],palookupoffse[0],y2ve[0]-y1ve[0],vplce[0],bufplce[0],ylookup[y1ve[0]]+x+frameoffset+0);
if (!(bad&2)) prevlineasm1(vince[1],palookupoffse[1],y2ve[1]-y1ve[1],vplce[1],bufplce[1],ylookup[y1ve[1]]+x+frameoffset+1);
if (!(bad&4)) prevlineasm1(vince[2],palookupoffse[2],y2ve[2]-y1ve[2],vplce[2],bufplce[2],ylookup[y1ve[2]]+x+frameoffset+2);
if (!(bad&8)) prevlineasm1(vince[3],palookupoffse[3],y2ve[3]-y1ve[3],vplce[3],bufplce[3],ylookup[y1ve[3]]+x+frameoffset+3);
continue;
}
if (u4 > y1ve[0]) vplce[0] = prevlineasm1(vince[0],palookupoffse[0],u4-y1ve[0]-1,vplce[0],bufplce[0],ylookup[y1ve[0]]+x+frameoffset+0);
if (u4 > y1ve[1]) vplce[1] = prevlineasm1(vince[1],palookupoffse[1],u4-y1ve[1]-1,vplce[1],bufplce[1],ylookup[y1ve[1]]+x+frameoffset+1);
if (u4 > y1ve[2]) vplce[2] = prevlineasm1(vince[2],palookupoffse[2],u4-y1ve[2]-1,vplce[2],bufplce[2],ylookup[y1ve[2]]+x+frameoffset+2);
if (u4 > y1ve[3]) vplce[3] = prevlineasm1(vince[3],palookupoffse[3],u4-y1ve[3]-1,vplce[3],bufplce[3],ylookup[y1ve[3]]+x+frameoffset+3);
if (d4 >= u4) vlineasm4(d4-u4+1,ylookup[u4]+x+frameoffset);
i = x+frameoffset+ylookup[d4+1];
if (y2ve[0] > d4) prevlineasm1(vince[0],palookupoffse[0],y2ve[0]-d4-1,vplce[0],bufplce[0],i+0);
if (y2ve[1] > d4) prevlineasm1(vince[1],palookupoffse[1],y2ve[1]-d4-1,vplce[1],bufplce[1],i+1);
if (y2ve[2] > d4) prevlineasm1(vince[2],palookupoffse[2],y2ve[2]-d4-1,vplce[2],bufplce[2],i+2);
if (y2ve[3] > d4) prevlineasm1(vince[3],palookupoffse[3],y2ve[3]-d4-1,vplce[3],bufplce[3],i+3);
}
for(; x<=x2; x++)
{
y1ve[0] = max(uwal[x],umost[x]);
y2ve[0] = min(dwal[x],dmost[x]);
if (y2ve[0] <= y1ve[0]) continue;
palookupoffse[0] = fpalookup+(getpalookup((long)mulscale16(swal[x],globvis),globalshade)<<8);
bufplce[0] = lwal[x] + globalxpanning;
if (bufplce[0] >= tsizx) {
if (xnice == 0) bufplce[0] %= tsizx;
else bufplce[0] &= tsizx;
}
if (ynice == 0) bufplce[0] *= tsizy;
else bufplce[0] <<= tsizy;
vince[0] = swal[x]*globalyscale;
vplce[0] = globalzd + vince[0]*(y1ve[0]-globalhoriz+1);
vlineasm1(vince[0],palookupoffse[0],y2ve[0]-y1ve[0]-1,vplce[0],bufplce[0]+waloff[globalpicnum],x+frameoffset+ylookup[y1ve[0]]);
}
faketimerhandler();
}
/* this renders masking sprites. See wallscan(). --ryan. */
static void maskwallscan(int32_t x1, int32_t x2,
short *uwal, short *dwal,
int32_t *swal, int32_t *lwal)
{
int32_t i, x, startx, xnice, ynice, fpalookup;
int32_t y1ve[4], y2ve[4], u4, d4, dax, z, p, tsizx, tsizy;
uint8_t bad;
tsizx = tilesizx[globalpicnum];
tsizy = tilesizy[globalpicnum];
setgotpic(globalpicnum);
if ((tsizx <= 0) || (tsizy <= 0)) return;
if ((uwal[x1] > ydimen) && (uwal[x2] > ydimen)) return;
if ((dwal[x1] < 0) && (dwal[x2] < 0)) return;
if (waloff[globalpicnum] == 0) loadtile(globalpicnum);
startx = x1;
xnice = (pow2long[picsiz[globalpicnum]&15] == tsizx);
if (xnice) tsizx = (tsizx-1);
ynice = (pow2long[picsiz[globalpicnum]>>4] == tsizy);
if (ynice) tsizy = (picsiz[globalpicnum]>>4);
fpalookup = (long)FP_OFF(palookup[globalpal]);
setupmvlineasm(globalshiftval);
x = startx;
while ((startumost[x+windowx1] > startdmost[x+windowx1]) && (x <= x2)) x++;
p = x+frameoffset;
for(; (x<=x2)&&(p&3); x++,p++)
{
y1ve[0] = max(uwal[x],startumost[x+windowx1]-windowy1);
y2ve[0] = min(dwal[x],startdmost[x+windowx1]-windowy1);
if (y2ve[0] <= y1ve[0]) continue;
palookupoffse[0] = fpalookup+(getpalookup((long)mulscale16(swal[x],globvis),globalshade)<<8);
bufplce[0] = lwal[x] + globalxpanning;
if (bufplce[0] >= tsizx) {
if (xnice == 0) bufplce[0] %= tsizx;
else bufplce[0] &= tsizx;
}
if (ynice == 0) bufplce[0] *= tsizy;
else bufplce[0] <<= tsizy;
vince[0] = swal[x]*globalyscale;
vplce[0] = globalzd + vince[0]*(y1ve[0]-globalhoriz+1);
mvlineasm1(vince[0],palookupoffse[0],y2ve[0]-y1ve[0]-1,vplce[0],bufplce[0]+waloff[globalpicnum],p+ylookup[y1ve[0]]);
}
for(; x<=x2-3; x+=4,p+=4)
{
bad = 0;
for(z=3,dax=x+3; z>=0; z--,dax--)
{
y1ve[z] = max(uwal[dax],startumost[dax+windowx1]-windowy1);
y2ve[z] = min(dwal[dax],startdmost[dax+windowx1]-windowy1)-1;
if (y2ve[z] < y1ve[z]) {
bad += pow2char[z];
continue;
}
i = lwal[dax] + globalxpanning;
if (i >= tsizx) {
if (xnice == 0) i %= tsizx;
else i &= tsizx;
}
if (ynice == 0) i *= tsizy;
else i <<= tsizy;
bufplce[z] = waloff[globalpicnum]+i;
vince[z] = swal[dax]*globalyscale;
vplce[z] = globalzd + vince[z]*(y1ve[z]-globalhoriz+1);
}
if (bad == 15) continue;
palookupoffse[0] = fpalookup+(getpalookup((long)mulscale16(swal[x],globvis),globalshade)<<8);
palookupoffse[3] = fpalookup+(getpalookup((long)mulscale16(swal[x+3],globvis),globalshade)<<8);
if ((palookupoffse[0] == palookupoffse[3]) && ((bad&0x9) == 0))
{
palookupoffse[1] = palookupoffse[0];
palookupoffse[2] = palookupoffse[0];
}
else
{
palookupoffse[1] = fpalookup+(getpalookup((long)mulscale16(swal[x+1],globvis),globalshade)<<8);
palookupoffse[2] = fpalookup+(getpalookup((long)mulscale16(swal[x+2],globvis),globalshade)<<8);
}
u4 = max(max(y1ve[0],y1ve[1]),max(y1ve[2],y1ve[3]));
d4 = min(min(y2ve[0],y2ve[1]),min(y2ve[2],y2ve[3]));
if ((bad > 0) || (u4 >= d4))
{
if (!(bad&1)) mvlineasm1(vince[0],palookupoffse[0],y2ve[0]-y1ve[0],vplce[0],bufplce[0],ylookup[y1ve[0]]+p+0);
if (!(bad&2)) mvlineasm1(vince[1],palookupoffse[1],y2ve[1]-y1ve[1],vplce[1],bufplce[1],ylookup[y1ve[1]]+p+1);
if (!(bad&4)) mvlineasm1(vince[2],palookupoffse[2],y2ve[2]-y1ve[2],vplce[2],bufplce[2],ylookup[y1ve[2]]+p+2);
if (!(bad&8)) mvlineasm1(vince[3],palookupoffse[3],y2ve[3]-y1ve[3],vplce[3],bufplce[3],ylookup[y1ve[3]]+p+3);
continue;
}
if (u4 > y1ve[0]) vplce[0] = mvlineasm1(vince[0],palookupoffse[0],u4-y1ve[0]-1,vplce[0],bufplce[0],ylookup[y1ve[0]]+p+0);
if (u4 > y1ve[1]) vplce[1] = mvlineasm1(vince[1],palookupoffse[1],u4-y1ve[1]-1,vplce[1],bufplce[1],ylookup[y1ve[1]]+p+1);
if (u4 > y1ve[2]) vplce[2] = mvlineasm1(vince[2],palookupoffse[2],u4-y1ve[2]-1,vplce[2],bufplce[2],ylookup[y1ve[2]]+p+2);
if (u4 > y1ve[3]) vplce[3] = mvlineasm1(vince[3],palookupoffse[3],u4-y1ve[3]-1,vplce[3],bufplce[3],ylookup[y1ve[3]]+p+3);
if (d4 >= u4) mvlineasm4(d4-u4+1,ylookup[u4]+p);
i = p+ylookup[d4+1];
if (y2ve[0] > d4) mvlineasm1(vince[0],palookupoffse[0],y2ve[0]-d4-1,vplce[0],bufplce[0],i+0);
if (y2ve[1] > d4) mvlineasm1(vince[1],palookupoffse[1],y2ve[1]-d4-1,vplce[1],bufplce[1],i+1);
if (y2ve[2] > d4) mvlineasm1(vince[2],palookupoffse[2],y2ve[2]-d4-1,vplce[2],bufplce[2],i+2);
if (y2ve[3] > d4) mvlineasm1(vince[3],palookupoffse[3],y2ve[3]-d4-1,vplce[3],bufplce[3],i+3);
}
for(; x<=x2; x++,p++)
{
y1ve[0] = max(uwal[x],startumost[x+windowx1]-windowy1);
y2ve[0] = min(dwal[x],startdmost[x+windowx1]-windowy1);
if (y2ve[0] <= y1ve[0]) continue;
palookupoffse[0] = fpalookup+(getpalookup((long)mulscale16(swal[x],globvis),globalshade)<<8);
bufplce[0] = lwal[x] + globalxpanning;
if (bufplce[0] >= tsizx) {
if (xnice == 0) bufplce[0] %= tsizx;
else bufplce[0] &= tsizx;
}
if (ynice == 0) bufplce[0] *= tsizy;
else bufplce[0] <<= tsizy;
vince[0] = swal[x]*globalyscale;
vplce[0] = globalzd + vince[0]*(y1ve[0]-globalhoriz+1);
mvlineasm1(vince[0],palookupoffse[0],y2ve[0]-y1ve[0]-1,vplce[0],bufplce[0]+waloff[globalpicnum],p+ylookup[y1ve[0]]);
}
faketimerhandler();
}
/* renders parallaxed skies/floors --ryan. */
static void parascan(int32_t dax1, int32_t dax2, int32_t sectnum,
uint8_t dastat, int32_t bunch)
{
sectortype *sec;
int32_t j, k, l, m, n, x, z, wallnum, nextsectnum, globalhorizbak;
short *topptr, *botptr;
sectnum = thesector[bunchfirst[bunch]];
sec = §or[sectnum];
globalhorizbak = globalhoriz;
if (parallaxyscale != 65536)
globalhoriz = mulscale16(globalhoriz-(ydimen>>1),parallaxyscale) + (ydimen>>1);
globvis = globalpisibility;
/* globalorientation = 0L; */
if (sec->visibility != 0) globvis = mulscale4(globvis,(long)((uint8_t )(sec->visibility+16)));
if (dastat == 0)
{
globalpal = sec->ceilingpal;
globalpicnum = sec->ceilingpicnum;
globalshade = (long)sec->ceilingshade;
globalxpanning = (long)sec->ceilingxpanning;
globalypanning = (long)sec->ceilingypanning;
topptr = umost;
botptr = uplc;
}
else
{
globalpal = sec->floorpal;
globalpicnum = sec->floorpicnum;
globalshade = (long)sec->floorshade;
globalxpanning = (long)sec->floorxpanning;
globalypanning = (long)sec->floorypanning;
topptr = dplc;
botptr = dmost;
}
if ((unsigned)globalpicnum >= (unsigned)MAXTILES) globalpicnum = 0;
if (picanm[globalpicnum]&192) globalpicnum += animateoffs(globalpicnum,(short)sectnum);
globalshiftval = (picsiz[globalpicnum]>>4);
if (pow2long[globalshiftval] != tilesizy[globalpicnum]) globalshiftval++;
globalshiftval = 32-globalshiftval;
globalzd = (((tilesizy[globalpicnum]>>1)+parallaxyoffs)<<globalshiftval)+(globalypanning<<24);
globalyscale = (8<<(globalshiftval-19));
/*if (globalorientation&256) globalyscale = -globalyscale, globalzd = -globalzd;*/
k = 11 - (picsiz[globalpicnum]&15) - pskybits;
x = -1;
for(z=bunchfirst[bunch]; z>=0; z=p2[z])
{
wallnum = thewall[z];
nextsectnum = wall[wallnum].nextsector;
if (dastat == 0) j = sector[nextsectnum].ceilingstat;
else j = sector[nextsectnum].floorstat;
if ((nextsectnum < 0) || (wall[wallnum].cstat&32) || ((j&1) == 0))
{
if (x == -1) x = xb1[z];
if (parallaxtype == 0)
{
n = mulscale16(xdimenrecip,viewingrange);
for(j=xb1[z]; j<=xb2[z]; j++)
lplc[j] = (((mulscale23(j-halfxdimen,n)+globalang)&2047)>>k);
}
else
{
for(j=xb1[z]; j<=xb2[z]; j++)
lplc[j] = ((((long)radarang2[j]+globalang)&2047)>>k);
}
if (parallaxtype == 2)
{
n = mulscale16(xdimscale,viewingrange);
for(j=xb1[z]; j<=xb2[z]; j++)
swplc[j] = mulscale14(sintable[((long)radarang2[j]+512)&2047],n);
}
else
clearbuf(&swplc[xb1[z]],xb2[z]-xb1[z]+1,mulscale16(xdimscale,viewingrange));
}
else if (x >= 0)
{
l = globalpicnum;
m = (picsiz[globalpicnum]&15);
globalpicnum = l+pskyoff[lplc[x]>>m];
if (((lplc[x]^lplc[xb1[z]-1])>>m) == 0)
wallscan(x,xb1[z]-1,topptr,botptr,swplc,lplc);
else
{
j = x;
while (x < xb1[z])
{
n = l+pskyoff[lplc[x]>>m];
if (n != globalpicnum)
{
wallscan(j,x-1,topptr,botptr,swplc,lplc);
j = x;
globalpicnum = n;
}
x++;
}
if (j < x)
wallscan(j,x-1,topptr,botptr,swplc,lplc);
}
globalpicnum = l;
x = -1;
}
}
if (x >= 0)
{
l = globalpicnum;
m = (picsiz[globalpicnum]&15);
globalpicnum = l+pskyoff[lplc[x]>>m];
if (((lplc[x]^lplc[xb2[bunchlast[bunch]]])>>m) == 0)
wallscan(x,xb2[bunchlast[bunch]],topptr,botptr,swplc,lplc);
else
{
j = x;
while (x <= xb2[bunchlast[bunch]])
{
n = l+pskyoff[lplc[x]>>m];
if (n != globalpicnum)
{
wallscan(j,x-1,topptr,botptr,swplc,lplc);
j = x;
globalpicnum = n;
}
x++;
}
if (j <= x)
wallscan(j,x,topptr,botptr,swplc,lplc);
}
globalpicnum = l;
}
globalhoriz = globalhorizbak;
}
#define BITSOFPRECISION 3 /* Don't forget to change this in A.ASM also! */
static void grouscan (int32_t dax1, int32_t dax2, int32_t sectnum, uint8_t dastat)
{
int32_t i, j, l, x, y, dx, dy, wx, wy, y1, y2, daz;
int32_t daslope, dasqr;
int32_t shoffs, shinc, m1, m2, *mptr1, *mptr2, *nptr1, *nptr2;
walltype *wal;
sectortype *sec;
sec = §or[sectnum];
if (dastat == 0)
{
if (globalposz <= getceilzofslope((short) sectnum,globalposx,globalposy))
return; /* Back-face culling */
globalorientation = sec->ceilingstat;
globalpicnum = sec->ceilingpicnum;
globalshade = sec->ceilingshade;
globalpal = sec->ceilingpal;
daslope = sec->ceilingheinum;
daz = sec->ceilingz;
}
else
{
if (globalposz >= getflorzofslope((short) sectnum,globalposx,globalposy))
return; /* Back-face culling */
globalorientation = sec->floorstat;
globalpicnum = sec->floorpicnum;
globalshade = sec->floorshade;
globalpal = sec->floorpal;
daslope = sec->floorheinum;
daz = sec->floorz;
}
if ((picanm[globalpicnum]&192) != 0) globalpicnum += animateoffs(globalpicnum,(short) sectnum);
setgotpic(globalpicnum);
if ((tilesizx[globalpicnum] <= 0) || (tilesizy[globalpicnum] <= 0)) return;
if (waloff[globalpicnum] == 0) loadtile(globalpicnum);
wal = &wall[sec->wallptr];
wx = wall[wal->point2].x - wal->x;
wy = wall[wal->point2].y - wal->y;
dasqr = krecipasm(nsqrtasm(wx*wx+wy*wy));
i = mulscale21(daslope,dasqr);
wx *= i;
wy *= i;
globalx = -mulscale19(singlobalang,xdimenrecip);
globaly = mulscale19(cosglobalang,xdimenrecip);
globalx1 = (globalposx<<8);
globaly1 = -(globalposy<<8);
i = (dax1-halfxdimen)*xdimenrecip;
globalx2 = mulscale16(cosglobalang<<4,viewingrangerecip) - mulscale27(singlobalang,i);
globaly2 = mulscale16(singlobalang<<4,viewingrangerecip) + mulscale27(cosglobalang,i);
globalzd = (xdimscale<<9);
globalzx = -dmulscale17(wx,globaly2,-wy,globalx2) + mulscale10(1-globalhoriz,globalzd);
globalz = -dmulscale25(wx,globaly,-wy,globalx);
if (globalorientation&64) /* Relative alignment */
{
dx = mulscale14(wall[wal->point2].x-wal->x,dasqr);
dy = mulscale14(wall[wal->point2].y-wal->y,dasqr);
i = nsqrtasm(daslope*daslope+16777216);
x = globalx;
y = globaly;
globalx = dmulscale16(x,dx,y,dy);
globaly = mulscale12(dmulscale16(-y,dx,x,dy),i);
x = ((wal->x-globalposx)<<8);
y = ((wal->y-globalposy)<<8);
globalx1 = dmulscale16(-x,dx,-y,dy);
globaly1 = mulscale12(dmulscale16(-y,dx,x,dy),i);
x = globalx2;
y = globaly2;
globalx2 = dmulscale16(x,dx,y,dy);
globaly2 = mulscale12(dmulscale16(-y,dx,x,dy),i);
}
if (globalorientation&0x4)
{
i = globalx;
globalx = -globaly;
globaly = -i;
i = globalx1;
globalx1 = globaly1;
globaly1 = i;
i = globalx2;
globalx2 = -globaly2;
globaly2 = -i;
}
if (globalorientation&0x10) {
globalx1 = -globalx1, globalx2 = -globalx2, globalx = -globalx;
}
if (globalorientation&0x20) {
globaly1 = -globaly1, globaly2 = -globaly2, globaly = -globaly;
}
daz = dmulscale9(wx,globalposy-wal->y,-wy,globalposx-wal->x) + ((daz-globalposz)<<8);
globalx2 = mulscale20(globalx2,daz);
globalx = mulscale28(globalx,daz);
globaly2 = mulscale20(globaly2,-daz);
globaly = mulscale28(globaly,-daz);
i = 8-(picsiz[globalpicnum]&15);
j = 8-(picsiz[globalpicnum]>>4);
if (globalorientation&8) {
i++;
j++;
}
globalx1 <<= (i+12);
globalx2 <<= i;
globalx <<= i;
globaly1 <<= (j+12);
globaly2 <<= j;
globaly <<= j;
if (dastat == 0)
{
globalx1 += (((long)sec->ceilingxpanning)<<24);
globaly1 += (((long)sec->ceilingypanning)<<24);
}
else
{
globalx1 += (((long)sec->floorxpanning)<<24);
globaly1 += (((long)sec->floorypanning)<<24);
}
asm1 = -(globalzd>>(16-BITSOFPRECISION));
globvis = globalvisibility;
if (sec->visibility != 0) globvis = mulscale4(globvis,(long)((uint8_t )(sec->visibility+16)));
globvis = mulscale13(globvis,daz);
globvis = mulscale16(globvis,xdimscale);
j =(long) FP_OFF(palookup[globalpal]);
setupslopevlin(((long)(picsiz[globalpicnum]&15))+(((long)(picsiz[globalpicnum]>>4))<<8),waloff[globalpicnum],-ylookup[1]);
l = (globalzd>>16);
shinc = mulscale16(globalz,xdimenscale);
if (shinc > 0) shoffs = (4<<15);
else shoffs = ((16380-ydimen)<<15); // JBF: was 2044 16380
if (dastat == 0) y1 = umost[dax1];
else y1 = max(umost[dax1],dplc[dax1]);
m1 = mulscale16(y1,globalzd) + (globalzx>>6);
/* Avoid visibility overflow by crossing horizon */
if (globalzd > 0) m1 += (globalzd>>16);
else m1 -= (globalzd>>16);
m2 = m1+l;
mptr1 = (int32_t *)&slopalookup[y1+(shoffs>>15)];
mptr2 = mptr1+1;
for(x=dax1; x<=dax2; x++)
{
if (dastat == 0) {
y1 = umost[x];
y2 = min(dmost[x],uplc[x])-1;
}
else {
y1 = max(umost[x],dplc[x]);
y2 = dmost[x]-1;
}
if (y1 <= y2)
{
nptr1 = (int32_t *)&slopalookup[y1+(shoffs>>15)];
nptr2 = (int32_t *)&slopalookup[y2+(shoffs>>15)];
while (nptr1 <= mptr1)
{
*mptr1-- = j + (getpalookup((long)mulscale24(krecipasm(m1),globvis),globalshade)<<8);
m1 -= l;
}
while (nptr2 >= mptr2)
{
*mptr2++ = j + (getpalookup((long)mulscale24(krecipasm(m2),globvis),globalshade)<<8);
m2 += l;
}
globalx3 = (globalx2>>10);
globaly3 = (globaly2>>10);
asm3 = mulscale16(y2,globalzd) + (globalzx>>6);
slopevlin(ylookup[y2]+x+frameoffset,krecipasm(asm3>>3),(long)nptr2,y2-y1+1,globalx1,globaly1);
if ((x&15) == 0) faketimerhandler();
}
globalx2 += globalx;
globaly2 += globaly;
globalzx += globalz;
shoffs += shinc;
}
}
static int owallmost(short *mostbuf, int32_t w, int32_t z)
{
int32_t bad, inty, xcross, y, yinc;
int32_t s1, s2, s3, s4, ix1, ix2, iy1, iy2, t;
z <<= 7;
s1 = mulscale20(globaluclip,yb1[w]);
s2 = mulscale20(globaluclip,yb2[w]);
s3 = mulscale20(globaldclip,yb1[w]);
s4 = mulscale20(globaldclip,yb2[w]);
bad = (z<s1)+((z<s2)<<1)+((z>s3)<<2)+((z>s4)<<3);
ix1 = xb1[w];
iy1 = yb1[w];
ix2 = xb2[w];
iy2 = yb2[w];
if ((bad&3) == 3)
{
clearbufbyte(&mostbuf[ix1],(ix2-ix1+1)*sizeof(mostbuf[0]),0L);
return(bad);
}
if ((bad&12) == 12)
{
clearbufbyte(&mostbuf[ix1],(ix2-ix1+1)*sizeof(mostbuf[0]),ydimen+(ydimen<<16));
return(bad);
}
if (bad&3)
{
t = divscale30(z-s1,s2-s1);
inty = yb1[w] + mulscale30(yb2[w]-yb1[w],t);
xcross = xb1[w] + scale(mulscale30(yb2[w],t),xb2[w]-xb1[w],inty);
if ((bad&3) == 2)
{
if (xb1[w] <= xcross) {
iy2 = inty;
ix2 = xcross;
}
clearbufbyte(&mostbuf[xcross+1],(xb2[w]-xcross)*sizeof(mostbuf[0]),0L);
}
else
{
if (xcross <= xb2[w]) {
iy1 = inty;
ix1 = xcross;
}
clearbufbyte(&mostbuf[xb1[w]],(xcross-xb1[w]+1)*sizeof(mostbuf[0]),0L);
}
}
if (bad&12)
{
t = divscale30(z-s3,s4-s3);
inty = yb1[w] + mulscale30(yb2[w]-yb1[w],t);
xcross = xb1[w] + scale(mulscale30(yb2[w],t),xb2[w]-xb1[w],inty);
if ((bad&12) == 8)
{
if (xb1[w] <= xcross) {
iy2 = inty;
ix2 = xcross;
}
clearbufbyte(&mostbuf[xcross+1],(xb2[w]-xcross)*sizeof(mostbuf[0]),ydimen+(ydimen<<16));
}
else
{
if (xcross <= xb2[w]) {
iy1 = inty;
ix1 = xcross;
}
clearbufbyte(&mostbuf[xb1[w]],(xcross-xb1[w]+1)*sizeof(mostbuf[0]),ydimen+(ydimen<<16));
}
}
y = (scale(z,xdimenscale,iy1)<<4);
yinc = ((scale(z,xdimenscale,iy2)<<4)-y) / (ix2-ix1+1);
qinterpolatedown16short((int32_t *)&mostbuf[ix1],ix2-ix1+1,y+(globalhoriz<<16),yinc);
if (mostbuf[ix1] < 0) mostbuf[ix1] = 0;
if (mostbuf[ix1] > ydimen) mostbuf[ix1] = ydimen;
if (mostbuf[ix2] < 0) mostbuf[ix2] = 0;
if (mostbuf[ix2] > ydimen) mostbuf[ix2] = ydimen;
return(bad);
}
static int wallmost(short *mostbuf, int32_t w, int32_t sectnum, uint8_t dastat)
{
int32_t bad, i, j, t, y, z, inty, intz, xcross, yinc, fw;
int32_t x1, y1, z1, x2, y2, z2, xv, yv, dx, dy, dasqr, oz1, oz2;
int32_t s1, s2, s3, s4, ix1, ix2, iy1, iy2;
if (dastat == 0)
{
z = sector[sectnum].ceilingz-globalposz;
if ((sector[sectnum].ceilingstat&2) == 0) return(owallmost(mostbuf,w,z));
}
else
{
z = sector[sectnum].floorz-globalposz;
if ((sector[sectnum].floorstat&2) == 0) return(owallmost(mostbuf,w,z));
}
i = thewall[w];
if (i == sector[sectnum].wallptr) return(owallmost(mostbuf,w,z));
x1 = wall[i].x;
x2 = wall[wall[i].point2].x-x1;
y1 = wall[i].y;
y2 = wall[wall[i].point2].y-y1;
fw = sector[sectnum].wallptr;
i = wall[fw].point2;
dx = wall[i].x-wall[fw].x;
dy = wall[i].y-wall[fw].y;
dasqr = krecipasm(nsqrtasm(dx*dx+dy*dy));
if (xb1[w] == 0)
{
xv = cosglobalang+sinviewingrangeglobalang;
yv = singlobalang-cosviewingrangeglobalang;
}
else
{
xv = x1-globalposx;
yv = y1-globalposy;
}
i = xv*(y1-globalposy)-yv*(x1-globalposx);
j = yv*x2-xv*y2;
if (klabs(j) > klabs(i>>3)) i = divscale28(i,j);
if (dastat == 0)
{
t = mulscale15(sector[sectnum].ceilingheinum,dasqr);
z1 = sector[sectnum].ceilingz;
}
else
{
t = mulscale15(sector[sectnum].floorheinum,dasqr);
z1 = sector[sectnum].floorz;
}
z1 = dmulscale24(dx*t,mulscale20(y2,i)+((y1-wall[fw].y)<<8),
-dy*t,mulscale20(x2,i)+((x1-wall[fw].x)<<8))+((z1-globalposz)<<7);
if (xb2[w] == xdimen-1)
{
xv = cosglobalang-sinviewingrangeglobalang;
yv = singlobalang+cosviewingrangeglobalang;
}
else
{
xv = (x2+x1)-globalposx;
yv = (y2+y1)-globalposy;
}
i = xv*(y1-globalposy)-yv*(x1-globalposx);
j = yv*x2-xv*y2;
if (klabs(j) > klabs(i>>3)) i = divscale28(i,j);
if (dastat == 0)
{
t = mulscale15(sector[sectnum].ceilingheinum,dasqr);
z2 = sector[sectnum].ceilingz;
}
else
{
t = mulscale15(sector[sectnum].floorheinum,dasqr);
z2 = sector[sectnum].floorz;
}
z2 = dmulscale24(dx*t,mulscale20(y2,i)+((y1-wall[fw].y)<<8),
-dy*t,mulscale20(x2,i)+((x1-wall[fw].x)<<8))+((z2-globalposz)<<7);
s1 = mulscale20(globaluclip,yb1[w]);
s2 = mulscale20(globaluclip,yb2[w]);
s3 = mulscale20(globaldclip,yb1[w]);
s4 = mulscale20(globaldclip,yb2[w]);
bad = (z1<s1)+((z2<s2)<<1)+((z1>s3)<<2)+((z2>s4)<<3);
ix1 = xb1[w];
ix2 = xb2[w];
iy1 = yb1[w];
iy2 = yb2[w];
oz1 = z1;
oz2 = z2;
if ((bad&3) == 3)
{
clearbufbyte(&mostbuf[ix1],(ix2-ix1+1)*sizeof(mostbuf[0]),0L);
return(bad);
}
if ((bad&12) == 12)
{
clearbufbyte(&mostbuf[ix1],(ix2-ix1+1)*sizeof(mostbuf[0]),ydimen+(ydimen<<16));
return(bad);
}
if (bad&3)
{
/* inty = intz / (globaluclip>>16) */
t = divscale30(oz1-s1,s2-s1+oz1-oz2);
inty = yb1[w] + mulscale30(yb2[w]-yb1[w],t);
intz = oz1 + mulscale30(oz2-oz1,t);
xcross = xb1[w] + scale(mulscale30(yb2[w],t),xb2[w]-xb1[w],inty);
/*
* t = divscale30((x1<<4)-xcross*yb1[w],xcross*(yb2[w]-yb1[w])-((x2-x1)<<4));
* inty = yb1[w] + mulscale30(yb2[w]-yb1[w],t);
* intz = z1 + mulscale30(z2-z1,t);
*/
if ((bad&3) == 2)
{
if (xb1[w] <= xcross) {
z2 = intz;
iy2 = inty;
ix2 = xcross;
}
clearbufbyte(&mostbuf[xcross+1],(xb2[w]-xcross)*sizeof(mostbuf[0]),0L);
}
else
{
if (xcross <= xb2[w]) {
z1 = intz;
iy1 = inty;
ix1 = xcross;
}
clearbufbyte(&mostbuf[xb1[w]],(xcross-xb1[w]+1)*sizeof(mostbuf[0]),0L);
}
}
if (bad&12)
{
/* inty = intz / (globaldclip>>16) */
t = divscale30(oz1-s3,s4-s3+oz1-oz2);
inty = yb1[w] + mulscale30(yb2[w]-yb1[w],t);
intz = oz1 + mulscale30(oz2-oz1,t);
xcross = xb1[w] + scale(mulscale30(yb2[w],t),xb2[w]-xb1[w],inty);
/*
* t = divscale30((x1<<4)-xcross*yb1[w],xcross*(yb2[w]-yb1[w])-((x2-x1)<<4));
* inty = yb1[w] + mulscale30(yb2[w]-yb1[w],t);
* intz = z1 + mulscale30(z2-z1,t);
*/
if ((bad&12) == 8)
{
if (xb1[w] <= xcross) {
z2 = intz;
iy2 = inty;
ix2 = xcross;
}
clearbufbyte(&mostbuf[xcross+1],(xb2[w]-xcross)*sizeof(mostbuf[0]),ydimen+(ydimen<<16));
}
else
{
if (xcross <= xb2[w]) {
z1 = intz;
iy1 = inty;
ix1 = xcross;
}
clearbufbyte(&mostbuf[xb1[w]],(xcross-xb1[w]+1)*sizeof(mostbuf[0]),ydimen+(ydimen<<16));
}
}
y = (scale(z1,xdimenscale,iy1)<<4);
yinc = ((scale(z2,xdimenscale,iy2)<<4)-y) / (ix2-ix1+1);
qinterpolatedown16short((int32_t *)&mostbuf[ix1],ix2-ix1+1,y+(globalhoriz<<16),yinc);
if (mostbuf[ix1] < 0) mostbuf[ix1] = 0;
if (mostbuf[ix1] > ydimen) mostbuf[ix1] = ydimen;
if (mostbuf[ix2] < 0) mostbuf[ix2] = 0;
if (mostbuf[ix2] > ydimen) mostbuf[ix2] = ydimen;
return(bad);
}
static void drawalls(int32_t bunch)
{
sectortype *sec, *nextsec;
walltype *wal;
int32_t i, x, x1, x2, cz[5], fz[5];
int32_t z, wallnum, sectnum, nextsectnum;
int32_t startsmostwallcnt, startsmostcnt, gotswall;
uint8_t andwstat1, andwstat2;
z = bunchfirst[bunch];
sectnum = thesector[z];
sec = §or[sectnum];
andwstat1 = 0xff;
andwstat2 = 0xff;
for(; z>=0; z=p2[z]) /* uplc/dplc calculation */
{
andwstat1 &= wallmost(uplc,z,sectnum,(uint8_t )0);
andwstat2 &= wallmost(dplc,z,sectnum,(uint8_t )1);
}
/* draw ceilings */
if ((andwstat1&3) != 3)
{
if ((sec->ceilingstat&3) == 2)
grouscan(xb1[bunchfirst[bunch]],xb2[bunchlast[bunch]],sectnum,0);
else if ((sec->ceilingstat&1) == 0)
ceilscan(xb1[bunchfirst[bunch]],xb2[bunchlast[bunch]],sectnum);
else
parascan(xb1[bunchfirst[bunch]],xb2[bunchlast[bunch]],sectnum,0,bunch);
}
/* draw floors */
if ((andwstat2&12) != 12)
{
if ((sec->floorstat&3) == 2)
grouscan(xb1[bunchfirst[bunch]],xb2[bunchlast[bunch]],sectnum,1);
else if ((sec->floorstat&1) == 0)
florscan(xb1[bunchfirst[bunch]],xb2[bunchlast[bunch]],sectnum);
else
parascan(xb1[bunchfirst[bunch]],xb2[bunchlast[bunch]],sectnum,1,bunch);
}
//return;
/* DRAW WALLS SECTION! */
for(z=bunchfirst[bunch]; z>=0; z=p2[z])
{
x1 = xb1[z];
x2 = xb2[z];
if (umost[x2] >= dmost[x2])
{
for(x=x1; x<x2; x++)
if (umost[x] < dmost[x])
break;
if (x >= x2)
{
smostwall[smostwallcnt] = z;
smostwalltype[smostwallcnt] = 0;
smostwallcnt++;
continue;
}
}
wallnum = thewall[z];
wal = &wall[wallnum];
nextsectnum = wal->nextsector;
nextsec = §or[nextsectnum];
gotswall = 0;
startsmostwallcnt = smostwallcnt;
startsmostcnt = smostcnt;
if ((searchit == 2) && (searchx >= x1) && (searchx <= x2))
{
if (searchy <= uplc[searchx]) /* ceiling */
{
searchsector = sectnum;
searchwall = wallnum;
searchstat = 1;
searchit = 1;
}
else if (searchy >= dplc[searchx]) /* floor */
{
searchsector = sectnum;
searchwall = wallnum;
searchstat = 2;
searchit = 1;
}
}
if (nextsectnum >= 0)
{
getzsofslope((short)sectnum,wal->x,wal->y,&cz[0],&fz[0]);
getzsofslope((short)sectnum,wall[wal->point2].x,wall[wal->point2].y,&cz[1],&fz[1]);
getzsofslope((short)nextsectnum,wal->x,wal->y,&cz[2],&fz[2]);
getzsofslope((short)nextsectnum,wall[wal->point2].x,wall[wal->point2].y,&cz[3],&fz[3]);
getzsofslope((short)nextsectnum,globalposx,globalposy,&cz[4],&fz[4]);
if ((wal->cstat&48) == 16) maskwall[maskwallcnt++] = z;
if (((sec->ceilingstat&1) == 0) || ((nextsec->ceilingstat&1) == 0))
{
if ((cz[2] <= cz[0]) && (cz[3] <= cz[1]))
{
if (globparaceilclip)
for(x=x1; x<=x2; x++)
if (uplc[x] > umost[x])
if (umost[x] <= dmost[x])
{
umost[x] = uplc[x];
if (umost[x] > dmost[x]) numhits--;
}
}
else
{
wallmost(dwall,z,nextsectnum,(uint8_t )0);
if ((cz[2] > fz[0]) || (cz[3] > fz[1]))
for(i=x1; i<=x2; i++) if (dwall[i] > dplc[i]) dwall[i] = dplc[i];
if ((searchit == 2) && (searchx >= x1) && (searchx <= x2))
if (searchy <= dwall[searchx]) /* wall */
{
searchsector = sectnum;
searchwall = wallnum;
searchstat = 0;
searchit = 1;
}
globalorientation = (long)wal->cstat;
globalpicnum = wal->picnum;
if ((unsigned)globalpicnum >= (unsigned)MAXTILES) globalpicnum = 0;
globalxpanning = (long)wal->xpanning;
globalypanning = (long)wal->ypanning;
globalshiftval = (picsiz[globalpicnum]>>4);
if (pow2long[globalshiftval] != tilesizy[globalpicnum]) globalshiftval++;
globalshiftval = 32-globalshiftval;
if (picanm[globalpicnum]&192) globalpicnum += animateoffs(globalpicnum,(short)(wallnum+16384));
globalshade = (long)wal->shade;
globvis = globalvisibility;
if (sec->visibility != 0) globvis = mulscale4(globvis,(long)((uint8_t )(sec->visibility+16)));
globalpal = (long)wal->pal;
globalyscale = (wal->yrepeat<<(globalshiftval-19));
if ((globalorientation&4) == 0)
globalzd = (((globalposz-nextsec->ceilingz)*globalyscale)<<8);
else
globalzd = (((globalposz-sec->ceilingz)*globalyscale)<<8);
globalzd += (globalypanning<<24);
if (globalorientation&256) globalyscale = -globalyscale, globalzd = -globalzd;
if (gotswall == 0) {
gotswall = 1;
prepwall(z,wal);
}
wallscan(x1,x2,uplc,dwall,swall,lwall);
if ((cz[2] >= cz[0]) && (cz[3] >= cz[1]))
{
for(x=x1; x<=x2; x++)
if (dwall[x] > umost[x])
if (umost[x] <= dmost[x])
{
umost[x] = dwall[x];
if (umost[x] > dmost[x]) numhits--;
}
}
else
{
for(x=x1; x<=x2; x++)
if (umost[x] <= dmost[x])
{
i = max(uplc[x],dwall[x]);
if (i > umost[x])
{
umost[x] = i;
if (umost[x] > dmost[x]) numhits--;
}
}
}
}
if ((cz[2] < cz[0]) || (cz[3] < cz[1]) || (globalposz < cz[4]))
{
i = x2-x1+1;
if (smostcnt+i < MAXYSAVES)
{
smoststart[smostwallcnt] = smostcnt;
smostwall[smostwallcnt] = z;
smostwalltype[smostwallcnt] = 1; /* 1 for umost */
smostwallcnt++;
copybufbyte((int32_t *)&umost[x1],(int32_t *)&smost[smostcnt],i*sizeof(smost[0]));
smostcnt += i;
}
}
}
if (((sec->floorstat&1) == 0) || ((nextsec->floorstat&1) == 0))
{
if ((fz[2] >= fz[0]) && (fz[3] >= fz[1]))
{
if (globparaflorclip)
for(x=x1; x<=x2; x++)
if (dplc[x] < dmost[x])
if (umost[x] <= dmost[x])
{
dmost[x] = dplc[x];
if (umost[x] > dmost[x]) numhits--;
}
}
else
{
wallmost(uwall,z,nextsectnum,(uint8_t )1);
if ((fz[2] < cz[0]) || (fz[3] < cz[1]))
for(i=x1; i<=x2; i++) if (uwall[i] < uplc[i]) uwall[i] = uplc[i];
if ((searchit == 2) && (searchx >= x1) && (searchx <= x2))
if (searchy >= uwall[searchx]) /* wall */
{
searchsector = sectnum;
searchwall = wallnum;
if ((wal->cstat&2) > 0) searchwall = wal->nextwall;
searchstat = 0;
searchit = 1;
}
if ((wal->cstat&2) > 0)
{
wallnum = wal->nextwall;
wal = &wall[wallnum];
globalorientation = (long)wal->cstat;
globalpicnum = wal->picnum;
if ((unsigned)globalpicnum >= (unsigned)MAXTILES) globalpicnum = 0;
globalxpanning = (long)wal->xpanning;
globalypanning = (long)wal->ypanning;
if (picanm[globalpicnum]&192) globalpicnum += animateoffs(globalpicnum,(short)(wallnum+16384));
globalshade = (long)wal->shade;
globalpal = (long)wal->pal;
wallnum = thewall[z];
wal = &wall[wallnum];
}
else
{
globalorientation = (long)wal->cstat;
globalpicnum = wal->picnum;
if ((unsigned)globalpicnum >= (unsigned)MAXTILES) globalpicnum = 0;
globalxpanning = (long)wal->xpanning;
globalypanning = (long)wal->ypanning;
if (picanm[globalpicnum]&192) globalpicnum += animateoffs(globalpicnum,(short)(wallnum+16384));
globalshade = (long)wal->shade;
globalpal = (long)wal->pal;
}
globvis = globalvisibility;
if (sec->visibility != 0) globvis = mulscale4(globvis,(long)((uint8_t )(sec->visibility+16)));
globalshiftval = (picsiz[globalpicnum]>>4);
if (pow2long[globalshiftval] != tilesizy[globalpicnum]) globalshiftval++;
globalshiftval = 32-globalshiftval;
globalyscale = (wal->yrepeat<<(globalshiftval-19));
if ((globalorientation&4) == 0)
globalzd = (((globalposz-nextsec->floorz)*globalyscale)<<8);
else
globalzd = (((globalposz-sec->ceilingz)*globalyscale)<<8);
globalzd += (globalypanning<<24);
if (globalorientation&256) globalyscale = -globalyscale, globalzd = -globalzd;
if (gotswall == 0) {
gotswall = 1;
prepwall(z,wal);
}
wallscan(x1,x2,uwall,dplc,swall,lwall);
if ((fz[2] <= fz[0]) && (fz[3] <= fz[1]))
{
for(x=x1; x<=x2; x++)
if (uwall[x] < dmost[x])
if (umost[x] <= dmost[x])
{
dmost[x] = uwall[x];
if (umost[x] > dmost[x]) numhits--;
}
}
else
{
for(x=x1; x<=x2; x++)
if (umost[x] <= dmost[x])
{
i = min(dplc[x],uwall[x]);
if (i < dmost[x])
{
dmost[x] = i;
if (umost[x] > dmost[x]) numhits--;
}
}
}
}
if ((fz[2] > fz[0]) || (fz[3] > fz[1]) || (globalposz > fz[4]))
{
i = x2-x1+1;
if (smostcnt+i < MAXYSAVES)
{
smoststart[smostwallcnt] = smostcnt;
smostwall[smostwallcnt] = z;
smostwalltype[smostwallcnt] = 2; /* 2 for dmost */
smostwallcnt++;
copybufbyte((int32_t *)&dmost[x1],(int32_t *)&smost[smostcnt],i*sizeof(smost[0]));
smostcnt += i;
}
}
}
if (numhits < 0) return;
if ((!(wal->cstat&32)) && ((gotsector[nextsectnum>>3]&pow2char[nextsectnum&7]) == 0))
{
if (umost[x2] < dmost[x2])
scansector((short) nextsectnum);
else
{
for(x=x1; x<x2; x++)
if (umost[x] < dmost[x])
{
scansector((short) nextsectnum);
break;
}
/*
* If can't see sector beyond, then cancel smost array and just
* store wall!
*/
if (x == x2)
{
smostwallcnt = startsmostwallcnt;
smostcnt = startsmostcnt;
smostwall[smostwallcnt] = z;
smostwalltype[smostwallcnt] = 0;
smostwallcnt++;
}
}
}
}
if ((nextsectnum < 0) || (wal->cstat&32)) /* White/1-way wall */
{
globalorientation = (long)wal->cstat;
if (nextsectnum < 0) globalpicnum = wal->picnum;
else globalpicnum = wal->overpicnum;
if ((unsigned)globalpicnum >= (unsigned)MAXTILES) globalpicnum = 0;
globalxpanning = (long)wal->xpanning;
globalypanning = (long)wal->ypanning;
if (picanm[globalpicnum]&192) globalpicnum += animateoffs(globalpicnum,(short)(wallnum+16384));
globalshade = (long)wal->shade;
globvis = globalvisibility;
if (sec->visibility != 0) globvis = mulscale4(globvis,(long)((uint8_t )(sec->visibility+16)));
globalpal = (long)wal->pal;
globalshiftval = (picsiz[globalpicnum]>>4);
if (pow2long[globalshiftval] != tilesizy[globalpicnum]) globalshiftval++;
globalshiftval = 32-globalshiftval;
globalyscale = (wal->yrepeat<<(globalshiftval-19));
if (nextsectnum >= 0)
{
if ((globalorientation&4) == 0) globalzd = globalposz-nextsec->ceilingz;
else globalzd = globalposz-sec->ceilingz;
}
else
{
if ((globalorientation&4) == 0) globalzd = globalposz-sec->ceilingz;
else globalzd = globalposz-sec->floorz;
}
globalzd = ((globalzd*globalyscale)<<8) + (globalypanning<<24);
if (globalorientation&256) globalyscale = -globalyscale, globalzd = -globalzd;
if (gotswall == 0) {
gotswall = 1;
prepwall(z,wal);
}
wallscan(x1,x2,uplc,dplc,swall,lwall);
for(x=x1; x<=x2; x++)
if (umost[x] <= dmost[x])
{
umost[x] = 1;
dmost[x] = 0;
numhits--;
}
smostwall[smostwallcnt] = z;
smostwalltype[smostwallcnt] = 0;
smostwallcnt++;
if ((searchit == 2) && (searchx >= x1) && (searchx <= x2))
{
searchit = 1;
searchsector = sectnum;
searchwall = wallnum;
if (nextsectnum < 0) searchstat = 0;
else searchstat = 4;
}
}
}
}
static void dosetaspect(void)
{
int32_t i, j, k, x, xinc;
if (xyaspect != oxyaspect)
{
oxyaspect = xyaspect;
j = xyaspect*320;
horizlookup2[horizycent-1] = divscale26(131072,j);
for(i=ydim*4-1; i>=0; i--)
if (i != (horizycent-1))
{
horizlookup[i] = divscale28(1,i-(horizycent-1));
horizlookup2[i] = divscale14(klabs(horizlookup[i]),j);
}
}
if ((xdimen != oxdimen) || (viewingrange != oviewingrange))
{
oxdimen = xdimen;
oviewingrange = viewingrange;
xinc = mulscale32(viewingrange*320,xdimenrecip);
x = (640<<16)-mulscale1(xinc,xdimen);
for(i=0; i<xdimen; i++)
{
j = (x&65535);
k = (x>>16);
x += xinc;
if (j != 0) j = mulscale16((long)radarang[k+1]-(long)radarang[k],j);
radarang2[i] = (short)(((long)radarang[k]+j)>>6);
}
#ifdef SUPERBUILD
for(i=1; i<16384; i++) distrecip[i] = divscale20(xdimen,i);
nytooclose = xdimen*2100;
nytoofar = 16384*16384-1048576;
#endif
}
}
//FCS: Geez one more horrible algorithm to decipher :| :/ :( cry smiley.....
int wallfront(int32_t l1, int32_t l2)
{
walltype *wal;
int32_t x11, y11, x21, y21, x12, y12, x22, y22, dx, dy, t1, t2;
wal = &wall[thewall[l1]];
x11 = wal->x;
y11 = wal->y;
wal = &wall[wal->point2];
x21 = wal->x;
y21 = wal->y;
wal = &wall[thewall[l2]];
x12 = wal->x;
y12 = wal->y;
wal = &wall[wal->point2];
x22 = wal->x;
y22 = wal->y;
dx = x21-x11;
dy = y21-y11;
t1 = dmulscale2(x12-x11,dy,-dx,y12-y11); /* p1(l2) vs. l1 */
t2 = dmulscale2(x22-x11,dy,-dx,y22-y11); /* p2(l2) vs. l1 */
if (t1 == 0) {
t1 = t2;
if (t1 == 0)
return(-1);
}
if (t2 == 0) t2 = t1;
if ((t1^t2) >= 0)
{
t2 = dmulscale2(globalposx-x11,dy,-dx,globalposy-y11); /* pos vs. l1 */
return((t2^t1) >= 0);
}
dx = x22-x12;
dy = y22-y12;
t1 = dmulscale2(x11-x12,dy,-dx,y11-y12); /* p1(l1) vs. l2 */
t2 = dmulscale2(x21-x12,dy,-dx,y21-y12); /* p2(l1) vs. l2 */
if (t1 == 0) {
t1 = t2;
if (t1 == 0) return(-1);
}
if (t2 == 0) t2 = t1;
if ((t1^t2) >= 0)
{
t2 = dmulscale2(globalposx-x12,dy,-dx,globalposy-y12); /* pos vs. l2 */
return((t2^t1) < 0);
}
return(-2);
}
//Return 1 if bunch b1 is in from of bunch b2.
static int bunchfront(int32_t b1, int32_t b2)
{
int32_t x1b1, x2b1, x1b2, x2b2, b1f, b2f, i;
b1f = bunchfirst[b1];
x1b1 = xb1[b1f];
x2b2 = xb2[bunchlast[b2]]+1;
if (x1b1 >= x2b2)
return(-1);
b2f = bunchfirst[b2];
x1b2 = xb1[b2f];
x2b1 = xb2[bunchlast[b1]]+1;
if (x1b2 >= x2b1) return(-1);
if (x1b1 >= x1b2)
{
for(i=b2f; xb2[i]<x1b1; i=p2[i]);
return(wallfront(b1f,i));
}
for(i=b1f; xb2[i]<x1b2; i=p2[i]);
return(wallfront(i,b2f));
}
int pixelRenderable = 100000000;
void drawrooms(int32_t daposx, int32_t daposy, int32_t daposz,
short daang, int32_t dahoriz, short dacursectnum)
{
int32_t i, j, z, cz, fz, closest;
short *shortptr1, *shortptr2;
// When visualizing the rendering process, part of the screen
// are not updated: In order to avoid the "ghost effect", we
// clear the framebuffer to black.
if (CLEAR_FRAMEBUFFER)
clear2dscreen();
pixelRenderable+=10;
if (pixelRenderable >= MAX_PIXEL_RENDERERED)
pixelRenderable = 0 ;
//pixelsAllowed = pixelRenderable;
pixelsAllowed = 100000000;
printf("%d\n",pixelsAllowed);
beforedrawrooms = 0;
totalarea += (windowx2+1-windowx1)*(windowy2+1-windowy1);
globalposx = daposx;
globalposy = daposy;
globalposz = daposz;
globalang = (daang&2047);
globalhoriz = mulscale16(dahoriz-100,xdimenscale)+(ydimen>>1);
globaluclip = (0-globalhoriz)*xdimscale;
globaldclip = (ydimen-globalhoriz)*xdimscale;
i = mulscale16(xdimenscale,viewingrangerecip);
globalpisibility = mulscale16(parallaxvisibility,i);
globalvisibility = mulscale16(visibility,i);
globalhisibility = mulscale16(globalvisibility,xyaspect);
globalcisibility = mulscale8(globalhisibility,320);
globalcursectnum = dacursectnum;
totalclocklock = totalclock;
cosglobalang = sintable[(globalang+512)&2047];
singlobalang = sintable[globalang&2047];
cosviewingrangeglobalang = mulscale16(cosglobalang,viewingrange);
sinviewingrangeglobalang = mulscale16(singlobalang,viewingrange);
if ((stereomode != 0) || (vidoption == 6))
{
if (stereopixelwidth != ostereopixelwidth)
{
ostereopixelwidth = stereopixelwidth;
xdimen = (windowx2-windowx1+1)+(stereopixelwidth<<1);
halfxdimen = (xdimen>>1);
xdimenrecip = divscale32(1L,xdimen);
setaspect((long)divscale16(xdimen,windowx2-windowx1+1),yxaspect);
}
if ((!(activepage&1)) ^ inpreparemirror)
{
for(i=windowx1; i<windowx1+(stereopixelwidth<<1); i++) {
startumost[i] = 1, startdmost[i] = 0;
}
for(; i<windowx2+1+(stereopixelwidth<<1); i++) {
startumost[i] = windowy1, startdmost[i] = windowy2+1;
}
viewoffset = windowy1*bytesperline+windowx1-(stereopixelwidth<<1);
i = stereowidth;
}
else
{
for(i=windowx1; i<windowx2+1; i++) {
startumost[i] = windowy1, startdmost[i] = windowy2+1;
}
for(; i<windowx2+1+(stereopixelwidth<<1); i++) {
startumost[i] = 1, startdmost[i] = 0;
}
viewoffset = windowy1*bytesperline+windowx1;
i = -stereowidth;
}
globalposx += mulscale24(singlobalang,i);
globalposy -= mulscale24(cosglobalang,i);
if (vidoption == 6) frameplace = (long)FP_OFF(screen)+(activepage&1)*65536;
}
if ((xyaspect != oxyaspect) || (xdimen != oxdimen) || (viewingrange != oviewingrange))
dosetaspect();
frameoffset = frameplace+viewoffset;
clearbufbyte(&gotsector[0],(long)((numsectors+7)>>3),0L);
shortptr1 = (short *)&startumost[windowx1];
shortptr2 = (short *)&startdmost[windowx1];
i = xdimen-1;
do
{
umost[i] = shortptr1[i]-windowy1;
dmost[i] = shortptr2[i]-windowy1;
i--;
} while (i != 0);
umost[0] = shortptr1[0]-windowy1;
dmost[0] = shortptr2[0]-windowy1;
/*
* every cycle counts...and the CRC gets checked at the start, so this only
* would trigger only if they've changed it in memory after loading (and what
* would anyone do that for on purpose?), or if they've just defeated the
* first CRC check...but if they've hacked the binary/source in that way,
* then they'll just take this check out, too. In short, it ain't worth it.
*
* --ryan.
*/
#if 0
if (smostwallcnt < 0)
if (getkensmessagecrc(FP_OFF(kensmessage)) != 0x56c764d4)
{
setvmode(0x3);
printf("Nice try.\n");
Error(EXIT_SUCCESS, "");
}
#endif
numhits = xdimen;
numscans = 0;
numbunches = 0;
maskwallcnt = 0;
smostwallcnt = 0;
smostcnt = 0;
spritesortcnt = 0;
if (globalcursectnum >= MAXSECTORS)
globalcursectnum -= MAXSECTORS;
else
{
i = globalcursectnum;
updatesector(globalposx,globalposy,&globalcursectnum);
if (globalcursectnum < 0) globalcursectnum = i;
}
globparaceilclip = 1;
globparaflorclip = 1;
getzsofslope(globalcursectnum,globalposx,globalposy,&cz,&fz);
if (globalposz < cz) globparaceilclip = 0;
if (globalposz > fz) globparaflorclip = 0;
scansector(globalcursectnum);
if (inpreparemirror)
{
inpreparemirror = 0;
mirrorsx1 = xdimen-1;
mirrorsx2 = 0;
for(i=numscans-1; i>=0; i--)
{
if (wall[thewall[i]].nextsector < 0) continue;
if (xb1[i] < mirrorsx1) mirrorsx1 = xb1[i];
if (xb2[i] > mirrorsx2) mirrorsx2 = xb2[i];
}
if (stereomode)
{
mirrorsx1 += (stereopixelwidth<<1);
mirrorsx2 += (stereopixelwidth<<1);
}
for(i=0; i<mirrorsx1; i++)
if (umost[i] <= dmost[i])
{
umost[i] = 1;
dmost[i] = 0;
numhits--;
}
for(i=mirrorsx2+1; i<xdimen; i++)
if (umost[i] <= dmost[i])
{
umost[i] = 1;
dmost[i] = 0;
numhits--;
}
drawalls(0L);
numbunches--;
bunchfirst[0] = bunchfirst[numbunches];
bunchlast[0] = bunchlast[numbunches];
mirrorsy1 = min(umost[mirrorsx1],umost[mirrorsx2]);
mirrorsy2 = max(dmost[mirrorsx1],dmost[mirrorsx2]);
}
// Scan sector has generated bunches, it is not time to see which one to render.
// numhits is the number of column to draw (if the screen is 320x200) then numhits starts at 200.
// Due to rounding error, not all column may be drawn so an additional stop condition is here:
// When every bunches have been tested for rendition.
while ((numbunches > 0) && (numhits > 0))
{
// tempbuf is used to mark which bunches have been elected as "closest".
// if tempbug[x] == 1 then it should be discarded.
clearbuf(&tempbuf[0],(long)((numbunches+3)>>2),0L);
tempbuf[0] = 1;
closest = 0; /* Almost works, but not quite :( */
for(i=1; i<numbunches; i++)
{
if ((j = bunchfront(i,closest)) < 0) continue;
tempbuf[i] = 1;
if (j == 0) tempbuf[closest] = 1, closest = i;
}
for(i=0; i<numbunches; i++) /* Double-check */
{
if (tempbuf[i]) continue;
if ((j = bunchfront(i,closest)) < 0) continue;
tempbuf[i] = 1;
if (j == 0) tempbuf[closest] = 1, closest = i, i = 0;
}
//Draw every solid walls with ceiling/floor in the bunch "closest"
drawalls(closest);
if (automapping)
{
for(z=bunchfirst[closest]; z>=0; z=p2[z])
show2dwall[thewall[z]>>3] |= pow2char[thewall[z]&7];
}
//Since we just rendered a bunch, lower the current stack element
numbunches--;
//...and move the bunch at the top of the stack so we won't iterate on it again...
bunchfirst[closest] = bunchfirst[numbunches];
bunchlast[closest] = bunchlast[numbunches];
}
}
static int spritewallfront (spritetype *s, int32_t w)
{
walltype *wal;
int32_t x1, y1;
wal = &wall[w];
x1 = wal->x;
y1 = wal->y;
wal = &wall[wal->point2];
return (dmulscale32(wal->x-x1,s->y-y1,-(s->x-x1),wal->y-y1) >= 0);
}
static void transmaskvline(int32_t x)
{
int32_t vplc, vinc, p, i, palookupoffs, bufplc;
short y1v, y2v;
if ((x < 0) || (x >= xdimen)) return;
y1v = max(uwall[x],startumost[x+windowx1]-windowy1);
y2v = min(dwall[x],startdmost[x+windowx1]-windowy1);
y2v--;
if (y2v < y1v) return;
palookupoffs = (long)FP_OFF(palookup[globalpal]) + (getpalookup((long)mulscale16(swall[x],globvis),globalshade)<<8);
vinc = swall[x]*globalyscale;
vplc = globalzd + vinc*(y1v-globalhoriz+1);
i = lwall[x]+globalxpanning;
if (i >= tilesizx[globalpicnum]) i %= tilesizx[globalpicnum];
bufplc = waloff[globalpicnum]+i*tilesizy[globalpicnum];
p = ylookup[y1v]+x+frameoffset;
tvlineasm1(vinc,palookupoffs,y2v-y1v,vplc,bufplc,p);
transarea += y2v-y1v;
}
static void transmaskvline2 (int32_t x)
{
int32_t i, y1, y2, x2;
short y1ve[2], y2ve[2];
if ((x < 0) || (x >= xdimen)) return;
if (x == xdimen-1) {
transmaskvline(x);
return;
}
x2 = x+1;
y1ve[0] = max(uwall[x],startumost[x+windowx1]-windowy1);
y2ve[0] = min(dwall[x],startdmost[x+windowx1]-windowy1)-1;
if (y2ve[0] < y1ve[0]) {
transmaskvline(x2);
return;
}
y1ve[1] = max(uwall[x2],startumost[x2+windowx1]-windowy1);
y2ve[1] = min(dwall[x2],startdmost[x2+windowx1]-windowy1)-1;
if (y2ve[1] < y1ve[1]) {
transmaskvline(x);
return;
}
palookupoffse[0] = (long)FP_OFF(palookup[globalpal]) + (getpalookup((long)mulscale16(swall[x],globvis),globalshade)<<8);
palookupoffse[1] = (long)FP_OFF(palookup[globalpal]) + (getpalookup((long)mulscale16(swall[x2],globvis),globalshade)<<8);
setuptvlineasm2(globalshiftval,palookupoffse[0],palookupoffse[1]);
vince[0] = swall[x]*globalyscale;
vince[1] = swall[x2]*globalyscale;
vplce[0] = globalzd + vince[0]*(y1ve[0]-globalhoriz+1);
vplce[1] = globalzd + vince[1]*(y1ve[1]-globalhoriz+1);
i = lwall[x] + globalxpanning;
if (i >= tilesizx[globalpicnum]) i %= tilesizx[globalpicnum];
bufplce[0] = waloff[globalpicnum]+i*tilesizy[globalpicnum];
i = lwall[x2] + globalxpanning;
if (i >= tilesizx[globalpicnum]) i %= tilesizx[globalpicnum];
bufplce[1] = waloff[globalpicnum]+i*tilesizy[globalpicnum];
y1 = max(y1ve[0],y1ve[1]);
y2 = min(y2ve[0],y2ve[1]);
i = x+frameoffset;
if (y1ve[0] != y1ve[1])
{
if (y1ve[0] < y1)
vplce[0] = tvlineasm1(vince[0],palookupoffse[0],y1-y1ve[0]-1,vplce[0],bufplce[0],ylookup[y1ve[0]]+i);
else
vplce[1] = tvlineasm1(vince[1],palookupoffse[1],y1-y1ve[1]-1,vplce[1],bufplce[1],ylookup[y1ve[1]]+i+1);
}
if (y2 > y1)
{
asm1 = vince[1];
asm2 = ylookup[y2]+i+1;
tvlineasm2(vplce[1],vince[0],bufplce[0],bufplce[1],vplce[0],ylookup[y1]+i);
transarea += ((y2-y1)<<1);
}
else
{
asm1 = vplce[0];
asm2 = vplce[1];
}
if (y2ve[0] > y2ve[1])
tvlineasm1(vince[0],palookupoffse[0],y2ve[0]-y2-1,asm1,bufplce[0],ylookup[y2+1]+i);
else if (y2ve[0] < y2ve[1])
tvlineasm1(vince[1],palookupoffse[1],y2ve[1]-y2-1,asm2,bufplce[1],ylookup[y2+1]+i+1);
faketimerhandler();
}
static void transmaskwallscan(int32_t x1, int32_t x2)
{
int32_t x;
setgotpic(globalpicnum);
if ((tilesizx[globalpicnum] <= 0) || (tilesizy[globalpicnum] <= 0)) return;
if (waloff[globalpicnum] == 0) loadtile(globalpicnum);
setuptvlineasm(globalshiftval);
x = x1;
while ((startumost[x+windowx1] > startdmost[x+windowx1]) && (x <= x2)) x++;
if ((x <= x2) && (x&1)) transmaskvline(x), x++;
while (x < x2) transmaskvline2(x), x += 2;
while (x <= x2) transmaskvline(x), x++;
faketimerhandler();
}
int loadboard(char *filename, int32_t *daposx, int32_t *daposy,
int32_t *daposz, short *daang, short *dacursectnum)
{
int x;
short fil, i, numsprites;
sectortype *sect;
spritetype *s;
walltype *w;
x = 0;
// FIX_00058: Save/load game crash in both single and multiplayer
// We have to reset those arrays since the same
// arrays are used as temporary space in the
// compilecons() function like "label = (uint8_t *)&sprite[0];"
// to save memory space I guess.
// Not reseting the array will leave dumps fooling
// the function saveplayer(), eg at if(actorscrptr[PN] == 0)
// where PN is sprite[i].picnum was beyong actorscrptr[] size)
memset(sprite, 0, sizeof(sprite));
memset(sector, 0, sizeof(sector));
memset(wall, 0, sizeof(wall));
if ((fil = kopen4load(filename, 0)) == -1)
{
mapversion = 7L;
return(-1);
}
kread32(fil,&mapversion);
if (mapversion != 7L) return(-1);
initspritelists();
clearbuf(&show2dsector[0],(long)((MAXSECTORS+3)>>5),0L);
clearbuf(&show2dsprite[0],(long)((MAXSPRITES+3)>>5),0L);
clearbuf(&show2dwall[0],(long)((MAXWALLS+3)>>5),0L);
kread32(fil,daposx);
kread32(fil,daposy);
kread32(fil,daposz);
kread16(fil,daang);
kread16(fil,dacursectnum);
kread16(fil,&numsectors);
for (x = 0, sect = §or[0]; x < numsectors; x++, sect++)
{
kread16(fil,§->wallptr);
kread16(fil,§->wallnum);
kread32(fil,§->ceilingz);
kread32(fil,§->floorz);
kread16(fil,§->ceilingstat);
kread16(fil,§->floorstat);
kread16(fil,§->ceilingpicnum);
kread16(fil,§->ceilingheinum);
kread8(fil,(uint8_t *)§->ceilingshade);
kread8(fil,(uint8_t *)§->ceilingpal);
kread8(fil,(uint8_t *)§->ceilingxpanning);
kread8(fil,(uint8_t *)§->ceilingypanning);
kread16(fil,§->floorpicnum);
kread16(fil,§->floorheinum);
kread8(fil,(uint8_t *)§->floorshade);
kread8(fil,(uint8_t *)§->floorpal);
kread8(fil,(uint8_t *)§->floorxpanning);
kread8(fil,(uint8_t *)§->floorypanning);
kread8(fil,(uint8_t *)§->visibility);
kread8(fil,(uint8_t *)§->filler);
kread16(fil,§->lotag);
kread16(fil,§->hitag);
kread16(fil,§->extra);
}
kread16(fil,&numwalls);
for (x = 0, w = &wall[0]; x < numwalls; x++, w++)
{
kread32(fil,&w->x);
kread32(fil,&w->y);
kread16(fil,&w->point2);
kread16(fil,&w->nextwall);
kread16(fil,&w->nextsector);
kread16(fil,&w->cstat);
kread16(fil,&w->picnum);
kread16(fil,&w->overpicnum);
kread8(fil,(uint8_t *)&w->shade);
kread8(fil,&w->pal);
kread8(fil,&w->xrepeat);
kread8(fil,&w->yrepeat);
kread8(fil,&w->xpanning);
kread8(fil,&w->ypanning);
kread16(fil,&w->lotag);
kread16(fil,&w->hitag);
kread16(fil,&w->extra);
}
kread16(fil,&numsprites);
for (x = 0, s = &sprite[0]; x < numsprites; x++, s++)
{
kread32(fil,&s->x);
kread32(fil,&s->y);
kread32(fil,&s->z);
kread16(fil,&s->cstat);
kread16(fil,&s->picnum);
kread8(fil,(uint8_t *)&s->shade);
kread8(fil,(uint8_t *)&s->pal);
kread8(fil,(uint8_t *)&s->clipdist);
kread8(fil,(uint8_t *)&s->filler);
kread8(fil,(uint8_t *)&s->xrepeat);
kread8(fil,(uint8_t *)&s->yrepeat);
kread8(fil,(uint8_t *)&s->xoffset);
kread8(fil,(uint8_t *)&s->yoffset);
kread16(fil,&s->sectnum);
kread16(fil,&s->statnum);
kread16(fil,&s->ang);
kread16(fil,&s->owner);
kread16(fil,&s->xvel);
kread16(fil,&s->yvel);
kread16(fil,&s->zvel);
kread16(fil,&s->lotag);
kread16(fil,&s->hitag);
kread16(fil,&s->extra);
}
for(i=0; i<numsprites; i++)
insertsprite(sprite[i].sectnum,sprite[i].statnum);
/* Must be after loading sectors, etc! */
updatesector(*daposx,*daposy,dacursectnum);
kclose(fil);
// FIX_00009: Show map CRC and GRP file version of each player in case of Out Of Synch
mapCRC = crc16((uint8_t *)sector, numsectors*sizeof(sectortype));
mapCRC += crc16((uint8_t *)wall, numwalls*sizeof(walltype));
mapCRC += crc16((uint8_t *)sprite, numsprites*sizeof(spritetype));
return(0);
}
static void write32(int f, int32_t val)
{
val = BUILDSWAP_INTEL32(val);
write(f, &val, 4);
}
static void write16(int f, short val)
{
val = BUILDSWAP_INTEL16(val);
write(f, &val, 2);
}
static void write8(int f, uint8_t val)
{
write(f, &val, 1);
}
int saveboard(char *filename, int32_t *daposx, int32_t *daposy,
int32_t *daposz, short *daang, short *dacursectnum)
{
int fil;
int x;
short i, j, numsprites;
int permissions = 0;
walltype *w;
sectortype *sect;
#if ((defined PLATFORM_DOS) || (defined PLATFORM_WIN32))
permissions = S_IWRITE;
#elif (defined PLATFORM_UNIX)
permissions = S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH;
#endif
if ((fil = open(filename,
O_BINARY|O_TRUNC|O_CREAT|O_WRONLY,
permissions)) == -1)
{
return(-1);
}
write32(fil,mapversion);
write32(fil,*daposx);
write32(fil,*daposy);
write32(fil,*daposz);
write16(fil,*daang);
write16(fil,*dacursectnum);
write16(fil,numsectors);
for (x = 0, sect = §or[0]; x < numsectors; x++, sect++)
{
write16(fil,sect->wallptr);
write16(fil,sect->wallnum);
write32(fil,sect->ceilingz);
write32(fil,sect->floorz);
write16(fil,sect->ceilingstat);
write16(fil,sect->floorstat);
write16(fil,sect->ceilingpicnum);
write16(fil,sect->ceilingheinum);
write8(fil,sect->ceilingshade);
write8(fil,sect->ceilingpal);
write8(fil,sect->ceilingxpanning);
write8(fil,sect->ceilingypanning);
write16(fil,sect->floorpicnum);
write16(fil,sect->floorheinum);
write8(fil,sect->floorshade);
write8(fil,sect->floorpal);
write8(fil,sect->floorxpanning);
write8(fil,sect->floorypanning);
write8(fil,sect->visibility);
write8(fil,sect->filler);
write16(fil,sect->lotag);
write16(fil,sect->hitag);
write16(fil,sect->extra);
}
write16(fil,numwalls);
for (x = 0, w = &wall[0]; x < numwalls; x++, w++)
{
write32(fil,w->x);
write32(fil,w->y);
write16(fil,w->point2);
write16(fil,w->nextwall);
write16(fil,w->nextsector);
write16(fil,w->cstat);
write16(fil,w->picnum);
write16(fil,w->overpicnum);
write8(fil,w->shade);
write8(fil,w->pal);
write8(fil,w->xrepeat);
write8(fil,w->yrepeat);
write8(fil,w->xpanning);
write8(fil,w->ypanning);
write16(fil,w->lotag);
write16(fil,w->hitag);
write16(fil,w->extra);
}
numsprites = 0;
for(j=0; j<MAXSTATUS; j++)
{
i = headspritestat[j];
while (i != -1)
{
numsprites++;
i = nextspritestat[i];
}
}
write16(fil,numsprites);
for(j=0; j<MAXSTATUS; j++)
{
i = headspritestat[j];
while (i != -1)
{
spritetype *s = &sprite[i];
write32(fil,s->x);
write32(fil,s->y);
write32(fil,s->z);
write16(fil,s->cstat);
write16(fil,s->picnum);
write8(fil,s->shade);
write8(fil,s->pal);
write8(fil,s->clipdist);
write8(fil,s->filler);
write8(fil,s->xrepeat);
write8(fil,s->yrepeat);
write8(fil,s->xoffset);
write8(fil,s->yoffset);
write16(fil,s->sectnum);
write16(fil,s->statnum);
write16(fil,s->ang);
write16(fil,s->owner);
write16(fil,s->xvel);
write16(fil,s->yvel);
write16(fil,s->zvel);
write16(fil,s->lotag);
write16(fil,s->hitag);
write16(fil,s->extra);
i = nextspritestat[i];
}
}
close(fil);
return(0);
}
static void initksqrt(void)
{
int32_t i, j, k;
j = 1;
k = 0;
for(i=0; i<4096; i++)
{
if (i >= j) {
j <<= 2;
k++;
}
sqrtable[i] = (unsigned short)(msqrtasm((i<<18)+131072)<<1);
shlookup[i] = (k<<1)+((10-k)<<8);
if (i < 256) shlookup[i+4096] = ((k+6)<<1)+((10-(k+6))<<8);
}
}
static void loadtables(void)
{
int32_t i, fil;
if (tablesloaded == 0)
{
initksqrt();
for(i=0; i<2048; i++) reciptable[i] = divscale30(2048L,i+2048);
if ((fil = TCkopen4load("tables.dat",0)) != -1)
{
for (i = 0; i < 2048; i++)
kread16(fil,&sintable[i]);
for (i = 0; i < 640; i++)
kread16(fil,&radarang[i]);
for(i=0; i<640; i++) radarang[1279-i] = -radarang[i];
kread(fil,textfont,1024);
kread(fil,smalltextfont,1024);
kread(fil,britable,1024);
kclose(fil);
}
tablesloaded = 1;
}
}
static void initfastcolorlookup(int32_t rscale, int32_t gscale, int32_t bscale)
{
int32_t i, j, x, y, z;
uint8_t *pal1;
j = 0;
for(i=64; i>=0; i--)
{
/*j = (i-64)*(i-64);*/
rdist[i] = rdist[128-i] = j*rscale;
gdist[i] = gdist[128-i] = j*gscale;
bdist[i] = bdist[128-i] = j*bscale;
j += 129-(i<<1);
}
clearbufbyte((void *)FP_OFF(colhere),sizeof(colhere),0L);
clearbufbyte((void *)FP_OFF(colhead),sizeof(colhead),0L);
pal1 = (uint8_t *)&palette[768-3];
for(i=255; i>=0; i--,pal1-=3)
{
j = (pal1[0]>>3)*FASTPALGRIDSIZ*FASTPALGRIDSIZ+(pal1[1]>>3)*FASTPALGRIDSIZ+(pal1[2]>>3)+FASTPALGRIDSIZ*FASTPALGRIDSIZ+FASTPALGRIDSIZ+1;
if (colhere[j>>3]&pow2char[j&7]) colnext[i] = colhead[j];
else colnext[i] = -1;
colhead[j] = i;
colhere[j>>3] |= pow2char[j&7];
}
i = 0;
for(x=-FASTPALGRIDSIZ*FASTPALGRIDSIZ; x<=FASTPALGRIDSIZ*FASTPALGRIDSIZ; x+=FASTPALGRIDSIZ*FASTPALGRIDSIZ)
for(y=-FASTPALGRIDSIZ; y<=FASTPALGRIDSIZ; y+=FASTPALGRIDSIZ)
for(z=-1; z<=1; z++)
colscan[i++] = x+y+z;
i = colscan[13];
colscan[13] = colscan[26];
colscan[26] = i;
}
static void loadpalette(void)
{
int32_t i, j, k, dist, fil;
uint8_t *ptr;
if (paletteloaded != 0) return;
if ((fil = TCkopen4load("palette.dat",0)) == -1) return;
kread(fil,palette,768);
kread16(fil,&numpalookups);
if ((palookup[0] = (uint8_t *)kkmalloc(numpalookups<<8)) == NULL)
allocache((int32_t *)&palookup[0],numpalookups<<8,&permanentlock);
if ((transluc = (uint8_t *)kkmalloc(65536L)) == NULL)
allocache((int32_t *)&transluc,65536,&permanentlock);
globalpalwritten = palookup[0];
globalpal = 0;
setpalookupaddress(globalpalwritten);
fixtransluscence((long)FP_OFF(transluc));
kread(fil,palookup[globalpal],numpalookups<<8);
/*kread(fil,transluc,65536);*/
for (k = 0; k < (65536 / 4); k++)
kread32(fil, ((int32_t *) transluc) + k);
kclose(fil);
initfastcolorlookup(30L,59L,11L);
paletteloaded = 1;
if (vidoption == 6)
{
for(k=0; k<MAXPALOOKUPS; k++)
if (palookup[k] != NULL)
for(i=0; i<256; i++)
{
dist = palette[i*3]*3+palette[i*3+1]*5+palette[i*3+2]*2;
ptr = (uint8_t *)(FP_OFF(palookup[k])+i);
for(j=0; j<32; j++)
ptr[j<<8] = (uint8_t )min(max(mulscale10(dist,32-j),0),15);
}
if (transluc != NULL)
{
for(i=0; i<16; i++)
for(j=0; j<16; j++)
transluc[(i<<8)+j] = ((i+j+1)>>1);
}
}
}
int setgamemode(uint8_t davidoption, int32_t daxdim, int32_t daydim)
{
strcpy(kensmessage,"!!!! BUILD engine&tools programmed by Ken Silverman of E.G. RI. (c) Copyright 1995 Ken Silverman. Summary: BUILD = Ken. !!!!");
if (getkensmessagecrc(FP_OFF(kensmessage)) != 0x56c764d4)
{
setvmode(0x3);
printf("Nice try.\n");
Error(EXIT_SUCCESS, "");
}
return(_setgamemode(davidoption, daxdim, daydim));
}
static int initengine_called = 0;
void initengine(void)
{
int32_t i;
initengine_called = 1;
loadtables();
xyaspect = -1;
pskyoff[0] = 0;
pskybits = 0;
parallaxtype = 2;
parallaxyoffs = 0L;
parallaxyscale = 65536;
showinvisibility = 0;
paletteloaded = 0;
searchit = 0;
searchstat = -1;
for(i=0; i<MAXPALOOKUPS; i++) palookup[i] = NULL;
clearbuf(&waloff[0],(long)MAXTILES,0L);
clearbuf(&show2dsector[0],(long)((MAXSECTORS+3)>>5),0L);
clearbuf(&show2dsprite[0],(long)((MAXSPRITES+3)>>5),0L);
clearbuf(&show2dwall[0],(long)((MAXWALLS+3)>>5),0L);
automapping = 0;
validmodecnt = 0;
pointhighlight = -1;
linehighlight = -1;
highlightcnt = 0;
totalclock = 0;
visibility = 512;
parallaxvisibility = 512;
loadpalette();
}
void uninitengine(void)
{
if (transluc != NULL) {
kkfree(transluc);
transluc = NULL;
}
if (pic != NULL) {
kkfree(pic);
pic = NULL;
}
if (artfil != -1) kclose(artfil);
_uninitengine(); /* video driver specific. */
}
/* Assume npoints=4 with polygon on &rx1,&ry1 */
static int clippoly4(int32_t cx1, int32_t cy1, int32_t cx2, int32_t cy2)
{
int32_t n, nn, z, zz, x, x1, x2, y, y1, y2, t;
nn = 0;
z = 0;
do
{
zz = ((z+1)&3);
x1 = rx1[z];
x2 = rx1[zz]-x1;
if ((cx1 <= x1) && (x1 <= cx2))
rx2[nn] = x1, ry2[nn] = ry1[z], nn++;
if (x2 <= 0) x = cx2;
else x = cx1;
t = x-x1;
if (((t-x2)^t) < 0)
rx2[nn] = x, ry2[nn] = ry1[z]+scale(t,ry1[zz]-ry1[z],x2), nn++;
if (x2 <= 0) x = cx1;
else x = cx2;
t = x-x1;
if (((t-x2)^t) < 0)
rx2[nn] = x, ry2[nn] = ry1[z]+scale(t,ry1[zz]-ry1[z],x2), nn++;
z = zz;
} while (z != 0);
if (nn < 3) return(0);
n = 0;
z = 0;
do
{
zz = z+1;
if (zz == nn) zz = 0;
y1 = ry2[z];
y2 = ry2[zz]-y1;
if ((cy1 <= y1) && (y1 <= cy2))
ry1[n] = y1, rx1[n] = rx2[z], n++;
if (y2 <= 0) y = cy2;
else y = cy1;
t = y-y1;
if (((t-y2)^t) < 0)
ry1[n] = y, rx1[n] = rx2[z]+scale(t,rx2[zz]-rx2[z],y2), n++;
if (y2 <= 0) y = cy1;
else y = cy2;
t = y-y1;
if (((t-y2)^t) < 0)
ry1[n] = y, rx1[n] = rx2[z]+scale(t,rx2[zz]-rx2[z],y2), n++;
z = zz;
} while (z != 0);
return(n);
}
static void dorotatesprite (int32_t sx, int32_t sy, int32_t z, short a, short picnum,
int8_t dashade, uint8_t dapalnum, uint8_t dastat, int32_t cx1,
int32_t cy1, int32_t cx2, int32_t cy2)
{
int32_t cosang, sinang, v, nextv, dax1, dax2, oy, bx, by, ny1, ny2;
int32_t i, x, y, x1, y1, x2, y2, gx1, gy1, p, bufplc, palookupoffs;
int32_t xsiz, ysiz, xoff, yoff, npoints, yplc, yinc, lx, rx, xx, xend;
int32_t xv, yv, xv2, yv2, obuffermode=0, qlinemode=0, y1ve[4], y2ve[4], u4, d4;
uint8_t bad;
xsiz = tilesizx[picnum];
ysiz = tilesizy[picnum];
if (dastat&16) {
xoff = 0;
yoff = 0;
}
else
{
xoff = (int32_t)((int8_t )((picanm[picnum]>>8)&255))+(xsiz>>1);
yoff = (int32_t)((int8_t )((picanm[picnum]>>16)&255))+(ysiz>>1);
}
if (dastat&4) yoff = ysiz-yoff;
cosang = sintable[(a+512)&2047];
sinang = sintable[a&2047];
if ((dastat&2) != 0) /* Auto window size scaling */
{
if ((dastat&8) == 0)
{
x = xdimenscale; /* = scale(xdimen,yxaspect,320); */
if (stereomode) x = scale(windowx2-windowx1+1,yxaspect,320);
sx = ((cx1+cx2+2)<<15)+scale(sx-(320<<15),xdimen,320);
sy = ((cy1+cy2+2)<<15)+mulscale16(sy-(200<<15),x);
}
else
{
/*
* If not clipping to startmosts, & auto-scaling on, as a
* hard-coded bonus, scale to full screen instead
*/
x = scale(xdim,yxaspect,320);
sx = (xdim<<15)+32768+scale(sx-(320<<15),xdim,320);
sy = (ydim<<15)+32768+mulscale16(sy-(200<<15),x);
}
z = mulscale16(z,x);
}
xv = mulscale14(cosang,z);
yv = mulscale14(sinang,z);
if (((dastat&2) != 0) || ((dastat&8) == 0)) /* Don't aspect unscaled perms */
{
xv2 = mulscale16(xv,xyaspect);
yv2 = mulscale16(yv,xyaspect);
}
else
{
xv2 = xv;
yv2 = yv;
}
ry1[0] = sy - (yv*xoff + xv*yoff);
ry1[1] = ry1[0] + yv*xsiz;
ry1[3] = ry1[0] + xv*ysiz;
ry1[2] = ry1[1]+ry1[3]-ry1[0];
i = (cy1<<16);
if ((ry1[0]<i) && (ry1[1]<i) && (ry1[2]<i) && (ry1[3]<i)) return;
i = (cy2<<16);
if ((ry1[0]>i) && (ry1[1]>i) && (ry1[2]>i) && (ry1[3]>i)) return;
rx1[0] = sx - (xv2*xoff - yv2*yoff);
rx1[1] = rx1[0] + xv2*xsiz;
rx1[3] = rx1[0] - yv2*ysiz;
rx1[2] = rx1[1]+rx1[3]-rx1[0];
i = (cx1<<16);
if ((rx1[0]<i) && (rx1[1]<i) && (rx1[2]<i) && (rx1[3]<i)) return;
i = (cx2<<16);
if ((rx1[0]>i) && (rx1[1]>i) && (rx1[2]>i) && (rx1[3]>i)) return;
gx1 = rx1[0];
gy1 = ry1[0]; /* back up these before clipping */
if ((npoints = clippoly4(cx1<<16,cy1<<16,(cx2+1)<<16,(cy2+1)<<16)) < 3) return;
lx = rx1[0];
rx = rx1[0];
nextv = 0;
for(v=npoints-1; v>=0; v--)
{
x1 = rx1[v];
x2 = rx1[nextv];
dax1 = (x1>>16);
if (x1 < lx) lx = x1;
dax2 = (x2>>16);
if (x1 > rx) rx = x1;
if (dax1 != dax2)
{
y1 = ry1[v];
y2 = ry1[nextv];
yinc = divscale16(y2-y1,x2-x1);
if (dax2 > dax1)
{
yplc = y1 + mulscale16((dax1<<16)+65535-x1,yinc);
qinterpolatedown16short((int32_t *)(&uplc[dax1]),dax2-dax1,yplc,yinc);
}
else
{
yplc = y2 + mulscale16((dax2<<16)+65535-x2,yinc);
qinterpolatedown16short((int32_t *)(&dplc[dax2]),dax1-dax2,yplc,yinc);
}
}
nextv = v;
}
if (waloff[picnum] == 0) loadtile(picnum);
setgotpic(picnum);
bufplc = waloff[picnum];
palookupoffs = (long) FP_OFF(palookup[dapalnum]) + (getpalookup(0L,(long)dashade)<<8);
i = divscale32(1L,z);
xv = mulscale14(sinang,i);
yv = mulscale14(cosang,i);
if (((dastat&2) != 0) || ((dastat&8) == 0)) /* Don't aspect unscaled perms */
{
yv2 = mulscale16(-xv,yxaspect);
xv2 = mulscale16(yv,yxaspect);
}
else
{
yv2 = -xv;
xv2 = yv;
}
x1 = (lx>>16);
x2 = (rx>>16);
oy = 0;
x = (x1<<16)-1-gx1;
y = (oy<<16)+65535-gy1;
bx = dmulscale16(x,xv2,y,xv);
by = dmulscale16(x,yv2,y,yv);
if (dastat&4) {
yv = -yv;
yv2 = -yv2;
by = (ysiz<<16)-1-by;
}
if ((vidoption == 1) && (origbuffermode == 0))
{
if (dastat&128)
{
obuffermode = buffermode;
buffermode = 0;
setactivepage(activepage);
}
}
else if (dastat&8)
permanentupdate = 1;
if ((dastat&1) == 0)
{
if (((a&1023) == 0) && (ysiz <= 256)) /* vlineasm4 has 256 high limit! */
{
if (dastat&64)
setupvlineasm(24L);
else
setupmvlineasm(24L);
by <<= 8;
yv <<= 8;
yv2 <<= 8;
palookupoffse[0] = palookupoffse[1] = palookupoffse[2] = palookupoffse[3] = palookupoffs;
vince[0] = vince[1] = vince[2] = vince[3] = yv;
for(x=x1; x<x2; x+=4)
{
bad = 15;
xend = min(x2-x,4);
for(xx=0; xx<xend; xx++)
{
bx += xv2;
y1 = uplc[x+xx];
y2 = dplc[x+xx];
if ((dastat&8) == 0)
{
if (startumost[x+xx] > y1) y1 = startumost[x+xx];
if (startdmost[x+xx] < y2) y2 = startdmost[x+xx];
}
if (y2 <= y1) continue;
by += yv*(y1-oy);
oy = y1;
bufplce[xx] = (bx>>16)*ysiz+bufplc;
vplce[xx] = by;
y1ve[xx] = y1;
y2ve[xx] = y2-1;
bad &= ~pow2char[xx];
}
p = x+frameplace;
u4 = max(max(y1ve[0],y1ve[1]),max(y1ve[2],y1ve[3]));
d4 = min(min(y2ve[0],y2ve[1]),min(y2ve[2],y2ve[3]));
if (dastat&64)
{
if ((bad != 0) || (u4 >= d4))
{
if (!(bad&1)) prevlineasm1(vince[0],palookupoffse[0],y2ve[0]-y1ve[0],vplce[0],bufplce[0],ylookup[y1ve[0]]+p+0);
if (!(bad&2)) prevlineasm1(vince[1],palookupoffse[1],y2ve[1]-y1ve[1],vplce[1],bufplce[1],ylookup[y1ve[1]]+p+1);
if (!(bad&4)) prevlineasm1(vince[2],palookupoffse[2],y2ve[2]-y1ve[2],vplce[2],bufplce[2],ylookup[y1ve[2]]+p+2);
if (!(bad&8)) prevlineasm1(vince[3],palookupoffse[3],y2ve[3]-y1ve[3],vplce[3],bufplce[3],ylookup[y1ve[3]]+p+3);
continue;
}
if (u4 > y1ve[0]) vplce[0] = prevlineasm1(vince[0],palookupoffse[0],u4-y1ve[0]-1,vplce[0],bufplce[0],ylookup[y1ve[0]]+p+0);
if (u4 > y1ve[1]) vplce[1] = prevlineasm1(vince[1],palookupoffse[1],u4-y1ve[1]-1,vplce[1],bufplce[1],ylookup[y1ve[1]]+p+1);
if (u4 > y1ve[2]) vplce[2] = prevlineasm1(vince[2],palookupoffse[2],u4-y1ve[2]-1,vplce[2],bufplce[2],ylookup[y1ve[2]]+p+2);
if (u4 > y1ve[3]) vplce[3] = prevlineasm1(vince[3],palookupoffse[3],u4-y1ve[3]-1,vplce[3],bufplce[3],ylookup[y1ve[3]]+p+3);
if (d4 >= u4) vlineasm4(d4-u4+1,ylookup[u4]+p);
i = p+ylookup[d4+1];
if (y2ve[0] > d4) prevlineasm1(vince[0],palookupoffse[0],y2ve[0]-d4-1,vplce[0],bufplce[0],i+0);
if (y2ve[1] > d4) prevlineasm1(vince[1],palookupoffse[1],y2ve[1]-d4-1,vplce[1],bufplce[1],i+1);
if (y2ve[2] > d4) prevlineasm1(vince[2],palookupoffse[2],y2ve[2]-d4-1,vplce[2],bufplce[2],i+2);
if (y2ve[3] > d4) prevlineasm1(vince[3],palookupoffse[3],y2ve[3]-d4-1,vplce[3],bufplce[3],i+3);
}
else
{
if ((bad != 0) || (u4 >= d4))
{
if (!(bad&1)) mvlineasm1(vince[0],palookupoffse[0],y2ve[0]-y1ve[0],vplce[0],bufplce[0],ylookup[y1ve[0]]+p+0);
if (!(bad&2)) mvlineasm1(vince[1],palookupoffse[1],y2ve[1]-y1ve[1],vplce[1],bufplce[1],ylookup[y1ve[1]]+p+1);
if (!(bad&4)) mvlineasm1(vince[2],palookupoffse[2],y2ve[2]-y1ve[2],vplce[2],bufplce[2],ylookup[y1ve[2]]+p+2);
if (!(bad&8)) mvlineasm1(vince[3],palookupoffse[3],y2ve[3]-y1ve[3],vplce[3],bufplce[3],ylookup[y1ve[3]]+p+3);
continue;
}
if (u4 > y1ve[0]) vplce[0] = mvlineasm1(vince[0],palookupoffse[0],u4-y1ve[0]-1,vplce[0],bufplce[0],ylookup[y1ve[0]]+p+0);
if (u4 > y1ve[1]) vplce[1] = mvlineasm1(vince[1],palookupoffse[1],u4-y1ve[1]-1,vplce[1],bufplce[1],ylookup[y1ve[1]]+p+1);
if (u4 > y1ve[2]) vplce[2] = mvlineasm1(vince[2],palookupoffse[2],u4-y1ve[2]-1,vplce[2],bufplce[2],ylookup[y1ve[2]]+p+2);
if (u4 > y1ve[3]) vplce[3] = mvlineasm1(vince[3],palookupoffse[3],u4-y1ve[3]-1,vplce[3],bufplce[3],ylookup[y1ve[3]]+p+3);
if (d4 >= u4) mvlineasm4(d4-u4+1,ylookup[u4]+p);
i = p+ylookup[d4+1];
if (y2ve[0] > d4) mvlineasm1(vince[0],palookupoffse[0],y2ve[0]-d4-1,vplce[0],bufplce[0],i+0);
if (y2ve[1] > d4) mvlineasm1(vince[1],palookupoffse[1],y2ve[1]-d4-1,vplce[1],bufplce[1],i+1);
if (y2ve[2] > d4) mvlineasm1(vince[2],palookupoffse[2],y2ve[2]-d4-1,vplce[2],bufplce[2],i+2);
if (y2ve[3] > d4) mvlineasm1(vince[3],palookupoffse[3],y2ve[3]-d4-1,vplce[3],bufplce[3],i+3);
}
faketimerhandler();
}
}
else
{
if (dastat&64)
{
if ((xv2&0x0000ffff) == 0)
{
qlinemode = 1;
setuprhlineasm4(0L,yv2<<16,(xv2>>16)*ysiz+(yv2>>16),palookupoffs,0L,0L);
}
else
{
qlinemode = 0;
setuprhlineasm4(xv2<<16,yv2<<16,(xv2>>16)*ysiz+(yv2>>16),palookupoffs,ysiz,0L);
}
}
else
setuprmhlineasm4(xv2<<16,yv2<<16,(xv2>>16)*ysiz+(yv2>>16),palookupoffs,ysiz,0L);
y1 = uplc[x1];
if (((dastat&8) == 0) && (startumost[x1] > y1)) y1 = startumost[x1];
y2 = y1;
for(x=x1; x<x2; x++)
{
ny1 = uplc[x]-1;
ny2 = dplc[x];
if ((dastat&8) == 0)
{
if (startumost[x]-1 > ny1) ny1 = startumost[x]-1;
if (startdmost[x] < ny2) ny2 = startdmost[x];
}
if (ny1 < ny2-1)
{
if (ny1 >= y2)
{
while (y1 < y2-1)
{
y1++;
if ((y1&31) == 0) faketimerhandler();
/* x,y1 */
bx += xv*(y1-oy);
by += yv*(y1-oy);
oy = y1;
if (dastat&64) {
if (qlinemode) rhlineasm4(x-lastx[y1],(bx>>16)*ysiz+(by>>16)+bufplc,0L,0L ,by<<16,ylookup[y1]+x+frameplace);
else rhlineasm4(x-lastx[y1],(bx>>16)*ysiz+(by>>16)+bufplc,0L,bx<<16,by<<16,ylookup[y1]+x+frameplace);
} else rmhlineasm4(x-lastx[y1],(bx>>16)*ysiz+(by>>16)+bufplc,0L,bx<<16,by<<16,ylookup[y1]+x+frameplace);
}
y1 = ny1;
}
else
{
while (y1 < ny1)
{
y1++;
if ((y1&31) == 0) faketimerhandler();
/* x,y1 */
bx += xv*(y1-oy);
by += yv*(y1-oy);
oy = y1;
if (dastat&64) {
if (qlinemode) rhlineasm4(x-lastx[y1],(bx>>16)*ysiz+(by>>16)+bufplc,0L,0L ,by<<16,ylookup[y1]+x+frameplace);
else rhlineasm4(x-lastx[y1],(bx>>16)*ysiz+(by>>16)+bufplc,0L,bx<<16,by<<16,ylookup[y1]+x+frameplace);
} else rmhlineasm4(x-lastx[y1],(bx>>16)*ysiz+(by>>16)+bufplc,0L,bx<<16,by<<16,ylookup[y1]+x+frameplace);
}
while (y1 > ny1) lastx[y1--] = x;
}
while (y2 > ny2)
{
y2--;
if ((y2&31) == 0) faketimerhandler();
/* x,y2 */
bx += xv*(y2-oy);
by += yv*(y2-oy);
oy = y2;
if (dastat&64) {
if (qlinemode) rhlineasm4(x-lastx[y2],(bx>>16)*ysiz+(by>>16)+bufplc,0L,0L ,by<<16,ylookup[y2]+x+frameplace);
else rhlineasm4(x-lastx[y2],(bx>>16)*ysiz+(by>>16)+bufplc,0L,bx<<16,by<<16,ylookup[y2]+x+frameplace);
} else rmhlineasm4(x-lastx[y2],(bx>>16)*ysiz+(by>>16)+bufplc,0L,bx<<16,by<<16,ylookup[y2]+x+frameplace);
}
while (y2 < ny2) lastx[y2++] = x;
}
else
{
while (y1 < y2-1)
{
y1++;
if ((y1&31) == 0) faketimerhandler();
/* x,y1 */
bx += xv*(y1-oy);
by += yv*(y1-oy);
oy = y1;
if (dastat&64)
{
if (qlinemode)
rhlineasm4(x-lastx[y1],(bx>>16)*ysiz+(by>>16)+bufplc,0L,0L ,by<<16,ylookup[y1]+x+frameplace);
else
rhlineasm4(x-lastx[y1],(bx>>16)*ysiz+(by>>16)+bufplc,0L,bx<<16,by<<16,ylookup[y1]+x+frameplace);
}
else
rmhlineasm4(x-lastx[y1],(bx>>16)*ysiz+(by>>16)+bufplc,0L,bx<<16,by<<16,ylookup[y1]+x+frameplace);
}
if (x == x2-1)
{
bx += xv2;
by += yv2;
break;
}
y1 = uplc[x+1];
if (((dastat&8) == 0) && (startumost[x+1] > y1))
y1 = startumost[x+1];
y2 = y1;
}
bx += xv2;
by += yv2;
}
while (y1 < y2-1)
{
y1++;
if ((y1&31) == 0) faketimerhandler();
/* x2,y1 */
bx += xv*(y1-oy);
by += yv*(y1-oy);
oy = y1;
if (dastat&64) {
if (qlinemode) rhlineasm4(x2-lastx[y1],(bx>>16)*ysiz+(by>>16)+bufplc,0L,0L ,by<<16,ylookup[y1]+x2+frameplace);
else rhlineasm4(x2-lastx[y1],(bx>>16)*ysiz+(by>>16)+bufplc,0L,bx<<16,by<<16,ylookup[y1]+x2+frameplace);
} else rmhlineasm4(x2-lastx[y1],(bx>>16)*ysiz+(by>>16)+bufplc,0L,bx<<16,by<<16,ylookup[y1]+x2+frameplace);
}
}
}
else
{
if ((dastat&1) == 0)
{
if (dastat&64)
setupspritevline(palookupoffs,(xv>>16)*ysiz,xv<<16,ysiz,yv,0L);
else
msetupspritevline(palookupoffs,(xv>>16)*ysiz,xv<<16,ysiz,yv,0L);
}
else
{
tsetupspritevline(palookupoffs,(xv>>16)*ysiz,xv<<16,ysiz,yv,0L);
if (dastat&32)
settrans(TRANS_REVERSE);
else
settrans(TRANS_NORMAL);
}
for(x=x1; x<x2; x++)
{
bx += xv2;
by += yv2;
y1 = uplc[x];
y2 = dplc[x];
if ((dastat&8) == 0)
{
if (startumost[x] > y1) y1 = startumost[x];
if (startdmost[x] < y2) y2 = startdmost[x];
}
if (y2 <= y1) continue;
switch(y1-oy)
{
case -1:
bx -= xv;
by -= yv;
oy = y1;
break;
case 0:
break;
case 1:
bx += xv;
by += yv;
oy = y1;
break;
default:
bx += xv*(y1-oy);
by += yv*(y1-oy);
oy = y1;
break;
}
p = ylookup[y1]+x+frameplace;
if ((dastat&1) == 0)
{
if (dastat&64)
spritevline(0L,by<<16,y2-y1+1,bx<<16,(bx>>16)*ysiz+(by>>16)+bufplc,p);
else
mspritevline(0L,by<<16,y2-y1+1,bx<<16,(bx>>16)*ysiz+(by>>16)+bufplc,p);
}
else
{
tspritevline(0L,by<<16,y2-y1+1,bx<<16,(bx>>16)*ysiz+(by>>16)+bufplc,p);
transarea += (y2-y1);
}
faketimerhandler();
}
}
if ((vidoption == 1) && (dastat&128) && (origbuffermode == 0))
{
buffermode = obuffermode;
setactivepage(activepage);
}
}
void nextpage(void)
{
int32_t i;
permfifotype *per;
if (qsetmode == 200)
{
for(i=permtail; i!=permhead; i=((i+1)&(MAXPERMS-1)))
{
per = &permfifo[i];
if ((per->pagesleft > 0) && (per->pagesleft <= numpages))
dorotatesprite(per->sx,per->sy,per->z,per->a,per->picnum,
per->dashade,per->dapalnum,per->dastat,
per->cx1,per->cy1,per->cx2,per->cy2);
}
} /* if */
_nextpage(); /* video driver specific. */
if (qsetmode == 200)
{
for(i=permtail; i!=permhead; i=((i+1)&(MAXPERMS-1)))
{
per = &permfifo[i];
if (per->pagesleft >= 130)
dorotatesprite(per->sx,per->sy,per->z,per->a,per->picnum,
per->dashade,per->dapalnum,per->dastat,
per->cx1,per->cy1,per->cx2,per->cy2);
if (per->pagesleft&127) per->pagesleft--;
if (((per->pagesleft&127) == 0) && (i == permtail))
permtail = ((permtail+1)&(MAXPERMS-1));
}
} /* if */
faketimerhandler();
if ((totalclock >= lastageclock+8) || (totalclock < lastageclock))
{
lastageclock = totalclock;
agecache();
}
beforedrawrooms = 1;
numframes++;
}
void loadtile(short tilenume)
{
uint8_t *ptr;
int32_t i, dasiz;
if ((unsigned)tilenume >= (unsigned)MAXTILES) return;
dasiz = tilesizx[tilenume]*tilesizy[tilenume];
if (dasiz <= 0) return;
i = tilefilenum[tilenume];
if (i != artfilnum)
{
if (artfil != -1) kclose(artfil);
artfilnum = i;
artfilplc = 0L;
artfilename[7] = (i%10)+48;
artfilename[6] = ((i/10)%10)+48;
artfilename[5] = ((i/100)%10)+48;
artfil = TCkopen4load(artfilename,0);
faketimerhandler();
}
#if BUILD_CACHEDEBUG
fprintf(stderr, "BUILDCACHE: Tile:%d\n", tilenume);
#endif
if (waloff[tilenume] == 0)
{
walock[tilenume] = 199;
allocache(&waloff[tilenume],dasiz,(uint8_t *) &walock[tilenume]);
}
if (artfilplc != tilefileoffs[tilenume])
{
klseek(artfil,tilefileoffs[tilenume]-artfilplc,SEEK_CUR);
faketimerhandler();
}
ptr = (uint8_t *)waloff[tilenume];
kread(artfil,ptr,dasiz);
faketimerhandler();
artfilplc = tilefileoffs[tilenume]+dasiz;
}
int allocatepermanenttile(short tilenume, int32_t xsiz, int32_t ysiz)
{
int32_t j, dasiz;
if ((xsiz <= 0) || (ysiz <= 0) || ((unsigned)tilenume >= (unsigned)MAXTILES))
return(0);
dasiz = xsiz*ysiz;
walock[tilenume] = 255;
allocache(&waloff[tilenume],dasiz,(uint8_t *) &walock[tilenume]);
tilesizx[tilenume] = xsiz;
tilesizy[tilenume] = ysiz;
picanm[tilenume] = 0;
j = 15;
while ((j > 1) && (pow2long[j] > xsiz)) j--;
picsiz[tilenume] = ((uint8_t )j);
j = 15;
while ((j > 1) && (pow2long[j] > ysiz)) j--;
picsiz[tilenume] += ((uint8_t )(j<<4));
return(waloff[tilenume]);
}
int loadpics(char *filename, char * gamedir)
{
int32_t offscount, localtilestart, localtileend, dasiz;
short fil, i, j, k;
//uint8_t fullpathartfilename[512];
strcpy(artfilename,filename);
for(i=0; i<MAXTILES; i++)
{
tilesizx[i] = 0;
tilesizy[i] = 0;
picanm[i] = 0L;
}
artsize = 0L;
numtilefiles = 0;
do
{
k = numtilefiles;
artfilename[7] = (k%10)+48;
artfilename[6] = ((k/10)%10)+48;
artfilename[5] = ((k/100)%10)+48;
if ((fil = TCkopen4load(artfilename,0)) != -1)
{
kread32(fil,&artversion);
if (artversion != 1) return(-1);
kread32(fil,&numtiles);
kread32(fil,&localtilestart);
kread32(fil,&localtileend);
/*kread(fil,&tilesizx[localtilestart],(localtileend-localtilestart+1)<<1);*/
for (i = localtilestart; i <= localtileend; i++)
kread16(fil,&tilesizx[i]);
/*kread(fil,&tilesizy[localtilestart],(localtileend-localtilestart+1)<<1);*/
for (i = localtilestart; i <= localtileend; i++)
kread16(fil,&tilesizy[i]);
/*kread(fil,&picanm[localtilestart],(localtileend-localtilestart+1)<<2);*/
for (i = localtilestart; i <= localtileend; i++)
kread32(fil,&picanm[i]);
offscount = 4+4+4+4+((localtileend-localtilestart+1)<<3);
for(i=localtilestart; i<=localtileend; i++)
{
tilefilenum[i] = k;
tilefileoffs[i] = offscount;
dasiz = (long)(tilesizx[i]*tilesizy[i]);
offscount += dasiz;
artsize += ((dasiz+15)&0xfffffff0);
}
kclose(fil);
numtilefiles++;
}
}
while (k != numtilefiles);
printf("Art files loaded\n");
clearbuf(&gotpic[0],(long)((MAXTILES+31)>>5),0L);
/* try dpmi_DETERMINEMAXREALALLOC! */
cachesize = max(artsize,1048576);
while ((pic = (uint8_t *)kkmalloc(cachesize)) == NULL)
{
cachesize -= 65536L;
if (cachesize < 65536) return(-1);
}
initcache(((long)FP_OFF(pic)+15)&0xfffffff0,(cachesize-((-(long)FP_OFF(pic))&15))&0xfffffff0);
for(i=0; i<MAXTILES; i++)
{
j = 15;
while ((j > 1) && (pow2long[j] > tilesizx[i])) j--;
picsiz[i] = ((uint8_t )j);
j = 15;
while ((j > 1) && (pow2long[j] > tilesizy[i])) j--;
picsiz[i] += ((uint8_t )(j<<4));
}
artfil = -1;
artfilnum = -1;
artfilplc = 0L;
return(0);
}
int clipinsidebox(int32_t x, int32_t y, short wallnum, int32_t walldist)
{
walltype *wal;
int32_t x1, y1, x2, y2, r;
r = (walldist<<1);
wal = &wall[wallnum];
x1 = wal->x+walldist-x;
y1 = wal->y+walldist-y;
wal = &wall[wal->point2];
x2 = wal->x+walldist-x;
y2 = wal->y+walldist-y;
if ((x1 < 0) && (x2 < 0)) return(0);
if ((y1 < 0) && (y2 < 0)) return(0);
if ((x1 >= r) && (x2 >= r)) return(0);
if ((y1 >= r) && (y2 >= r)) return(0);
x2 -= x1;
y2 -= y1;
if (x2*(walldist-y1) >= y2*(walldist-x1)) /* Front */
{
if (x2 > 0) x2 *= (0-y1);
else x2 *= (r-y1);
if (y2 > 0) y2 *= (r-x1);
else y2 *= (0-x1);
return(x2 < y2);
}
if (x2 > 0) x2 *= (r-y1);
else x2 *= (0-y1);
if (y2 > 0) y2 *= (0-x1);
else y2 *= (r-x1);
return((x2 >= y2)<<1);
}
static int clipinsideboxline(int32_t x, int32_t y, int32_t x1, int32_t y1, int32_t x2, int32_t y2, int32_t walldist)
{
int32_t r;
r = (walldist<<1);
x1 += walldist-x;
x2 += walldist-x;
if ((x1 < 0) && (x2 < 0)) return(0);
if ((x1 >= r) && (x2 >= r)) return(0);
y1 += walldist-y;
y2 += walldist-y;
if ((y1 < 0) && (y2 < 0)) return(0);
if ((y1 >= r) && (y2 >= r)) return(0);
x2 -= x1;
y2 -= y1;
if (x2*(walldist-y1) >= y2*(walldist-x1)) /* Front */
{
if (x2 > 0) x2 *= (0-y1);
else x2 *= (r-y1);
if (y2 > 0) y2 *= (r-x1);
else y2 *= (0-x1);
return(x2 < y2);
}
if (x2 > 0) x2 *= (r-y1);
else x2 *= (0-y1);
if (y2 > 0) y2 *= (0-x1);
else y2 *= (r-x1);
return((x2 >= y2)<<1);
}
void drawline256 (int32_t x1, int32_t y1, int32_t x2, int32_t y2, uint8_t col)
{
int32_t dx, dy, i, j, p, inc, plc, daend;
col = palookup[0][col];
dx = x2-x1;
dy = y2-y1;
if (dx >= 0)
{
if ((x1 >= wx2) || (x2 < wx1)) return;
if (x1 < wx1) y1 += scale(wx1-x1,dy,dx), x1 = wx1;
if (x2 > wx2) y2 += scale(wx2-x2,dy,dx), x2 = wx2;
}
else
{
if ((x2 >= wx2) || (x1 < wx1)) return;
if (x2 < wx1) y2 += scale(wx1-x2,dy,dx), x2 = wx1;
if (x1 > wx2) y1 += scale(wx2-x1,dy,dx), x1 = wx2;
}
if (dy >= 0)
{
if ((y1 >= wy2) || (y2 < wy1)) return;
if (y1 < wy1) x1 += scale(wy1-y1,dx,dy), y1 = wy1;
if (y2 > wy2) x2 += scale(wy2-y2,dx,dy), y2 = wy2;
}
else
{
if ((y2 >= wy2) || (y1 < wy1)) return;
if (y2 < wy1) x2 += scale(wy1-y2,dx,dy), y2 = wy1;
if (y1 > wy2) x1 += scale(wy2-y1,dx,dy), y1 = wy2;
}
if (klabs(dx) >= klabs(dy))
{
if (dx == 0) return;
if (dx < 0)
{
i = x1;
x1 = x2;
x2 = i;
i = y1;
y1 = y2;
y2 = i;
}
inc = divscale12(dy,dx);
plc = y1+mulscale12((2047-x1)&4095,inc);
i = ((x1+2048)>>12);
daend = ((x2+2048)>>12);
for(; i<daend; i++)
{
j = (plc>>12);
if ((j >= startumost[i]) && (j < startdmost[i]))
drawpixel(ylookup[j]+i+frameplace,col);
plc += inc;
}
}
else
{
if (dy < 0)
{
i = x1;
x1 = x2;
x2 = i;
i = y1;
y1 = y2;
y2 = i;
}
inc = divscale12(dx,dy);
plc = x1+mulscale12((2047-y1)&4095,inc);
i = ((y1+2048)>>12);
daend = ((y2+2048)>>12);
p = ylookup[i]+frameplace;
for(; i<daend; i++)
{
j = (plc>>12);
if ((i >= startumost[j]) && (i < startdmost[j]))
drawpixel(j+p,col);
plc += inc;
p += ylookup[1];
}
}
}
/*
FCS: Return true if the point (x,Y) is inside the sector sectnum.
Note that a sector is closed (but can be concave) so the answer is always 0 or 1.
Algorithm: This is an optimized raycasting inside polygon test:
http://en.wikipedia.org/wiki/Point_in_polygon#Ray_casting_algorithm
The goal is to follow an horizontal ray passing by (x,y) and count how many
wall are being crossed.
If it is an odd number of time: (x,y) is inside the sector.
If it is an even nymber of time:(x,y) is outside the sector.
*/
int inside(int32_t x, int32_t y, short sectnum)
{
walltype *wal;
int32_t i, x1, y1, x2, y2;
uint32_t wallCrossed;
//Quick check if the sector ID is valid.
if ((sectnum < 0) || (sectnum >= numsectors)) return(-1);
wallCrossed = 0;
wal = &wall[sector[sectnum].wallptr];
i = sector[sectnum].wallnum;
do
{
y1 = wal->y-y;
y2 = wall[wal->point2].y-y;
// Compare the sign of y1 and y2.
// If (y1^y2) < 0 : y1 and y2 have different sign bit: y is between wal->y and wall[wal->point2].y.
if ((y1^y2) < 0)
{
x1 = wal->x-x;
x2 = wall[wal->point2].x-x;
//If (x1^x2) >= 0 x1 and x2 have identic sign bit: x is on the left or the right of both wal->x and wall[wal->point2].x.
if ((x1^x2) >= 0)
{
// If (x,y) is on totally on the left or on the right, just count x1 (which indicate if we are on
// (x,y) is on the left or on the right.
wallCrossed ^= x1;
}
else
{
// This is the most complicated case: X is between x1 and x2 and y is between y1 and y2.
// We need to know exactly if it is on the left or on the right in order to know if the ray
// is crossing the wall or not,
// The sign of the Cross-Product can answer this case :) !
wallCrossed ^= (x1*y2-x2*y1)^y2;
}
}
wal++;
i--;
} while (i);
//Just return the sign. If the position vector cut the sector walls an odd number of time
//it is inside. Otherwise (even) it is outside.
return(wallCrossed>>31);
}
int getangle(int32_t xvect, int32_t yvect)
{
if ((xvect|yvect) == 0) return(0);
if (xvect == 0) return(512+((yvect<0)<<10));
if (yvect == 0) return(((xvect<0)<<10));
if (xvect == yvect) return(256+((xvect<0)<<10));
if (xvect == -yvect) return(768+((xvect>0)<<10));
if (klabs(xvect) > klabs(yvect))
return(((radarang[640+scale(160,yvect,xvect)]>>6)+((xvect<0)<<10))&2047);
return(((radarang[640-scale(160,xvect,yvect)]>>6)+512+((yvect<0)<<10))&2047);
}
int ksqrt(int32_t num)
{
return(nsqrtasm(num));
}
void copytilepiece(int32_t tilenume1, int32_t sx1, int32_t sy1, int32_t xsiz, int32_t ysiz,
int32_t tilenume2, int32_t sx2, int32_t sy2)
{
uint8_t *ptr1, *ptr2, dat;
int32_t xsiz1, ysiz1, xsiz2, ysiz2, i, j, x1, y1, x2, y2;
xsiz1 = tilesizx[tilenume1];
ysiz1 = tilesizy[tilenume1];
xsiz2 = tilesizx[tilenume2];
ysiz2 = tilesizy[tilenume2];
if ((xsiz1 > 0) && (ysiz1 > 0) && (xsiz2 > 0) && (ysiz2 > 0))
{
if (waloff[tilenume1] == 0) loadtile((short) tilenume1);
if (waloff[tilenume2] == 0) loadtile((short) tilenume2);
x1 = sx1;
for(i=0; i<xsiz; i++)
{
y1 = sy1;
for(j=0; j<ysiz; j++)
{
x2 = sx2+i;
y2 = sy2+j;
if ((x2 >= 0) && (y2 >= 0) && (x2 < xsiz2) && (y2 < ysiz2))
{
ptr1 = (uint8_t *) (waloff[tilenume1] + x1*ysiz1 + y1);
ptr2 = (uint8_t *) (waloff[tilenume2] + x2*ysiz2 + y2);
dat = *ptr1;
if (dat != 255)
*ptr2 = *ptr1;
}
y1++;
if (y1 >= ysiz1) y1 = 0;
}
x1++;
if (x1 >= xsiz1) x1 = 0;
}
}
}
static void drawmaskwall(short damaskwallcnt)
{
int32_t i, j, k, x, z, sectnum, z1, z2, lx, rx;
sectortype *sec, *nsec;
walltype *wal;
z = maskwall[damaskwallcnt];
wal = &wall[thewall[z]];
sectnum = thesector[z];
sec = §or[sectnum];
nsec = §or[wal->nextsector];
z1 = max(nsec->ceilingz,sec->ceilingz);
z2 = min(nsec->floorz,sec->floorz);
wallmost(uwall,z,sectnum,(uint8_t )0);
wallmost(uplc,z,(long)wal->nextsector,(uint8_t )0);
for(x=xb1[z]; x<=xb2[z]; x++) if (uplc[x] > uwall[x]) uwall[x] = uplc[x];
wallmost(dwall,z,sectnum,(uint8_t )1);
wallmost(dplc,z,(long)wal->nextsector,(uint8_t )1);
for(x=xb1[z]; x<=xb2[z]; x++) if (dplc[x] < dwall[x]) dwall[x] = dplc[x];
prepwall(z,wal);
globalorientation = (long)wal->cstat;
globalpicnum = wal->overpicnum;
if ((unsigned)globalpicnum >= (unsigned)MAXTILES) globalpicnum = 0;
globalxpanning = (long)wal->xpanning;
globalypanning = (long)wal->ypanning;
if (picanm[globalpicnum]&192) globalpicnum += animateoffs(globalpicnum,(short)(thewall[z]+16384));
globalshade = (long)wal->shade;
globvis = globalvisibility;
if (sec->visibility != 0) globvis = mulscale4(globvis,(long)((uint8_t )(sec->visibility+16)));
globalpal = (long)wal->pal;
globalshiftval = (picsiz[globalpicnum]>>4);
if (pow2long[globalshiftval] != tilesizy[globalpicnum]) globalshiftval++;
globalshiftval = 32-globalshiftval;
globalyscale = (wal->yrepeat<<(globalshiftval-19));
if ((globalorientation&4) == 0)
globalzd = (((globalposz-z1)*globalyscale)<<8);
else
globalzd = (((globalposz-z2)*globalyscale)<<8);
globalzd += (globalypanning<<24);
if (globalorientation&256) globalyscale = -globalyscale, globalzd = -globalzd;
for(i=smostwallcnt-1; i>=0; i--)
{
j = smostwall[i];
if ((xb1[j] > xb2[z]) || (xb2[j] < xb1[z])) continue;
if (wallfront(j,z)) continue;
lx = max(xb1[j],xb1[z]);
rx = min(xb2[j],xb2[z]);
switch(smostwalltype[i])
{
case 0:
if (lx <= rx)
{
if ((lx == xb1[z]) && (rx == xb2[z])) return;
clearbufbyte(&dwall[lx],(rx-lx+1)*sizeof(dwall[0]),0L);
}
break;
case 1:
k = smoststart[i] - xb1[j];
for(x=lx; x<=rx; x++)
if (smost[k+x] > uwall[x]) uwall[x] = smost[k+x];
break;
case 2:
k = smoststart[i] - xb1[j];
for(x=lx; x<=rx; x++)
if (smost[k+x] < dwall[x]) dwall[x] = smost[k+x];
break;
}
}
/* maskwall */
if ((searchit >= 1) && (searchx >= xb1[z]) && (searchx <= xb2[z]))
if ((searchy >= uwall[searchx]) && (searchy <= dwall[searchx]))
{
searchsector = sectnum;
searchwall = thewall[z];
searchstat = 4;
searchit = 1;
}
if ((globalorientation&128) == 0)
maskwallscan(xb1[z],xb2[z],uwall,dwall,swall,lwall);
else
{
if (globalorientation&128)
{
if (globalorientation&512)
settrans(TRANS_REVERSE);
else
settrans(TRANS_NORMAL);
}
transmaskwallscan(xb1[z],xb2[z]);
}
}
static void ceilspritehline (int32_t x2, int32_t y)
{
int32_t x1, v, bx, by;
/*
* x = x1 + (x2-x1)t + (y1-y2)u � x = 160v
* y = y1 + (y2-y1)t + (x2-x1)u � y = (scrx-160)v
* z = z1 = z2 � z = posz + (scry-horiz)v
*/
x1 = lastx[y];
if (x2 < x1) return;
v = mulscale20(globalzd,horizlookup[y-globalhoriz+horizycent]);
bx = mulscale14(globalx2*x1+globalx1,v) + globalxpanning;
by = mulscale14(globaly2*x1+globaly1,v) + globalypanning;
asm1 = mulscale14(globalx2,v);
asm2 = mulscale14(globaly2,v);
asm3 = (long)FP_OFF(palookup[globalpal]) + (getpalookup((long)mulscale28(klabs(v),globvis),globalshade)<<8);
if ((globalorientation&2) == 0)
mhline(globalbufplc,bx,(x2-x1)<<16,0L,by,ylookup[y]+x1+frameoffset);
else
{
thline(globalbufplc,bx,(x2-x1)<<16,0L,by,ylookup[y]+x1+frameoffset);
transarea += (x2-x1);
}
}
static void ceilspritescan (int32_t x1, int32_t x2)
{
int32_t x, y1, y2, twall, bwall;
y1 = uwall[x1];
y2 = y1;
for(x=x1; x<=x2; x++)
{
twall = uwall[x]-1;
bwall = dwall[x];
if (twall < bwall-1)
{
if (twall >= y2)
{
while (y1 < y2-1) ceilspritehline(x-1,++y1);
y1 = twall;
}
else
{
while (y1 < twall) ceilspritehline(x-1,++y1);
while (y1 > twall) lastx[y1--] = x;
}
while (y2 > bwall) ceilspritehline(x-1,--y2);
while (y2 < bwall) lastx[y2++] = x;
}
else
{
while (y1 < y2-1) ceilspritehline(x-1,++y1);
if (x == x2) break;
y1 = uwall[x+1];
y2 = y1;
}
}
while (y1 < y2-1) ceilspritehline(x2,++y1);
faketimerhandler();
}
static void drawsprite (int32_t snum)
{
spritetype *tspr;
sectortype *sec;
int32_t startum, startdm, sectnum, xb, yp, cstat;
int32_t siz, xsiz, ysiz, xoff, yoff, xspan, yspan;
int32_t x1, y1, x2, y2, lx, rx, dalx2, darx2, i, j, k, x, linum, linuminc;
int32_t yinc, z, z1, z2, xp1, yp1, xp2, yp2;
int32_t xv, yv, top, topinc, bot, botinc, hplc, hinc;
int32_t cosang, sinang, dax, day, lpoint, lmax, rpoint, rmax, dax1, dax2, y;
int32_t npoints, npoints2, zz, t, zsgn, zzsgn;
short tilenum, spritenum;
uint8_t swapped, daclip;
#ifdef SUPERBUILD
int32_t *longptr;
#endif
tspr = tspriteptr[snum];
xb = spritesx[snum];
yp = spritesy[snum];
tilenum = tspr->picnum;
spritenum = tspr->owner;
cstat = tspr->cstat;
if ((cstat&48) != 48)
{
if (picanm[tilenum]&192) tilenum += animateoffs(tilenum,(short) (spritenum+32768));
if ((tilesizx[tilenum] <= 0) || (tilesizy[tilenum] <= 0) || (spritenum < 0))
return;
}
if ((tspr->xrepeat <= 0) || (tspr->yrepeat <= 0)) return;
sectnum = tspr->sectnum;
sec = §or[sectnum];
globalpal = tspr->pal;
// FIX_00088: crash on maps using a bad palette index (like the end of roch3.map)
if (!palookup[globalpal])
globalpal = 0; // seem to crash when globalpal > 25
globalshade = tspr->shade;
if (cstat&2)
{
if (cstat&512)
settrans(TRANS_REVERSE);
else
settrans(TRANS_NORMAL);
}
xoff = (long)((int8_t )((picanm[tilenum]>>8)&255))+((long)tspr->xoffset);
yoff = (long)((int8_t )((picanm[tilenum]>>16)&255))+((long)tspr->yoffset);
if ((cstat&48) == 0)
{
if (yp <= (4<<8)) return;
siz = divscale19(xdimenscale,yp);
xv = mulscale16(((long)tspr->xrepeat)<<16,xyaspect);
xspan = tilesizx[tilenum];
yspan = tilesizy[tilenum];
xsiz = mulscale30(siz,xv*xspan);
ysiz = mulscale14(siz,tspr->yrepeat*yspan);
if (((tilesizx[tilenum]>>11) >= xsiz) || (yspan >= (ysiz>>1)))
return; /* Watch out for divscale overflow */
x1 = xb-(xsiz>>1);
if (xspan&1) x1 += mulscale31(siz,xv); /* Odd xspans */
i = mulscale30(siz,xv*xoff);
if ((cstat&4) == 0) x1 -= i;
else x1 += i;
y1 = mulscale16(tspr->z-globalposz,siz);
y1 -= mulscale14(siz,tspr->yrepeat*yoff);
y1 += (globalhoriz<<8)-ysiz;
if (cstat&128)
{
y1 += (ysiz>>1);
if (yspan&1) y1 += mulscale15(siz,tspr->yrepeat); /* Odd yspans */
}
x2 = x1+xsiz-1;
y2 = y1+ysiz-1;
if ((y1|255) >= (y2|255)) return;
lx = (x1>>8)+1;
if (lx < 0) lx = 0;
rx = (x2>>8);
if (rx >= xdimen) rx = xdimen-1;
if (lx > rx) return;
yinc = divscale32(yspan,ysiz);
if ((sec->ceilingstat&3) == 0)
startum = globalhoriz+mulscale24(siz,sec->ceilingz-globalposz)-1;
else
startum = 0;
if ((sec->floorstat&3) == 0)
startdm = globalhoriz+mulscale24(siz,sec->floorz-globalposz)+1;
else
startdm = 0x7fffffff;
if ((y1>>8) > startum) startum = (y1>>8);
if ((y2>>8) < startdm) startdm = (y2>>8);
if (startum < -32768) startum = -32768;
if (startdm > 32767) startdm = 32767;
if (startum >= startdm) return;
if ((cstat&4) == 0)
{
linuminc = divscale24(xspan,xsiz);
linum = mulscale8((lx<<8)-x1,linuminc);
}
else
{
linuminc = -divscale24(xspan,xsiz);
linum = mulscale8((lx<<8)-x2,linuminc);
}
if ((cstat&8) > 0)
{
yinc = -yinc;
i = y1;
y1 = y2;
y2 = i;
}
for(x=lx; x<=rx; x++)
{
uwall[x] = max(startumost[x+windowx1]-windowy1,(short)startum);
dwall[x] = min(startdmost[x+windowx1]-windowy1,(short)startdm);
}
daclip = 0;
for(i=smostwallcnt-1; i>=0; i--)
{
if (smostwalltype[i]&daclip) continue;
j = smostwall[i];
if ((xb1[j] > rx) || (xb2[j] < lx)) continue;
if ((yp <= yb1[j]) && (yp <= yb2[j])) continue;
if (spritewallfront(tspr,(long)thewall[j]) && ((yp <= yb1[j]) || (yp <= yb2[j]))) continue;
dalx2 = max(xb1[j],lx);
darx2 = min(xb2[j],rx);
switch(smostwalltype[i])
{
case 0:
if (dalx2 <= darx2)
{
if ((dalx2 == lx) && (darx2 == rx)) return;
clearbufbyte(&dwall[dalx2],(darx2-dalx2+1)*sizeof(dwall[0]),0L);
}
break;
case 1:
k = smoststart[i] - xb1[j];
for(x=dalx2; x<=darx2; x++)
if (smost[k+x] > uwall[x]) uwall[x] = smost[k+x];
if ((dalx2 == lx) && (darx2 == rx)) daclip |= 1;
break;
case 2:
k = smoststart[i] - xb1[j];
for(x=dalx2; x<=darx2; x++)
if (smost[k+x] < dwall[x]) dwall[x] = smost[k+x];
if ((dalx2 == lx) && (darx2 == rx)) daclip |= 2;
break;
}
}
if (uwall[rx] >= dwall[rx])
{
for(x=lx; x<rx; x++)
if (uwall[x] < dwall[x]) break;
if (x == rx) return;
}
/* sprite */
if ((searchit >= 1) && (searchx >= lx) && (searchx <= rx))
if ((searchy >= uwall[searchx]) && (searchy < dwall[searchx]))
{
searchsector = sectnum;
searchwall = spritenum;
searchstat = 3;
searchit = 1;
}
z2 = tspr->z - ((yoff*tspr->yrepeat)<<2);
if (cstat&128)
{
z2 += ((yspan*tspr->yrepeat)<<1);
if (yspan&1) z2 += (tspr->yrepeat<<1); /* Odd yspans */
}
z1 = z2 - ((yspan*tspr->yrepeat)<<2);
globalorientation = 0;
globalpicnum = tilenum;
if ((unsigned)globalpicnum >= (unsigned)MAXTILES) globalpicnum = 0;
globalxpanning = 0L;
globalypanning = 0L;
globvis = globalvisibility;
if (sec->visibility != 0) globvis = mulscale4(globvis,(long)((uint8_t )(sec->visibility+16)));
globalshiftval = (picsiz[globalpicnum]>>4);
if (pow2long[globalshiftval] != tilesizy[globalpicnum]) globalshiftval++;
globalshiftval = 32-globalshiftval;
globalyscale = divscale(512,tspr->yrepeat,globalshiftval-19);
globalzd = (((globalposz-z1)*globalyscale)<<8);
if ((cstat&8) > 0)
{
globalyscale = -globalyscale;
globalzd = (((globalposz-z2)*globalyscale)<<8);
}
qinterpolatedown16((int32_t *)&lwall[lx],rx-lx+1,linum,linuminc);
clearbuf(&swall[lx],rx-lx+1,mulscale19(yp,xdimscale));
if ((cstat&2) == 0)
maskwallscan(lx,rx,uwall,dwall,swall,lwall);
else
transmaskwallscan(lx,rx);
}
else if ((cstat&48) == 16)
{
if ((cstat&4) > 0) xoff = -xoff;
if ((cstat&8) > 0) yoff = -yoff;
xspan = tilesizx[tilenum];
yspan = tilesizy[tilenum];
xv = tspr->xrepeat*sintable[(tspr->ang+2560+1536)&2047];
yv = tspr->xrepeat*sintable[(tspr->ang+2048+1536)&2047];
i = (xspan>>1)+xoff;
x1 = tspr->x-globalposx-mulscale16(xv,i);
x2 = x1+mulscale16(xv,xspan);
y1 = tspr->y-globalposy-mulscale16(yv,i);
y2 = y1+mulscale16(yv,xspan);
yp1 = dmulscale6(x1,cosviewingrangeglobalang,y1,sinviewingrangeglobalang);
yp2 = dmulscale6(x2,cosviewingrangeglobalang,y2,sinviewingrangeglobalang);
if ((yp1 <= 0) && (yp2 <= 0)) return;
xp1 = dmulscale6(y1,cosglobalang,-x1,singlobalang);
xp2 = dmulscale6(y2,cosglobalang,-x2,singlobalang);
x1 += globalposx;
y1 += globalposy;
x2 += globalposx;
y2 += globalposy;
swapped = 0;
if (dmulscale32(xp1,yp2,-xp2,yp1) >= 0) /* If wall's NOT facing you */
{
if ((cstat&64) != 0) return;
i = xp1, xp1 = xp2, xp2 = i;
i = yp1, yp1 = yp2, yp2 = i;
i = x1, x1 = x2, x2 = i;
i = y1, y1 = y2, y2 = i;
swapped = 1;
}
if (xp1 >= -yp1)
{
if (xp1 > yp1) return;
if (yp1 == 0) return;
xb1[MAXWALLSB-1] = halfxdimen + scale(xp1,halfxdimen,yp1);
if (xp1 >= 0) xb1[MAXWALLSB-1]++; /* Fix for SIGNED divide */
if (xb1[MAXWALLSB-1] >= xdimen) xb1[MAXWALLSB-1] = xdimen-1;
yb1[MAXWALLSB-1] = yp1;
}
else
{
if (xp2 < -yp2) return;
xb1[MAXWALLSB-1] = 0;
i = yp1-yp2+xp1-xp2;
if (i == 0) return;
yb1[MAXWALLSB-1] = yp1 + scale(yp2-yp1,xp1+yp1,i);
}
if (xp2 <= yp2)
{
if (xp2 < -yp2) return;
if (yp2 == 0) return;
xb2[MAXWALLSB-1] = halfxdimen + scale(xp2,halfxdimen,yp2) - 1;
if (xp2 >= 0) xb2[MAXWALLSB-1]++; /* Fix for SIGNED divide */
if (xb2[MAXWALLSB-1] >= xdimen) xb2[MAXWALLSB-1] = xdimen-1;
yb2[MAXWALLSB-1] = yp2;
}
else
{
if (xp1 > yp1) return;
xb2[MAXWALLSB-1] = xdimen-1;
i = xp2-xp1+yp1-yp2;
if (i == 0) return;
yb2[MAXWALLSB-1] = yp1 + scale(yp2-yp1,yp1-xp1,i);
}
if ((yb1[MAXWALLSB-1] < 256) || (yb2[MAXWALLSB-1] < 256) || (xb1[MAXWALLSB-1] > xb2[MAXWALLSB-1]))
return;
topinc = -mulscale10(yp1,xspan);
top = (((mulscale10(xp1,xdimen) - mulscale9(xb1[MAXWALLSB-1]-halfxdimen,yp1))*xspan)>>3);
botinc = ((yp2-yp1)>>8);
bot = mulscale11(xp1-xp2,xdimen) + mulscale2(xb1[MAXWALLSB-1]-halfxdimen,botinc);
j = xb2[MAXWALLSB-1]+3;
z = mulscale20(top,krecipasm(bot));
lwall[xb1[MAXWALLSB-1]] = (z>>8);
for(x=xb1[MAXWALLSB-1]+4; x<=j; x+=4)
{
top += topinc;
bot += botinc;
zz = z;
z = mulscale20(top,krecipasm(bot));
lwall[x] = (z>>8);
i = ((z+zz)>>1);
lwall[x-2] = (i>>8);
lwall[x-3] = ((i+zz)>>9);
lwall[x-1] = ((i+z)>>9);
}
if (lwall[xb1[MAXWALLSB-1]] < 0) lwall[xb1[MAXWALLSB-1]] = 0;
if (lwall[xb2[MAXWALLSB-1]] >= xspan) lwall[xb2[MAXWALLSB-1]] = xspan-1;
if ((swapped^((cstat&4)>0)) > 0)
{
j = xspan-1;
for(x=xb1[MAXWALLSB-1]; x<=xb2[MAXWALLSB-1]; x++)
lwall[x] = j-lwall[x];
}
rx1[MAXWALLSB-1] = xp1;
ry1[MAXWALLSB-1] = yp1;
rx2[MAXWALLSB-1] = xp2;
ry2[MAXWALLSB-1] = yp2;
hplc = divscale19(xdimenscale,yb1[MAXWALLSB-1]);
hinc = divscale19(xdimenscale,yb2[MAXWALLSB-1]);
hinc = (hinc-hplc)/(xb2[MAXWALLSB-1]-xb1[MAXWALLSB-1]+1);
z2 = tspr->z - ((yoff*tspr->yrepeat)<<2);
if (cstat&128)
{
z2 += ((yspan*tspr->yrepeat)<<1);
if (yspan&1) z2 += (tspr->yrepeat<<1); /* Odd yspans */
}
z1 = z2 - ((yspan*tspr->yrepeat)<<2);
globalorientation = 0;
globalpicnum = tilenum;
if ((unsigned)globalpicnum >= (unsigned)MAXTILES) globalpicnum = 0;
globalxpanning = 0L;
globalypanning = 0L;
globvis = globalvisibility;
if (sec->visibility != 0) globvis = mulscale4(globvis,(long)((uint8_t )(sec->visibility+16)));
globalshiftval = (picsiz[globalpicnum]>>4);
if (pow2long[globalshiftval] != tilesizy[globalpicnum]) globalshiftval++;
globalshiftval = 32-globalshiftval;
globalyscale = divscale(512,tspr->yrepeat,globalshiftval-19);
globalzd = (((globalposz-z1)*globalyscale)<<8);
if ((cstat&8) > 0)
{
globalyscale = -globalyscale;
globalzd = (((globalposz-z2)*globalyscale)<<8);
}
if (((sec->ceilingstat&1) == 0) && (z1 < sec->ceilingz))
z1 = sec->ceilingz;
if (((sec->floorstat&1) == 0) && (z2 > sec->floorz))
z2 = sec->floorz;
owallmost(uwall,(long)(MAXWALLSB-1),z1-globalposz);
owallmost(dwall,(long)(MAXWALLSB-1),z2-globalposz);
for(i=xb1[MAXWALLSB-1]; i<=xb2[MAXWALLSB-1]; i++)
{
swall[i] = (krecipasm(hplc)<<2);
hplc += hinc;
}
for(i=smostwallcnt-1; i>=0; i--)
{
j = smostwall[i];
if ((xb1[j] > xb2[MAXWALLSB-1]) || (xb2[j] < xb1[MAXWALLSB-1])) continue;
dalx2 = xb1[j];
darx2 = xb2[j];
if (max(yb1[MAXWALLSB-1],yb2[MAXWALLSB-1]) > min(yb1[j],yb2[j]))
{
if (min(yb1[MAXWALLSB-1],yb2[MAXWALLSB-1]) > max(yb1[j],yb2[j]))
{
x = 0x80000000;
}
else
{
x = thewall[j];
xp1 = wall[x].x;
yp1 = wall[x].y;
x = wall[x].point2;
xp2 = wall[x].x;
yp2 = wall[x].y;
z1 = (xp2-xp1)*(y1-yp1) - (yp2-yp1)*(x1-xp1);
z2 = (xp2-xp1)*(y2-yp1) - (yp2-yp1)*(x2-xp1);
if ((z1^z2) >= 0)
x = (z1+z2);
else
{
z1 = (x2-x1)*(yp1-y1) - (y2-y1)*(xp1-x1);
z2 = (x2-x1)*(yp2-y1) - (y2-y1)*(xp2-x1);
if ((z1^z2) >= 0)
x = -(z1+z2);
else
{
if ((xp2-xp1)*(tspr->y-yp1) == (tspr->x-xp1)*(yp2-yp1))
{
if (wall[thewall[j]].nextsector == tspr->sectnum)
x = 0x80000000;
else
x = 0x7fffffff;
}
else
{ /* INTERSECTION! */
x = (xp1-globalposx) + scale(xp2-xp1,z1,z1-z2);
y = (yp1-globalposy) + scale(yp2-yp1,z1,z1-z2);
yp1 = dmulscale14(x,cosglobalang,y,singlobalang);
if (yp1 > 0)
{
xp1 = dmulscale14(y,cosglobalang,-x,singlobalang);
x = halfxdimen + scale(xp1,halfxdimen,yp1);
if (xp1 >= 0) x++; /* Fix for SIGNED divide */
if (z1 < 0)
{
if (dalx2 < x) dalx2 = x;
}
else
{
if (darx2 > x) darx2 = x;
}
x = 0x80000001;
}
else
x = 0x7fffffff;
}
}
}
}
if (x < 0)
{
if (dalx2 < xb1[MAXWALLSB-1]) dalx2 = xb1[MAXWALLSB-1];
if (darx2 > xb2[MAXWALLSB-1]) darx2 = xb2[MAXWALLSB-1];
switch(smostwalltype[i])
{
case 0:
if (dalx2 <= darx2)
{
if ((dalx2 == xb1[MAXWALLSB-1]) && (darx2 == xb2[MAXWALLSB-1])) return;
clearbufbyte(&dwall[dalx2],(darx2-dalx2+1)*sizeof(dwall[0]),0L);
}
break;
case 1:
k = smoststart[i] - xb1[j];
for(x=dalx2; x<=darx2; x++)
if (smost[k+x] > uwall[x]) uwall[x] = smost[k+x];
break;
case 2:
k = smoststart[i] - xb1[j];
for(x=dalx2; x<=darx2; x++)
if (smost[k+x] < dwall[x]) dwall[x] = smost[k+x];
break;
}
}
}
}
/* sprite */
if ((searchit >= 1) && (searchx >= xb1[MAXWALLSB-1]) && (searchx <= xb2[MAXWALLSB-1]))
if ((searchy >= uwall[searchx]) && (searchy <= dwall[searchx]))
{
searchsector = sectnum;
searchwall = spritenum;
searchstat = 3;
searchit = 1;
}
if ((cstat&2) == 0)
maskwallscan(xb1[MAXWALLSB-1],xb2[MAXWALLSB-1],uwall,dwall,swall,lwall);
else
transmaskwallscan(xb1[MAXWALLSB-1],xb2[MAXWALLSB-1]);
}
else if ((cstat&48) == 32)
{
if ((cstat&64) != 0)
if ((globalposz > tspr->z) == ((cstat&8)==0))
return;
if ((cstat&4) > 0) xoff = -xoff;
if ((cstat&8) > 0) yoff = -yoff;
xspan = tilesizx[tilenum];
yspan = tilesizy[tilenum];
/* Rotate center point */
dax = tspr->x-globalposx;
day = tspr->y-globalposy;
rzi[0] = dmulscale10(cosglobalang,dax,singlobalang,day);
rxi[0] = dmulscale10(cosglobalang,day,-singlobalang,dax);
/* Get top-left corner */
i = ((tspr->ang+2048-globalang)&2047);
cosang = sintable[(i+512)&2047];
sinang = sintable[i];
dax = ((xspan>>1)+xoff)*tspr->xrepeat;
day = ((yspan>>1)+yoff)*tspr->yrepeat;
rzi[0] += dmulscale12(sinang,dax,cosang,day);
rxi[0] += dmulscale12(sinang,day,-cosang,dax);
/* Get other 3 corners */
dax = xspan*tspr->xrepeat;
day = yspan*tspr->yrepeat;
rzi[1] = rzi[0]-mulscale12(sinang,dax);
rxi[1] = rxi[0]+mulscale12(cosang,dax);
dax = -mulscale12(cosang,day);
day = -mulscale12(sinang,day);
rzi[2] = rzi[1]+dax;
rxi[2] = rxi[1]+day;
rzi[3] = rzi[0]+dax;
rxi[3] = rxi[0]+day;
/* Put all points on same z */
ryi[0] = scale((tspr->z-globalposz),yxaspect,320<<8);
if (ryi[0] == 0) return;
ryi[1] = ryi[2] = ryi[3] = ryi[0];
if ((cstat&4) == 0)
{
z = 0;
z1 = 1;
z2 = 3;
}
else
{
z = 1;
z1 = 0;
z2 = 2;
}
dax = rzi[z1]-rzi[z];
day = rxi[z1]-rxi[z];
bot = dmulscale8(dax,dax,day,day);
if (((klabs(dax)>>13) >= bot) || ((klabs(day)>>13) >= bot)) return;
globalx1 = divscale18(dax,bot);
globalx2 = divscale18(day,bot);
dax = rzi[z2]-rzi[z];
day = rxi[z2]-rxi[z];
bot = dmulscale8(dax,dax,day,day);
if (((klabs(dax)>>13) >= bot) || ((klabs(day)>>13) >= bot)) return;
globaly1 = divscale18(dax,bot);
globaly2 = divscale18(day,bot);
/* Calculate globals for hline texture mapping function */
globalxpanning = (rxi[z]<<12);
globalypanning = (rzi[z]<<12);
globalzd = (ryi[z]<<12);
rzi[0] = mulscale16(rzi[0],viewingrange);
rzi[1] = mulscale16(rzi[1],viewingrange);
rzi[2] = mulscale16(rzi[2],viewingrange);
rzi[3] = mulscale16(rzi[3],viewingrange);
if (ryi[0] < 0) /* If ceilsprite is above you, reverse order of points */
{
i = rxi[1];
rxi[1] = rxi[3];
rxi[3] = i;
i = rzi[1];
rzi[1] = rzi[3];
rzi[3] = i;
}
/* Clip polygon in 3-space */
npoints = 4;
/* Clip edge 1 */
npoints2 = 0;
zzsgn = rxi[0]+rzi[0];
for(z=0; z<npoints; z++)
{
zz = z+1;
if (zz == npoints) zz = 0;
zsgn = zzsgn;
zzsgn = rxi[zz]+rzi[zz];
if (zsgn >= 0)
{
rxi2[npoints2] = rxi[z];
ryi2[npoints2] = ryi[z];
rzi2[npoints2] = rzi[z];
npoints2++;
}
if ((zsgn^zzsgn) < 0)
{
t = divscale30(zsgn,zsgn-zzsgn);
rxi2[npoints2] = rxi[z] + mulscale30(t,rxi[zz]-rxi[z]);
ryi2[npoints2] = ryi[z] + mulscale30(t,ryi[zz]-ryi[z]);
rzi2[npoints2] = rzi[z] + mulscale30(t,rzi[zz]-rzi[z]);
npoints2++;
}
}
if (npoints2 <= 2) return;
/* Clip edge 2 */
npoints = 0;
zzsgn = rxi2[0]-rzi2[0];
for(z=0; z<npoints2; z++)
{
zz = z+1;
if (zz == npoints2) zz = 0;
zsgn = zzsgn;
zzsgn = rxi2[zz]-rzi2[zz];
if (zsgn <= 0)
{
rxi[npoints] = rxi2[z];
ryi[npoints] = ryi2[z];
rzi[npoints] = rzi2[z];
npoints++;
}
if ((zsgn^zzsgn) < 0)
{
t = divscale30(zsgn,zsgn-zzsgn);
rxi[npoints] = rxi2[z] + mulscale30(t,rxi2[zz]-rxi2[z]);
ryi[npoints] = ryi2[z] + mulscale30(t,ryi2[zz]-ryi2[z]);
rzi[npoints] = rzi2[z] + mulscale30(t,rzi2[zz]-rzi2[z]);
npoints++;
}
}
if (npoints <= 2) return;
/* Clip edge 3 */
npoints2 = 0;
zzsgn = ryi[0]*halfxdimen + (rzi[0]*(globalhoriz-0));
for(z=0; z<npoints; z++)
{
zz = z+1;
if (zz == npoints) zz = 0;
zsgn = zzsgn;
zzsgn = ryi[zz]*halfxdimen + (rzi[zz]*(globalhoriz-0));
if (zsgn >= 0)
{
rxi2[npoints2] = rxi[z];
ryi2[npoints2] = ryi[z];
rzi2[npoints2] = rzi[z];
npoints2++;
}
if ((zsgn^zzsgn) < 0)
{
t = divscale30(zsgn,zsgn-zzsgn);
rxi2[npoints2] = rxi[z] + mulscale30(t,rxi[zz]-rxi[z]);
ryi2[npoints2] = ryi[z] + mulscale30(t,ryi[zz]-ryi[z]);
rzi2[npoints2] = rzi[z] + mulscale30(t,rzi[zz]-rzi[z]);
npoints2++;
}
}
if (npoints2 <= 2) return;
/* Clip edge 4 */
npoints = 0;
zzsgn = ryi2[0]*halfxdimen + (rzi2[0]*(globalhoriz-ydimen));
for(z=0; z<npoints2; z++)
{
zz = z+1;
if (zz == npoints2) zz = 0;
zsgn = zzsgn;
zzsgn = ryi2[zz]*halfxdimen + (rzi2[zz]*(globalhoriz-ydimen));
if (zsgn <= 0)
{
rxi[npoints] = rxi2[z];
ryi[npoints] = ryi2[z];
rzi[npoints] = rzi2[z];
npoints++;
}
if ((zsgn^zzsgn) < 0)
{
t = divscale30(zsgn,zsgn-zzsgn);
rxi[npoints] = rxi2[z] + mulscale30(t,rxi2[zz]-rxi2[z]);
ryi[npoints] = ryi2[z] + mulscale30(t,ryi2[zz]-ryi2[z]);
rzi[npoints] = rzi2[z] + mulscale30(t,rzi2[zz]-rzi2[z]);
npoints++;
}
}
if (npoints <= 2) return;
/* Project onto screen */
lpoint = -1;
lmax = 0x7fffffff;
rpoint = -1;
rmax = 0x80000000;
for(z=0; z<npoints; z++)
{
xsi[z] = scale(rxi[z],xdimen<<15,rzi[z]) + (xdimen<<15);
ysi[z] = scale(ryi[z],xdimen<<15,rzi[z]) + (globalhoriz<<16);
if (xsi[z] < 0) xsi[z] = 0;
if (xsi[z] > (xdimen<<16)) xsi[z] = (xdimen<<16);
if (ysi[z] < ((long)0<<16)) ysi[z] = ((long)0<<16);
if (ysi[z] > ((long)ydimen<<16)) ysi[z] = ((long)ydimen<<16);
if (xsi[z] < lmax) lmax = xsi[z], lpoint = z;
if (xsi[z] > rmax) rmax = xsi[z], rpoint = z;
}
/* Get uwall arrays */
for(z=lpoint; z!=rpoint; z=zz)
{
zz = z+1;
if (zz == npoints) zz = 0;
dax1 = ((xsi[z]+65535)>>16);
dax2 = ((xsi[zz]+65535)>>16);
if (dax2 > dax1)
{
yinc = divscale16(ysi[zz]-ysi[z],xsi[zz]-xsi[z]);
y = ysi[z] + mulscale16((dax1<<16)-xsi[z],yinc);
qinterpolatedown16short((int32_t *)(&uwall[dax1]),dax2-dax1,y,yinc);
}
}
/* Get dwall arrays */
for(; z!=lpoint; z=zz)
{
zz = z+1;
if (zz == npoints) zz = 0;
dax1 = ((xsi[zz]+65535)>>16);
dax2 = ((xsi[z]+65535)>>16);
if (dax2 > dax1)
{
yinc = divscale16(ysi[zz]-ysi[z],xsi[zz]-xsi[z]);
y = ysi[zz] + mulscale16((dax1<<16)-xsi[zz],yinc);
qinterpolatedown16short((int32_t *)(&dwall[dax1]),dax2-dax1,y,yinc);
}
}
lx = ((lmax+65535)>>16);
rx = ((rmax+65535)>>16);
for(x=lx; x<=rx; x++)
{
uwall[x] = max(uwall[x],startumost[x+windowx1]-windowy1);
dwall[x] = min(dwall[x],startdmost[x+windowx1]-windowy1);
}
/* Additional uwall/dwall clipping goes here */
for(i=smostwallcnt-1; i>=0; i--)
{
j = smostwall[i];
if ((xb1[j] > rx) || (xb2[j] < lx)) continue;
if ((yp <= yb1[j]) && (yp <= yb2[j])) continue;
/* if (spritewallfront(tspr,thewall[j]) == 0) */
x = thewall[j];
xp1 = wall[x].x;
yp1 = wall[x].y;
x = wall[x].point2;
xp2 = wall[x].x;
yp2 = wall[x].y;
x = (xp2-xp1)*(tspr->y-yp1)-(tspr->x-xp1)*(yp2-yp1);
if ((yp > yb1[j]) && (yp > yb2[j])) x = -1;
if ((x >= 0) && ((x != 0) || (wall[thewall[j]].nextsector != tspr->sectnum))) continue;
dalx2 = max(xb1[j],lx);
darx2 = min(xb2[j],rx);
switch(smostwalltype[i])
{
case 0:
if (dalx2 <= darx2)
{
if ((dalx2 == lx) && (darx2 == rx)) return;
clearbufbyte(&dwall[dalx2],(darx2-dalx2+1)*sizeof(dwall[0]),0L);
}
break;
case 1:
k = smoststart[i] - xb1[j];
for(x=dalx2; x<=darx2; x++)
if (smost[k+x] > uwall[x]) uwall[x] = smost[k+x];
break;
case 2:
k = smoststart[i] - xb1[j];
for(x=dalx2; x<=darx2; x++)
if (smost[k+x] < dwall[x]) dwall[x] = smost[k+x];
break;
}
}
/* sprite */
if ((searchit >= 1) && (searchx >= lx) && (searchx <= rx))
if ((searchy >= uwall[searchx]) && (searchy <= dwall[searchx]))
{
searchsector = sectnum;
searchwall = spritenum;
searchstat = 3;
searchit = 1;
}
globalorientation = cstat;
globalpicnum = tilenum;
if ((unsigned)globalpicnum >= (unsigned)MAXTILES) globalpicnum = 0;
/* if (picanm[globalpicnum]&192) globalpicnum += animateoffs((short)globalpicnum,spritenum+32768); */
if (waloff[globalpicnum] == 0) loadtile(globalpicnum);
setgotpic(globalpicnum);
globalbufplc = waloff[globalpicnum];
globvis = mulscale16(globalhisibility,viewingrange);
if (sec->visibility != 0) globvis = mulscale4(globvis,(long)((uint8_t )(sec->visibility+16)));
x = picsiz[globalpicnum];
y = ((x>>4)&15);
x &= 15;
if (pow2long[x] != xspan)
{
x++;
globalx1 = mulscale(globalx1,xspan,x);
globalx2 = mulscale(globalx2,xspan,x);
}
dax = globalxpanning;
day = globalypanning;
globalxpanning = -dmulscale6(globalx1,day,globalx2,dax);
globalypanning = -dmulscale6(globaly1,day,globaly2,dax);
globalx2 = mulscale16(globalx2,viewingrange);
globaly2 = mulscale16(globaly2,viewingrange);
globalzd = mulscale16(globalzd,viewingrangerecip);
globalx1 = (globalx1-globalx2)*halfxdimen;
globaly1 = (globaly1-globaly2)*halfxdimen;
if ((cstat&2) == 0)
msethlineshift(x,y);
else
tsethlineshift(x,y);
/* Draw it! */
ceilspritescan(lx,rx-1);
}
if (automapping == 1) show2dsprite[spritenum>>3] |= pow2char[spritenum&7];
}
void drawmasks(void)
{
int32_t i, j, k, l, gap, xs, ys, xp, yp, yoff, yspan;
/* int32_t zs, zp; */
for(i=spritesortcnt-1; i>=0; i--) tspriteptr[i] = &tsprite[i];
for(i=spritesortcnt-1; i>=0; i--)
{
xs = tspriteptr[i]->x-globalposx;
ys = tspriteptr[i]->y-globalposy;
yp = dmulscale6(xs,cosviewingrangeglobalang,ys,sinviewingrangeglobalang);
if (yp > (4<<8))
{
xp = dmulscale6(ys,cosglobalang,-xs,singlobalang);
spritesx[i] = scale(xp+yp,xdimen<<7,yp);
}
else if ((tspriteptr[i]->cstat&48) == 0)
{
spritesortcnt--; /* Delete face sprite if on wrong side! */
if (i != spritesortcnt)
{
tspriteptr[i] = tspriteptr[spritesortcnt];
spritesx[i] = spritesx[spritesortcnt];
spritesy[i] = spritesy[spritesortcnt];
}
continue;
}
spritesy[i] = yp;
}
gap = 1;
while (gap < spritesortcnt) gap = (gap<<1)+1;
for(gap>>=1; gap>0; gap>>=1) /* Sort sprite list */
for(i=0; i<spritesortcnt-gap; i++)
for(l=i; l>=0; l-=gap)
{
if (spritesy[l] <= spritesy[l+gap]) break;
swaplong((int32_t *)&tspriteptr[l],(int32_t *)&tspriteptr[l+gap]);
swaplong(&spritesx[l],&spritesx[l+gap]);
swaplong(&spritesy[l],&spritesy[l+gap]);
}
if (spritesortcnt > 0)
spritesy[spritesortcnt] = (spritesy[spritesortcnt-1]^1);
ys = spritesy[0];
i = 0;
for(j=1; j<=spritesortcnt; j++)
{
if (spritesy[j] == ys) continue;
ys = spritesy[j];
if (j > i+1)
{
for(k=i; k<j; k++)
{
spritesz[k] = tspriteptr[k]->z;
if ((tspriteptr[k]->cstat&48) != 32)
{
yoff = (long)((int8_t )((picanm[tspriteptr[k]->picnum]>>16)&255))+((long)tspriteptr[k]->yoffset);
spritesz[k] -= ((yoff*tspriteptr[k]->yrepeat)<<2);
yspan = (tilesizy[tspriteptr[k]->picnum]*tspriteptr[k]->yrepeat<<2);
if (!(tspriteptr[k]->cstat&128)) spritesz[k] -= (yspan>>1);
if (klabs(spritesz[k]-globalposz) < (yspan>>1)) spritesz[k] = globalposz;
}
}
for(k=i+1; k<j; k++)
for(l=i; l<k; l++)
if (klabs(spritesz[k]-globalposz) < klabs(spritesz[l]-globalposz))
{
swaplong((int32_t *)&tspriteptr[k],(int32_t *)&tspriteptr[l]);
swaplong(&spritesx[k],&spritesx[l]);
swaplong(&spritesy[k],&spritesy[l]);
swaplong(&spritesz[k],&spritesz[l]);
}
for(k=i+1; k<j; k++)
for(l=i; l<k; l++)
if (tspriteptr[k]->statnum < tspriteptr[l]->statnum)
{
swaplong((int32_t *)&tspriteptr[k],(int32_t *)&tspriteptr[l]);
swaplong(&spritesx[k],&spritesx[l]);
swaplong(&spritesy[k],&spritesy[l]);
}
}
i = j;
}
while ((spritesortcnt > 0) && (maskwallcnt > 0)) /* While BOTH > 0 */
{
j = maskwall[maskwallcnt-1];
if (spritewallfront(tspriteptr[spritesortcnt-1],(long)thewall[j]) == 0)
drawsprite(--spritesortcnt);
else
{
/* Check to see if any sprites behind the masked wall... */
k = -1;
gap = 0;
for(i=spritesortcnt-2; i>=0; i--)
if ((xb1[j] <= (spritesx[i]>>8)) && ((spritesx[i]>>8) <= xb2[j]))
if (spritewallfront(tspriteptr[i],(long)thewall[j]) == 0)
{
drawsprite(i);
tspriteptr[i]->owner = -1;
k = i;
gap++;
}
if (k >= 0) /* remove holes in sprite list */
{
for(i=k; i<spritesortcnt; i++)
if (tspriteptr[i]->owner >= 0)
{
if (i > k)
{
tspriteptr[k] = tspriteptr[i];
spritesx[k] = spritesx[i];
spritesy[k] = spritesy[i];
}
k++;
}
spritesortcnt -= gap;
}
/* finally safe to draw the masked wall */
drawmaskwall(--maskwallcnt);
}
}
while (spritesortcnt > 0) drawsprite(--spritesortcnt);
while (maskwallcnt > 0) drawmaskwall(--maskwallcnt);
}
int setsprite(short spritenum, int32_t newx, int32_t newy, int32_t newz)
{
short tempsectnum;
sprite[spritenum].x = newx;
sprite[spritenum].y = newy;
sprite[spritenum].z = newz;
tempsectnum = sprite[spritenum].sectnum;
updatesector(newx,newy,&tempsectnum);
if (tempsectnum < 0)
return(-1);
if (tempsectnum != sprite[spritenum].sectnum)
changespritesect(spritenum,tempsectnum);
return(0);
}
void initspritelists(void)
{
int32_t i;
for (i=0; i<MAXSECTORS; i++) /* Init doubly-linked sprite sector lists */
headspritesect[i] = -1;
headspritesect[MAXSECTORS] = 0;
for(i=0; i<MAXSPRITES; i++)
{
prevspritesect[i] = i-1;
nextspritesect[i] = i+1;
sprite[i].sectnum = MAXSECTORS;
}
prevspritesect[0] = -1;
nextspritesect[MAXSPRITES-1] = -1;
for(i=0; i<MAXSTATUS; i++) /* Init doubly-linked sprite status lists */
headspritestat[i] = -1;
headspritestat[MAXSTATUS] = 0;
for(i=0; i<MAXSPRITES; i++)
{
prevspritestat[i] = i-1;
nextspritestat[i] = i+1;
sprite[i].statnum = MAXSTATUS;
}
prevspritestat[0] = -1;
nextspritestat[MAXSPRITES-1] = -1;
}
int insertsprite(short sectnum, short statnum)
{
insertspritestat(statnum);
return(insertspritesect(sectnum));
}
int insertspritesect(short sectnum)
{
short blanktouse;
if ((sectnum >= MAXSECTORS) || (headspritesect[MAXSECTORS] == -1))
return(-1); /* list full */
blanktouse = headspritesect[MAXSECTORS];
headspritesect[MAXSECTORS] = nextspritesect[blanktouse];
if (headspritesect[MAXSECTORS] >= 0)
prevspritesect[headspritesect[MAXSECTORS]] = -1;
prevspritesect[blanktouse] = -1;
nextspritesect[blanktouse] = headspritesect[sectnum];
if (headspritesect[sectnum] >= 0)
prevspritesect[headspritesect[sectnum]] = blanktouse;
headspritesect[sectnum] = blanktouse;
sprite[blanktouse].sectnum = sectnum;
return(blanktouse);
}
int insertspritestat(short statnum)
{
short blanktouse;
if ((statnum >= MAXSTATUS) || (headspritestat[MAXSTATUS] == -1))
return(-1); /* list full */
blanktouse = headspritestat[MAXSTATUS];
headspritestat[MAXSTATUS] = nextspritestat[blanktouse];
if (headspritestat[MAXSTATUS] >= 0)
prevspritestat[headspritestat[MAXSTATUS]] = -1;
prevspritestat[blanktouse] = -1;
nextspritestat[blanktouse] = headspritestat[statnum];
if (headspritestat[statnum] >= 0)
prevspritestat[headspritestat[statnum]] = blanktouse;
headspritestat[statnum] = blanktouse;
sprite[blanktouse].statnum = statnum;
return(blanktouse);
}
int deletesprite(short spritenum)
{
deletespritestat(spritenum);
return(deletespritesect(spritenum));
}
int deletespritesect(short deleteme)
{
if (sprite[deleteme].sectnum == MAXSECTORS)
return(-1);
if (headspritesect[sprite[deleteme].sectnum] == deleteme)
headspritesect[sprite[deleteme].sectnum] = nextspritesect[deleteme];
if (prevspritesect[deleteme] >= 0) nextspritesect[prevspritesect[deleteme]] = nextspritesect[deleteme];
if (nextspritesect[deleteme] >= 0) prevspritesect[nextspritesect[deleteme]] = prevspritesect[deleteme];
if (headspritesect[MAXSECTORS] >= 0) prevspritesect[headspritesect[MAXSECTORS]] = deleteme;
prevspritesect[deleteme] = -1;
nextspritesect[deleteme] = headspritesect[MAXSECTORS];
headspritesect[MAXSECTORS] = deleteme;
sprite[deleteme].sectnum = MAXSECTORS;
return(0);
}
int deletespritestat(short deleteme)
{
if (sprite[deleteme].statnum == MAXSTATUS)
return(-1);
if (headspritestat[sprite[deleteme].statnum] == deleteme)
headspritestat[sprite[deleteme].statnum] = nextspritestat[deleteme];
if (prevspritestat[deleteme] >= 0) nextspritestat[prevspritestat[deleteme]] = nextspritestat[deleteme];
if (nextspritestat[deleteme] >= 0) prevspritestat[nextspritestat[deleteme]] = prevspritestat[deleteme];
if (headspritestat[MAXSTATUS] >= 0) prevspritestat[headspritestat[MAXSTATUS]] = deleteme;
prevspritestat[deleteme] = -1;
nextspritestat[deleteme] = headspritestat[MAXSTATUS];
headspritestat[MAXSTATUS] = deleteme;
sprite[deleteme].statnum = MAXSTATUS;
return(0);
}
int changespritesect(short spritenum, short newsectnum)
{
if ((newsectnum < 0) || (newsectnum > MAXSECTORS)) return(-1);
if (sprite[spritenum].sectnum == newsectnum) return(0);
if (sprite[spritenum].sectnum == MAXSECTORS) return(-1);
if (deletespritesect(spritenum) < 0) return(-1);
insertspritesect(newsectnum);
return(0);
}
int changespritestat(short spritenum, short newstatnum)
{
if ((newstatnum < 0) || (newstatnum > MAXSTATUS)) return(-1);
if (sprite[spritenum].statnum == newstatnum) return(0);
if (sprite[spritenum].statnum == MAXSTATUS) return(-1);
if (deletespritestat(spritenum) < 0) return(-1);
insertspritestat(newstatnum);
return(0);
}
int nextsectorneighborz(short sectnum, int32_t thez,
short topbottom, short direction)
{
walltype *wal;
int32_t i, testz, nextz;
short sectortouse;
if (direction == 1) nextz = 0x7fffffff;
else nextz = 0x80000000;
sectortouse = -1;
wal = &wall[sector[sectnum].wallptr];
i = sector[sectnum].wallnum;
do
{
if (wal->nextsector >= 0)
{
if (topbottom == 1)
{
testz = sector[wal->nextsector].floorz;
if (direction == 1)
{
if ((testz > thez) && (testz < nextz))
{
nextz = testz;
sectortouse = wal->nextsector;
}
}
else
{
if ((testz < thez) && (testz > nextz))
{
nextz = testz;
sectortouse = wal->nextsector;
}
}
}
else
{
testz = sector[wal->nextsector].ceilingz;
if (direction == 1)
{
if ((testz > thez) && (testz < nextz))
{
nextz = testz;
sectortouse = wal->nextsector;
}
}
else
{
if ((testz < thez) && (testz > nextz))
{
nextz = testz;
sectortouse = wal->nextsector;
}
}
}
}
wal++;
i--;
} while (i != 0);
return(sectortouse);
}
int cansee(int32_t x1, int32_t y1, int32_t z1, short sect1,
int32_t x2, int32_t y2, int32_t z2, short sect2)
{
sectortype *sec;
walltype *wal, *wal2;
int32_t i, cnt, nexts, x, y, z, cz, fz, dasectnum, dacnt, danum;
int32_t x21, y21, z21, x31, y31, x34, y34, bot, t;
if ((x1 == x2) && (y1 == y2)) return(sect1 == sect2);
x21 = x2-x1;
y21 = y2-y1;
z21 = z2-z1;
clipsectorlist[0] = sect1;
danum = 1;
for(dacnt=0; dacnt<danum; dacnt++)
{
dasectnum = clipsectorlist[dacnt];
sec = §or[dasectnum];
for(cnt=sec->wallnum,wal=&wall[sec->wallptr]; cnt>0; cnt--,wal++)
{
wal2 = &wall[wal->point2];
x31 = wal->x-x1;
x34 = wal->x-wal2->x;
y31 = wal->y-y1;
y34 = wal->y-wal2->y;
bot = y21*x34-x21*y34;
if (bot <= 0) continue;
t = y21*x31-x21*y31;
if ((unsigned)t >= (unsigned)bot) continue;
t = y31*x34-x31*y34;
if ((unsigned)t >= (unsigned)bot) continue;
nexts = wal->nextsector;
if ((nexts < 0) || (wal->cstat&32)) return(0);
t = divscale24(t,bot);
x = x1 + mulscale24(x21,t);
y = y1 + mulscale24(y21,t);
z = z1 + mulscale24(z21,t);
getzsofslope((short)dasectnum,x,y,&cz,&fz);
if ((z <= cz) || (z >= fz)) return(0);
getzsofslope((short)nexts,x,y,&cz,&fz);
if ((z <= cz) || (z >= fz)) return(0);
for(i=danum-1; i>=0; i--) if (clipsectorlist[i] == nexts) break;
if (i < 0) clipsectorlist[danum++] = nexts;
}
}
for(i=danum-1; i>=0; i--) if (clipsectorlist[i] == sect2) return(1);
return(0);
}
int lintersect(int32_t x1, int32_t y1, int32_t z1, int32_t x2, int32_t y2, int32_t z2,
int32_t x3, int32_t y3, int32_t x4, int32_t y4, int32_t *intx,
int32_t *inty, int32_t *intz)
{ /* p1 to p2 is a line segment */
int32_t x21, y21, x34, y34, x31, y31, bot, topt, topu, t;
x21 = x2-x1;
x34 = x3-x4;
y21 = y2-y1;
y34 = y3-y4;
bot = x21*y34 - y21*x34;
if (bot >= 0)
{
if (bot == 0) return(0);
x31 = x3-x1;
y31 = y3-y1;
topt = x31*y34 - y31*x34;
if ((topt < 0) || (topt >= bot)) return(0);
topu = x21*y31 - y21*x31;
if ((topu < 0) || (topu >= bot)) return(0);
}
else
{
x31 = x3-x1;
y31 = y3-y1;
topt = x31*y34 - y31*x34;
if ((topt > 0) || (topt <= bot)) return(0);
topu = x21*y31 - y21*x31;
if ((topu > 0) || (topu <= bot)) return(0);
}
t = divscale24(topt,bot);
*intx = x1 + mulscale24(x21,t);
*inty = y1 + mulscale24(y21,t);
*intz = z1 + mulscale24(z2-z1,t);
return(1);
}
int rintersect(int32_t x1, int32_t y1, int32_t z1, int32_t vx, int32_t vy, int32_t vz,
int32_t x3, int32_t y3, int32_t x4, int32_t y4, int32_t *intx,
int32_t *inty, int32_t *intz)
{ /* p1 towards p2 is a ray */
int32_t x34, y34, x31, y31, bot, topt, topu, t;
x34 = x3-x4;
y34 = y3-y4;
bot = vx*y34 - vy*x34;
if (bot >= 0)
{
if (bot == 0) return(0);
x31 = x3-x1;
y31 = y3-y1;
topt = x31*y34 - y31*x34;
if (topt < 0) return(0);
topu = vx*y31 - vy*x31;
if ((topu < 0) || (topu >= bot)) return(0);
}
else
{
x31 = x3-x1;
y31 = y3-y1;
topt = x31*y34 - y31*x34;
if (topt > 0) return(0);
topu = vx*y31 - vy*x31;
if ((topu > 0) || (topu <= bot)) return(0);
}
t = divscale16(topt,bot);
*intx = x1 + mulscale16(vx,t);
*inty = y1 + mulscale16(vy,t);
*intz = z1 + mulscale16(vz,t);
return(1);
}
int hitscan(int32_t xs, int32_t ys, int32_t zs, short sectnum,
int32_t vx, int32_t vy, int32_t vz,
short *hitsect, short *hitwall, short *hitsprite,
int32_t *hitx, int32_t *hity, int32_t *hitz, uint32_t cliptype)
{
sectortype *sec;
walltype *wal, *wal2;
spritetype *spr;
int32_t z, zz, x1, y1=0, z1=0, x2, y2, x3, y3, x4, y4, intx, inty, intz;
int32_t topt, topu, bot, dist, offx, offy, cstat;
int32_t i, j, k, l, tilenum, xoff, yoff, dax, day, daz, daz2;
int32_t ang, cosang, sinang, xspan, yspan, xrepeat, yrepeat;
int32_t dawalclipmask, dasprclipmask;
short tempshortcnt, tempshortnum, dasector, startwall, endwall;
short nextsector;
uint8_t clipyou;
*hitsect = -1;
*hitwall = -1;
*hitsprite = -1;
if (sectnum < 0) return(-1);
*hitx = hitscangoalx;
*hity = hitscangoaly;
dawalclipmask = (cliptype&65535);
dasprclipmask = (cliptype>>16);
clipsectorlist[0] = sectnum;
tempshortcnt = 0;
tempshortnum = 1;
do
{
dasector = clipsectorlist[tempshortcnt];
sec = §or[dasector];
x1 = 0x7fffffff;
if (sec->ceilingstat&2)
{
wal = &wall[sec->wallptr];
wal2 = &wall[wal->point2];
dax = wal2->x-wal->x;
day = wal2->y-wal->y;
i = nsqrtasm(dax*dax+day*day);
if (i == 0) continue;
i = divscale15(sec->ceilingheinum,i);
dax *= i;
day *= i;
j = (vz<<8)-dmulscale15(dax,vy,-day,vx);
if (j != 0)
{
i = ((sec->ceilingz-zs)<<8)+dmulscale15(dax,ys-wal->y,-day,xs-wal->x);
if (((i^j) >= 0) && ((klabs(i)>>1) < klabs(j)))
{
i = divscale30(i,j);
x1 = xs + mulscale30(vx,i);
y1 = ys + mulscale30(vy,i);
z1 = zs + mulscale30(vz,i);
}
}
}
else if ((vz < 0) && (zs >= sec->ceilingz))
{
z1 = sec->ceilingz;
i = z1-zs;
if ((klabs(i)>>1) < -vz)
{
i = divscale30(i,vz);
x1 = xs + mulscale30(vx,i);
y1 = ys + mulscale30(vy,i);
}
}
if ((x1 != 0x7fffffff) && (klabs(x1-xs)+klabs(y1-ys) < klabs((*hitx)-xs)+klabs((*hity)-ys)))
if (inside(x1,y1,dasector) != 0)
{
*hitsect = dasector;
*hitwall = -1;
*hitsprite = -1;
*hitx = x1;
*hity = y1;
*hitz = z1;
}
x1 = 0x7fffffff;
if (sec->floorstat&2)
{
wal = &wall[sec->wallptr];
wal2 = &wall[wal->point2];
dax = wal2->x-wal->x;
day = wal2->y-wal->y;
i = nsqrtasm(dax*dax+day*day);
if (i == 0) continue;
i = divscale15(sec->floorheinum,i);
dax *= i;
day *= i;
j = (vz<<8)-dmulscale15(dax,vy,-day,vx);
if (j != 0)
{
i = ((sec->floorz-zs)<<8)+dmulscale15(dax,ys-wal->y,-day,xs-wal->x);
if (((i^j) >= 0) && ((klabs(i)>>1) < klabs(j)))
{
i = divscale30(i,j);
x1 = xs + mulscale30(vx,i);
y1 = ys + mulscale30(vy,i);
z1 = zs + mulscale30(vz,i);
}
}
}
else if ((vz > 0) && (zs <= sec->floorz))
{
z1 = sec->floorz;
i = z1-zs;
if ((klabs(i)>>1) < vz)
{
i = divscale30(i,vz);
x1 = xs + mulscale30(vx,i);
y1 = ys + mulscale30(vy,i);
}
}
if ((x1 != 0x7fffffff) && (klabs(x1-xs)+klabs(y1-ys) < klabs((*hitx)-xs)+klabs((*hity)-ys)))
if (inside(x1,y1,dasector) != 0)
{
*hitsect = dasector;
*hitwall = -1;
*hitsprite = -1;
*hitx = x1;
*hity = y1;
*hitz = z1;
}
startwall = sec->wallptr;
endwall = startwall + sec->wallnum;
for(z=startwall,wal=&wall[startwall]; z<endwall; z++,wal++)
{
wal2 = &wall[wal->point2];
x1 = wal->x;
y1 = wal->y;
x2 = wal2->x;
y2 = wal2->y;
if ((x1-xs)*(y2-ys) < (x2-xs)*(y1-ys)) continue;
if (rintersect(xs,ys,zs,vx,vy,vz,x1,y1,x2,y2,&intx,&inty,&intz) == 0) continue;
if (klabs(intx-xs)+klabs(inty-ys) >= klabs((*hitx)-xs)+klabs((*hity)-ys)) continue;
nextsector = wal->nextsector;
if ((nextsector < 0) || (wal->cstat&dawalclipmask))
{
*hitsect = dasector;
*hitwall = z;
*hitsprite = -1;
*hitx = intx;
*hity = inty;
*hitz = intz;
continue;
}
getzsofslope(nextsector,intx,inty,&daz,&daz2);
if ((intz <= daz) || (intz >= daz2))
{
*hitsect = dasector;
*hitwall = z;
*hitsprite = -1;
*hitx = intx;
*hity = inty;
*hitz = intz;
continue;
}
for(zz=tempshortnum-1; zz>=0; zz--)
if (clipsectorlist[zz] == nextsector) break;
if (zz < 0) clipsectorlist[tempshortnum++] = nextsector;
}
for(z=headspritesect[dasector]; z>=0; z=nextspritesect[z])
{
spr = &sprite[z];
cstat = spr->cstat;
if ((cstat&dasprclipmask) == 0) continue;
x1 = spr->x;
y1 = spr->y;
z1 = spr->z;
switch(cstat&48)
{
case 0:
topt = vx*(x1-xs) + vy*(y1-ys);
if (topt <= 0) continue;
bot = vx*vx + vy*vy;
if (bot == 0) continue;
intz = zs+scale(vz,topt,bot);
i = (tilesizy[spr->picnum]*spr->yrepeat<<2);
if (cstat&128) z1 += (i>>1);
if (picanm[spr->picnum]&0x00ff0000) z1 -= ((long)((int8_t )((picanm[spr->picnum]>>16)&255))*spr->yrepeat<<2);
if ((intz > z1) || (intz < z1-i)) continue;
topu = vx*(y1-ys) - vy*(x1-xs);
offx = scale(vx,topu,bot);
offy = scale(vy,topu,bot);
dist = offx*offx + offy*offy;
i = tilesizx[spr->picnum]*spr->xrepeat;
i *= i;
if (dist > (i>>7)) continue;
intx = xs + scale(vx,topt,bot);
inty = ys + scale(vy,topt,bot);
if (klabs(intx-xs)+klabs(inty-ys) > klabs((*hitx)-xs)+klabs((*hity)-ys)) continue;
*hitsect = dasector;
*hitwall = -1;
*hitsprite = z;
*hitx = intx;
*hity = inty;
*hitz = intz;
break;
case 16:
/*
* These lines get the 2 points of the rotated sprite
* Given: (x1, y1) starts out as the center point
*/
tilenum = spr->picnum;
xoff = (long)((int8_t )((picanm[tilenum]>>8)&255))+((long)spr->xoffset);
if ((cstat&4) > 0) xoff = -xoff;
k = spr->ang;
l = spr->xrepeat;
dax = sintable[k&2047]*l;
day = sintable[(k+1536)&2047]*l;
l = tilesizx[tilenum];
k = (l>>1)+xoff;
x1 -= mulscale16(dax,k);
x2 = x1+mulscale16(dax,l);
y1 -= mulscale16(day,k);
y2 = y1+mulscale16(day,l);
if ((cstat&64) != 0) /* back side of 1-way sprite */
if ((x1-xs)*(y2-ys) < (x2-xs)*(y1-ys)) continue;
if (rintersect(xs,ys,zs,vx,vy,vz,x1,y1,x2,y2,&intx,&inty,&intz) == 0) continue;
if (klabs(intx-xs)+klabs(inty-ys) > klabs((*hitx)-xs)+klabs((*hity)-ys)) continue;
k = ((tilesizy[spr->picnum]*spr->yrepeat)<<2);
if (cstat&128) daz = spr->z+(k>>1);
else daz = spr->z;
if (picanm[spr->picnum]&0x00ff0000) daz -= ((long)((int8_t )((picanm[spr->picnum]>>16)&255))*spr->yrepeat<<2);
if ((intz < daz) && (intz > daz-k))
{
*hitsect = dasector;
*hitwall = -1;
*hitsprite = z;
*hitx = intx;
*hity = inty;
*hitz = intz;
}
break;
case 32:
if (vz == 0) continue;
intz = z1;
if (((intz-zs)^vz) < 0) continue;
if ((cstat&64) != 0)
if ((zs > intz) == ((cstat&8)==0)) continue;
intx = xs+scale(intz-zs,vx,vz);
inty = ys+scale(intz-zs,vy,vz);
if (klabs(intx-xs)+klabs(inty-ys) > klabs((*hitx)-xs)+klabs((*hity)-ys)) continue;
tilenum = spr->picnum;
xoff = (long)((int8_t )((picanm[tilenum]>>8)&255))+((long)spr->xoffset);
yoff = (long)((int8_t )((picanm[tilenum]>>16)&255))+((long)spr->yoffset);
if ((cstat&4) > 0) xoff = -xoff;
if ((cstat&8) > 0) yoff = -yoff;
ang = spr->ang;
cosang = sintable[(ang+512)&2047];
sinang = sintable[ang];
xspan = tilesizx[tilenum];
xrepeat = spr->xrepeat;
yspan = tilesizy[tilenum];
yrepeat = spr->yrepeat;
dax = ((xspan>>1)+xoff)*xrepeat;
day = ((yspan>>1)+yoff)*yrepeat;
x1 += dmulscale16(sinang,dax,cosang,day)-intx;
y1 += dmulscale16(sinang,day,-cosang,dax)-inty;
l = xspan*xrepeat;
x2 = x1 - mulscale16(sinang,l);
y2 = y1 + mulscale16(cosang,l);
l = yspan*yrepeat;
k = -mulscale16(cosang,l);
x3 = x2+k;
x4 = x1+k;
k = -mulscale16(sinang,l);
y3 = y2+k;
y4 = y1+k;
clipyou = 0;
if ((y1^y2) < 0)
{
if ((x1^x2) < 0) clipyou ^= (x1*y2<x2*y1)^(y1<y2);
else if (x1 >= 0) clipyou ^= 1;
}
if ((y2^y3) < 0)
{
if ((x2^x3) < 0) clipyou ^= (x2*y3<x3*y2)^(y2<y3);
else if (x2 >= 0) clipyou ^= 1;
}
if ((y3^y4) < 0)
{
if ((x3^x4) < 0) clipyou ^= (x3*y4<x4*y3)^(y3<y4);
else if (x3 >= 0) clipyou ^= 1;
}
if ((y4^y1) < 0)
{
if ((x4^x1) < 0) clipyou ^= (x4*y1<x1*y4)^(y4<y1);
else if (x4 >= 0) clipyou ^= 1;
}
if (clipyou != 0)
{
*hitsect = dasector;
*hitwall = -1;
*hitsprite = z;
*hitx = intx;
*hity = inty;
*hitz = intz;
}
break;
}
}
tempshortcnt++;
} while (tempshortcnt < tempshortnum);
return(0);
}
int neartag(int32_t xs, int32_t ys, int32_t zs, short sectnum, short ange,
short *neartagsector, short *neartagwall, short *neartagsprite,
int32_t *neartaghitdist, int32_t neartagrange, uint8_t tagsearch)
{
walltype *wal, *wal2;
spritetype *spr;
int32_t i, z, zz, xe, ye, ze, x1, y1, z1, x2, y2, intx, inty, intz;
int32_t topt, topu, bot, dist, offx, offy, vx, vy, vz;
short tempshortcnt, tempshortnum, dasector, startwall, endwall;
short nextsector, good;
*neartagsector = -1;
*neartagwall = -1;
*neartagsprite = -1;
*neartaghitdist = 0;
if (sectnum < 0) return(0);
if ((tagsearch < 1) || (tagsearch > 3)) return(0);
vx = mulscale14(sintable[(ange+2560)&2047],neartagrange);
xe = xs+vx;
vy = mulscale14(sintable[(ange+2048)&2047],neartagrange);
ye = ys+vy;
vz = 0;
ze = 0;
clipsectorlist[0] = sectnum;
tempshortcnt = 0;
tempshortnum = 1;
do
{
dasector = clipsectorlist[tempshortcnt];
startwall = sector[dasector].wallptr;
endwall = startwall + sector[dasector].wallnum - 1;
for(z=startwall,wal=&wall[startwall]; z<=endwall; z++,wal++)
{
wal2 = &wall[wal->point2];
x1 = wal->x;
y1 = wal->y;
x2 = wal2->x;
y2 = wal2->y;
nextsector = wal->nextsector;
good = 0;
if (nextsector >= 0)
{
if ((tagsearch&1) && sector[nextsector].lotag) good |= 1;
if ((tagsearch&2) && sector[nextsector].hitag) good |= 1;
}
if ((tagsearch&1) && wal->lotag) good |= 2;
if ((tagsearch&2) && wal->hitag) good |= 2;
if ((good == 0) && (nextsector < 0)) continue;
if ((x1-xs)*(y2-ys) < (x2-xs)*(y1-ys)) continue;
if (lintersect(xs,ys,zs,xe,ye,ze,x1,y1,x2,y2,&intx,&inty,&intz) == 1)
{
if (good != 0)
{
if (good&1) *neartagsector = nextsector;
if (good&2) *neartagwall = z;
*neartaghitdist = dmulscale14(intx-xs,sintable[(ange+2560)&2047],inty-ys,sintable[(ange+2048)&2047]);
xe = intx;
ye = inty;
ze = intz;
}
if (nextsector >= 0)
{
for(zz=tempshortnum-1; zz>=0; zz--)
if (clipsectorlist[zz] == nextsector) break;
if (zz < 0) clipsectorlist[tempshortnum++] = nextsector;
}
}
}
for(z=headspritesect[dasector]; z>=0; z=nextspritesect[z])
{
spr = &sprite[z];
good = 0;
if ((tagsearch&1) && spr->lotag) good |= 1;
if ((tagsearch&2) && spr->hitag) good |= 1;
if (good != 0)
{
x1 = spr->x;
y1 = spr->y;
z1 = spr->z;
topt = vx*(x1-xs) + vy*(y1-ys);
if (topt > 0)
{
bot = vx*vx + vy*vy;
if (bot != 0)
{
intz = zs+scale(vz,topt,bot);
i = tilesizy[spr->picnum]*spr->yrepeat;
if (spr->cstat&128) z1 += (i<<1);
if (picanm[spr->picnum]&0x00ff0000) z1 -= ((long)((int8_t )((picanm[spr->picnum]>>16)&255))*spr->yrepeat<<2);
if ((intz <= z1) && (intz >= z1-(i<<2)))
{
topu = vx*(y1-ys) - vy*(x1-xs);
offx = scale(vx,topu,bot);
offy = scale(vy,topu,bot);
dist = offx*offx + offy*offy;
i = (tilesizx[spr->picnum]*spr->xrepeat);
i *= i;
if (dist <= (i>>7))
{
intx = xs + scale(vx,topt,bot);
inty = ys + scale(vy,topt,bot);
if (klabs(intx-xs)+klabs(inty-ys) < klabs(xe-xs)+klabs(ye-ys))
{
*neartagsprite = z;
*neartaghitdist = dmulscale14(intx-xs,sintable[(ange+2560)&2047],inty-ys,sintable[(ange+2048)&2047]);
xe = intx;
ye = inty;
ze = intz;
}
}
}
}
}
}
}
tempshortcnt++;
} while (tempshortcnt < tempshortnum);
return(0);
}
void dragpoint(short pointhighlight, int32_t dax, int32_t day)
{
short cnt, tempshort;
wall[pointhighlight].x = dax;
wall[pointhighlight].y = day;
cnt = MAXWALLS;
tempshort = pointhighlight; /* search points CCW */
do
{
if (wall[tempshort].nextwall >= 0)
{
tempshort = wall[wall[tempshort].nextwall].point2;
wall[tempshort].x = dax;
wall[tempshort].y = day;
}
else
{
tempshort = pointhighlight; /* search points CW if not searched all the way around */
do
{
if (wall[lastwall(tempshort)].nextwall >= 0)
{
tempshort = wall[lastwall(tempshort)].nextwall;
wall[tempshort].x = dax;
wall[tempshort].y = day;
}
else
{
break;
}
cnt--;
}
while ((tempshort != pointhighlight) && (cnt > 0));
break;
}
cnt--;
}
while ((tempshort != pointhighlight) && (cnt > 0));
}
int lastwall(short point)
{
int32_t i, j, cnt;
if ((point > 0) && (wall[point-1].point2 == point)) return(point-1);
i = point;
cnt = MAXWALLS;
do
{
j = wall[i].point2;
if (j == point) return(i);
i = j;
cnt--;
} while (cnt > 0);
return(point);
}
#define addclipline(dax1, day1, dax2, day2, daoval) \
{ \
clipit[clipnum].x1 = dax1; clipit[clipnum].y1 = day1; \
clipit[clipnum].x2 = dax2; clipit[clipnum].y2 = day2; \
clipobjectval[clipnum] = daoval; \
clipnum++; \
} \
static void keepaway (int32_t *x, int32_t *y, int32_t w)
{
int32_t dx, dy, ox, oy, x1, y1;
uint8_t first;
x1 = clipit[w].x1;
dx = clipit[w].x2-x1;
y1 = clipit[w].y1;
dy = clipit[w].y2-y1;
ox = ksgn(-dy);
oy = ksgn(dx);
first = (klabs(dx) <= klabs(dy));
while (1)
{
if (dx*(*y-y1) > (*x-x1)*dy) return;
if (first == 0) *x += ox;
else *y += oy;
first ^= 1;
}
}
static int raytrace(int32_t x3, int32_t y3, int32_t *x4, int32_t *y4)
{
int32_t x1, y1, x2, y2, bot, topu, nintx, ninty, cnt, z, hitwall;
int32_t x21, y21, x43, y43;
hitwall = -1;
for(z=clipnum-1; z>=0; z--)
{
x1 = clipit[z].x1;
x2 = clipit[z].x2;
x21 = x2-x1;
y1 = clipit[z].y1;
y2 = clipit[z].y2;
y21 = y2-y1;
topu = x21*(y3-y1) - (x3-x1)*y21;
if (topu <= 0) continue;
if (x21*(*y4-y1) > (*x4-x1)*y21) continue;
x43 = *x4-x3;
y43 = *y4-y3;
if (x43*(y1-y3) > (x1-x3)*y43) continue;
if (x43*(y2-y3) <= (x2-x3)*y43) continue;
bot = x43*y21 - x21*y43;
if (bot == 0) continue;
cnt = 256;
do
{
cnt--;
if (cnt < 0) {
*x4 = x3;
*y4 = y3;
return(z);
}
nintx = x3 + scale(x43,topu,bot);
ninty = y3 + scale(y43,topu,bot);
topu--;
} while (x21*(ninty-y1) <= (nintx-x1)*y21);
if (klabs(x3-nintx)+klabs(y3-ninty) < klabs(x3-*x4)+klabs(y3-*y4))
{
*x4 = nintx;
*y4 = ninty;
hitwall = z;
}
}
return(hitwall);
}
/* !!! ugh...move this var into clipmove as a parameter, and update build2.txt! */
int32_t clipmoveboxtracenum = 3;
int clipmove (int32_t *x, int32_t *y, int32_t *z, short *sectnum,
int32_t xvect, int32_t yvect, int32_t walldist, int32_t ceildist,
int32_t flordist, uint32_t cliptype)
{
walltype *wal, *wal2;
spritetype *spr;
sectortype *sec, *sec2;
int32_t i, j, templong1, templong2;
int32_t oxvect, oyvect, goalx, goaly, intx, inty, lx, ly, retval;
int32_t k, l, clipsectcnt, startwall, endwall, cstat, dasect;
int32_t x1, y1, x2, y2, cx, cy, rad, xmin, ymin, xmax, ymax, daz, daz2;
int32_t bsz, dax, day, xoff, yoff, xspan, yspan, cosang, sinang, tilenum;
int32_t xrepeat, yrepeat, gx, gy, dx, dy, dasprclipmask, dawalclipmask;
int32_t hitwall, cnt, clipyou;
if (((xvect|yvect) == 0) || (*sectnum < 0)) return(0);
retval = 0;
oxvect = xvect;
oyvect = yvect;
goalx = (*x) + (xvect>>14);
goaly = (*y) + (yvect>>14);
clipnum = 0;
cx = (((*x)+goalx)>>1);
cy = (((*y)+goaly)>>1);
/* Extra walldist for sprites on sector lines */
gx = goalx-(*x);
gy = goaly-(*y);
rad = nsqrtasm(gx*gx + gy*gy) + MAXCLIPDIST+walldist + 8;
xmin = cx-rad;
ymin = cy-rad;
xmax = cx+rad;
ymax = cy+rad;
dawalclipmask = (cliptype&65535); /* CLIPMASK0 = 0x00010001 */
dasprclipmask = (cliptype>>16); /* CLIPMASK1 = 0x01000040 */
clipsectorlist[0] = (*sectnum);
clipsectcnt = 0;
clipsectnum = 1;
do
{
dasect = clipsectorlist[clipsectcnt++];
sec = §or[dasect];
startwall = sec->wallptr;
endwall = startwall + sec->wallnum;
for(j=startwall,wal=&wall[startwall]; j<endwall; j++,wal++)
{
wal2 = &wall[wal->point2];
if ((wal->x < xmin) && (wal2->x < xmin)) continue;
if ((wal->x > xmax) && (wal2->x > xmax)) continue;
if ((wal->y < ymin) && (wal2->y < ymin)) continue;
if ((wal->y > ymax) && (wal2->y > ymax)) continue;
x1 = wal->x;
y1 = wal->y;
x2 = wal2->x;
y2 = wal2->y;
dx = x2-x1;
dy = y2-y1;
if (dx*((*y)-y1) < ((*x)-x1)*dy) continue; /* If wall's not facing you */
if (dx > 0) dax = dx*(ymin-y1);
else dax = dx*(ymax-y1);
if (dy > 0) day = dy*(xmax-x1);
else day = dy*(xmin-x1);
if (dax >= day) continue;
clipyou = 0;
if ((wal->nextsector < 0) || (wal->cstat&dawalclipmask)) clipyou = 1;
else if (editstatus == 0)
{
if (rintersect(*x,*y,0,gx,gy,0,x1,y1,x2,y2,&dax,&day,&daz) == 0)
dax = *x, day = *y;
daz = getflorzofslope((short)dasect,dax,day);
daz2 = getflorzofslope(wal->nextsector,dax,day);
sec2 = §or[wal->nextsector];
if (daz2 < daz-(1<<8))
if ((sec2->floorstat&1) == 0)
if ((*z) >= daz2-(flordist-1)) clipyou = 1;
if (clipyou == 0)
{
daz = getceilzofslope((short)dasect,dax,day);
daz2 = getceilzofslope(wal->nextsector,dax,day);
if (daz2 > daz+(1<<8))
if ((sec2->ceilingstat&1) == 0)
if ((*z) <= daz2+(ceildist-1)) clipyou = 1;
}
}
if (clipyou)
{
/* Add 2 boxes at endpoints */
bsz = walldist;
if (gx < 0) bsz = -bsz;
addclipline(x1-bsz,y1-bsz,x1-bsz,y1+bsz,(short)j+32768);
addclipline(x2-bsz,y2-bsz,x2-bsz,y2+bsz,(short)j+32768);
bsz = walldist;
if (gy < 0) bsz = -bsz;
addclipline(x1+bsz,y1-bsz,x1-bsz,y1-bsz,(short)j+32768);
addclipline(x2+bsz,y2-bsz,x2-bsz,y2-bsz,(short)j+32768);
dax = walldist;
if (dy > 0) dax = -dax;
day = walldist;
if (dx < 0) day = -day;
addclipline(x1+dax,y1+day,x2+dax,y2+day,(short)j+32768);
}
else
{
for(i=clipsectnum-1; i>=0; i--)
if (wal->nextsector == clipsectorlist[i]) break;
if (i < 0) clipsectorlist[clipsectnum++] = wal->nextsector;
}
}
for(j=headspritesect[dasect]; j>=0; j=nextspritesect[j])
{
spr = &sprite[j];
cstat = spr->cstat;
if ((cstat&dasprclipmask) == 0) continue;
x1 = spr->x;
y1 = spr->y;
switch(cstat&48)
{
case 0:
if ((x1 >= xmin) && (x1 <= xmax) && (y1 >= ymin) && (y1 <= ymax))
{
k = ((tilesizy[spr->picnum]*spr->yrepeat)<<2);
if (cstat&128) daz = spr->z+(k>>1);
else daz = spr->z;
if (picanm[spr->picnum]&0x00ff0000) daz -= ((long)((int8_t )((picanm[spr->picnum]>>16)&255))*spr->yrepeat<<2);
if (((*z) < daz+ceildist) && ((*z) > daz-k-flordist))
{
bsz = (spr->clipdist<<2)+walldist;
if (gx < 0) bsz = -bsz;
addclipline(x1-bsz,y1-bsz,x1-bsz,y1+bsz,(short)j+49152);
bsz = (spr->clipdist<<2)+walldist;
if (gy < 0) bsz = -bsz;
addclipline(x1+bsz,y1-bsz,x1-bsz,y1-bsz,(short)j+49152);
}
}
break;
case 16:
k = ((tilesizy[spr->picnum]*spr->yrepeat)<<2);
if (cstat&128) daz = spr->z+(k>>1);
else daz = spr->z;
if (picanm[spr->picnum]&0x00ff0000) daz -= ((long)((int8_t )((picanm[spr->picnum]>>16)&255))*spr->yrepeat<<2);
daz2 = daz-k;
daz += ceildist;
daz2 -= flordist;
if (((*z) < daz) && ((*z) > daz2))
{
/*
* These lines get the 2 points of the rotated sprite
* Given: (x1, y1) starts out as the center point
*/
tilenum = spr->picnum;
xoff = (long)((int8_t )((picanm[tilenum]>>8)&255))+((long)spr->xoffset);
if ((cstat&4) > 0) xoff = -xoff;
k = spr->ang;
l = spr->xrepeat;
dax = sintable[k&2047]*l;
day = sintable[(k+1536)&2047]*l;
l = tilesizx[tilenum];
k = (l>>1)+xoff;
x1 -= mulscale16(dax,k);
x2 = x1+mulscale16(dax,l);
y1 -= mulscale16(day,k);
y2 = y1+mulscale16(day,l);
if (clipinsideboxline(cx,cy,x1,y1,x2,y2,rad) != 0)
{
dax = mulscale14(sintable[(spr->ang+256+512)&2047],walldist);
day = mulscale14(sintable[(spr->ang+256)&2047],walldist);
if ((x1-(*x))*(y2-(*y)) >= (x2-(*x))*(y1-(*y))) /* Front */
{
addclipline(x1+dax,y1+day,x2+day,y2-dax,(short)j+49152);
}
else
{
if ((cstat&64) != 0) continue;
addclipline(x2-dax,y2-day,x1-day,y1+dax,(short)j+49152);
}
/* Side blocker */
if ((x2-x1)*((*x)-x1) + (y2-y1)*((*y)-y1) < 0)
{
addclipline(x1-day,y1+dax,x1+dax,y1+day,(short)j+49152);
}
else if ((x1-x2)*((*x)-x2) + (y1-y2)*((*y)-y2) < 0)
{
addclipline(x2+day,y2-dax,x2-dax,y2-day,(short)j+49152);
}
}
}
break;
case 32:
daz = spr->z+ceildist;
daz2 = spr->z-flordist;
if (((*z) < daz) && ((*z) > daz2))
{
if ((cstat&64) != 0)
if (((*z) > spr->z) == ((cstat&8)==0)) continue;
tilenum = spr->picnum;
xoff = (long)((int8_t )((picanm[tilenum]>>8)&255))+((long)spr->xoffset);
yoff = (long)((int8_t )((picanm[tilenum]>>16)&255))+((long)spr->yoffset);
if ((cstat&4) > 0) xoff = -xoff;
if ((cstat&8) > 0) yoff = -yoff;
k = spr->ang;
cosang = sintable[(k+512)&2047];
sinang = sintable[k];
xspan = tilesizx[tilenum];
xrepeat = spr->xrepeat;
yspan = tilesizy[tilenum];
yrepeat = spr->yrepeat;
dax = ((xspan>>1)+xoff)*xrepeat;
day = ((yspan>>1)+yoff)*yrepeat;
rxi[0] = x1 + dmulscale16(sinang,dax,cosang,day);
ryi[0] = y1 + dmulscale16(sinang,day,-cosang,dax);
l = xspan*xrepeat;
rxi[1] = rxi[0] - mulscale16(sinang,l);
ryi[1] = ryi[0] + mulscale16(cosang,l);
l = yspan*yrepeat;
k = -mulscale16(cosang,l);
rxi[2] = rxi[1]+k;
rxi[3] = rxi[0]+k;
k = -mulscale16(sinang,l);
ryi[2] = ryi[1]+k;
ryi[3] = ryi[0]+k;
dax = mulscale14(sintable[(spr->ang-256+512)&2047],walldist);
day = mulscale14(sintable[(spr->ang-256)&2047],walldist);
if ((rxi[0]-(*x))*(ryi[1]-(*y)) < (rxi[1]-(*x))*(ryi[0]-(*y)))
{
if (clipinsideboxline(cx,cy,rxi[1],ryi[1],rxi[0],ryi[0],rad) != 0)
addclipline(rxi[1]-day,ryi[1]+dax,rxi[0]+dax,ryi[0]+day,(short)j+49152);
}
else if ((rxi[2]-(*x))*(ryi[3]-(*y)) < (rxi[3]-(*x))*(ryi[2]-(*y)))
{
if (clipinsideboxline(cx,cy,rxi[3],ryi[3],rxi[2],ryi[2],rad) != 0)
addclipline(rxi[3]+day,ryi[3]-dax,rxi[2]-dax,ryi[2]-day,(short)j+49152);
}
if ((rxi[1]-(*x))*(ryi[2]-(*y)) < (rxi[2]-(*x))*(ryi[1]-(*y)))
{
if (clipinsideboxline(cx,cy,rxi[2],ryi[2],rxi[1],ryi[1],rad) != 0)
addclipline(rxi[2]-dax,ryi[2]-day,rxi[1]-day,ryi[1]+dax,(short)j+49152);
}
else if ((rxi[3]-(*x))*(ryi[0]-(*y)) < (rxi[0]-(*x))*(ryi[3]-(*y)))
{
if (clipinsideboxline(cx,cy,rxi[0],ryi[0],rxi[3],ryi[3],rad) != 0)
addclipline(rxi[0]+dax,ryi[0]+day,rxi[3]+day,ryi[3]-dax,(short)j+49152);
}
}
break;
}
}
} while (clipsectcnt < clipsectnum);
hitwall = 0;
cnt = clipmoveboxtracenum;
do
{
intx = goalx;
inty = goaly;
if ((hitwall = raytrace(*x, *y, &intx, &inty)) >= 0)
{
lx = clipit[hitwall].x2-clipit[hitwall].x1;
ly = clipit[hitwall].y2-clipit[hitwall].y1;
templong2 = lx*lx + ly*ly;
if (templong2 > 0)
{
templong1 = (goalx-intx)*lx + (goaly-inty)*ly;
if ((klabs(templong1)>>11) < templong2)
i = divscale20(templong1,templong2);
else
i = 0;
goalx = mulscale20(lx,i)+intx;
goaly = mulscale20(ly,i)+inty;
}
templong1 = dmulscale6(lx,oxvect,ly,oyvect);
for(i=cnt+1; i<=clipmoveboxtracenum; i++)
{
j = hitwalls[i];
templong2 = dmulscale6(clipit[j].x2-clipit[j].x1,oxvect,clipit[j].y2-clipit[j].y1,oyvect);
if ((templong1^templong2) < 0)
{
updatesector(*x,*y,sectnum);
return(retval);
}
}
keepaway(&goalx, &goaly, hitwall);
xvect = ((goalx-intx)<<14);
yvect = ((goaly-inty)<<14);
if (cnt == clipmoveboxtracenum) retval = clipobjectval[hitwall];
hitwalls[cnt] = hitwall;
}
cnt--;
*x = intx;
*y = inty;
} while (((xvect|yvect) != 0) && (hitwall >= 0) && (cnt > 0));
for(j=0; j<clipsectnum; j++)
if (inside(*x,*y,clipsectorlist[j]) == 1)
{
*sectnum = clipsectorlist[j];
return(retval);
}
*sectnum = -1;
templong1 = 0x7fffffff;
for(j=numsectors-1; j>=0; j--)
if (inside(*x,*y,j) == 1)
{
if (sector[j].ceilingstat&2)
templong2 = (getceilzofslope((short)j,*x,*y)-(*z));
else
templong2 = (sector[j].ceilingz-(*z));
if (templong2 > 0)
{
if (templong2 < templong1)
{
*sectnum = j;
templong1 = templong2;
}
}
else
{
if (sector[j].floorstat&2)
templong2 = ((*z)-getflorzofslope((short)j,*x,*y));
else
templong2 = ((*z)-sector[j].floorz);
if (templong2 <= 0)
{
*sectnum = j;
return(retval);
}
if (templong2 < templong1)
{
*sectnum = j;
templong1 = templong2;
}
}
}
return(retval);
}
int pushmove(int32_t *x, int32_t *y, int32_t *z, short *sectnum,
int32_t walldist, int32_t ceildist, int32_t flordist,
uint32_t cliptype)
{
sectortype *sec, *sec2;
walltype *wal;
int32_t i, j, k, t, dx, dy, dax, day, daz, daz2, bad, dir;
int32_t dasprclipmask, dawalclipmask;
short startwall, endwall, clipsectcnt;
uint8_t bad2;
if ((*sectnum) < 0) return(-1);
dawalclipmask = (cliptype&65535);
dasprclipmask = (cliptype>>16);
k = 32;
dir = 1;
do
{
bad = 0;
clipsectorlist[0] = *sectnum;
clipsectcnt = 0;
clipsectnum = 1;
do
{
sec = §or[clipsectorlist[clipsectcnt]];
if (dir > 0)
startwall = sec->wallptr, endwall = startwall + sec->wallnum;
else
endwall = sec->wallptr, startwall = endwall + sec->wallnum;
for(i=startwall,wal=&wall[startwall]; i!=endwall; i+=dir,wal+=dir)
if (clipinsidebox(*x,*y,i,walldist-4) == 1)
{
j = 0;
if (wal->nextsector < 0) j = 1;
if (wal->cstat&dawalclipmask) j = 1;
if (j == 0)
{
sec2 = §or[wal->nextsector];
/* Find closest point on wall (dax, day) to (*x, *y) */
dax = wall[wal->point2].x-wal->x;
day = wall[wal->point2].y-wal->y;
daz = dax*((*x)-wal->x) + day*((*y)-wal->y);
if (daz <= 0)
t = 0;
else
{
daz2 = dax*dax+day*day;
if (daz >= daz2) t = (1<<30);
else t = divscale30(daz,daz2);
}
dax = wal->x + mulscale30(dax,t);
day = wal->y + mulscale30(day,t);
daz = getflorzofslope(clipsectorlist[clipsectcnt],dax,day);
daz2 = getflorzofslope(wal->nextsector,dax,day);
if ((daz2 < daz-(1<<8)) && ((sec2->floorstat&1) == 0))
if (*z >= daz2-(flordist-1)) j = 1;
daz = getceilzofslope(clipsectorlist[clipsectcnt],dax,day);
daz2 = getceilzofslope(wal->nextsector,dax,day);
if ((daz2 > daz+(1<<8)) && ((sec2->ceilingstat&1) == 0))
if (*z <= daz2+(ceildist-1)) j = 1;
}
if (j != 0)
{
j = getangle(wall[wal->point2].x-wal->x,wall[wal->point2].y-wal->y);
dx = (sintable[(j+1024)&2047]>>11);
dy = (sintable[(j+512)&2047]>>11);
bad2 = 16;
do
{
*x = (*x) + dx;
*y = (*y) + dy;
bad2--;
if (bad2 == 0) break;
} while (clipinsidebox(*x,*y,i,walldist-4) != 0);
bad = -1;
k--;
if (k <= 0) return(bad);
updatesector(*x,*y,sectnum);
}
else
{
for(j=clipsectnum-1; j>=0; j--)
if (wal->nextsector == clipsectorlist[j]) break;
if (j < 0) clipsectorlist[clipsectnum++] = wal->nextsector;
}
}
clipsectcnt++;
} while (clipsectcnt < clipsectnum);
dir = -dir;
} while (bad != 0);
return(bad);
}
/*
FCS: x and y are the new position of the entity that has just moved:
lastKnownSector is an hint (the last known sectorID of the entity).
Thanks to the "hint", the algorithm check:
1. Is (x,y) inside sectors[sectnum].
2. Flood in sectnum portal and check again if (x,y) is inside.
3. Do a linear search on sectors[sectnum] from 0 to numSectors.
Note: Inside uses cross_product and return as soon as the point switch
from one side to the other.
*/
void updatesector(int32_t x, int32_t y, short *lastKnownSector)
{
walltype *wal;
int32_t i, j;
//First check the last sector where (old_x,old_y) was before being updated to (x,y)
if (inside(x,y,*lastKnownSector) == 1)
{
//We found it and (x,y) is still in the same sector: nothing to update !
return;
}
// Seems (x,y) moved into an other sector....hopefully one connected via a portal. Let's flood in each portal.
if ((*lastKnownSector >= 0) && (*lastKnownSector < numsectors))
{
wal = &wall[sector[*lastKnownSector].wallptr];
j = sector[*lastKnownSector].wallnum;
do
{
i = wal->nextsector;
if (i >= 0)
if (inside(x,y,(short)i) == 1)
{
*lastKnownSector = i;
return;
}
wal++;
j--;
} while (j != 0);
}
//Damn that is a BIG move, still cannot find which sector (x,y) belongs to. Let's search via linear search.
for(i=numsectors-1; i>=0; i--)
{
if (inside(x,y,(short)i) == 1)
{
*lastKnownSector = i;
return;
}
}
// (x,y) is contained in NO sector. (x,y) is likely out of the map.
*lastKnownSector = -1;
}
void rotatepoint(int32_t xpivot, int32_t ypivot, int32_t x, int32_t y, short daang, int32_t *x2, int32_t *y2)
{
int32_t dacos, dasin;
dacos = sintable[(daang+2560)&2047];
dasin = sintable[(daang+2048)&2047];
x -= xpivot;
y -= ypivot;
*x2 = dmulscale14(x,dacos,-y,dasin) + xpivot;
*y2 = dmulscale14(y,dacos,x,dasin) + ypivot;
}
int initmouse(void)
{
return(moustat = setupmouse());
}
void getmousevalues(short *mousx, short *mousy, short *bstatus)
{
if (moustat == 0) {
*mousx = 0;
*mousy = 0;
*bstatus = 0;
return;
}
readmousexy(mousx,mousy);
readmousebstatus(bstatus);
}
void draw2dgrid(int32_t posxe, int32_t posye, short ange, int32_t zoome, short gride)
{
int32_t i, xp1, yp1, xp2=0, yp2, tempy, tempint;
uint8_t mask;
if (gride > 0)
{
yp1 = 200-mulscale14(posye+131072,zoome);
if (yp1 < 0) yp1 = 0;
yp2 = 200-mulscale14(posye-131072,zoome);
if (yp2 >= ydim16) yp2 = ydim16-1;
if ((yp1 < ydim16) && (yp2 >= 0) && (yp2 >= yp1))
{
setcolor16(8);
#ifdef PLATFORM_DOS
koutp(0x3ce,0x8);
#endif
tempint = ((yp1*640+pageoffset)>>3)+(int32_t)_getVideoBase();
tempy = yp2-yp1+1;
mask = 0;
xp1 = 320-mulscale14(posxe+131072,zoome);
for(i=-131072; i<=131072; i+=(2048>>gride))
{
xp2 = xp1;
xp1 = 320-mulscale14(posxe-i,zoome);
if (xp1 >= 640) break;
if (xp1 >= 0)
{
#if (defined PLATFORM_DOS)
if ((xp1|7) != (xp2|7))
{
koutp(0x3cf,mask);
if (((xp2>>3) >= 0) && ((xp2>>3) < 80))
vlin16first(templong+(xp2>>3),tempy);
mask = 0;
}
mask |= pow2char[(xp1&7)^7];
#else
drawline16(xp1, 0, xp1, tempy, 8);
#endif
}
}
if ((i >= 131072) && (xp1 < 640))
xp2 = xp1;
if ((mask != 0) && ((xp2>>3) >= 0) && ((xp2>>3) < 80))
{
/* !!! Does this code ever get hit? Do something with this! */
#ifdef PLATFORM_DOS
koutp(0x3cf,mask);
vlin16first(templong+(xp2>>3),tempy);
#else
fprintf (stderr, "STUB: %s:%d\n",__FILE__,__LINE__);
#endif
}
}
xp1 = mulscale14(posxe+131072,zoome);
xp2 = mulscale14(posxe-131072,zoome);
tempy = 0x80000000;
for(i=-131072; i<=131072; i+=(2048>>gride))
{
yp1 = (((posye-i)*zoome)>>14);
if (yp1 != tempy)
{
if ((yp1 > 200-ydim16) && (yp1 <= 200))
{
drawline16(320-xp1,200-yp1,320-xp2,200-yp1,8);
tempy = yp1;
}
}
}
}
}
void draw2dscreen(int32_t posxe, int32_t posye, short ange, int32_t zoome, short gride)
{
walltype *wal;
int32_t i, j, xp1, yp1, xp2, yp2, tempint;
uint8_t col;
if (qsetmode == 200) return;
if (editstatus == 0)
{
faketimerhandler();
clear2dscreen();
faketimerhandler();
draw2dgrid(posxe,posye,ange,zoome,gride);
}
faketimerhandler();
for(i=numwalls-1,wal=&wall[i]; i>=0; i--,wal--)
{
if (editstatus == 0)
{
if ((show2dwall[i>>3]&pow2char[i&7]) == 0) continue;
j = wal->nextwall;
if ((j >= 0) && (i > j))
if ((show2dwall[j>>3]&pow2char[j&7]) > 0) continue;
}
else
{
j = wal->nextwall;
if ((j >= 0) && (i > j)) continue;
}
if (j < 0)
{
col = 7;
if (i == linehighlight) col += ((numframes&2)<<2);
}
else
{
col = 4;
if ((wal->cstat&1) != 0) col = 5;
if ((i == linehighlight) || ((linehighlight >= 0) && (i == wall[linehighlight].nextwall)))
col += ((numframes&2)<<2);
}
xp1 = mulscale14(wal->x-posxe,zoome);
yp1 = mulscale14(wal->y-posye,zoome);
xp2 = mulscale14(wall[wal->point2].x-posxe,zoome);
yp2 = mulscale14(wall[wal->point2].y-posye,zoome);
if ((wal->cstat&64) > 0)
{
if (klabs(xp2-xp1) >= klabs(yp2-yp1))
{
drawline16(320+xp1,200+yp1+1,320+xp2,200+yp2+1,col);
drawline16(320+xp1,200+yp1-1,320+xp2,200+yp2-1,col);
}
else
{
drawline16(320+xp1+1,200+yp1,320+xp2+1,200+yp2,col);
drawline16(320+xp1-1,200+yp1,320+xp2-1,200+yp2,col);
}
col += 8;
}
drawline16(320+xp1,200+yp1,320+xp2,200+yp2,col);
if ((zoome >= 256) && (editstatus == 1))
if (((320+xp1) >= 2) && ((320+xp1) <= 637))
if (((200+yp1) >= 2) && ((200+yp1) <= ydim16-3))
{
col = 2;
if (i == pointhighlight) col += ((numframes&2)<<2);
else if ((highlightcnt > 0) && (editstatus == 1))
{
if (show2dwall[i>>3]&pow2char[i&7])
col += ((numframes&2)<<2);
}
tempint = (mul5(200+yp1)<<7)+(320+xp1);
setcolor16((long)col);
drawpixel16(tempint-2-1280);
drawpixel16(tempint-1-1280);
drawpixel16(tempint+0-1280);
drawpixel16(tempint+1-1280);
drawpixel16(tempint+2-1280);
drawpixel16(tempint-2+1280);
drawpixel16(tempint-1+1280);
drawpixel16(tempint+0+1280);
drawpixel16(tempint+1+1280);
drawpixel16(tempint+2+1280);
drawpixel16(tempint-2-640);
drawpixel16(tempint-2+0);
drawpixel16(tempint-2+640);
drawpixel16(tempint+2-640);
drawpixel16(tempint+2+0);
drawpixel16(tempint+2+640);
}
}
faketimerhandler();
if ((zoome >= 256) || (editstatus == 0))
for(i=0; i<numsectors; i++)
for(j=headspritesect[i]; j>=0; j=nextspritesect[j])
if ((editstatus == 1) || (show2dsprite[j>>3]&pow2char[j&7]))
{
col = 3;
if ((sprite[j].cstat&1) > 0) col = 5;
if (editstatus == 1)
{
if (j+16384 == pointhighlight)
col += ((numframes&2)<<2);
else if ((highlightcnt > 0) && (editstatus == 1))
{
if (show2dsprite[j>>3]&pow2char[j&7])
col += ((numframes&2)<<2);
}
}
xp1 = mulscale14(sprite[j].x-posxe,zoome);
yp1 = mulscale14(sprite[j].y-posye,zoome);
if (((320+xp1) >= 2) && ((320+xp1) <= 637))
if (((200+yp1) >= 2) && ((200+yp1) <= ydim16-3))
{
tempint = (mul5(200+yp1)<<7)+(320+xp1);
setcolor16((long)col);
drawpixel16(tempint-1-1280);
drawpixel16(tempint+0-1280);
drawpixel16(tempint+1-1280);
drawpixel16(tempint-1+1280);
drawpixel16(tempint+0+1280);
drawpixel16(tempint+1+1280);
drawpixel16(tempint-2-640);
drawpixel16(tempint-2+0);
drawpixel16(tempint-2+640);
drawpixel16(tempint+2-640);
drawpixel16(tempint+2+0);
drawpixel16(tempint+2+640);
drawpixel16(tempint+1+640);
drawpixel16(tempint-1+640);
drawpixel16(tempint+1-640);
drawpixel16(tempint-1-640);
xp2 = mulscale11(sintable[(sprite[j].ang+2560)&2047],zoome) / 768;
yp2 = mulscale11(sintable[(sprite[j].ang+2048)&2047],zoome) / 768;
if ((sprite[j].cstat&256) > 0)
{
if (((sprite[j].ang+256)&512) == 0)
{
drawline16(320+xp1,200+yp1-1,320+xp1+xp2,200+yp1+yp2-1,col);
drawline16(320+xp1,200+yp1+1,320+xp1+xp2,200+yp1+yp2+1,col);
}
else
{
drawline16(320+xp1-1,200+yp1,320+xp1+xp2-1,200+yp1+yp2,col);
drawline16(320+xp1+1,200+yp1,320+xp1+xp2+1,200+yp1+yp2,col);
}
col += 8;
}
drawline16(320+xp1,200+yp1,320+xp1+xp2,200+yp1+yp2,col);
}
}
faketimerhandler();
xp1 = mulscale11(sintable[(ange+2560)&2047],zoome) / 768; /* Draw white arrow */
yp1 = mulscale11(sintable[(ange+2048)&2047],zoome) / 768;
drawline16(320+xp1,200+yp1,320-xp1,200-yp1,15);
drawline16(320+xp1,200+yp1,320+yp1,200-xp1,15);
drawline16(320+xp1,200+yp1,320-yp1,200+xp1,15);
}
/*
* This is ryan's change. SDL requires me to call SDL_UpdateRect() to force
* vid updates without a SDL_Flip() call, but there's no such thing in the
* DOS version of this program, so text won't show up sometimes without
* my update call in Linux. However, to get a nice shadow effect on some
* text, Ken draws a string at an offset and darker, and then on top of it
* draws the actual string. Two SDL_UpdateRect() calls in over top of each
* other cause flicker, so I have this function here so the shadow can
* be drawn with _noupdate, and the actual string is draw with an update.
*/
static void __printext256(int32_t xpos, int32_t ypos, short col, short backcol, uint8_t name[82], uint8_t fontsize, int should_update)
{
int32_t stx, i, x, y, charxsiz;
uint8_t *fontptr, *letptr, *ptr;
stx = xpos;
if (fontsize) {
fontptr = smalltextfont;
charxsiz = 4;
}
else {
fontptr = textfont;
charxsiz = 8;
}
for(i=0; name[i]; i++)
{
letptr = &fontptr[name[i]<<3];
ptr = (uint8_t *)(ylookup[ypos+7]+(stx-fontsize)+frameplace);
for(y=7; y>=0; y--)
{
for(x=charxsiz-1; x>=0; x--)
{
if (letptr[y]&pow2char[7-fontsize-x])
ptr[x] = (uint8_t )col;
else if (backcol >= 0)
ptr[x] = (uint8_t )backcol;
}
ptr -= ylookup[1];
}
stx += charxsiz;
}
if (should_update)
_updateScreenRect(xpos, ypos, charxsiz * i, 8);
}
void printext256(int32_t xpos, int32_t ypos, short col, short backcol, char name[82], uint8_t fontsize)
{
__printext256(xpos, ypos, col, backcol, name, fontsize, 1);
}
void printext256_noupdate(int32_t xpos, int32_t ypos, short col, short backcol, char name[82], uint8_t fontsize)
{
__printext256(xpos, ypos, col, backcol, name, fontsize, 0);
}
#ifdef DBGRECORD
int krand(int line, uint8_t * file)
{
int i, k=0;
uint8_t filename[2048];
FILE *pFile;
#else
int krand()
{
#endif
randomseed = (randomseed*27584621)+1;
#ifdef DBGRECORD
for(i=0; file[i]; i++)
{
if(file[i]=='\\')
{
i++;
k = 0;
}
filename[k++]=(file[i]=='.')?0:file[i];
}
// printf("%-5d %-8s %-8x\n", line, filename, randomseed);
pFile = fopen("c:\\temp\\krand.txt","a");
fprintf(pFile,"%-4d %-5s %-6x\n", line, filename, randomseed);
fclose(pFile);
#endif
return(((uint32_t )randomseed)>>16);
}
void getzrange(int32_t x, int32_t y, int32_t z, short sectnum,
int32_t *ceilz, int32_t *ceilhit, int32_t *florz, int32_t *florhit,
int32_t walldist, uint32_t cliptype)
{
sectortype *sec;
walltype *wal, *wal2;
spritetype *spr;
int32_t clipsectcnt, startwall, endwall, tilenum, xoff, yoff, dax, day;
int32_t xmin, ymin, xmax, ymax, i, j, k, l, daz, daz2, dx, dy;
int32_t x1, y1, x2, y2, x3, y3, x4, y4, ang, cosang, sinang;
int32_t xspan, yspan, xrepeat, yrepeat, dasprclipmask, dawalclipmask;
short cstat;
uint8_t clipyou;
if (sectnum < 0)
{
*ceilz = 0x80000000;
*ceilhit = -1;
*florz = 0x7fffffff;
*florhit = -1;
return;
}
/* Extra walldist for sprites on sector lines */
i = walldist+MAXCLIPDIST+1;
xmin = x-i;
ymin = y-i;
xmax = x+i;
ymax = y+i;
getzsofslope(sectnum,x,y,ceilz,florz);
*ceilhit = sectnum+16384;
*florhit = sectnum+16384;
dawalclipmask = (cliptype&65535);
dasprclipmask = (cliptype>>16);
clipsectorlist[0] = sectnum;
clipsectcnt = 0;
clipsectnum = 1;
do /* Collect sectors inside your square first */
{
sec = §or[clipsectorlist[clipsectcnt]];
startwall = sec->wallptr;
endwall = startwall + sec->wallnum;
for(j=startwall,wal=&wall[startwall]; j<endwall; j++,wal++)
{
k = wal->nextsector;
if (k >= 0)
{
wal2 = &wall[wal->point2];
x1 = wal->x;
x2 = wal2->x;
if ((x1 < xmin) && (x2 < xmin)) continue;
if ((x1 > xmax) && (x2 > xmax)) continue;
y1 = wal->y;
y2 = wal2->y;
if ((y1 < ymin) && (y2 < ymin)) continue;
if ((y1 > ymax) && (y2 > ymax)) continue;
dx = x2-x1;
dy = y2-y1;
if (dx*(y-y1) < (x-x1)*dy) continue; /* back */
if (dx > 0) dax = dx*(ymin-y1);
else dax = dx*(ymax-y1);
if (dy > 0) day = dy*(xmax-x1);
else day = dy*(xmin-x1);
if (dax >= day) continue;
if (wal->cstat&dawalclipmask) continue;
sec = §or[k];
if (editstatus == 0)
{
if (((sec->ceilingstat&1) == 0) && (z <= sec->ceilingz+(3<<8))) continue;
if (((sec->floorstat&1) == 0) && (z >= sec->floorz-(3<<8))) continue;
}
for(i=clipsectnum-1; i>=0; i--) if (clipsectorlist[i] == k) break;
if (i < 0) clipsectorlist[clipsectnum++] = k;
if ((x1 < xmin+MAXCLIPDIST) && (x2 < xmin+MAXCLIPDIST)) continue;
if ((x1 > xmax-MAXCLIPDIST) && (x2 > xmax-MAXCLIPDIST)) continue;
if ((y1 < ymin+MAXCLIPDIST) && (y2 < ymin+MAXCLIPDIST)) continue;
if ((y1 > ymax-MAXCLIPDIST) && (y2 > ymax-MAXCLIPDIST)) continue;
if (dx > 0) dax += dx*MAXCLIPDIST;
else dax -= dx*MAXCLIPDIST;
if (dy > 0) day -= dy*MAXCLIPDIST;
else day += dy*MAXCLIPDIST;
if (dax >= day) continue;
/* It actually got here, through all the continue's! */
getzsofslope((short)k,x,y,&daz,&daz2);
if (daz > *ceilz) {
*ceilz = daz;
*ceilhit = k+16384;
}
if (daz2 < *florz) {
*florz = daz2;
*florhit = k+16384;
}
}
}
clipsectcnt++;
} while (clipsectcnt < clipsectnum);
for(i=0; i<clipsectnum; i++)
{
for(j=headspritesect[clipsectorlist[i]]; j>=0; j=nextspritesect[j])
{
spr = &sprite[j];
cstat = spr->cstat;
if (cstat&dasprclipmask)
{
x1 = spr->x;
y1 = spr->y;
clipyou = 0;
switch(cstat&48)
{
case 0:
k = walldist+(spr->clipdist<<2)+1;
if ((klabs(x1-x) <= k) && (klabs(y1-y) <= k))
{
daz = spr->z;
k = ((tilesizy[spr->picnum]*spr->yrepeat)<<1);
if (cstat&128) daz += k;
if (picanm[spr->picnum]&0x00ff0000) daz -= ((long)((int8_t )((picanm[spr->picnum]>>16)&255))*spr->yrepeat<<2);
daz2 = daz - (k<<1);
clipyou = 1;
}
break;
case 16:
tilenum = spr->picnum;
xoff = (long)((int8_t )((picanm[tilenum]>>8)&255))+((long)spr->xoffset);
if ((cstat&4) > 0) xoff = -xoff;
k = spr->ang;
l = spr->xrepeat;
dax = sintable[k&2047]*l;
day = sintable[(k+1536)&2047]*l;
l = tilesizx[tilenum];
k = (l>>1)+xoff;
x1 -= mulscale16(dax,k);
x2 = x1+mulscale16(dax,l);
y1 -= mulscale16(day,k);
y2 = y1+mulscale16(day,l);
if (clipinsideboxline(x,y,x1,y1,x2,y2,walldist+1) != 0)
{
daz = spr->z;
k = ((tilesizy[spr->picnum]*spr->yrepeat)<<1);
if (cstat&128) daz += k;
if (picanm[spr->picnum]&0x00ff0000) daz -= ((long)((int8_t )((picanm[spr->picnum]>>16)&255))*spr->yrepeat<<2);
daz2 = daz-(k<<1);
clipyou = 1;
}
break;
case 32:
daz = spr->z;
daz2 = daz;
if ((cstat&64) != 0)
if ((z > daz) == ((cstat&8)==0)) continue;
tilenum = spr->picnum;
xoff = (long)((int8_t )((picanm[tilenum]>>8)&255))+((long)spr->xoffset);
yoff = (long)((int8_t )((picanm[tilenum]>>16)&255))+((long)spr->yoffset);
if ((cstat&4) > 0) xoff = -xoff;
if ((cstat&8) > 0) yoff = -yoff;
ang = spr->ang;
cosang = sintable[(ang+512)&2047];
sinang = sintable[ang];
xspan = tilesizx[tilenum];
xrepeat = spr->xrepeat;
yspan = tilesizy[tilenum];
yrepeat = spr->yrepeat;
dax = ((xspan>>1)+xoff)*xrepeat;
day = ((yspan>>1)+yoff)*yrepeat;
x1 += dmulscale16(sinang,dax,cosang,day)-x;
y1 += dmulscale16(sinang,day,-cosang,dax)-y;
l = xspan*xrepeat;
x2 = x1 - mulscale16(sinang,l);
y2 = y1 + mulscale16(cosang,l);
l = yspan*yrepeat;
k = -mulscale16(cosang,l);
x3 = x2+k;
x4 = x1+k;
k = -mulscale16(sinang,l);
y3 = y2+k;
y4 = y1+k;
dax = mulscale14(sintable[(spr->ang-256+512)&2047],walldist+4);
day = mulscale14(sintable[(spr->ang-256)&2047],walldist+4);
x1 += dax;
x2 -= day;
x3 -= dax;
x4 += day;
y1 += day;
y2 += dax;
y3 -= day;
y4 -= dax;
if ((y1^y2) < 0)
{
if ((x1^x2) < 0) clipyou ^= (x1*y2<x2*y1)^(y1<y2);
else if (x1 >= 0) clipyou ^= 1;
}
if ((y2^y3) < 0)
{
if ((x2^x3) < 0) clipyou ^= (x2*y3<x3*y2)^(y2<y3);
else if (x2 >= 0) clipyou ^= 1;
}
if ((y3^y4) < 0)
{
if ((x3^x4) < 0) clipyou ^= (x3*y4<x4*y3)^(y3<y4);
else if (x3 >= 0) clipyou ^= 1;
}
if ((y4^y1) < 0)
{
if ((x4^x1) < 0) clipyou ^= (x4*y1<x1*y4)^(y4<y1);
else if (x4 >= 0) clipyou ^= 1;
}
break;
}
if (clipyou != 0)
{
if ((z > daz) && (daz > *ceilz)) {
*ceilz = daz;
*ceilhit = j+49152;
}
if ((z < daz2) && (daz2 < *florz)) {
*florz = daz2;
*florhit = j+49152;
}
}
}
}
}
}
void setview(int32_t x1, int32_t y1, int32_t x2, int32_t y2)
{
int32_t i;
windowx1 = x1;
wx1 = (x1<<12);
windowy1 = y1;
wy1 = (y1<<12);
windowx2 = x2;
wx2 = ((x2+1)<<12);
windowy2 = y2;
wy2 = ((y2+1)<<12);
xdimen = (x2-x1)+1;
halfxdimen = (xdimen>>1);
xdimenrecip = divscale32(1L,xdimen);
ydimen = (y2-y1)+1;
setaspect(65536L,(long)divscale16(ydim*320L,xdim*200L));
for(i=0; i<windowx1; i++) {
startumost[i] = 1, startdmost[i] = 0;
}
for(i=windowx1; i<=windowx2; i++)
{
startumost[i] = windowy1, startdmost[i] = windowy2+1;
}
for(i=windowx2+1; i<xdim; i++) {
startumost[i] = 1, startdmost[i] = 0;
}
viewoffset = windowy1*bytesperline + windowx1;
if ((stereomode) || (vidoption == 6))
{
ostereopixelwidth = stereopixelwidth;
xdimen = (windowx2-windowx1+1)+(stereopixelwidth<<1);
halfxdimen = (xdimen>>1);
xdimenrecip = divscale32(1L,xdimen);
setaspect((long)divscale16(xdimen,windowx2-windowx1+1),yxaspect);
}
}
void setaspect(int32_t daxrange, int32_t daaspect)
{
viewingrange = daxrange;
viewingrangerecip = divscale32(1L,daxrange);
yxaspect = daaspect;
xyaspect = divscale32(1,yxaspect);
xdimenscale = scale(xdimen,yxaspect,320);
xdimscale = scale(320,xyaspect,xdimen);
}
void flushperms(void)
{
permhead = permtail = 0;
}
// Render a sprite on screen. This is used by the Engine but also the Game module
// when drawing the HUD or the Weapon held by the player !!!
void rotatesprite(int32_t sx, int32_t sy, int32_t z, short a, short picnum,
int8_t dashade, uint8_t dapalnum, uint8_t dastat,
int32_t cx1, int32_t cy1, int32_t cx2, int32_t cy2)
{
int32_t i;
permfifotype *per, *per2;
if ((cx1 > cx2) || (cy1 > cy2)) return;
if (z <= 16) return;
if (picanm[picnum]&192) picnum += animateoffs(picnum,(short)0xc000);
if ((tilesizx[picnum] <= 0) || (tilesizy[picnum] <= 0)) return;
if (((dastat&128) == 0) || (numpages < 2) || (beforedrawrooms != 0))
dorotatesprite(sx,sy,z,a,picnum,dashade,dapalnum,dastat,cx1,cy1,cx2,cy2);
if ((dastat&64) && (cx1 <= 0) && (cy1 <= 0) && (cx2 >= xdim-1) && (cy2 >= ydim-1) &&
(sx == (160<<16)) && (sy == (100<<16)) && (z == 65536L) && (a == 0) && ((dastat&1) == 0))
permhead = permtail = 0;
if ((dastat&128) == 0) return;
if (numpages >= 2)
{
per = &permfifo[permhead];
per->sx = sx;
per->sy = sy;
per->z = z;
per->a = a;
per->picnum = picnum;
per->dashade = dashade;
per->dapalnum = dapalnum;
per->dastat = dastat;
per->pagesleft = numpages+((beforedrawrooms&1)<<7);
per->cx1 = cx1;
per->cy1 = cy1;
per->cx2 = cx2;
per->cy2 = cy2;
/* Would be better to optimize out true bounding boxes */
if (dastat&64) /* If non-masking write, checking for overlapping cases */
{
for(i=permtail; i!=permhead; i=((i+1)&(MAXPERMS-1)))
{
per2 = &permfifo[i];
if ((per2->pagesleft&127) == 0) continue;
if (per2->sx != per->sx) continue;
if (per2->sy != per->sy) continue;
if (per2->z != per->z) continue;
if (per2->a != per->a) continue;
if (tilesizx[per2->picnum] > tilesizx[per->picnum]) continue;
if (tilesizy[per2->picnum] > tilesizy[per->picnum]) continue;
if (per2->cx1 < per->cx1) continue;
if (per2->cy1 < per->cy1) continue;
if (per2->cx2 > per->cx2) continue;
if (per2->cy2 > per->cy2) continue;
per2->pagesleft = 0;
}
if ((per->z == 65536) && (per->a == 0))
for(i=permtail; i!=permhead; i=((i+1)&(MAXPERMS-1)))
{
per2 = &permfifo[i];
if ((per2->pagesleft&127) == 0) continue;
if (per2->z != 65536) continue;
if (per2->a != 0) continue;
if (per2->cx1 < per->cx1) continue;
if (per2->cy1 < per->cy1) continue;
if (per2->cx2 > per->cx2) continue;
if (per2->cy2 > per->cy2) continue;
if ((per2->sx>>16) < (per->sx>>16)) continue;
if ((per2->sy>>16) < (per->sy>>16)) continue;
if ((per2->sx>>16)+tilesizx[per2->picnum] > (per->sx>>16)+tilesizx[per->picnum]) continue;
if ((per2->sy>>16)+tilesizy[per2->picnum] > (per->sy>>16)+tilesizy[per->picnum]) continue;
per2->pagesleft = 0;
}
}
permhead = ((permhead+1)&(MAXPERMS-1));
}
}
static int getclosestcol(int32_t r, int32_t g, int32_t b)
{
int32_t i, j, k, dist, mindist, retcol;
uint8_t *pal1;
j = (r>>3)*FASTPALGRIDSIZ*FASTPALGRIDSIZ+(g>>3)*FASTPALGRIDSIZ+(b>>3)+FASTPALGRIDSIZ*FASTPALGRIDSIZ+FASTPALGRIDSIZ+1;
mindist = min(rdist[coldist[r&7]+64+8],gdist[coldist[g&7]+64+8]);
mindist = min(mindist,bdist[coldist[b&7]+64+8]);
mindist++;
r = 64-r;
g = 64-g;
b = 64-b;
retcol = -1;
for(k=26; k>=0; k--)
{
i = colscan[k]+j;
if ((colhere[i>>3]&pow2char[i&7]) == 0) continue;
i = colhead[i];
do
{
pal1 = (uint8_t *)&palette[i*3];
dist = gdist[pal1[1]+g];
if (dist < mindist)
{
dist += rdist[pal1[0]+r];
if (dist < mindist)
{
dist += bdist[pal1[2]+b];
if (dist < mindist) {
mindist = dist;
retcol = i;
}
}
}
i = colnext[i];
} while (i >= 0);
}
if (retcol >= 0) return(retcol);
mindist = 0x7fffffff;
pal1 = (uint8_t *)&palette[768-3];
for(i=255; i>=0; i--,pal1-=3)
{
dist = gdist[pal1[1]+g];
if (dist >= mindist) continue;
dist += rdist[pal1[0]+r];
if (dist >= mindist) continue;
dist += bdist[pal1[2]+b];
if (dist >= mindist) continue;
mindist = dist;
retcol = i;
}
return(retcol);
}
void makepalookup(int32_t palnum, uint8_t *remapbuf, int8_t r,
int8_t g, int8_t b, uint8_t dastat)
{
int32_t i, j, dist, palscale;
uint8_t *ptr, *ptr2;
if (paletteloaded == 0) return;
if (palookup[palnum] == NULL)
{
/* Allocate palookup buffer */
if ((palookup[palnum] = (uint8_t *)kkmalloc(numpalookups<<8)) == NULL)
allocache((int32_t *)&palookup[palnum],numpalookups<<8,&permanentlock);
}
if (dastat == 0) return;
if ((r|g|b|63) != 63) return;
if ((r|g|b) == 0)
{
for(i=0; i<256; i++)
{
ptr = (uint8_t *)(FP_OFF(palookup[0])+remapbuf[i]);
ptr2 = (uint8_t *)(FP_OFF(palookup[palnum])+i);
for(j=0; j<numpalookups; j++)
{
*ptr2 = *ptr;
ptr += 256;
ptr2 += 256;
}
}
}
else
{
ptr2 = (uint8_t *)FP_OFF(palookup[palnum]);
for(i=0; i<numpalookups; i++)
{
palscale = divscale16(i,numpalookups);
for(j=0; j<256; j++)
{
ptr = (uint8_t *)&palette[remapbuf[j]*3];
*ptr2++ = getclosestcol((long)ptr[0]+mulscale16(r-ptr[0],palscale),
(long)ptr[1]+mulscale16(g-ptr[1],palscale),
(long)ptr[2]+mulscale16(b-ptr[2],palscale));
}
}
}
if ((vidoption == 6) && (qsetmode == 200))
{
for(i=0; i<256; i++)
{
dist = palette[i*3]*3+palette[i*3+1]*5+palette[i*3+2]*2;
ptr = (uint8_t *)(FP_OFF(palookup[palnum])+i);
for(j=0; j<32; j++)
ptr[j<<8] = (uint8_t )min(max(mulscale10(dist,32-j),0),15);
}
}
}
void setbrightness(uint8_t dabrightness, uint8_t *dapal)
{
int32_t i, j, k;
curbrightness = min(max((long)dabrightness,0),15);
k = 0;
if (vidoption == 6)
{
for(j=0; j<16; j++)
for(i=0; i<16; i++)
{
tempbuf[k++] = britable[curbrightness][j<<2];
tempbuf[k++] = 0;
tempbuf[k++] = britable[curbrightness][i<<2];
tempbuf[k++] = 0;
}
}
else
{
for(i=0; i<256; i++)
{
tempbuf[k++] = britable[curbrightness][dapal[i*3+2]];
tempbuf[k++] = britable[curbrightness][dapal[i*3+1]];
tempbuf[k++] = britable[curbrightness][dapal[i*3+0]];
tempbuf[k++] = 0;
}
}
VBE_setPalette(0, 256, (uint8_t *) tempbuf);
}
//This is only used by drawmapview.
static void fillpolygon(int32_t npoints)
{
int32_t z, zz, x1, y1, x2, y2, miny, maxy, y, xinc, cnt;
int32_t ox, oy, bx, by, p, day1, day2;
short *ptr, *ptr2;
miny = 0x7fffffff;
maxy = 0x80000000;
for(z=npoints-1; z>=0; z--)
{
y = ry1[z];
miny = min(miny,y);
maxy = max(maxy,y);
}
miny = (miny>>12);
maxy = (maxy>>12);
if (miny < 0) miny = 0;
if (maxy >= ydim) maxy = ydim-1;
ptr = smost; /* They're pointers! - watch how you optimize this thing */
for(y=miny; y<=maxy; y++)
{
dotp1[y] = ptr;
dotp2[y] = ptr+(MAXNODESPERLINE>>1);
ptr += MAXNODESPERLINE;
}
for(z=npoints-1; z>=0; z--)
{
zz = xb1[z];
y1 = ry1[z];
day1 = (y1>>12);
y2 = ry1[zz];
day2 = (y2>>12);
if (day1 != day2)
{
x1 = rx1[z];
x2 = rx1[zz];
xinc = divscale12(x2-x1,y2-y1);
if (day2 > day1)
{
x1 += mulscale12((day1<<12)+4095-y1,xinc);
for(y=day1; y<day2; y++) {
*dotp2[y]++ = (x1>>12);
x1 += xinc;
}
}
else
{
x2 += mulscale12((day2<<12)+4095-y2,xinc);
for(y=day2; y<day1; y++) {
*dotp1[y]++ = (x2>>12);
x2 += xinc;
}
}
}
}
globalx1 = mulscale16(globalx1,xyaspect);
globaly2 = mulscale16(globaly2,xyaspect);
oy = miny+1-(ydim>>1);
globalposx += oy*globalx1;
globalposy += oy*globaly2;
ptr = smost;
for(y=miny; y<=maxy; y++)
{
cnt = dotp1[y]-ptr;
ptr2 = ptr+(MAXNODESPERLINE>>1);
for(z=cnt-1; z>=0; z--)
{
day1 = 0;
day2 = 0;
for(zz=z; zz>0; zz--)
{
if (ptr[zz] < ptr[day1]) day1 = zz;
if (ptr2[zz] < ptr2[day2]) day2 = zz;
}
x1 = ptr[day1];
ptr[day1] = ptr[z];
x2 = ptr2[day2]-1;
ptr2[day2] = ptr2[z];
if (x1 > x2) continue;
if (globalpolytype < 1)
{
/* maphline */
ox = x2+1-(xdim>>1);
bx = ox*asm1 + globalposx;
by = ox*asm2 - globalposy;
p = ylookup[y]+x2+frameplace;
hlineasm4(x2-x1,-1L,globalshade<<8,by,bx,p);
}
else
{
/* maphline */
ox = x1+1-(xdim>>1);
bx = ox*asm1 + globalposx;
by = ox*asm2 - globalposy;
p = ylookup[y]+x1+frameplace;
if (globalpolytype == 1)
mhline(globalbufplc,bx,(x2-x1)<<16,0L,by,p);
else
{
thline(globalbufplc,bx,(x2-x1)<<16,0L,by,p);
transarea += (x2-x1);
}
}
}
globalposx += globalx1;
globalposy += globaly2;
ptr += MAXNODESPERLINE;
}
faketimerhandler();
}
static int clippoly (int32_t npoints, int32_t clipstat)
{
int32_t z, zz, s1, s2, t, npoints2, start2, z1, z2, z3, z4, splitcnt;
int32_t cx1, cy1, cx2, cy2;
cx1 = windowx1;
cy1 = windowy1;
cx2 = windowx2+1;
cy2 = windowy2+1;
cx1 <<= 12;
cy1 <<= 12;
cx2 <<= 12;
cy2 <<= 12;
if (clipstat&0xa) /* Need to clip top or left */
{
npoints2 = 0;
start2 = 0;
z = 0;
splitcnt = 0;
do
{
s2 = cx1-rx1[z];
do
{
zz = xb1[z];
xb1[z] = -1;
s1 = s2;
s2 = cx1-rx1[zz];
if (s1 < 0)
{
rx2[npoints2] = rx1[z];
ry2[npoints2] = ry1[z];
xb2[npoints2] = npoints2+1;
npoints2++;
}
if ((s1^s2) < 0)
{
rx2[npoints2] = rx1[z]+scale(rx1[zz]-rx1[z],s1,s1-s2);
ry2[npoints2] = ry1[z]+scale(ry1[zz]-ry1[z],s1,s1-s2);
if (s1 < 0) p2[splitcnt++] = npoints2;
xb2[npoints2] = npoints2+1;
npoints2++;
}
z = zz;
} while (xb1[z] >= 0);
if (npoints2 >= start2+3)
xb2[npoints2-1] = start2, start2 = npoints2;
else
npoints2 = start2;
z = 1;
while ((z < npoints) && (xb1[z] < 0)) z++;
} while (z < npoints);
if (npoints2 <= 2) return(0);
for(z=1; z<splitcnt; z++)
for(zz=0; zz<z; zz++)
{
z1 = p2[z];
z2 = xb2[z1];
z3 = p2[zz];
z4 = xb2[z3];
s1 = klabs(rx2[z1]-rx2[z2])+klabs(ry2[z1]-ry2[z2]);
s1 += klabs(rx2[z3]-rx2[z4])+klabs(ry2[z3]-ry2[z4]);
s2 = klabs(rx2[z1]-rx2[z4])+klabs(ry2[z1]-ry2[z4]);
s2 += klabs(rx2[z3]-rx2[z2])+klabs(ry2[z3]-ry2[z2]);
if (s2 < s1)
{
t = xb2[p2[z]];
xb2[p2[z]] = xb2[p2[zz]];
xb2[p2[zz]] = t;
}
}
npoints = 0;
start2 = 0;
z = 0;
splitcnt = 0;
do
{
s2 = cy1-ry2[z];
do
{
zz = xb2[z];
xb2[z] = -1;
s1 = s2;
s2 = cy1-ry2[zz];
if (s1 < 0)
{
rx1[npoints] = rx2[z];
ry1[npoints] = ry2[z];
xb1[npoints] = npoints+1;
npoints++;
}
if ((s1^s2) < 0)
{
rx1[npoints] = rx2[z]+scale(rx2[zz]-rx2[z],s1,s1-s2);
ry1[npoints] = ry2[z]+scale(ry2[zz]-ry2[z],s1,s1-s2);
if (s1 < 0) p2[splitcnt++] = npoints;
xb1[npoints] = npoints+1;
npoints++;
}
z = zz;
} while (xb2[z] >= 0);
if (npoints >= start2+3)
xb1[npoints-1] = start2, start2 = npoints;
else
npoints = start2;
z = 1;
while ((z < npoints2) && (xb2[z] < 0)) z++;
} while (z < npoints2);
if (npoints <= 2) return(0);
for(z=1; z<splitcnt; z++)
for(zz=0; zz<z; zz++)
{
z1 = p2[z];
z2 = xb1[z1];
z3 = p2[zz];
z4 = xb1[z3];
s1 = klabs(rx1[z1]-rx1[z2])+klabs(ry1[z1]-ry1[z2]);
s1 += klabs(rx1[z3]-rx1[z4])+klabs(ry1[z3]-ry1[z4]);
s2 = klabs(rx1[z1]-rx1[z4])+klabs(ry1[z1]-ry1[z4]);
s2 += klabs(rx1[z3]-rx1[z2])+klabs(ry1[z3]-ry1[z2]);
if (s2 < s1)
{
t = xb1[p2[z]];
xb1[p2[z]] = xb1[p2[zz]];
xb1[p2[zz]] = t;
}
}
}
if (clipstat&0x5) /* Need to clip bottom or right */
{
npoints2 = 0;
start2 = 0;
z = 0;
splitcnt = 0;
do
{
s2 = rx1[z]-cx2;
do
{
zz = xb1[z];
xb1[z] = -1;
s1 = s2;
s2 = rx1[zz]-cx2;
if (s1 < 0)
{
rx2[npoints2] = rx1[z];
ry2[npoints2] = ry1[z];
xb2[npoints2] = npoints2+1;
npoints2++;
}
if ((s1^s2) < 0)
{
rx2[npoints2] = rx1[z]+scale(rx1[zz]-rx1[z],s1,s1-s2);
ry2[npoints2] = ry1[z]+scale(ry1[zz]-ry1[z],s1,s1-s2);
if (s1 < 0) p2[splitcnt++] = npoints2;
xb2[npoints2] = npoints2+1;
npoints2++;
}
z = zz;
} while (xb1[z] >= 0);
if (npoints2 >= start2+3)
xb2[npoints2-1] = start2, start2 = npoints2;
else
npoints2 = start2;
z = 1;
while ((z < npoints) && (xb1[z] < 0)) z++;
} while (z < npoints);
if (npoints2 <= 2) return(0);
for(z=1; z<splitcnt; z++)
for(zz=0; zz<z; zz++)
{
z1 = p2[z];
z2 = xb2[z1];
z3 = p2[zz];
z4 = xb2[z3];
s1 = klabs(rx2[z1]-rx2[z2])+klabs(ry2[z1]-ry2[z2]);
s1 += klabs(rx2[z3]-rx2[z4])+klabs(ry2[z3]-ry2[z4]);
s2 = klabs(rx2[z1]-rx2[z4])+klabs(ry2[z1]-ry2[z4]);
s2 += klabs(rx2[z3]-rx2[z2])+klabs(ry2[z3]-ry2[z2]);
if (s2 < s1)
{
t = xb2[p2[z]];
xb2[p2[z]] = xb2[p2[zz]];
xb2[p2[zz]] = t;
}
}
npoints = 0;
start2 = 0;
z = 0;
splitcnt = 0;
do
{
s2 = ry2[z]-cy2;
do
{
zz = xb2[z];
xb2[z] = -1;
s1 = s2;
s2 = ry2[zz]-cy2;
if (s1 < 0)
{
rx1[npoints] = rx2[z];
ry1[npoints] = ry2[z];
xb1[npoints] = npoints+1;
npoints++;
}
if ((s1^s2) < 0)
{
rx1[npoints] = rx2[z]+scale(rx2[zz]-rx2[z],s1,s1-s2);
ry1[npoints] = ry2[z]+scale(ry2[zz]-ry2[z],s1,s1-s2);
if (s1 < 0) p2[splitcnt++] = npoints;
xb1[npoints] = npoints+1;
npoints++;
}
z = zz;
} while (xb2[z] >= 0);
if (npoints >= start2+3)
xb1[npoints-1] = start2, start2 = npoints;
else
npoints = start2;
z = 1;
while ((z < npoints2) && (xb2[z] < 0)) z++;
} while (z < npoints2);
if (npoints <= 2) return(0);
for(z=1; z<splitcnt; z++)
for(zz=0; zz<z; zz++)
{
z1 = p2[z];
z2 = xb1[z1];
z3 = p2[zz];
z4 = xb1[z3];
s1 = klabs(rx1[z1]-rx1[z2])+klabs(ry1[z1]-ry1[z2]);
s1 += klabs(rx1[z3]-rx1[z4])+klabs(ry1[z3]-ry1[z4]);
s2 = klabs(rx1[z1]-rx1[z4])+klabs(ry1[z1]-ry1[z4]);
s2 += klabs(rx1[z3]-rx1[z2])+klabs(ry1[z3]-ry1[z2]);
if (s2 < s1)
{
t = xb1[p2[z]];
xb1[p2[z]] = xb1[p2[zz]];
xb1[p2[zz]] = t;
}
}
}
return(npoints);
}
void drawmapview(int32_t dax, int32_t day, int32_t zoome, short ang)
{
walltype *wal;
sectortype *sec;
spritetype *spr;
int32_t tilenum, xoff, yoff, i, j, k, l, cosang, sinang, xspan, yspan;
int32_t xrepeat, yrepeat, x, y, x1, y1, x2, y2, x3, y3, x4, y4, bakx1, baky1;
int32_t s, w, ox, oy, startwall, cx1, cy1, cx2, cy2;
int32_t bakgxvect, bakgyvect, sortnum, gap, npoints;
int32_t xvect, yvect, xvect2, yvect2, daslope;
beforedrawrooms = 0;
totalarea += (windowx2+1-windowx1)*(windowy2+1-windowy1);
clearbuf(&gotsector[0],(long)((numsectors+31)>>5),0L);
cx1 = (windowx1<<12);
cy1 = (windowy1<<12);
cx2 = ((windowx2+1)<<12)-1;
cy2 = ((windowy2+1)<<12)-1;
zoome <<= 8;
bakgxvect = divscale28(sintable[(1536-ang)&2047],zoome);
bakgyvect = divscale28(sintable[(2048-ang)&2047],zoome);
xvect = mulscale8(sintable[(2048-ang)&2047],zoome);
yvect = mulscale8(sintable[(1536-ang)&2047],zoome);
xvect2 = mulscale16(xvect,yxaspect);
yvect2 = mulscale16(yvect,yxaspect);
sortnum = 0;
for(s=0,sec=§or[s]; s<numsectors; s++,sec++)
if (show2dsector[s>>3]&pow2char[s&7])
{
npoints = 0;
i = 0;
startwall = sec->wallptr;
for(w=sec->wallnum,wal=&wall[startwall]; w>0; w--,wal++)
{
ox = wal->x - dax;
oy = wal->y - day;
x = dmulscale16(ox,xvect,-oy,yvect) + (xdim<<11);
y = dmulscale16(oy,xvect2,ox,yvect2) + (ydim<<11);
i |= getclipmask(x-cx1,cx2-x,y-cy1,cy2-y);
rx1[npoints] = x;
ry1[npoints] = y;
xb1[npoints] = wal->point2 - startwall;
npoints++;
}
if ((i&0xf0) != 0xf0) continue;
bakx1 = rx1[0];
baky1 = mulscale16(ry1[0]-(ydim<<11),xyaspect)+(ydim<<11);
if (i&0x0f)
{
npoints = clippoly(npoints,i);
if (npoints < 3) continue;
}
/* Collect floor sprites to draw */
for(i=headspritesect[s]; i>=0; i=nextspritesect[i])
if ((sprite[i].cstat&48) == 32)
{
if ((sprite[i].cstat&(64+8)) == (64+8)) continue;
tsprite[sortnum++].owner = i;
}
gotsector[s>>3] |= pow2char[s&7];
globalorientation = (long)sec->floorstat;
if ((globalorientation&1) != 0) continue;
if (palookup[sec->floorpal] != globalpalwritten)
{
globalpalwritten = palookup[sec->floorpal];
setpalookupaddress(globalpalwritten);
}
globalpicnum = sec->floorpicnum;
if ((unsigned)globalpicnum >= (unsigned)MAXTILES) globalpicnum = 0;
setgotpic(globalpicnum);
if ((tilesizx[globalpicnum] <= 0) || (tilesizy[globalpicnum] <= 0)) continue;
if ((picanm[globalpicnum]&192) != 0) globalpicnum += animateoffs((short)globalpicnum,s);
if (waloff[globalpicnum] == 0) loadtile(globalpicnum);
globalbufplc = waloff[globalpicnum];
globalshade = max(min(sec->floorshade,numpalookups-1),0);
globvis = globalhisibility;
if (sec->visibility != 0) globvis = mulscale4(globvis,(long)((uint8_t )(sec->visibility+16)));
globalpolytype = 0;
if ((globalorientation&64) == 0)
{
globalposx = dax;
globalx1 = bakgxvect;
globaly1 = bakgyvect;
globalposy = day;
globalx2 = bakgxvect;
globaly2 = bakgyvect;
}
else
{
ox = wall[wall[startwall].point2].x - wall[startwall].x;
oy = wall[wall[startwall].point2].y - wall[startwall].y;
i = nsqrtasm(ox*ox+oy*oy);
if (i == 0) continue;
i = 1048576/i;
globalx1 = mulscale10(dmulscale10(ox,bakgxvect,oy,bakgyvect),i);
globaly1 = mulscale10(dmulscale10(ox,bakgyvect,-oy,bakgxvect),i);
ox = (bakx1>>4)-(xdim<<7);
oy = (baky1>>4)-(ydim<<7);
globalposx = dmulscale28(-oy,globalx1,-ox,globaly1);
globalposy = dmulscale28(-ox,globalx1,oy,globaly1);
globalx2 = -globalx1;
globaly2 = -globaly1;
daslope = sector[s].floorheinum;
i = nsqrtasm(daslope*daslope+16777216);
globalposy = mulscale12(globalposy,i);
globalx2 = mulscale12(globalx2,i);
globaly2 = mulscale12(globaly2,i);
}
globalxshift = (8-(picsiz[globalpicnum]&15));
globalyshift = (8-(picsiz[globalpicnum]>>4));
if (globalorientation&8) {
globalxshift++;
globalyshift++;
}
sethlinesizes(picsiz[globalpicnum]&15,picsiz[globalpicnum]>>4,globalbufplc);
if ((globalorientation&0x4) > 0)
{
i = globalposx;
globalposx = -globalposy;
globalposy = -i;
i = globalx2;
globalx2 = globaly1;
globaly1 = i;
i = globalx1;
globalx1 = -globaly2;
globaly2 = -i;
}
if ((globalorientation&0x10) > 0) globalx1 = -globalx1, globaly1 = -globaly1, globalposx = -globalposx;
if ((globalorientation&0x20) > 0) globalx2 = -globalx2, globaly2 = -globaly2, globalposy = -globalposy;
asm1 = (globaly1<<globalxshift);
asm2 = (globalx2<<globalyshift);
globalx1 <<= globalxshift;
globaly2 <<= globalyshift;
globalposx = (globalposx<<(20+globalxshift))+(((long)sec->floorxpanning)<<24);
globalposy = (globalposy<<(20+globalyshift))-(((long)sec->floorypanning)<<24);
fillpolygon(npoints);
}
/* Sort sprite list */
gap = 1;
while (gap < sortnum) gap = (gap<<1)+1;
for(gap>>=1; gap>0; gap>>=1)
for(i=0; i<sortnum-gap; i++)
for(j=i; j>=0; j-=gap)
{
if (sprite[tsprite[j].owner].z <= sprite[tsprite[j+gap].owner].z) break;
swapshort(&tsprite[j].owner,&tsprite[j+gap].owner);
}
for(s=sortnum-1; s>=0; s--)
{
spr = &sprite[tsprite[s].owner];
if ((spr->cstat&48) == 32)
{
npoints = 0;
tilenum = spr->picnum;
xoff = (long)((int8_t )((picanm[tilenum]>>8)&255))+((long)spr->xoffset);
yoff = (long)((int8_t )((picanm[tilenum]>>16)&255))+((long)spr->yoffset);
if ((spr->cstat&4) > 0) xoff = -xoff;
if ((spr->cstat&8) > 0) yoff = -yoff;
k = spr->ang;
cosang = sintable[(k+512)&2047];
sinang = sintable[k];
xspan = tilesizx[tilenum];
xrepeat = spr->xrepeat;
yspan = tilesizy[tilenum];
yrepeat = spr->yrepeat;
ox = ((xspan>>1)+xoff)*xrepeat;
oy = ((yspan>>1)+yoff)*yrepeat;
x1 = spr->x + mulscale(sinang,ox,16) + mulscale(cosang,oy,16);
y1 = spr->y + mulscale(sinang,oy,16) - mulscale(cosang,ox,16);
l = xspan*xrepeat;
x2 = x1 - mulscale(sinang,l,16);
y2 = y1 + mulscale(cosang,l,16);
l = yspan*yrepeat;
k = -mulscale(cosang,l,16);
x3 = x2+k;
x4 = x1+k;
k = -mulscale(sinang,l,16);
y3 = y2+k;
y4 = y1+k;
xb1[0] = 1;
xb1[1] = 2;
xb1[2] = 3;
xb1[3] = 0;
npoints = 4;
i = 0;
ox = x1 - dax;
oy = y1 - day;
x = dmulscale16(ox,xvect,-oy,yvect) + (xdim<<11);
y = dmulscale16(oy,xvect2,ox,yvect2) + (ydim<<11);
i |= getclipmask(x-cx1,cx2-x,y-cy1,cy2-y);
rx1[0] = x;
ry1[0] = y;
ox = x2 - dax;
oy = y2 - day;
x = dmulscale16(ox,xvect,-oy,yvect) + (xdim<<11);
y = dmulscale16(oy,xvect2,ox,yvect2) + (ydim<<11);
i |= getclipmask(x-cx1,cx2-x,y-cy1,cy2-y);
rx1[1] = x;
ry1[1] = y;
ox = x3 - dax;
oy = y3 - day;
x = dmulscale16(ox,xvect,-oy,yvect) + (xdim<<11);
y = dmulscale16(oy,xvect2,ox,yvect2) + (ydim<<11);
i |= getclipmask(x-cx1,cx2-x,y-cy1,cy2-y);
rx1[2] = x;
ry1[2] = y;
x = rx1[0]+rx1[2]-rx1[1];
y = ry1[0]+ry1[2]-ry1[1];
i |= getclipmask(x-cx1,cx2-x,y-cy1,cy2-y);
rx1[3] = x;
ry1[3] = y;
if ((i&0xf0) != 0xf0) continue;
bakx1 = rx1[0];
baky1 = mulscale16(ry1[0]-(ydim<<11),xyaspect)+(ydim<<11);
if (i&0x0f)
{
npoints = clippoly(npoints,i);
if (npoints < 3) continue;
}
globalpicnum = spr->picnum;
if ((unsigned)globalpicnum >= (unsigned)MAXTILES) globalpicnum = 0;
setgotpic(globalpicnum);
if ((tilesizx[globalpicnum] <= 0) || (tilesizy[globalpicnum] <= 0)) continue;
if ((picanm[globalpicnum]&192) != 0) globalpicnum += animateoffs((short)globalpicnum,s);
if (waloff[globalpicnum] == 0) loadtile(globalpicnum);
globalbufplc = waloff[globalpicnum];
if ((sector[spr->sectnum].ceilingstat&1) > 0)
globalshade = ((long)sector[spr->sectnum].ceilingshade);
else
globalshade = ((long)sector[spr->sectnum].floorshade);
globalshade = max(min(globalshade+spr->shade+6,numpalookups-1),0);
asm3 = (long) FP_OFF(palookup[spr->pal]+(globalshade<<8));
globvis = globalhisibility;
if (sec->visibility != 0) globvis = mulscale4(globvis,(long)((uint8_t )(sec->visibility+16)));
globalpolytype = ((spr->cstat&2)>>1)+1;
/* relative alignment stuff */
ox = x2-x1;
oy = y2-y1;
i = ox*ox+oy*oy;
if (i == 0) continue;
i = (65536*16384)/i;
globalx1 = mulscale10(dmulscale10(ox,bakgxvect,oy,bakgyvect),i);
globaly1 = mulscale10(dmulscale10(ox,bakgyvect,-oy,bakgxvect),i);
ox = y1-y4;
oy = x4-x1;
i = ox*ox+oy*oy;
if (i == 0) continue;
i = (65536*16384)/i;
globalx2 = mulscale10(dmulscale10(ox,bakgxvect,oy,bakgyvect),i);
globaly2 = mulscale10(dmulscale10(ox,bakgyvect,-oy,bakgxvect),i);
ox = picsiz[globalpicnum];
oy = ((ox>>4)&15);
ox &= 15;
if (pow2long[ox] != xspan)
{
ox++;
globalx1 = mulscale(globalx1,xspan,ox);
globaly1 = mulscale(globaly1,xspan,ox);
}
bakx1 = (bakx1>>4)-(xdim<<7);
baky1 = (baky1>>4)-(ydim<<7);
globalposx = dmulscale28(-baky1,globalx1,-bakx1,globaly1);
globalposy = dmulscale28(bakx1,globalx2,-baky1,globaly2);
if ((spr->cstat&2) == 0)
msethlineshift(ox,oy);
else
tsethlineshift(ox,oy);
if ((spr->cstat&0x4) > 0) globalx1 = -globalx1, globaly1 = -globaly1, globalposx = -globalposx;
asm1 = (globaly1<<2);
globalx1 <<= 2;
globalposx <<= (20+2);
asm2 = (globalx2<<2);
globaly2 <<= 2;
globalposy <<= (20+2);
fillpolygon(npoints);
}
}
}
void clearview(int32_t dacol)
{
int32_t p, y, dx;
if (qsetmode != 200) return;
dx = windowx2-windowx1+1;
dacol += (dacol<<8);
dacol += (dacol<<16);
if (vidoption == 6)
{
p = (long) FP_OFF(screen)+ylookup[windowy1]+windowx1;
for(y=windowy1; y<=windowy2; y++)
{
clearbufbyte((void *)p,dx,dacol);
clearbufbyte((void *)(p+65536),dx,dacol);
p += ylookup[1];
}
faketimerhandler();
return;
}
p = frameplace+ylookup[windowy1]+windowx1;
for(y=windowy1; y<=windowy2; y++)
{
clearbufbyte((void *)p,dx,dacol);
p += ylookup[1];
}
faketimerhandler();
}
void clearallviews(int32_t dacol)
{
int32_t i;
if (qsetmode != 200) return;
dacol += (dacol<<8);
dacol += (dacol<<16);
switch(vidoption)
{
case 1:
for(i=0; i<numpages; i++)
{
setactivepage(i);
clearbufbyte((void *)frameplace,imageSize,0L);
}
setactivepage(activepage);
case 2:
clearbuf((void *)frameplace,(xdim*ydim)>>2,0L);
break;
case 6:
clearbuf(screen,128000L>>2,dacol);
break;
}
faketimerhandler();
}
void plotpixel(int32_t x, int32_t y, uint8_t col)
{
drawpixel(ylookup[y]+x+frameplace,(long)col);
}
uint8_t getpixel(int32_t x, int32_t y)
{
return(readpixel(ylookup[y]+x+frameplace));
}
/* MUST USE RESTOREFORDRAWROOMS AFTER DRAWING */
static int32_t setviewcnt = 0;
static int32_t bakvidoption[4];
static int32_t bakframeplace[4], bakxsiz[4], bakysiz[4];
static int32_t bakwindowx1[4], bakwindowy1[4];
static int32_t bakwindowx2[4], bakwindowy2[4];
void setviewtotile(short tilenume, int32_t xsiz, int32_t ysiz)
{
int32_t i, j;
/* DRAWROOMS TO TILE BACKUP&SET CODE */
tilesizx[tilenume] = xsiz;
tilesizy[tilenume] = ysiz;
bakxsiz[setviewcnt] = xsiz;
bakysiz[setviewcnt] = ysiz;
bakvidoption[setviewcnt] = vidoption;
vidoption = 2;
bakframeplace[setviewcnt] = frameplace;
frameplace = waloff[tilenume];
bakwindowx1[setviewcnt] = windowx1;
bakwindowy1[setviewcnt] = windowy1;
bakwindowx2[setviewcnt] = windowx2;
bakwindowy2[setviewcnt] = windowy2;
copybufbyte(&startumost[windowx1],&bakumost[windowx1],(windowx2-windowx1+1)*sizeof(bakumost[0]));
copybufbyte(&startdmost[windowx1],&bakdmost[windowx1],(windowx2-windowx1+1)*sizeof(bakdmost[0]));
setview(0,0,ysiz-1,xsiz-1);
setaspect(65536,65536);
j = 0;
for(i=0; i<=xsiz; i++) {
ylookup[i] = j, j += ysiz;
}
setvlinebpl(ysiz);
setviewcnt++;
}
void setviewback(void)
{
int32_t i, j, k;
if (setviewcnt <= 0) return;
setviewcnt--;
setview(bakwindowx1[setviewcnt],bakwindowy1[setviewcnt],
bakwindowx2[setviewcnt],bakwindowy2[setviewcnt]);
copybufbyte(&bakumost[windowx1],&startumost[windowx1],(windowx2-windowx1+1)*sizeof(startumost[0]));
copybufbyte(&bakdmost[windowx1],&startdmost[windowx1],(windowx2-windowx1+1)*sizeof(startdmost[0]));
vidoption = bakvidoption[setviewcnt];
frameplace = bakframeplace[setviewcnt];
if (setviewcnt == 0)
k = bakxsiz[0];
else
k = max(bakxsiz[setviewcnt-1],bakxsiz[setviewcnt]);
j = 0;
for(i=0; i<=k; i++) ylookup[i] = j, j += bytesperline;
setvlinebpl(bytesperline);
}
void squarerotatetile(short tilenume)
{
int32_t i, j, k, xsiz, ysiz;
uint8_t *ptr1, *ptr2;
xsiz = tilesizx[tilenume];
ysiz = tilesizy[tilenume];
/* supports square tiles only for rotation part */
if (xsiz == ysiz)
{
k = (xsiz<<1);
for(i=xsiz-1; i>=0; i--)
{
ptr1 = (uint8_t *) (waloff[tilenume]+i*(xsiz+1));
ptr2 = ptr1;
if ((i&1) != 0) {
ptr1--;
ptr2 -= xsiz;
swapchar(ptr1,ptr2);
}
for(j=(i>>1)-1; j>=0; j--)
{
ptr1 -= 2;
ptr2 -= k;
swapchar2(ptr1,ptr2,xsiz);
}
}
}
}
void preparemirror(int32_t dax, int32_t day, int32_t daz,
short daang, int32_t dahoriz, short dawall,
short dasector, int32_t *tposx, int32_t *tposy,
short *tang)
{
int32_t i, j, x, y, dx, dy;
x = wall[dawall].x;
dx = wall[wall[dawall].point2].x-x;
y = wall[dawall].y;
dy = wall[wall[dawall].point2].y-y;
j = dx*dx + dy*dy;
if (j == 0) return;
i = (((dax-x)*dx + (day-y)*dy)<<1);
*tposx = (x<<1) + scale(dx,i,j) - dax;
*tposy = (y<<1) + scale(dy,i,j) - day;
*tang = (((getangle(dx,dy)<<1)-daang)&2047);
inpreparemirror = 1;
}
void completemirror(void)
{
int32_t i, dy, p;
/* Can't reverse with uninitialized data */
if (inpreparemirror) {
inpreparemirror = 0;
return;
}
if (mirrorsx1 > 0) mirrorsx1--;
if (mirrorsx2 < windowx2-windowx1-1) mirrorsx2++;
if (mirrorsx2 < mirrorsx1) return;
transarea += (mirrorsx2-mirrorsx1)*(windowy2-windowy1);
p = frameplace+ylookup[windowy1+mirrorsy1]+windowx1+mirrorsx1;
i = windowx2-windowx1-mirrorsx2-mirrorsx1;
mirrorsx2 -= mirrorsx1;
// FIX_00085: Optimized Video driver. FPS increases by +20%.
for(dy=mirrorsy2-mirrorsy1-1; dy>=0; dy--)
{
copybufbyte((void *)(p),tempbuf,mirrorsx2+1);
tempbuf[mirrorsx2] = tempbuf[mirrorsx2-1];
copybufreverse(&tempbuf[mirrorsx2],(void *)(p+i),mirrorsx2+1);
p += ylookup[1];
faketimerhandler();
}
}
int sectorofwall(short theline)
{
int32_t i, gap;
if ((theline < 0) || (theline >= numwalls)) return(-1);
i = wall[theline].nextwall;
if (i >= 0) return(wall[i].nextsector);
gap = (numsectors>>1);
i = gap;
while (gap > 1)
{
gap >>= 1;
if (sector[i].wallptr < theline) i += gap;
else i -= gap;
}
while (sector[i].wallptr > theline) i--;
while (sector[i].wallptr+sector[i].wallnum <= theline) i++;
return(i);
}
int getceilzofslope(short sectnum, int32_t dax, int32_t day)
{
int32_t dx, dy, i, j;
walltype *wal;
if (!(sector[sectnum].ceilingstat&2)) return(sector[sectnum].ceilingz);
wal = &wall[sector[sectnum].wallptr];
dx = wall[wal->point2].x-wal->x;
dy = wall[wal->point2].y-wal->y;
i = (nsqrtasm(dx*dx+dy*dy)<<5);
if (i == 0) return(sector[sectnum].ceilingz);
j = dmulscale3(dx,day-wal->y,-dy,dax-wal->x);
return(sector[sectnum].ceilingz+scale(sector[sectnum].ceilingheinum,j,i));
}
int getflorzofslope(short sectnum, int32_t dax, int32_t day)
{
int32_t dx, dy, i, j;
walltype *wal;
if (!(sector[sectnum].floorstat&2)) return(sector[sectnum].floorz);
wal = &wall[sector[sectnum].wallptr];
dx = wall[wal->point2].x-wal->x;
dy = wall[wal->point2].y-wal->y;
i = (nsqrtasm(dx*dx+dy*dy)<<5);
if (i == 0) return(sector[sectnum].floorz);
j = dmulscale3(dx,day-wal->y,-dy,dax-wal->x);
return(sector[sectnum].floorz+scale(sector[sectnum].floorheinum,j,i));
}
void getzsofslope(short sectnum, int32_t dax, int32_t day, int32_t *ceilz, int32_t *florz)
{
int32_t dx, dy, i, j;
walltype *wal, *wal2;
sectortype *sec;
sec = §or[sectnum];
*ceilz = sec->ceilingz;
*florz = sec->floorz;
if ((sec->ceilingstat|sec->floorstat)&2)
{
wal = &wall[sec->wallptr];
wal2 = &wall[wal->point2];
dx = wal2->x-wal->x;
dy = wal2->y-wal->y;
i = (nsqrtasm(dx*dx+dy*dy)<<5);
if (i == 0) return;
j = dmulscale3(dx,day-wal->y,-dy,dax-wal->x);
if (sec->ceilingstat&2) *ceilz = (*ceilz)+scale(sec->ceilingheinum,j,i);
if (sec->floorstat&2) *florz = (*florz)+scale(sec->floorheinum,j,i);
}
}
void alignceilslope(short dasect, int32_t x, int32_t y, int32_t z)
{
int32_t i, dax, day;
walltype *wal;
wal = &wall[sector[dasect].wallptr];
dax = wall[wal->point2].x-wal->x;
day = wall[wal->point2].y-wal->y;
i = (y-wal->y)*dax - (x-wal->x)*day;
if (i == 0) return;
sector[dasect].ceilingheinum = scale((z-sector[dasect].ceilingz)<<8,
nsqrtasm(dax*dax+day*day),i);
if (sector[dasect].ceilingheinum == 0) sector[dasect].ceilingstat &= ~2;
else sector[dasect].ceilingstat |= 2;
}
void alignflorslope(short dasect, int32_t x, int32_t y, int32_t z)
{
int32_t i, dax, day;
walltype *wal;
wal = &wall[sector[dasect].wallptr];
dax = wall[wal->point2].x-wal->x;
day = wall[wal->point2].y-wal->y;
i = (y-wal->y)*dax - (x-wal->x)*day;
if (i == 0) return;
sector[dasect].floorheinum = scale((z-sector[dasect].floorz)<<8,
nsqrtasm(dax*dax+day*day),i);
if (sector[dasect].floorheinum == 0) sector[dasect].floorstat &= ~2;
else sector[dasect].floorstat |= 2;
}
int loopnumofsector(short sectnum, short wallnum)
{
int32_t i, numloops, startwall, endwall;
numloops = 0;
startwall = sector[sectnum].wallptr;
endwall = startwall + sector[sectnum].wallnum;
for(i=startwall; i<endwall; i++)
{
if (i == wallnum) return(numloops);
if (wall[i].point2 < i) numloops++;
}
return(-1);
}
void setfirstwall(short sectnum, short newfirstwall)
{
int32_t i, j, k, numwallsofloop;
int32_t startwall, endwall, danumwalls, dagoalloop;
startwall = sector[sectnum].wallptr;
danumwalls = sector[sectnum].wallnum;
endwall = startwall+danumwalls;
if ((newfirstwall < startwall) || (newfirstwall >= startwall+danumwalls)) return;
for(i=0; i<danumwalls; i++)
memcpy(&wall[i+numwalls],&wall[i+startwall],sizeof(walltype));
numwallsofloop = 0;
i = newfirstwall;
do
{
numwallsofloop++;
i = wall[i].point2;
} while (i != newfirstwall);
/* Put correct loop at beginning */
dagoalloop = loopnumofsector(sectnum,newfirstwall);
if (dagoalloop > 0)
{
j = 0;
while (loopnumofsector(sectnum,j+startwall) != dagoalloop) j++;
for(i=0; i<danumwalls; i++)
{
k = i+j;
if (k >= danumwalls) k -= danumwalls;
memcpy(&wall[startwall+i],&wall[numwalls+k],sizeof(walltype));
wall[startwall+i].point2 += danumwalls-startwall-j;
if (wall[startwall+i].point2 >= danumwalls)
wall[startwall+i].point2 -= danumwalls;
wall[startwall+i].point2 += startwall;
}
newfirstwall += danumwalls-j;
if (newfirstwall >= startwall+danumwalls) newfirstwall -= danumwalls;
}
for(i=0; i<numwallsofloop; i++)
memcpy(&wall[i+numwalls],&wall[i+startwall],sizeof(walltype));
for(i=0; i<numwallsofloop; i++)
{
k = i+newfirstwall-startwall;
if (k >= numwallsofloop) k -= numwallsofloop;
memcpy(&wall[startwall+i],&wall[numwalls+k],sizeof(walltype));
wall[startwall+i].point2 += numwallsofloop-newfirstwall;
if (wall[startwall+i].point2 >= numwallsofloop)
wall[startwall+i].point2 -= numwallsofloop;
wall[startwall+i].point2 += startwall;
}
for(i=startwall; i<endwall; i++)
if (wall[i].nextwall >= 0) wall[wall[i].nextwall].nextwall = i;
}
/* end of engine.c ... */