ref: 64307b360c9b55982e9dca4984f8ca9e1007e915
dir: /r_sky.c/
#include "quakedef.h" static int iskyspeed = 8; static int iskyspeed2 = 2; static float skyspeed2; static int r_skymade; static void skyrecalc(void) { skyvars.smask = (skyvars.w - 1)<<16; skyvars.tmask = (skyvars.h - 1)<<16; skyvars.tshift = 16 - qctz(skyvars.w); } /* ============= R_InitSky ============== */ void R_InitSky (texture_t *mt) { int x, y, w, n; pixel_t *src, p; if(mt == nil){ skyvars.w = r_notexture_mip->width; skyvars.h = r_notexture_mip->height; skyvars.source[0] = skyvars.source[1] = r_notexture_mip->pixels; }else{ src = mt->pixels + mt->offsets[0]; w = mt->width; skyvars.h = mt->height; skyvars.w = w/2; n = skyvars.w*skyvars.h; skyvars.source[0] = Hunk_Alloc(n*sizeof(pixel_t)*2); skyvars.source[1] = skyvars.source[0] + n; for(y=0 ; y<skyvars.h; y++){ for(x=0 ; x<skyvars.w; x++){ skyvars.source[0][y*skyvars.w + x] = src[y*w + skyvars.w + x]; if((p = src[y*w + x]) & 0xffffff) skyvars.source[1][y*skyvars.w + x] = p; } } } skyrecalc(); } /* ============= R_SetSkyFrame ============== */ void R_SetSkyFrame (void) { int g, s1, s2; float temp; skyvars.speed = iskyspeed; skyspeed2 = iskyspeed2; g = GreatestCommonDivisor (iskyspeed, iskyspeed2); s1 = iskyspeed / g; s2 = iskyspeed2 / g; temp = skyvars.h * s1 * s2; skyvars.time = cl.time - ((int)(cl.time / temp) * temp); r_skymade = 0; }