ref: b622d928912018951b333d6f7e002fa83a71d3cd
parent: c135b5af7abfefe595e109a90becc0281892a9ba
author: aiju <[email protected]>
date: Fri Sep 16 09:32:48 EDT 2011
added games/mandel
--- /dev/null
+++ b/sys/src/games/mandel.c
@@ -1,0 +1,238 @@
+#include <u.h>
+#include <libc.h>
+#include <draw.h>
+#include <thread.h>
+#include <mouse.h>
+#include <cursor.h>
+
+enum { ncolors = 600 };+
+double xmin = -2, xmax = 1;
+double ymin = -1, ymax = 1;
+Mousectl *mctl;
+Rendez rend;
+int stopdraw;
+uchar *imagedata;
+Image *image;
+extern Cursor reading;
+uchar colors[3 * (ncolors + 1)];
+
+double
+convx(Rectangle *r, int x)
+{+ return (xmax - xmin) * (x - r->min.x) / (r->max.x - r->min.x) + xmin;
+}
+
+double
+convy(Rectangle *r, int y)
+{+ return (ymax - ymin) * (r->max.y - y) / (r->max.y - r->min.y) + ymin;
+}
+
+void
+pixel(int x, int y)
+{+ draw(screen, Rect(x, y, x + 1, y + 1), display->black, nil, ZP);
+}
+
+ulong
+iterate(double x, double y)
+{+ int i;
+ double zx, zy, zx2, zy2, v;
+
+ zx = zy = zx2 = zy2 = 0;
+ for(i = 0; i < 100; i++){+ zy = 2 * zx * zy + y;
+ zx = zx2 - zy2 + x;
+ zx2 = zx * zx;
+ zy2 = zy * zy;
+ if(zx2 + zy2 >= 4){+ v = 2 + i - log(log(sqrt(zx2 + zy2)) / log(i + 2)) / 0.69314718;
+ return (int)(v * 1000) % ncolors;
+ }
+ }
+ return 0;
+}
+
+void
+redrawproc(void *)
+{+ int x, y;
+ uchar *p, *q;
+
+ qlock(rend.l);
+ for(;;){+ setcursor(mctl, &reading);
+ p = imagedata;
+ for(y = screen->r.min.y; y < screen->r.max.y; y++)
+ for(x = screen->r.min.x; x < screen->r.max.x; x++){+ if(stopdraw)
+ goto check;
+ q = colors + 3 * iterate(convx(&screen->r, x), convy(&screen->r, y));
+ *p++ = *q++;
+ *p++ = *q++;
+ *p++ = *q;
+ }
+ if(stopdraw)
+ goto check;
+ lockdisplay(display);
+ loadimage(image, image->r, imagedata, Dx(image->r) * Dy(image->r) * 3);
+ draw(screen, screen->r, image, nil, screen->r.min);
+ flushimage(display, 1);
+ unlockdisplay(display);
+ check:
+ stopdraw = 0;
+ setcursor(mctl, nil);
+ rsleep(&rend);
+ stopdraw = 0;
+ }
+}
+
+void
+zoom(void)
+{+ Rectangle r;
+ double xmin_, xmax_, ymin_, ymax_;
+
+ r = getrect(3, mctl);
+ if(r.min.x == 0 && r.min.y == 0 && r.max.x == 0 && r.max.y == 0)
+ return;
+ xmin_ = convx(&screen->r, r.min.x);
+ xmax_ = convx(&screen->r, r.max.x);
+ ymin_ = convy(&screen->r, r.max.y);
+ ymax_ = convy(&screen->r, r.min.y);
+ stopdraw = 1;
+ qlock(rend.l);
+ xmin = xmin_;
+ xmax = xmax_;
+ ymin = ymin_;
+ ymax = ymax_;
+ rwakeup(&rend);
+ qunlock(rend.l);
+}
+
+char *menus[] = {+ "zoom in",
+ "reset",
+ "quit",
+ nil,
+};
+
+Menu menu = {+ .item = menus
+};
+
+void
+resizethread(void *)
+{+ ulong l;
+
+ for(;;){+ if(recv(mctl->resizec, &l) < 1)
+ continue;
+ stopdraw = 1;
+ qlock(rend.l);
+ if(getwindow(display, Refnone) < 0)
+ sysfatal("getwindow: %r");+ freeimage(image);
+ free(imagedata);
+ image = allocimage(display, screen->r, RGB24, 0, DBlack);
+ imagedata = malloc(3 * Dx(screen->r) * Dy(screen->r));
+ rwakeup(&rend);
+ qunlock(rend.l);
+ }
+}
+
+void
+initcolors(void)
+{+ uchar *p;
+ int h, x;
+
+ for(p = colors + 3, h = 0; p < colors + nelem(colors); h++){+ x = 0xFF - abs(h % (ncolors / 3) - ncolors / 6) * 0xFF / (ncolors / 6);
+ if(h < ncolors/6){+ *p++ = 0xFF;
+ *p++ = x;
+ *p++ = 0;
+ }else if(h < ncolors/3){+ *p++ = x;
+ *p++ = 0xFF;
+ *p++ = 0;
+ }else if(h < ncolors/2){+ *p++ = 0;
+ *p++ = 0xFF;
+ *p++ = x;
+ }else if(h < 2*ncolors/3){+ *p++ = 0;
+ *p++ = x;
+ *p++ = 0xFF;
+ }else if(h < 5*ncolors/6){+ *p++ = x;
+ *p++ = 0;
+ *p++ = 0xFF;
+ }else{+ *p++ = 0xFF;
+ *p++ = 0;
+ *p++ = x;
+ }
+ }
+}
+
+void
+threadmain()
+{+ static QLock ql;
+ int rc;
+
+ if(initdraw(nil, nil, "mandelbrot") < 0)
+ sysfatal("initdraw: %r");+ display->locking = 1;
+ unlockdisplay(display);
+ if((mctl = initmouse(nil, screen)) == nil)
+ sysfatal("initmouse: %r");+ rend.l = &ql;
+ image = allocimage(display, screen->r, RGB24, 0, DBlack);
+ imagedata = malloc(3 * Dx(screen->r) * Dy(screen->r));
+ initcolors();
+ proccreate(redrawproc, nil, mainstacksize);
+ threadcreate(resizethread, nil, mainstacksize);
+ for(;;){+ readmouse(mctl);
+ if(mctl->buttons & 4){+ lockdisplay(display);
+ rc = menuhit(3, mctl, &menu, nil);
+ unlockdisplay(display);
+ switch(rc){+ case 0:
+ zoom();
+ break;
+ case 1:
+ stopdraw = 1;
+ qlock(rend.l);
+ xmin = -2;
+ xmax = 1;
+ ymin = -1;
+ ymax = 1;
+ rwakeup(&rend);
+ qunlock(rend.l);
+ break;
+ case 2:
+ threadexitsall(nil);
+ }
+ }
+ }
+}
+
+Cursor reading = {+ {-1, -1},+ {0xff, 0x80, 0xff, 0x80, 0xff, 0x00, 0xfe, 0x00, + 0xff, 0x00, 0xff, 0x80, 0xff, 0xc0, 0xef, 0xe0,
+ 0xc7, 0xf0, 0x03, 0xf0, 0x01, 0xe0, 0x00, 0xc0,
+ 0x03, 0xff, 0x03, 0xff, 0x03, 0xff, 0x03, 0xff, },
+ {0x00, 0x00, 0x7f, 0x00, 0x7e, 0x00, 0x7c, 0x00, + 0x7e, 0x00, 0x7f, 0x00, 0x6f, 0x80, 0x47, 0xc0,
+ 0x03, 0xe0, 0x01, 0xf0, 0x00, 0xe0, 0x00, 0x40,
+ 0x00, 0x00, 0x01, 0xb6, 0x01, 0xb6, 0x00, 0x00, }
+};
--- a/sys/src/games/mkfile
+++ b/sys/src/games/mkfile
@@ -11,6 +11,7 @@
mole\
glendy\
packet\
+ mandel\
OFILES=
HFILES=