From http://www.jwz.org/xscreensaver/xscreensaver-5.22.tar.gz

[xscreensaver] / hacks / substrate.c

diff --git a/hacks/substrate.c b/hacks/substrate.c
index 6b0cb823bfe0c2ca9112fce1d34f04a1617991f7..82ea6d9ee81bedf4b2dc720de28e6ae64ad134d9 100644 (file)
--- a/hacks/substrate.c
+++ b/hacks/substrate.c
@@ -198,6 +198,13 @@ static inline void start_crack(struct field *f, crack *cr)
         /* We timed out.  Use our default values */
         px = cr->x;
         py = cr->y;
+
+        /* Sanity check needed */
+        if (px < 0) px = 0;
+        if (px >= f->width) px = f->width - 1;
+        if (py < 0) py = 0;
+        if (py >= f->height) py = f->height - 1;
+
         ref_cgrid(f, px, py) = cr->t;
     }
 
@@ -311,7 +318,6 @@ static inline unsigned long rgb2point(int depth, int r, int g, int b)
 
     switch(depth) {
         case 32:
-            ret = 0xff000000;
         case 24:
 #ifdef HAVE_COCOA
             /* This program idiotically does not go through a color map, so
@@ -487,16 +493,11 @@ movedrawcrack(struct state *st, GC fgc, struct field *f, int cracknum)
         cr->y += ((float) STEP * sin(cr->t * M_PI/180));
     }
     else {
-        float oldx, oldy;
-
-        oldx = cr->x;
-        oldy = cr->y;
-
         cr->x += ((float) cr->ys * cos(cr->t * M_PI/180));
         cr->y += ((float) cr->ys * sin(cr->t * M_PI/180));
 
         cr->x += ((float) cr->xs * cos(cr->t * M_PI/180 - M_PI / 2));
-        cr->x += ((float) cr->xs * sin(cr->t * M_PI/180 - M_PI / 2));
+        cr->y += ((float) cr->xs * sin(cr->t * M_PI/180 - M_PI / 2));
 
         cr->t += cr->t_inc;
         cr->degrees_drawn += abs(cr->t_inc);
@@ -684,6 +685,7 @@ substrate_draw (Display *dpy, Window window, void *closure)
     XSetForeground(st->dpy, st->fgc, st->gcv.foreground);
   }
 
+  /* #### mi->recursion_depth = st->f->cycles; */
   return st->growth_delay;
 }
 
@@ -718,6 +720,9 @@ static const char *substrate_defaults[] = {
     "*maxCracks: 100",
     "*sandGrains: 64",
     "*circlePercent: 33",
+#ifdef USE_IPHONE
+  "*ignoreRotation: True",
+#endif
     0
 };