X-Git-Url: http://git.hungrycats.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=hacks%2Fflame.c;h=0cc7f65970fb5f0f8e1ca7d790319e97fb97504c;hb=f65151994eba80ecabcdac6eef6fa0dde7e2d45b;hp=d723f055e8cee09572da6171878936590a477f99;hpb=f3e0240915ed9f9b3a61781f5c7002d587563fe0;p=xscreensaver

diff --git a/hacks/flame.c b/hacks/flame.c
index d723f055..0cc7f659 100644
--- a/hacks/flame.c
+++ b/hacks/flame.c
@@ -1,5 +1,5 @@
-/* xscreensaver, Copyright (c) 1993, 1995, 1996
- *  Jamie Zawinski <jwz@netscape.com>
+/* xscreensaver, Copyright (c) 1993, 1995, 1996, 1998
+ *  Jamie Zawinski <jwz@jwz.org>
  *
  * Permission to use, copy, modify, distribute, and sell this software and its
  * documentation for any purpose is hereby granted without fee, provided that
@@ -167,7 +167,7 @@ recurse (double x, double y, int l, Display *dpy, Window win)
 	      XDrawPoints (dpy, win, gc, points, num_points, CoordModeOrigin);
 	      num_points = 0;
 	      /* if (delay) usleep (delay); */
-	      /* XSync (dpy, True); */
+	      /* XSync (dpy, False); */
 	    }
 	}
     }
@@ -175,6 +175,14 @@ recurse (double x, double y, int l, Display *dpy, Window win)
     {
       for (i = 0; i < snum; i++)
 	{
+
+	  /* Scale back when values get very large. Spot sez:
+	     "I think this happens on HPUX.  I think it's non-IEEE
+	     to generate an exception instead of a silent NaN."
+	   */
+	  if ((abs(x) > 1.0E5) || (abs(y) > 1.0E5))
+	    x = x / y;
+
 	  nx = f[0][0][i] * x + f[0][1][i] * y + f[0][2][i];
 	  ny = f[1][0][i] * x + f[1][1][i] * y + f[1][2][i];
 	  if (i < anum)
@@ -348,7 +356,7 @@ flame (Display *dpy, Window window)
   total_points = 0;
   (void) recurse (0.0, 0.0, 0, dpy, window);
   XDrawPoints (dpy, window, gc, points, num_points, CoordModeOrigin);
-  XSync (dpy, True);
+  XSync (dpy, False);
   if (delay) usleep (delay);
 }
 
@@ -373,8 +381,8 @@ int matherr(x)
 char *progclass = "Flame";
 
 char *defaults [] = {
-  "Flame.background:	black",		/* to placate SGI */
-  "Flame.foreground:	white",
+  ".background:	black",
+  ".foreground:	white",
   "*colors:	64",
   "*iterations:	25",
   "*delay:	50000",
@@ -397,5 +405,8 @@ screenhack (Display *dpy, Window window)
 {
   init_flame (dpy, window);
   while (1)
-    flame (dpy, window);
+    {
+      flame (dpy, window);
+      screenhack_handle_events (dpy);
+    }
 }