X-Git-Url: http://git.hungrycats.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=hacks%2Fglx%2Fgltrackball.c;h=ee54cf91d2432f4a541774a742621d77286a54c4;hb=3f1091236d800c43a3124c44c7da54e53f205b13;hp=c0ccaa133d54f246f8e53a170b63733a8c40333b;hpb=f8cf5ac7b2f53510f80a0eaf286a25298be17bfe;p=xscreensaver

diff --git a/hacks/glx/gltrackball.c b/hacks/glx/gltrackball.c
index c0ccaa13..ee54cf91 100644
--- a/hacks/glx/gltrackball.c
+++ b/hacks/glx/gltrackball.c
@@ -29,6 +29,8 @@
 #include "trackball.h"
 #include "gltrackball.h"
 
+extern double current_device_rotation (void);  /* Bah, it's in fps.h */
+
 struct trackball_state {
   int x, y;
   GLfloat q[4];
@@ -55,6 +57,7 @@ gltrackball_reset (trackball_state *ts)
   trackball (ts->q, 0, 0, 0, 0);
 }
 
+
 /* Begin tracking the mouse: Call this when the mouse button goes down.
    x and y are the mouse position relative to the window.
    w and h are the size of the window.
@@ -113,8 +116,8 @@ gltrackball_mousewheel (trackball_state *ts,
                         int button, int percent, int flip_p)
 {
   int up_p;
-  double move;
   int horizontal_p;
+  int mx, my, move, scale;
 
 #ifdef HAVE_COCOA
   flip_p = 0;      /* MacOS has already handled this. */
@@ -134,15 +137,14 @@ gltrackball_mousewheel (trackball_state *ts,
       up_p = !up_p;
     }
 
+  scale = mx = my = 1000;
   move = (up_p
-          ? 1.0 - (percent / 100.0)
-          : 1.0 + (percent / 100.0));
-
-  gltrackball_start (ts, 50, 50, 100, 100);
-  if (horizontal_p)
-    gltrackball_track (ts, 50*move, 50, 100, 100);
-  else
-    gltrackball_track (ts, 50, 50*move, 100, 100);
+          ? floor (scale * (1.0 - (percent / 100.0)))
+          : ceil  (scale * (1.0 + (percent / 100.0))));
+  if (horizontal_p) mx = move;
+  else              my = move;
+  gltrackball_start (ts, scale, scale, scale*2, scale*2);
+  gltrackball_track (ts, mx, my, scale*2, scale*2);
 }
 
 void