From http://www.jwz.org/xscreensaver/xscreensaver-5.18.tar.gz

[xscreensaver] / hacks / glx / hilbert.c

diff --git a/hacks/glx/hilbert.c b/hacks/glx/hilbert.c
index c9ee163f648c4e73d6f89675330dd24a5e9e9620..d8966f45c339eed72cc0e5f09c2079ffb531c598 100644 (file)
--- a/hacks/glx/hilbert.c
+++ b/hacks/glx/hilbert.c
@@ -1017,7 +1017,10 @@ draw_hilbert (ModeInfo *mi)
                  (y - 0.5) * 8,
                  (z - 0.5) * 15);
 
+    /* Do it twice because we don't track the device's orientation. */
+    glRotatef( current_device_rotation(), 0, 0, 1);
     gltrackball_rotate (bp->trackball);
+    glRotatef(-current_device_rotation(), 0, 0, 1);
 
     get_rotation (bp->rot, &x, &y, &z, !bp->button_down_p);