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

[xscreensaver] / hacks / glx / moebius.c

diff --git a/hacks/glx/moebius.c b/hacks/glx/moebius.c
index a9dddf50c026f86de8487cddc9a4a0a88745cc8c..e37294a1580dbb96eebcc990a668fe9d7816d2d3 100644 (file)
--- a/hacks/glx/moebius.c
+++ b/hacks/glx/moebius.c
@@ -761,7 +761,10 @@ draw_moebius (ModeInfo * mi)
 
        glTranslatef(0.0, 0.0, -10.0);
 
+    /* Do it twice because we don't track the device's orientation. */
+    glRotatef( current_device_rotation(), 0, 0, 1);
     gltrackball_rotate (mp->trackball);
+    glRotatef(-current_device_rotation(), 0, 0, 1);
 
        if (!MI_IS_ICONIC(mi)) {
                glScalef(Scale4Window * mp->WindH / mp->WindW, Scale4Window, Scale4Window);