X-Git-Url: http://git.hungrycats.org/cgi-bin/gitweb.cgi?p=xscreensaver;a=blobdiff_plain;f=hacks%2Fglx%2Fgltrackball.h;h=966db04a688a8a8f469a2112b416119d76641351;hp=3d8ef667bca1a3bd9948308f7ad7f5faafa43b24;hb=0d6b320def9180cf907ceaed56b23a972a11b757;hpb=3f438031d610c7e15fd33876a879b97e290e05fb

diff --git a/hacks/glx/gltrackball.h b/hacks/glx/gltrackball.h
index 3d8ef667..966db04a 100644
--- a/hacks/glx/gltrackball.h
+++ b/hacks/glx/gltrackball.h
@@ -45,5 +45,9 @@ extern void gltrackball_rotate (trackball_state *);
 void gltrackball_mousewheel (trackball_state *ts,
                              int button, int percent, int horizontal_p);
 
+/* Return the quaternion encapsulated by the trackball state.
+ */
+extern void gltrackball_get_quaternion (trackball_state *ts, float q[4]);
+
 #endif /* __GLTRACKBALL_H__ */