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http://ftp.ksu.edu.tw/FTP/FreeBSD/distfiles/xscreensaver-4.23.tar.gz
[xscreensaver]
/
hacks
/
glx
/
gltrackball.h
diff --git
a/hacks/glx/gltrackball.h
b/hacks/glx/gltrackball.h
index 3d8ef667bca1a3bd9948308f7ad7f5faafa43b24..966db04a688a8a8f469a2112b416119d76641351 100644
(file)
--- 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);
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__ */
#endif /* __GLTRACKBALL_H__ */