From: Chang Hu (changhu_at_cs.umd.edu)
Date: Thu May 04 2006 - 11:58:12 CDT

Hi,

I am trying to hack into the source code to render a ball and mouse
cursor position in the OpenGL window. However I didn't find a way to
refresh the screen or delete previous I drew. I remember there's some
Tcl scripts like "graphics delete ...". Is there a way to do it in the
source code?

Thanks,
 Chang