🚀 go-pugleaf

In article <C1By8u.JFv@news2.cis.umn.edu>, moses@i5.arc.umn.edu writes:
> I am using the GL Widget in combination with motif.  I want to use the 
> overlay plane for rubber-banding.  

A couple of things:

First, are you installing the colormaps?  You need to use
XSetWMColormapWindows to install the colormaps of both the normal and
overlay GL colormaps.  If they aren't installed, you won't get the
correct colors.

Second, and this is probably the problem, you are trying to use RGB
for the overlay planes.  Some of our very high end hardware may
support this (I don't know for sure), but most of the hardware
doesn't; and none of it does with overlays with a depth of 2.  With a
depth of 2 you have exactly 3 colors + transparent; and the best way
to allocate those three colors is to use X color allocation
mechanisms (It is often a good idea to get a new X colormap for the
overlay planes so you don't need to share the 3 colors between
multiple applications).  Then use color (not c3i) to allocate the colors.


Joel Tesler
joel@sgi.com
415-390-3048