[Mesa3d-users] GLU 1.2 tesselator bugs ?

[Olivier M. <Oli...@cy...>]

Hello,

I recently moved from Mesa-3.0 to Mesa-3.2 and I had to update the GLU
tesselator from 1.0 to 1.2. Although I followed the guidelines explained
in the Red Book, the results weren't good at all:
Some faces were reversed (wong side) and I got many crashes in glu
library (apparently memory leaks) when the vertices of a non-convex
polygon didn't lie exactly in the same plane.

I could identify more precisely one bug:

The gluTessNormal is ignored for re-orienting vertices whereas it should
be used (as described in the OpenGL Reference and User manuals). This
makes some faces appear on the wrong side. I found a workaround for this
bug by calling glCullFace(GL_FRONT) just before drawing a face for which
the normal direction is negative (and should reverse the vertice order).
But this is an ugly workaround (as often).

I am now trying to identify better the crash problems.

Anyone else experienced such problems ? Could fix them easily ?
Who is the main maintainer of GLU ?
Would you like I submit some source code exhibiting the problems ?

Thanks,

-Olivier