http://bugs.freedesktop.org/show_bug.cgi?id=9962
------- Comment #6 from [EMAIL PROTECTED] 2007-08-03 09:08 PST -------
> 2. GL_TRIANGLE_STRIP is a special case when spliting
> for example:
> the vertices are v0, v1, v2, v3, v4, v5, v6 ...
> so triangles should be(v0, v1, v2) (v2, v1, v3) (v2, v3, v4), (v4, v3, v5)...
> if the vertices was splited between v4 and v5, part 2 would be (v3, v4), v5,
> v6... so the first triangle of part 2 is (v3, v4, v5), note the clock order
> differ from (v4, v3, v5). It is severe if GL_CULL_FACE is enabled.
> This patch ensure part1 and part2 have the same clock order.
Looks good, thanks for catching this.
Your patch includes slightly more logic than I think is necessary, would
something like the following work as well?
if (mode == GL_TRIANGLE_STRIP &&
(copy->dstelt_nr & 1))
return GL_FALSE;
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