Subject:
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Re: Problem with LDView
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Newsgroups:
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lugnet.cad
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Date:
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Sat, 28 Jun 2008 03:12:03 GMT
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Viewed:
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10383 times
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In lugnet.cad, Roland Melkert wrote:
> While writing the LD4DStudio rendering code, I also had some problems
> with AV crashes. It turned out being caused by mixed glDrawElement usage
> (with / without glBindbuffer usage).
>
> I fixed it by calling:
>
> glBindBuffer(GL_ARRAY_BUFFER, 0);
> glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0)
>
> before using glVertexPointer and glNormalPointer incombination with
> glDrawElements the 'normal' way instead of the 'vbo' way.
>
> My system back then had an ATI 9800 Pro. It seems the ati driver does
> not reset some internal stuff when calling glDrawElements with pointers
> instead of VBO id's.
>
> Hope this helps.
Thanks. It's actually crashing when VBO is used in LDView, and not crashing
when VBO isn't used. However, I'll take a look at my pointer calls to see if
there are any bound buffers at the time of the calls. When I initially
implemented the VBO support, ATI cards would crash if VBO was used inside a
display list, so I had to work around that. And while VBO isn't useful inside a
display list, making sure it didn't happen added complexity to my code that
shouldn't have been necessary.
--Travis
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Message is in Reply To:
 | | Re: Problem with LDView
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| (...) While writing the LD4DStudio rendering code, I also had some problems with AV crashes. It turned out being caused by mixed glDrawElement usage (with / without glBindbuffer usage). I fixed it by calling: glBindBuffer(GL_ARRAY_BUFFER, 0); (...) (18 years ago, 27-Jun-08, to lugnet.cad)
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