Re: [PyOpenGL-Users] getting the feedback buffer

[noema <mai...@sh...>]

Ok ... I figured it out. It is either a bug in Mesa or in pyopengl.
According to the developer list, pyopengl 2.0.1.07 upwards should have 
fixed that problem. Also the version of Mesa that comes with Xfree 4.3 
does not support the feedback buffer.

Updating to pyopengl 2.0.1.08 and using hardware-accelarated DRI 
rendering solved the problem for me (I am on ubuntulinux 4.1 with ati 
binary driver)

_noema



noema wrote:
> 
> 
> This is driving me NUTTSS!!
> no matter what I do I get a...
> 
> "Unknown vertex type in feedback buffer."
> 
> ...when I try to switch back to glRenderMode(GL_RENDER).
> 
> Does anybody of you have a working example or can give me a hint to the 
> problem...would really appreciate it!
> 
> _nailobe
> 
> 
> 
> In my draw methode I use the following code:
> 
>         glFeedbackBuffer(32768, GL_2D)
>         glRenderMode(GL_FEEDBACK)
> 
>         # self._onDraw()
>         glPassThrough(110)
>         glBegin(GL_LINE_STRIP)
>         glVertex3f(0.0, 0.0, 0.0)
>         glVertex3f(1.0, 0.0, 0.0)
>         glVertex3f(1.0, 1.0, 0.0)
>         glVertex3f(-0.5, 1.5, 0.0)
>         glVertex3f(0.0, 0.0, 0.0)
>         glEnd()
> 
>         feedbackBuffer = glRenderMode(GL_RENDER)
> 
> 
> 
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