Re: [PyOpenGL-Users] Vista, PyOpengl 3.0.1b2 and VBO's

[Nils S. <su...@gm...>]

Addendum: Adding WX_GL_RGBA in addition to WX_GL_DOUBLEBUFFER as options to
wxPython.GLCanvas also worked. Weird stuff, but probably this is a fault in
wxPython (in combination with Vista?).

On Sun, Jan 24, 2010 at 9:56 PM, Nils Sudmann <su...@gm...> wrote:

> Found the faulty code.
>
> I was using wxPython GLCanvas and specified WX_GL_DOUBLEBUFFER. After
> rewriting the code to use old vertex arrays, it kind of worked, but a lot of
> other stuff was strange. It seems that WX_GL_DOUBLEBUFFER caused GL_VERSION
> to report 1.1.0 and probably disabled all the buffer object functionality
> and other stuff. Removing the doublebuffer option caused GL_VERSION to
> report 3.2.0 and everything worked!
>
> Again thanks for all the help.
>
>
> On Sun, Jan 24, 2010 at 3:01 PM, Alejandro Segovia <as...@gm...>wrote:
>
>> On Sun, Jan 24, 2010 at 9:15 AM, Gijs <in...@bs...> wrote:
>>
>>> On 1/24/10 12:06 , Nils Sudmann wrote:
>>> > Hmm,
>>> >
>>> > I checked some versions and here is what I found:
>>> >
>>> > Vista - PyOpenGL 3.0.1b2, GL_VERSION = 1.1.0 (!!!)
>>> > Fedora 11 - PyOpenGL 3.0.0, GL_VERSION = None (!!!)
>>> >
>>> > Suse 11 - At work, need to check this tomorrow.
>>> >
>>> > About vista, the GL_VERSION string seems odd. I tried a OpenGL
>>> > extension viewer that reports OpenGL version 3.2. Again, I'm clueless
>>> > to why PyOpenGL thinks it is dealing with a 1.1 driver.
>>> >
>>> > My Fedora server has a ATI X800 card, and AFAIK AMD/ATI has dropped
>>> > support for "older" cards on newer kernels (ATI is on my do not buy
>>> > list). But I managed to get it working somehow, at least glxinfo
>>> > reports that everything is ok (OpenGL version string: 2.1 Mesa
>>> > 7.6-devel). I did download and upgrade PyOpenGL to 3.0.1b2, but it
>>> > still reports a GL_VERSION of None.
>>> >
>>> > So it seems that on both affected systems, there is something wrong
>>> > with my GL setup.
>>> Well, the problem on Fedora is that you are using the mesa driver. This
>>> does some basic GL stuff but don't expect it do anything more than
>>> render some polygons. You'll need to opensource ATI driver which gives
>>> you more GL functions, or you could try out the driver of ATI. About
>>> Windows, the OpenGL version 1.1.0 has something to do with the version
>>> reported back by the OpenGL library itself. This will never report any
>>> higher than 1.1.0 I think. You'd probably get a better idea as to why
>>> this happens when you google for it.
>>>
>>> You might have better luck trying out the ARB functions (glGenBuffersARB
>>> and glBindBufferARB). These should work if your OpenGL installation is
>>> good.
>>>
>>>
>> I agree with Gijs. As far as mesa goes, it's just an OpenGL-like API which
>> doesn't usually provide hardware rendering support. VBO's may well be out of
>> its league. You are going to need the ATI driver here.
>>
>> Regarding Windows reporting 1.1, it's not that weird. I've had NVIDIA
>> drivers reporting up to OpenGL 2.0, but usually Windows does not provide
>> functionality beyond 1.1 without the use of extensions.
>>
>> As Gijs said, try using the glGenBuffersARB extension instead of
>> glGenBuffers (I think it's under the OpenGL.ext package).
>>
>> Let us know how it goes ;)
>>
>> Alejandro.-
>>
>>
>>
>>> Regards, Gijs
>>>
>>>
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>>
>>
>
>
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