Re: [PyOpenGL-Users] glVertexAttribPointer(); loading platform-specific functions

[Mike C. F. <mcf...@vr...>]

Joshua Davis wrote:
> This issue has been resolved. The fault (if any) is not in PyOpenGL.
>
> I've written three C test programs to match my three Python test  
> programs, and the C versions behave identically to the Python  
> versions. It seems that my hardware/driver/OS combination doesn't  
> support setting attribute variables using glVertexAttribPointer(),  
> even though it supports setting attribute variables with  
> glVertexAttrib4f(), etc. (Incidentally, the Mac OS 10.5 driver for  
> the Radeon 9600 supports OpenGL 2.0, but the Mac OS 10.4 driver  
> supports only OpenGL 1.5.)
>
> Thanks everyone for your help -- especially Mike. Cheers.
>   
Thanks for the update.  Nice to know we don't have a PyOpenGL bug
(here).  I'll add a note to the tutorial regarding the
glVertexAttribPointer issue on Macs with that Radeon.

Enjoy,
Mike
> On 2009 Aug 19  , at 5:35 PM, Joshua Davis wrote:
>
>   
>> On 2009 Aug 19  , at 11:59 AM, Mike C. Fletcher wrote:
>>
>>     
>>> Would be nice if we could confirm that this machine can handle
>>> attributes at all (so we know whether this is a problem with the  
>>> wrapper
>>> or the driver).
>>>       
>> I am attaching a new program and its debugging output. This program  
>> uses the legacy glVertexPointer() to specify the vertices, but uses  
>> a "color" attribute variable to specify a single color. It works  
>> correctly; changing "color" to yellow or magenta causes all  
>> fragments to be that color. So my machine/driver/wrapper can handle  
>> individual attribute variables, but it has a problem with attribute  
>> arrays?
>>
>> I'm going to try to get attribute arrays working from C, as you  
>> suggested in your other message. (The specs I've found online for  
>> the Radeon 9600 are too vague to be useful.) Until then I'll stop  
>> pestering you. Thanks for your help!
>>     
>
>
> ------------------------------------------------------------------------------
> Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day 
> trial. Simplify your report design, integration and deployment - and focus on 
> what you do best, core application coding. Discover what's new with 
> Crystal Reports now.  http://p.sf.net/sfu/bobj-july
> _______________________________________________
> PyOpenGL Homepage
> http://pyopengl.sourceforge.net
> _______________________________________________
> PyOpenGL-Users mailing list
> PyO...@li...
> https://lists.sourceforge.net/lists/listinfo/pyopengl-users
>   


-- 
________________________________________________
  Mike C. Fletcher
  Designer, VR Plumber, Coder
  http://www.vrplumber.com
  http://blog.vrplumber.com