Re: [Freeglut-developer] gpu or not gpu

[Grafman P. <gr...@gr...>]

As indicated by Steve - FreeGLUT uses whatever OpenGL implementation you've 
linked to.

I recently ported POGL from GLUT to FreeGLUT, and it's definitely using the 
nvidia GPU (tested on Windows and Linux; in the process of testing MacOS).

Any chance you are using the Mesa software binding?

Also - keep in mind that vertex arrays still involve a CPU hit, particularly 
if you are updating it via CPU each frame.  You'll get better performance if 
you use Vertex Buffer Objects (VBOs) - especially if you update it via a 
vertex shader, instead of the CPU.

- Bob


----- Original Message ----- 
From: "Arne Wörner" <arn...@ya...>
To: <fre...@li...>
Sent: Thursday, June 05, 2008 9:40 AM
Subject: [Freeglut-developer] gpu or not gpu


> hi!
>
> does freeglut use the nvidia gpu?
>
> i just tried http://opengl.nutty.org/core/vertex_array.zip
>  with two adaptions (include path/name + added init call)
>  on a geforce7600 with fedora core 8
> and
> the cpu usage climbed to 100% and both (cpu + gpu) were getting hotter...
>
> i wonder what the cpu is doing while the gpu is working...
>
> can somebody explain me that?
>
> thx...
>
> bye
> arne
>
>
>
>
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