Re: OpenGL error

I'm getting the exact same error has Doug.  My stacks look pretty much the same as Doug's as well.

I'm also running on x64 Ubuntu 8.04, but with GeForce 8800GT and NVIDIA driver version 173.14.12. 
gl-extensions is reporting that I have both GL_ARB_shader_objects and GL_EXT_framebuffer_object as well.

-Bill

----- Original Message ----
From: Joe Groff <arcata@...>
To: factor-talk@...
Sent: Tuesday, September 30, 2008 12:51:11 PM
Subject: Re: [Factor-talk] OpenGL error

On Tue, Sep 30, 2008 at 9:35 AM, Doug Coleman <doug.coleman@...> wrote:
> Hi Joe,
>
> I'm running x64 Ubuntu 8.04 with a GeForce 8600 GT and the NVIDIA
> driver.  The two required extensions are reported by gl-extensions,
> but the spheres doesn't work.
>
> Running spheres gives me a black spheres window and a popup window saying:

Doug, I did find one problem in the spheres code. NVidia's GLSL
compiler is clever enough to optimize away vertex attributes that
aren't actually used in the linked shader program; this causes the
"surface_color" attribute to disappear in the shader program that
draws the textured sphere (which doesn't need a surface color, seeing
as it uses a texture to color itself), and an OpenGL error gets raised
when the code tries to set that attribute. That doesn't seem at all
related to your framebuffer error, though.

-Joe

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