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Multiple texture coordinates with VBOs?

Posted Wednesday, 16 December, 2009 - 16:44 by VeliV in

Hi ya.

How could I tell OpenGL that my model has 2 sets of uve coordinates (one for textures one for lightmap)?

I have been trying to use GL.TexCoordPointer but havent had much luck with that. Is there some other method I could use?

‹ "Invalid value" when loading texture VBOs with colours ›

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VeliV's picture

Re: Multiple texture coordinates with VBOs?

Posted Wednesday, 16 December, 2009 - 16:49 by VeliV

*meh*

Why do I always figure these thing out after I have already posted a topic?

I changed the code to this:

			GL.TexCoordPointer( 	4, 	TexCoordPointerType.Float, 	10 * sizeof( float ), (IntPtr) ( 6 * sizeof( float ) ) );
 
			//GL.TexCoordPointer( 2,	TexCoordPointerType.Float,	10 * sizeof( float ), (IntPtr) ( 8 * sizeof( float ) ) );

giving it 4 floats instead of 2.

After that I changed my shader to

uniform sampler2D tex;
uniform sampler2D light;
 
void main()
{
	gl_FragColor = gl_Color * 
				 texture2D(tex, gl_TexCoord[0].xy) *
				 texture2D(light, gl_TexCoord[0].zw);
}

so the lightmap texture uses the z and w floats.