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Multitexturing and Vertex Pointers

Started by skyfire360 Jun 11, 2004 at 8:37 AM 2 replies 650+ views

Original Post

Jun 11, 2004 at 8:37 AM

How would one go about multitexturing with vertex pointers? As far as I can tell, you can only have one texture active when you have a textcoord pointer O.o

mrbastard

108

mrbastard

Jun 11, 2004 at 8:47 AM

something like

glClientActiveTextureARB(GL_TEXTURE1_ARB);
glTexCoordPointer(blah);

the only hard bit is remembering that you need to change the glActiveTexture to change the texture unit''s tex env, but change glClientActiveTexture to change the tex coord pointer.

skyfire360

Author

skyfire360

Jun 11, 2004 at 9:12 AM

Wouldn''t that take multiple passes though?

Say, for instance if you were trying to have three textures on one set of elements...

glClientActiveTextureARB(GL_TEXTURE0_ARB);
glTexCoordPointer(...);
glDrawElements(...);
glClientActiveTextureARB(GL_TEXTURE1_ARB);
glTexCoordPointer(...);
glDrawElements(...);
glClientActiveTextureARB(GL_TEXTURE2_ARB);
glTexCoordPointer(...);
glDrawElements(...);

Is it possible to do something along the lines of...

glClientActiveTextureARB(GL_TEXTURE0_ARB);
glTexCoordPointer(...);
glClientActiveTextureARB(GL_TEXTURE1_ARB);
glTexCoordPointer(...);
glClientActiveTextureARB(GL_TEXTURE2_ARB);
glTexCoordPointer(...);
glDrawElements(...);

mrbastard

108

mrbastard

Jun 11, 2004 at 9:38 AM

???

yes, you set them ALL before calling drawelements or whatever.

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