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Asked: 2026-05-13T15:20:05+00:00

I’m learning GLES. There are many pair functions like glClientActiveTexture / glActiveTexture . What’s

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I’m learning GLES. There are many pair functions like glClientActiveTexture/glActiveTexture.
What’s the difference between them? (Especially the case of glClientActiveTexture)

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  1. Editorial Team

    From the openGL documentation:

    • glActiveTexture glActiveTexture selects which texture unit subsequent texture state calls will affect.
    • glClientActiveTexture selects the vertex array client state parameters to be modified by glTexCoordPointer.

    On one hand, glClientActiveTexture is used to control subsequent glTexCoordPointer calls (with vertex arrays). On the other hand glActiveTexture affects subsequent calls to glTexCoord calls (used by display lists or immediate mode (non existent in OpenGL ES (AFAIK)).

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