(OpenGL 3.1 - 4.2) (GLSL) Efficient Uniform Variables?

Question

I'm planning on rendering multiple instances of a single model by modifying various uniform variables (such as location, rotation, et al.).

Is there a better way then modifying the uniform variables for every instance I want to render?

Nicol Bolas · Accepted Answer · 2012-10-16 22:53:28Z

4

For instanced rendering you can use the ARB_instanced_arrays extension. With this extension you can define your not-so-uniform variables in a standard vertex array, and with the glVertexAttribDivisor function you can fine tune when the not-so-uniform variable change.

edited Oct 16, 2012 at 22:53

Nicol Bolas

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answered Mar 20, 2012 at 6:54

tbalazs

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Christian Rau Over a year ago

As a side note, instanced arrays have been made core in OpenGL 3.3. And even before that you could still use instanced rendering (which is core since GL 3.0 or 3.1, I think). You just have to store the per-instance parameters in a uniform array/buffer and access them using the special shader variable gl_InstanceID.

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