What's the most efficient way to handle transparency when working with vertex data? I'm using OpenGL ES 2.0 as well as GLKit. The user has access to a UISlider control that determines what the alpha value should be for each vertex in the model (values 0 to 1). Currently, I have to cycle through each vertex in the model and modify the alpha level on the color coordinates in a for loop. This is incredibly inefficient and slows down processing. Is there another way to handle dynamic transparency for models using vertex data/VBOs? I don't believe GLKit has any built-in ways to handle this using materials or effects either. Correct me if I'm wrong, please.
OpenGL ES 2.0/GLKit Vertex Transparency
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