What I was told on another mailing list, was that rather than doing if/ else, the GLSL 'way' is to use mix().

Im not sure of the correctness of this claim, but it works functionally the same. Ive seen a lot of shader code written this way, but it can hurt readability.


On Feb 27, 2008, at 12:50 PM, Allan Schaffer wrote:

Frequently yes, by design, but sometimes no, it depends on the hardware capabilities and whether the complexity of the branch caused a fallback to software.

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