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beb05f28ff
And maybe a nano-optimization. Switching from (~side + 1) to (-side) seems to give glsl a very tiny speed boost, but certainly doesn't hurt. Looking at some assembly output for the three cases, the two hacks seem to generate the same code as each other, but 3 instructions vs 6 for ?:. While ?: is more generically robust, the hacks are tuned for the knowledge side is either 0 or 1. The later xor might alter things, but at least I now know that the hack (either version) is worthwhile. |
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