Faster normalXAngle --> faster sin,cos,tan
Fragment of a discussion from User talk:Rednaxela/FastTrig
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Personally, I wouldn't have any issues with it, but the fact that using a * instead of / probably loses a few ULPS and I'm not sure that is what we want for inside of the game engine. It is still faster than the standard method even using / , but by doing the - in a separate operation there is probably some ULPS loss there as well.
