Today I did some investigations in a lookup function for sin(x). Sin(x) takes approx 120 micros and I wanted more speed, and I knew the price was precision. As I worked only in whole degrees a lookup table was the way to go. A straightforward float[361] (1444 bytes!) was not acceptable so folding w…

A faster sin() lookup function.

CrossRoads August 18, 2011, 3:25pm 4

heck, just approximate the whole thing with a triangle wave, so y is just a linear version of x

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