if you use 2 * M_PI a lot (i don't know if you do) and if M_PI is a constant, then I'd add another constant M2_PI (or something like that). then you would save a float operation :)
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if you use 2 * M_PI a lot (i don't know if you do) and if M_PI is a constant, then I'd add another constant M2_PI (or something like that). then you would save a float operation :)