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#ifndef __MATH_INC
#define __MATH_INC
#define PI 3.14159265358979323846264
#define TAU (2 * PI)
float pow5(float x)
{
float tmp = x * x;
return (tmp * tmp) * x;
}
float wrapNoL(float NoL, float factor) {
// https://www.iro.umontreal.ca/~derek/files/jgt_wrap_final.pdf
return pow(max(1E-4, (NoL + factor) / (1 + factor)), 1 + factor);
}
#endif // __MATH_INC
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