44 lines
723 B
C++
44 lines
723 B
C++
#ifndef MATH_UTIL_H
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#define MATH_UTIL_H
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#ifndef PI
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#define PI 3.14159265358979323846f
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#endif
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#define DEGTORAD(a) ((a) * (PI/180.0f))
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#define RADTODEG(a) ((a) * (180.0f/PI))
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#define SQR(x) ((x) * (x))
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template <typename T>
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T Interpolate(T& a, T& b, float l)
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{
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return a + (b - a) * l;
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}
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template <typename T>
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inline T clamp(T value, T min, T max)
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{
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if (value <= min) return min;
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else if (value >= max) return max;
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else return value;
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}
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static inline int RoundUpToPowerOf2(int x)
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{
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if ((x & (x-1)) == 0)
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return x;
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int d = x;
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while (d & (d-1))
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d &= (d-1);
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return d << 1;
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}
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inline float sgn(float a)
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{
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if (a > 0.0f) return 1.0f;
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if (a < 0.0f) return -1.0f;
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return 0.0f;
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}
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#endif
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