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ps/trunk/source/maths/MathUtil.h
| Show All 16 Lines | |||||
| #ifndef INCLUDED_MATHUTIL | #ifndef INCLUDED_MATHUTIL | ||||
| #define INCLUDED_MATHUTIL | #define INCLUDED_MATHUTIL | ||||
| #define DEGTORAD(a) ((a) * ((float)M_PI/180.0f)) | #define DEGTORAD(a) ((a) * ((float)M_PI/180.0f)) | ||||
| #define RADTODEG(a) ((a) * (180.0f/(float)M_PI)) | #define RADTODEG(a) ((a) * (180.0f/(float)M_PI)) | ||||
| #define SQR(x) ((x) * (x)) | #define SQR(x) ((x) * (x)) | ||||
| template <typename T> | template<typename T> | ||||
| inline T Interpolate(const T& a, const T& b, float t) | inline T Interpolate(const T& a, const T& b, float t) | ||||
| { | { | ||||
| return a + (b - a) * t; | return a + (b - a) * t; | ||||
| } | } | ||||
| template <typename T> | template<typename T> | ||||
| inline T Clamp(T value, T min, T max) | inline T Clamp(T value, T min, T max) | ||||
| { | { | ||||
| if (value <= min) | if (value <= min) | ||||
| return min; | return min; | ||||
| else if (value >= max) | else if (value >= max) | ||||
| return max; | return max; | ||||
| return value; | return value; | ||||
| } | } | ||||
| template<typename T> | |||||
| inline T SmoothStep(T edge0, T edge1, T value) | |||||
| { | |||||
| value = Clamp<T>((value - edge0) / (edge1 - edge0), 0, 1); | |||||
| return value * value * (3 - 2 * value); | |||||
| } | |||||
| inline float sgn(float a) | inline float sgn(float a) | ||||
| { | { | ||||
| if (a > 0.0f) | if (a > 0.0f) | ||||
| return 1.0f; | return 1.0f; | ||||
| if (a < 0.0f) | if (a < 0.0f) | ||||
| return -1.0f; | return -1.0f; | ||||
| return 0.0f; | return 0.0f; | ||||
| } | } | ||||
| #endif // INCLUDED_MATHUTIL | #endif // INCLUDED_MATHUTIL | ||||
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