36 lines
789 B
C++
36 lines
789 B
C++
#ifndef K_MATH_MATH_H
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#define K_MATH_MATH_H
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#include "../Defines.h"
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#include "../geo/Point3.h"
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class Math {
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public:
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/** ensure val stays within [min:max] */
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template <typename Scalar> static inline Scalar clamp(const Scalar min, const Scalar max, const Scalar val) {
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if (unlikely(val < min)) {return min;}
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if (unlikely(val > max)) {return max;}
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return val;
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}
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/** get the cross-product of u and v */
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static inline Point3 cross(const Point3 u, const Point3 v) {
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float x = u.y*v.z - u.z*v.y;
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float y = u.z*v.x - u.x*v.z;
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float z = u.x*v.y - u.y*v.x;
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return Point3(x,y,z);
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}
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/** get the normal-vector for u and v */
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static inline Point3 normal(const Point3 u, const Point3 v) {
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const Point3 p = cross(u,v);
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return p/p.length();
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}
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};
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#endif // K_MATH_MATH_H
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