#ifndef K_MATH_MATH_H
#define K_MATH_MATH_H

#include "../Defines.h"
#include "../geo/Point3.h"

class Math {

public:

	/** ensure val stays within [min:max] */
	template <typename Scalar> static inline Scalar clamp(const Scalar min, const Scalar max, const Scalar val) {
		if (unlikely(val < min)) {return min;}
		if (unlikely(val > max)) {return max;}
		return val;
	}

	/** get the cross-product of u and v */
	static inline Point3 cross(const Point3 u, const Point3 v) {
		float x = u.y*v.z - u.z*v.y;
		float y = u.z*v.x - u.x*v.z;
		float z = u.x*v.y - u.y*v.x;
		return Point3(x,y,z);
	}

	/** get the normal-vector for u and v */
	static inline Point3 normal(const Point3 u, const Point3 v) {
		const Point3 p = cross(u,v);
		return p/p.length();
	}

};


#endif // K_MATH_MATH_H