nuclear@3: #ifndef VMATH_H_
nuclear@3: #define VMATH_H_
nuclear@3: 
nuclear@4: #include <math.h>
nuclear@4: 
nuclear@3: class Vector2 {
nuclear@3: public:
nuclear@3: 	float x, y;
nuclear@3: 
nuclear@3: 	Vector2() : x(0), y(0) {}
nuclear@3: 	Vector2(float xa, float ya) : x(xa), y(ya) {}
nuclear@3: 
nuclear@3: 	float &operator [](int idx) { return (&x)[idx]; }
nuclear@3: 	const float &operator [](int idx) const { return (&x)[idx]; }
nuclear@3: };
nuclear@3: 
nuclear@3: class Vector3 {
nuclear@3: public:
nuclear@3: 	float x, y, z;
nuclear@3: 
nuclear@3: 	Vector3() : x(0), y(0), z(0) {}
nuclear@3: 	Vector3(float xa, float ya, float za) : x(xa), y(ya), z(za) {}
nuclear@3: 
nuclear@3: 	float &operator [](int idx) { return (&x)[idx]; }
nuclear@3: 	const float &operator [](int idx) const { return (&x)[idx]; }
nuclear@3: };
nuclear@3: 
nuclear@4: inline Vector3 operator +(const Vector3 &a, const Vector3 &b)
nuclear@4: {
nuclear@4: 	return Vector3(a.x + b.x, a.y + b.y, a.z + b.z);
nuclear@4: }
nuclear@4: 
nuclear@4: inline Vector3 operator -(const Vector3 &a, const Vector3 &b)
nuclear@4: {
nuclear@4: 	return Vector3(a.x - b.x, a.y - b.y, a.z - b.z);
nuclear@4: }
nuclear@4: 
nuclear@4: inline Vector3 operator *(const Vector3 &a, float s)
nuclear@4: {
nuclear@4: 	return Vector3(a.x * s, a.y * s, a.z * s);
nuclear@4: }
nuclear@4: 
nuclear@4: inline float dot(const Vector3 &a, const Vector3 &b)
nuclear@4: {
nuclear@4: 	return a.x * b.x + a.y * b.y + a.z * b.z;
nuclear@4: }
nuclear@4: 
nuclear@4: inline float length(const Vector3 &v)
nuclear@4: {
nuclear@4: 	return sqrt(dot(v, v));
nuclear@4: }
nuclear@4: 
nuclear@4: inline Vector3 normalize(const Vector3 &v)
nuclear@4: {
nuclear@4: 	float len = length(v);
nuclear@4: 	if(len == 0.0) {
nuclear@4: 		return v;
nuclear@4: 	}
nuclear@4: 	return Vector3(v.x / len, v.y / len, v.z / len);
nuclear@4: }
nuclear@4: 
nuclear@3: class Vector4 {
nuclear@3: public:
nuclear@3: 	float x, y, z, w;
nuclear@3: 
nuclear@3: 	Vector4() : x(0), y(0), z(0), w(0) {}
nuclear@3: 	Vector4(float xa, float ya, float za, float wa) : x(xa), y(ya), z(za), w(wa) {}
nuclear@3: 
nuclear@3: 	float &operator [](int idx) { return (&x)[idx]; }
nuclear@3: 	const float &operator [](int idx) const {  return (&x)[idx]; }
nuclear@3: };
nuclear@3: 
nuclear@4: class Ray {
nuclear@4: public:
nuclear@4: 	Vector3 origin, dir;
nuclear@4: 
nuclear@4: 	Ray() : origin(0, 0, 0), dir(0, 0, 1) {}
nuclear@4: 	Ray(const Vector3 &o, const Vector3 &d) : origin(o), dir(d) {}
nuclear@4: };
nuclear@4: 
nuclear@3: #endif	// VMATH_H_