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#ifndef _VECTOR_H_
#define _VECTOR_H_
#include "Vertex.h"
#include <math.h>
class Vector : public Vertex {
public:
Vector(float x0 = 0, float y0 = 0, float z0 = 0) : Vertex(x0, y0, z0) {}
Vector(const Vertex &v) : Vertex(v) {}
Vector operator+(const Vector &v) const {
return Vector(x+v.x, y+v.y, z+v.z);
}
Vector operator*(float f) const {
return Vector(x*f, y*f, z*f);
}
Vector operator/(float f) const {
return (*this)*(1/f);
}
Vector operator-() const {
return Vector(-x, -y, -z);
}
Vector cross(const Vector &v) const {
return Vector(y*v.z - z*v.y,
z*v.x - x*v.z,
x*v.y - y*v.x);
}
float dot(const Vector &v) const {
return x*v.x + y*v.y + z*v.z;
}
float length() const {
return sqrtf(x*x+y*y+z*z);
}
Vector normalize() const {
return *this/length();
}
};
static inline Vector operator-(const Vertex &v1, const Vertex &v2) {
return Vector(v1.getX()-v2.getX(), v1.getY()-v2.getY(), v1.getZ()-v2.getZ());
}
#endif /*_VECTOR_H_*/
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