raytracing/Vector3.cpp

#include "Vector3.h"
#include <math.h>
#include "util.h"

Vector3 Vector3::operator+(const Vector3 & v) const
{
	return Vector3(x+v.x, y+v.y, z+v.z);
}

Vector3 Vector3::operator-(const Vector3 & v) const
{
	return Vector3(x - v.x, y - v.y, z - v.z);
}

Vector3 Vector3::operator*(const Vector3 & v) const
{
	return Vector3(x*v.x, y*v.y, z*v.z);
}

void Vector3::operator*=(float scale)
{
	x *= scale;
	y *= scale;
	z *= scale;
}

Vector3 Vector3::operator/(float scale) const
{
	return Vector3(x/scale, y/scale, z/scale);
}

void Vector3::operator/=(float scale)
{
	x /= scale;
	y /= scale;
	z /= scale;
}

void Vector3::operator=(const Vector3 & v)
{
	x = v.x;
	y = v.y;
	z = v.z;
}

void Vector3::Normalize()
{
	float magnitude = Magnitude();
	x /= magnitude;
	y /= magnitude;
	z /= magnitude;
}

float Vector3::Magnitude()
{
	return sqrtf(x*x + y*y + z*z);
}

Vector3 operator*(float f, const Vector3 & v)
{
	return Vector3(f*v.x, f*v.y, f*v.z);
}

float Dot(const Vector3 & l, const Vector3 & r)
{
	return l.x * r.x + l.y * r.y + l.z * r.z;
}

Vector3 Cross(const Vector3 & l, const Vector3 & r)
{
	return Vector3(l.y*r.z - l.z*r.y, l.z*r.x - l.x*r.z, l.x*r.y - l.y*r.x);
}

Vector3 Reflect(const Vector3 & v, const Vector3 & n)
{
	return v - 2.0f * (Dot(v, n) * n);
}

Vector3 UnitRandomVector3InSphere()
{
	Vector3 random_vector(srandf(), srandf(), srandf());
	random_vector.Normalize();
	return random_vector;
}