dolphin/Source/Core/VideoBackends/Software/Vec3.h

// Copyright 2010 Dolphin Emulator Project
// Licensed under GPLv2+
// Refer to the license.txt file included.

#pragma once

#include <cmath>
#include <cstdlib>

#include "Common/ChunkFile.h"

class Vec3
{
public:
	float x, y, z;

	Vec3()
	{
	}

	explicit Vec3(float f)
	{
		x = y = z = f;
	}

	explicit Vec3(const float *f)
	{
		x = f[0];
		y = f[1];
		z = f[2];
	}

	Vec3(const float _x, const float _y, const float _z)
	{
		x = _x;
		y = _y;
		z = _z;
	}

	void set(const float _x, const float _y, const float _z)
	{
		x = _x;
		y = _y;
		z = _z;
	}

	Vec3 operator+(const Vec3 &other) const
	{
		return Vec3(x + other.x, y + other.y, z + other.z);
	}

	void operator+=(const Vec3 &other)
	{
		x += other.x;
		y += other.y;
		z += other.z;
	}

	Vec3 operator-(const Vec3 &v) const
	{
		return Vec3(x - v.x, y - v.y, z - v.z);
	}

	void operator-=(const Vec3 &other)
	{
		x -= other.x;
		y -= other.y;
		z -= other.z;
	}

	Vec3 operator-() const
	{
		return Vec3(-x, -y, -z);
	}

	Vec3 operator*(const float f) const
	{
		return Vec3(x * f, y * f, z * f);
	}

	Vec3 operator/(const float f) const
	{
		float invf = (1.0f / f);
		return Vec3(x * invf, y * invf, z * invf);
	}

	void operator/=(const float f)
	{
		*this = *this / f;
	}

	float operator*(const Vec3 &other) const
	{
		return (x * other.x) +
		       (y * other.y) +
		       (z * other.z);
	}

	void operator*=(const float f)
	{
		*this = *this * f;
	}

	Vec3 ScaledBy(const Vec3 &other) const
	{
		return Vec3(x * other.x, y * other.y, z * other.z);
	}

	Vec3 operator%(const Vec3 &v) const
	{
		return Vec3((y * v.z) - (z * v.y),
		            (z * v.x) - (x * v.z),
		            (x * v.y) - (y * v.x));
	}

	float Length2() const
	{
		return (x * x) + (y * y) + (z * z);
	}

	float Length() const
	{
		return sqrtf(Length2());
	}

	float Distance2To(Vec3 &other)
	{
		return (other - (*this)).Length2();
	}

	Vec3 Normalized() const
	{
		return (*this) / Length();
	}

	void Normalize()
	{
		(*this) /= Length();
	}

	float &operator[](int i)
	{
		return *((&x) + i);
	}

	float operator[](const int i) const
	{
		return *((&x) + i);
	}

	bool operator==(const Vec3 &other) const
	{
		return x == other.x && y == other.y && z == other.z;
	}

	void SetZero()
	{
		x = 0.0f;
		y = 0.0f;
		z = 0.0f;
	}
};