src/Renderer/Point.cpp

// SwiftShader Software Renderer
//
// Copyright(c) 2005-2011 TransGaming Inc.
//
// All rights reserved. No part of this software may be copied, distributed, transmitted,
// transcribed, stored in a retrieval system, translated into any human or computer
// language by any means, or disclosed to third parties without the explicit written
// agreement of TransGaming Inc. Without such an agreement, no rights or licenses, express
// or implied, including but not limited to any patent rights, are granted to you.
//

#include "Point.hpp"

#include "Matrix.hpp"

namespace sw
{
	Point &Point::operator+=(const Vector &v)
	{
		x += v.x;
		y += v.y;
		z += v.z;

		return *this;
	}

	Point &Point::operator-=(const Vector &v)
	{
		x -= v.x;
		y -= v.y;
		z -= v.z;

		return *this;
	}

	Point operator+(const Point &P, const Vector &v)
	{
		return Point(P.x + v.x, P.y + v.y, P.z + v.z);
	}

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

	Vector operator-(const Point &P, const Point &Q)
	{
		return Vector(P.x - Q.x, P.y - Q.y, P.z - Q.z);
	}

	Point operator*(const Matrix &M, const Point &P)
	{
		return Point(M(1, 1) * P.x + M(1, 2) * P.y + M(1, 3) * P.z + M(1, 4),
		             M(2, 1) * P.x + M(2, 2) * P.y + M(2, 3) * P.z + M(2, 4),
		             M(3, 1) * P.x + M(3, 2) * P.y + M(3, 3) * P.z + M(3, 4));
	}

	Point operator*(const Point &P, const Matrix &M)
	{
		return Point(P.x * M(1, 1) + P.y * M(2, 1) + P.z * M(3, 1),
		             P.x * M(1, 2) + P.y * M(2, 2) + P.z * M(3, 2),
		             P.x * M(1, 3) + P.y * M(2, 3) + P.z * M(3, 3));
	}

	Point &operator*=(Point &P, const Matrix &M)
	{
		return P = P * M;
	}

	float Point::d(const Point &P) const
	{
		return Vector::N(*this - P);
	}

	float Point::d2(const Point &P) const
	{
		return Vector::N2(*this - P);
	}

	float Point::d(const Point &P, const Point &Q)
	{
		return Vector::N(P - Q);
	}

	float Point::d2(const Point &P, const Point &Q)
	{
		return Vector::N2(P - Q);
	}
}