assimp/include/aiVector2D.h

/*
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Open Asset Import Library (ASSIMP)
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Copyright (c) 2006-2008, ASSIMP Development Team

All rights reserved.

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  following disclaimer.

* Redistributions in binary form must reproduce the above
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* Neither the name of the ASSIMP team, nor the names of its
  contributors may be used to endorse or promote products
  derived from this software without specific prior
  written permission of the ASSIMP Development Team.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 
OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 
LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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*/
/** @file 2D vector structure, including operators when compiling in C++ */
#ifndef AI_VECTOR2D_H_INC
#define AI_VECTOR2D_H_INC

#include <math.h>

#ifdef __cplusplus
extern "C" {
#endif

#include "./Compiler/pushpack1.h"

// ---------------------------------------------------------------------------
/** Represents a two-dimensional vector. */
struct aiVector2D
{
#ifdef __cplusplus
	aiVector2D () : x(0.0f), y(0.0f) {}
	aiVector2D (float _x, float _y) : x(_x), y(_y) {}
	aiVector2D (float _xyz) : x(_xyz), y(_xyz) {}
	aiVector2D (const aiVector2D& o) : x(o.x), y(o.y) {}

	void Set( float pX, float pY) { x = pX; y = pY;}
	float SquareLength() const { return x*x + y*y; }
	float Length() const { return sqrt( SquareLength()); }
	aiVector2D& Normalize() { *this /= Length(); return *this; }
	const aiVector2D& operator += (const aiVector2D& o) { x += o.x; y += o.y;  return *this; }
	const aiVector2D& operator -= (const aiVector2D& o) { x -= o.x; y -= o.y;  return *this; }
	const aiVector2D& operator *= (float f) { x *= f; y *= f;  return *this; }
	const aiVector2D& operator /= (float f) { x /= f; y /= f;  return *this; }

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

	inline bool operator== (const aiVector2D& other) const
		{return x == other.x && y == other.y;}

	inline bool operator!= (const aiVector2D& other) const
		{return x != other.x || y != other.y;}

	inline aiVector2D& operator= (float f)
		{x = y = f;return *this;}

	const aiVector2D SymMul(const aiVector2D& o)
		{return aiVector2D(x*o.x,y*o.y);}

#endif // __cplusplus

	float x, y;	
} PACK_STRUCT;

#include "./Compiler/poppack1.h"

#ifdef __cplusplus
} // end extern "C"

// symmetric addition
inline aiVector2D operator + (const aiVector2D& v1, const aiVector2D& v2)
{
	return aiVector2D( v1.x + v2.x, v1.y + v2.y);
}

// symmetric subtraction
inline aiVector2D operator - (const aiVector2D& v1, const aiVector2D& v2)
{
	return aiVector2D( v1.x - v2.x, v1.y - v2.y);
}

// scalar product
inline float operator * (const aiVector2D& v1, const aiVector2D& v2)
{
	return v1.x*v2.x + v1.y*v2.y;
}

// scalar multiplication
inline aiVector2D operator * ( float f, const aiVector2D& v)
{
	return aiVector2D( f*v.x, f*v.y);
}

// and the other way around
inline aiVector2D operator * ( const aiVector2D& v, float f)
{
	return aiVector2D( f*v.x, f*v.y);
}

// scalar division
inline aiVector2D operator / ( const aiVector2D& v, float f)
{
	
	return v * (1/f);
}

// vector division
inline aiVector2D operator / ( const aiVector2D& v, const aiVector2D& v2)
{
	return aiVector2D(v.x / v2.x,v.y / v2.y);
}

// vector inversion
inline aiVector2D operator - ( const aiVector2D& v)
{
	return aiVector2D( -v.x, -v.y);
}

#endif // __cplusplus

#endif // AI_VECTOR2D_H_INC