vec2.h

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/*
**  ClanLib SDK
**  Copyright (c) 1997-2009 The ClanLib Team
**
**  This software is provided 'as-is', without any express or implied
**  warranty.  In no event will the authors be held liable for any damages
**  arising from the use of this software.
**
**  Permission is granted to anyone to use this software for any purpose,
**  including commercial applications, and to alter it and redistribute it
**  freely, subject to the following restrictions:
**
**  1. The origin of this software must not be misrepresented; you must not
**     claim that you wrote the original software. If you use this software
**     in a product, an acknowledgment in the product documentation would be
**     appreciated but is not required.
**  2. Altered source versions must be plainly marked as such, and must not be
**     misrepresented as being the original software.
**  3. This notice may not be removed or altered from any source distribution.
**
**  Note: Some of the libraries ClanLib may link to may have additional
**  requirements or restrictions.
**
**  File Author(s):
**
**    Magnus Norddahl
**    Mark Page
**    Harry Storbacka
*/


#pragma once

#include "../api_core.h"
#include "cl_math.h"
#include "vec1.h"
#include "vec3.h"
#include "vec4.h"
#include "origin.h"

template<typename Type>
class CL_Vec1;

template<typename Type>
class CL_Vec2;

template<typename Type>
class CL_Vec3;

template<typename Type>
class CL_Vec4;

template<typename Type>
class CL_Mat2;

template<typename Type>
class CL_Mat3;

template<typename Type>
class CL_Mat4;

template<typename Type>
class CL_Sizex;

template<typename Type>
class CL_Pointx;

class CL_Angle;

template<typename Type>
class CL_Vec2
{
public:
        typedef Type datatype;

        union { Type x; Type s; Type r; };
        union { Type y; Type t; Type g; };

        CL_Vec2() : x(0), y(0) { }
        CL_Vec2(const CL_Vec1<Type> &copy) { x = copy.x; y = 0;}
        CL_Vec2(const CL_Vec3<Type> &copy) { x = copy.x; y = copy.y;}
        CL_Vec2(const CL_Vec4<Type> &copy) { x = copy.x; y = copy.y;}
        CL_Vec2(const Type &p1, const Type &p2 = 0) : x(p1), y(p2) { }
        CL_Vec2(const CL_Pointx<int> &point);
        CL_Vec2(const CL_Pointx<float> &point);
        CL_Vec2(const CL_Pointx<double> &point);

        CL_Vec2(const CL_Vec2<double> &copy);
        CL_Vec2(const CL_Vec2<float> &copy);
        CL_Vec2(const CL_Vec2<int> &copy);

        static CL_Vec2<Type> normalize(const CL_Vec2<Type>& vector);

        static Type dot(const CL_Vec2<Type>& vector_1, const CL_Vec2<Type>& vector_2) { return vector_1.x*vector_2.x + vector_1.y*vector_2.y; }

        static CL_Vec2<Type> round(const CL_Vec2<Type>& vector);

        static CL_Vec2<Type> rotate(const CL_Vec2<Type>& vector, const CL_Vec2<Type>& hotspot, const CL_Angle &angle);

        static CL_Pointx<Type> calc_origin(CL_Origin origin, const CL_Sizex<Type> &size);


public:

        Type length() const;

        CL_Vec2<Type> &normalize();

        Type dot(const CL_Vec2<Type>& vector) const {return x*vector.x + y*vector.y;}

        CL_Angle angle(const CL_Vec2<Type>& vector) const;

        Type distance(const CL_Vec2<Type>& vector) const;

        CL_Vec2<Type> &round();

        CL_Vec2<Type> &rotate(const CL_Vec2<Type>& hotspot, const CL_Angle &angle);

        Type round_value(float value) const;


public:
        const Type &operator[](unsigned int i) const { return ((Type *) this)[i]; }
        Type &operator[](unsigned int i) { return ((Type *) this)[i]; }
        operator Type *() { return (Type *) this; }
        operator Type * const() const { return (Type * const) this; }

        void operator += (const CL_Vec2<Type>& vector) { x+= vector.x; y+= vector.y; }

        void operator += ( Type value) { x+= value; y+= value; }

        CL_Vec2<Type> operator + (const CL_Vec2<Type>& vector) const {return CL_Vec2<Type>(vector.x + x, vector.y + y);}

        CL_Vec2<Type> operator + (Type value) const {return CL_Vec2<Type>(value + x, value + y);}

        void operator -= (const CL_Vec2<Type>& vector) { x-= vector.x; y-= vector.y; }

        void operator -= ( Type value) { x-= value; y-= value; }

        CL_Vec2<Type> operator - (const CL_Vec2<Type>& vector) const {return CL_Vec2<Type>(x - vector.x, y - vector.y);}

        CL_Vec2<Type> operator - (Type value) const {return CL_Vec2<Type>(x - value, y - value);}

        CL_Vec2<Type> operator - () const {return CL_Vec2<Type>(-x , -y);}

        void operator *= (const CL_Vec2<Type>& vector) { x*= vector.x; y*= vector.y; }

        void operator *= ( Type value) { x*= value; y*= value; }

        CL_Vec2<Type> operator * (const CL_Vec2<Type>& vector) const {return CL_Vec2<Type>(vector.x * x, vector.y * y);}

        CL_Vec2<Type> operator * (Type value) const {return CL_Vec2<Type>(value * x, value * y);}

        void operator /= (const CL_Vec2<Type>& vector) { x/= vector.x; y/= vector.y; }

        void operator /= ( Type value) { x/= value; y/= value; }

        CL_Vec2<Type> operator / (const CL_Vec2<Type>& vector) const {return CL_Vec2<Type>(x / vector.x, y / vector.y);}

        CL_Vec2<Type> operator / (Type value) const {return CL_Vec2<Type>(x / value, y / value);}

        CL_Vec2<Type> &operator = (const CL_Vec2<Type>& vector) { x = vector.x; y = vector.y; return *this; }

        bool operator == (const CL_Vec2<Type>& vector) const {return ((x == vector.x) && (y == vector.y));}

        bool operator != (const CL_Vec2<Type>& vector) const {return ((x != vector.x) || (y != vector.y));}
};

template<typename Type>
CL_Vec2<Type> operator * (const CL_Vec2<Type>& v, const CL_Mat2<Type>& matrix)
{
        return CL_Vec2<Type>(
                matrix[0*2+0]*v.x + matrix[0*2+1]*v.y,
                matrix[1*2+0]*v.x + matrix[1*2+1]*v.y);
}

template<typename Type>
CL_Vec2<Type> operator * (const CL_Mat2<Type>& matrix, const CL_Vec2<Type>& v)
{
        return CL_Vec2<Type>(
                matrix[0*2+0]*v.x + matrix[1*2+0]*v.y,
                matrix[0*2+1]*v.x + matrix[1*2+1]*v.y);
}


template<>
inline CL_Vec2<unsigned char>::CL_Vec2(const CL_Vec2<float> &copy) { x = (unsigned char) floor(copy.x +0.5f); y = (unsigned char) floor(copy.y + 0.5f); }

template<>
inline CL_Vec2<unsigned char>::CL_Vec2(const CL_Vec2<double> &copy) { x = (unsigned char) floor(copy.x+0.5); y = (unsigned char) floor(copy.y+0.5); }

template<>
inline CL_Vec2<unsigned char>::CL_Vec2(const CL_Vec2<int> &copy) { x = (unsigned char) copy.x; y = (unsigned char) copy.y; }

template<>
inline CL_Vec2<char>::CL_Vec2(const CL_Vec2<float> &copy) { x = (char) floor(copy.x +0.5f); y = (char) floor(copy.y + 0.5f); }

template<>
inline CL_Vec2<char>::CL_Vec2(const CL_Vec2<double> &copy) { x = (char) floor(copy.x+0.5); y = (char) floor(copy.y+0.5); }

template<>
inline CL_Vec2<char>::CL_Vec2(const CL_Vec2<int> &copy) { x = (char) copy.x; y = (char) copy.y; }

template<>
inline CL_Vec2<unsigned short>::CL_Vec2(const CL_Vec2<float> &copy) { x = (unsigned short) floor(copy.x +0.5f); y = (unsigned short) floor(copy.y + 0.5f); }

template<>
inline CL_Vec2<unsigned short>::CL_Vec2(const CL_Vec2<double> &copy) { x = (unsigned short) floor(copy.x+0.5); y = (unsigned short) floor(copy.y+0.5); }

template<>
inline CL_Vec2<unsigned short>::CL_Vec2(const CL_Vec2<int> &copy) { x = (unsigned short) copy.x; y = (unsigned short) copy.y; }

template<>
inline CL_Vec2<short>::CL_Vec2(const CL_Vec2<float> &copy) { x = (short) floor(copy.x +0.5f); y = (short) floor(copy.y + 0.5f); }

template<>
inline CL_Vec2<short>::CL_Vec2(const CL_Vec2<double> &copy) { x = (short) floor(copy.x+0.5); y = (short) floor(copy.y+0.5); }

template<>
inline CL_Vec2<short>::CL_Vec2(const CL_Vec2<int> &copy) { x = (short) copy.x; y = (short) copy.y; }

template<>
inline CL_Vec2<int>::CL_Vec2(const CL_Vec2<float> &copy) { x = (int) floor(copy.x +0.5f); y = (int) floor(copy.y + 0.5f); }

template<>
inline CL_Vec2<int>::CL_Vec2(const CL_Vec2<double> &copy) { x = (int) floor(copy.x+0.5); y = (int) floor(copy.y+0.5); }

template<>
inline CL_Vec2<int>::CL_Vec2(const CL_Vec2<int> &copy) { x = (int) copy.x; y = (int) copy.y; }

template<>
inline CL_Vec2<unsigned int>::CL_Vec2(const CL_Vec2<float> &copy) { x = (unsigned int) floor(copy.x +0.5f); y = (unsigned int) floor(copy.y + 0.5f); }

template<>
inline CL_Vec2<unsigned int>::CL_Vec2(const CL_Vec2<double> &copy) { x = (unsigned int) floor(copy.x+0.5); y = (unsigned int) floor(copy.y+0.5); }

template<>
inline CL_Vec2<unsigned int>::CL_Vec2(const CL_Vec2<int> &copy) { x = (unsigned int) copy.x; y = (unsigned int) copy.y; }

template<>
inline CL_Vec2<float>::CL_Vec2(const CL_Vec2<float> &copy) { x = (float) copy.x; y = (float) copy.y; }

template<>
inline CL_Vec2<float>::CL_Vec2(const CL_Vec2<double> &copy) { x = (float) copy.x; y = (float) copy.y; }

template<>
inline CL_Vec2<float>::CL_Vec2(const CL_Vec2<int> &copy) { x = (float) copy.x; y = (float) copy.y; }

template<>
inline CL_Vec2<double>::CL_Vec2(const CL_Vec2<float> &copy) { x = (double) copy.x; y = (double) copy.y; }

template<>
inline CL_Vec2<double>::CL_Vec2(const CL_Vec2<double> &copy) { x = (double) copy.x; y = (double) copy.y; }

template<>
inline CL_Vec2<double>::CL_Vec2(const CL_Vec2<int> &copy) { x = (double) copy.x; y = (double) copy.y; }


typedef CL_Vec2<unsigned char> CL_Vec2ub;
typedef CL_Vec2<char> CL_Vec2b;
typedef CL_Vec2<unsigned short> CL_Vec2us;
typedef CL_Vec2<short> CL_Vec2s;
typedef CL_Vec2<unsigned int> CL_Vec2ui;
typedef CL_Vec2<int> CL_Vec2i;
typedef CL_Vec2<float> CL_Vec2f;
typedef CL_Vec2<double> CL_Vec2d;

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