mat3.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 "mat2.h"
#include "mat4.h"
#include "../IOData/datatypes.h"

template<typename Type>
class CL_Mat2;

template<typename Type>
class CL_Mat3;

template<typename Type>
class CL_Mat4;

class CL_Angle;

template<typename Type>
class CL_Mat3
{

public:
        CL_Mat3() { }

        CL_Mat3(const CL_Mat3<Type> &copy)
        {
                for (int i=0; i<9; i++)
                        matrix[i] = copy.matrix[i];
        }

        CL_Mat3(const CL_Mat2<Type> &copy);

        CL_Mat3(const CL_Mat4<Type> &copy);

        CL_Mat3(const float *init_matrix)
        {
                for (int i=0; i<9; i++)
                        matrix[i] = (Type) init_matrix[i];
        }

        CL_Mat3(Type m00, Type m01, Type m02, Type m10, Type m11, Type m12, Type m20, Type m21, Type m22)
        {
                matrix[0 * 3 + 0] = m00; matrix[0 * 3 + 1] = m01; matrix[0 * 3 + 2] = m02;
                matrix[1 * 3 + 0] = m10; matrix[1 * 3 + 1] = m11; matrix[1 * 3 + 2] = m12;
                matrix[2 * 3 + 0] = m20; matrix[2 * 3 + 1] = m21; matrix[2 * 3 + 2] = m22;
        }

        CL_Mat3(const double *init_matrix)
        {
                for (int i=0; i<9; i++)
                        matrix[i] = (Type) init_matrix[i];
        }

        CL_Mat3(const cl_int64 *init_matrix)
        {
                for (int i=0; i<9; i++)
                        matrix[i] = (Type) init_matrix[i];
        }

        CL_Mat3(const cl_int32 *init_matrix)
        {
                for (int i=0; i<9; i++)
                        matrix[i] = (Type) init_matrix[i];
        }

        CL_Mat3(const cl_int16 *init_matrix)
        {
                for (int i=0; i<9; i++)
                        matrix[i] = (Type) init_matrix[i];
        }

        CL_Mat3(const cl_int8 *init_matrix)
        {
                for (int i=0; i<9; i++)
                        matrix[i] = (Type) init_matrix[i];
        }

        static CL_Mat3<Type> null();

        static CL_Mat3<Type> identity();

        static CL_Mat3<Type> rotate(const CL_Angle &angle, Type x, Type y, Type z, bool normalize = true);

        static CL_Mat3<Type> multiply(const CL_Mat3<Type> &matrix_1, const CL_Mat3<Type> &matrix_2);

        static CL_Mat3<Type> add(const CL_Mat3<Type> &matrix_1, const CL_Mat3<Type> &matrix_2);

        static CL_Mat3<Type> subtract(const CL_Mat3<Type> &matrix_1, const CL_Mat3<Type> &matrix_2);

        static CL_Mat3<Type> adjoint(const CL_Mat3<Type> &matrix);

        static CL_Mat3<Type> inverse(const CL_Mat3<Type> &matrix);


public:
        Type matrix[9];


public:
        CL_Mat3<Type> &multiply(const CL_Mat3<Type> &mult);

        CL_Mat3<Type> &add(const CL_Mat3<Type> &add_matrix);

        CL_Mat3<Type> &subtract(const CL_Mat3<Type> &sub_matrix);

        double det() const;

        CL_Mat3<Type> &adjoint();

        CL_Mat3<Type> &inverse();


public:
        operator Type const*() const { return matrix; }

        operator Type *() { return matrix; }

        Type &operator[](int i) { return matrix[i]; }

        const Type &operator[](int i) const { return matrix[i]; }

        Type &operator[](unsigned int i) { return matrix[i]; }

        const Type &operator[](unsigned int i) const { return matrix[i]; }

        CL_Mat3<Type> &operator =(const CL_Mat3<Type> &copy) {memcpy(matrix, copy.matrix, sizeof(matrix)); return *this; }

        CL_Mat3<Type> &operator =(const CL_Mat4<Type> &copy);

        CL_Mat3<Type> &operator =(const CL_Mat2<Type> &copy);

        CL_Mat3<Type> operator *(const CL_Mat4<Type> &mult) const { CL_Mat3<Type> result = mult; result.multiply(*this); return result; }

        CL_Mat3<Type> operator +(const CL_Mat4<Type> &add_matrix) const { CL_Mat3<Type> result = add_matrix; result.add(*this); return result; }

        CL_Mat3<Type> operator -(const CL_Mat4<Type> &sub_matrix) const { CL_Mat3<Type> result = sub_matrix; result.subtract(*this); return result; }

        bool operator==(const CL_Mat3<Type> &other)
        {
                for (int i=0; i<9; i++)
                        if (matrix[i] != other.matrix[i]) return false;
                return true;
        }

        bool operator!=(const CL_Mat3<Type> &other) { return !((*this) == other); }


private:
};

typedef CL_Mat3<int> CL_Mat3i;
typedef CL_Mat3<float> CL_Mat3f;
typedef CL_Mat3<double> CL_Mat3d;

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