gelMatrix.h

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/*
Gel2D Game Engine - Cross-platform 2D gaming middleware
Copyright (C) 2011 Mark D. Procarione

Gel2D is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

Gel2D is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
*/

#ifndef __GELMATRIX_H__
#define __GELMATRIX_H__

#include "gelVector.h"

namespace gel
{


        class Gel3x3Matrix
        {
                public:
                        union
                        {
                                float m[3][3];
                                struct
                                {
                                        float m11, m12, m13,
                                              m21, m22, m23,
                                              m31, m32, m33;
                                };
                        };

                public:

                        Gel3x3Matrix();


                        Gel3x3Matrix( const float matrix[16] );

                        void loadNull();

                        void loadIdentity();


                        void translate( Gel2dVec pos );


                        void rotate( float rot );


                        void rotateRad( float rot );


                        void scale( Gel2dVec scl );


                        void shear( float shx, float shy );


                        bool isIdentity() const;


                        bool isTranslation() const;


                        bool isRotation() const;


                        bool isScaling() const;


                        bool isShearing() const;


            void toOGLMatrix( float matrix[16] ) const;

                        void dump() const;

                        // Matrix operators
                        Gel3x3Matrix operator+( const Gel3x3Matrix &m ) const;
                        Gel3x3Matrix operator-( const Gel3x3Matrix &m ) const;
                        Gel3x3Matrix operator*( const Gel3x3Matrix &m ) const;
                        Gel3x3Matrix operator=( const Gel3x3Matrix &m );

                        Gel3x3Matrix operator+=( const Gel3x3Matrix &m );
                        Gel3x3Matrix operator-=( const Gel3x3Matrix &m );
                        Gel3x3Matrix operator*=( const Gel3x3Matrix &m );

                        bool operator==( const Gel3x3Matrix &m ) const;
                        bool operator!=( const Gel3x3Matrix &m ) const;

                        Gel2dVec operator*( const Gel2dVec &v ) const;
        };


        class Gel4x4Matrix
        {
                public:
                        union
                        {
                                float m[4][4];
                                float ms[16];
                                struct
                                {
                                        float m11, m12, m13, m14,
                                              m21, m22, m23, m24,
                                              m31, m32, m33, m34,
                                              m41, m42, m43, m44;
                                };
                        };

                public:

                        Gel4x4Matrix();


                        Gel4x4Matrix( const float matrix[16] );

                        void loadNull();

                        void loadIdentity();


                        void translate( Gel3dVec pos );


                        void rotateX( float rot );


                        void rotateY( float rot );


                        void rotateZ( float rot );


                        void scale( Gel3dVec scl );


                        void shear( Gel2dVec shx, Gel2dVec shy, Gel2dVec shz );


                        bool isIdentity() const;


                        bool isTranslation() const;


                        bool isRotation() const;


                        bool isScaling() const;


                        bool isShearing() const;


            void toOGLMatrix( float matrix[16] ) const;

                        void dump() const;

                        // Matrix operators
                        Gel4x4Matrix operator+( const Gel4x4Matrix &m ) const;
                        Gel4x4Matrix operator-( const Gel4x4Matrix &m ) const;
                        Gel4x4Matrix operator*( const Gel4x4Matrix &m ) const;
                        Gel4x4Matrix operator=( const Gel4x4Matrix &m );

                        Gel4x4Matrix operator+=( const Gel4x4Matrix &m );
                        Gel4x4Matrix operator-=( const Gel4x4Matrix &m );
                        Gel4x4Matrix operator*=( const Gel4x4Matrix &m );

                        bool operator==( const Gel4x4Matrix &m ) const;
                        bool operator!=( const Gel4x4Matrix &m ) const;

                        Gel3dVec operator*( const Gel3dVec &v ) const;
                };
}

#endif // __GELMATRIX_H__