FXMat2f.h

/********************************************************************************
*                                                                               *
*            S i n g l e - P r e c i s i o n   2 x 2   M a t r i x              *
*                                                                               *
*********************************************************************************
* Copyright (C) 2003,2022 by Jeroen van der Zijp.   All Rights Reserved.        *
*********************************************************************************
* This library is free software; you can redistribute it and/or modify          *
* it under the terms of the GNU Lesser General Public License as published by   *
* the Free Software Foundation; either version 3 of the License, or             *
* (at your option) any later version.                                           *
*                                                                               *
* This library 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 Lesser General Public License for more details.                           *
*                                                                               *
* You should have received a copy of the GNU Lesser General Public License      *
* along with this program.  If not, see <http://www.gnu.org/licenses/>          *
********************************************************************************/
#ifndef FXMAT2F_H
#define FXMAT2F_H

namespace FX {


class FXMat3f;


class FXAPI FXMat2f {
protected:
  FXVec2f m[2];
public:

  FXMat2f(){}

  FXMat2f(FXfloat s);

  FXMat2f(const FXMat2f& s);

  FXMat2f(const FXMat3f& s);

  FXMat2f(const FXfloat s[]);

  FXMat2f(FXfloat a,FXfloat b);

  FXMat2f(FXfloat a00,FXfloat a01,FXfloat a10,FXfloat a11);

  FXMat2f(const FXVec2f& a,const FXVec2f& b);

  FXMat2f& operator=(FXfloat s);

  FXMat2f& operator=(const FXMat2f& s);
  FXMat2f& operator=(const FXMat3f& s);

  FXMat2f& operator=(const FXfloat s[]);

  FXMat2f& set(FXfloat s);

  FXMat2f& set(const FXMat2f& s);

  FXMat2f& set(const FXMat3f& s);

  FXMat2f& set(const FXfloat s[]);

  FXMat2f& set(FXfloat a,FXfloat b);

  FXMat2f& set(FXfloat a00,FXfloat a01,FXfloat a10,FXfloat a11);

  FXMat2f& set(const FXVec2f& a,const FXVec2f& b);

  FXMat2f& operator+=(const FXMat2f& s);
  FXMat2f& operator-=(const FXMat2f& s);
  FXMat2f& operator*=(const FXMat2f& s);
  FXMat2f& operator*=(FXfloat s);
  FXMat2f& operator/=(FXfloat s);

  FXVec2f& operator[](FXint i){return m[i];}
  const FXVec2f& operator[](FXint i) const {return m[i];}

  operator FXfloat*(){return m[0];}
  operator const FXfloat*() const {return m[0];}

  FXMat2f operator-() const;

  FXMat2f& identity();

  FXbool isIdentity() const;

  FXMat2f& rot(FXfloat c,FXfloat s);
  FXMat2f& rot(FXfloat phi);

  FXMat2f& scale(FXfloat sx,FXfloat sy);
  FXMat2f& scale(FXfloat s);

  FXfloat det() const;

  FXMat2f transpose() const;

  FXMat2f invert() const;

 ~FXMat2f(){}
  };


extern FXAPI FXVec2f operator*(const FXMat2f& m,const FXVec2f& v);

extern FXAPI FXVec2f operator*(const FXVec2f& v,const FXMat2f& m);

extern FXAPI FXMat2f operator+(const FXMat2f& a,const FXMat2f& b);
extern FXAPI FXMat2f operator-(const FXMat2f& a,const FXMat2f& b);

extern FXAPI FXMat2f operator*(const FXMat2f& a,const FXMat2f& b);

extern FXAPI FXMat2f operator*(FXfloat x,const FXMat2f& a);
extern FXAPI FXMat2f operator*(const FXMat2f& a,FXfloat x);
extern FXAPI FXMat2f operator/(const FXMat2f& a,FXfloat x);
extern FXAPI FXMat2f operator/(FXfloat x,const FXMat2f& a);

extern FXAPI FXbool operator==(const FXMat2f& a,const FXMat2f& b);
extern FXAPI FXbool operator!=(const FXMat2f& a,const FXMat2f& b);
extern FXAPI FXbool operator==(const FXMat2f& a,FXfloat n);
extern FXAPI FXbool operator!=(const FXMat2f& a,FXfloat n);
extern FXAPI FXbool operator==(FXfloat n,const FXMat2f& a);
extern FXAPI FXbool operator!=(FXfloat n,const FXMat2f& a);

extern FXAPI FXMat2f orthogonalize(const FXMat2f& m);

extern FXAPI FXStream& operator<<(FXStream& store,const FXMat2f& m);

extern FXAPI FXStream& operator>>(FXStream& store,FXMat2f& m);

}

#endif