/**********************************************************************

 *<

	FILE: matrix2.h



	DESCRIPTION: Class definitions for Matrix2



	CREATED BY: Dan Silva



	HISTORY:



 *>	Copyright (c) 1994, All Rights Reserved.

 **********************************************************************/



#ifndef __MATRIX2__ 



#define __MATRIX2_



#include "point2.h"



class Matrix2 {

public:

	float m[3][2];



	// Constructors

	Matrix2(){}	 // NO INITIALIZATION done in this constructor!! (can use Zero or IdentityMatrix)

	DllExport Matrix2(float (*fp)[2]); 

	

	// Assignment operators

	DllExport Matrix2& operator-=( const Matrix2& M);

	DllExport Matrix2& operator+=( const Matrix2& M); 

	DllExport Matrix2& operator*=( const Matrix2& M);  	// Matrix multiplication



 	// Conversion function

	operator float*() { return(&m[0][0]); }



	// Initialize matrix

	DllExport void IdentityMatrix(); 	// Set to the Identity Matrix

	DllExport void Zero();		// Set all elements to 0



	// Apply Incremental transformations to this matrix

	DllExport void Translate(const Point2& p);

	DllExport void Rotate(float angle);  

	DllExport void Scale(const Point2& s);

		

	// Binary operators		

	DllExport Matrix2 Matrix2::operator*(const Matrix2& B) const;	

	DllExport Matrix2 Matrix2::operator+(const Matrix2& B) const;

	DllExport Matrix2 Matrix2::operator-(const Matrix2& B) const;

	};



// Build new matrices for transformations

Matrix2 DllExport RotateMatrix(float angle);   

Matrix2 DllExport TransMatrix(const Point2& p);

Matrix2 DllExport ScaleMatrix(const Point2& s);

 

Matrix2 DllExport Inverse(const Matrix2& M);



// Transform point with matrix:

Point2 DllExport operator*(const Matrix2& A, const Point2& V);

Point2 DllExport operator*( const Point2& V, const Matrix2& A);

Point2 DllExport VectorTransform(const Matrix2& M, const Point2& V);



// Printout

ostream DllExport &operator<< (ostream& s, const Matrix2& A); 



#endif