// Demeter Terrain Visualization Library by Clay Fowler
// Copyright (C) 2001 Clay Fowler

/*
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 2.1 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
Library General Public License for more details.

You should have received a copy of the GNU Library General Public
License along with this library; if not, write to the
Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA  02111-1307, USA.
*/

#ifndef _MATRIX_H_
#define _MATRIX_H_

#include <Demeter/Terrain.h>

// Stripped down matrix taken mostly from David Eberly's excellent matrix class. See his book
// "3D Game Engine Design" for a complete implementation of this class.
// This class is embedded here in the sample to avoid making the sample dependent on external math libraries.
////////////////////////////////////////////////
class Matrix
{
      public:
	Matrix()
	{
		SetIdentity();
	}
	 ~Matrix()
	{
	}
	float &operator() (int i, int j);
	const float &operator() (int i, int j)const;
	Matrix operator *(const Matrix & matOther);
	Demeter::Vector operator *(const Demeter::Vector & vector);
	void SetRotateZ(float theta);
	void SetRotateX(float theta);
	void SetRotateY(float theta);
	void SetIdentity();
      private:
	float m_Elements[4][4];
};

#endif