/****************************************************************************
* VCGLib                                                            o o     *
* Visual and Computer Graphics Library                            o     o   *
*                                                                _   O  _   *
* Copyright(C) 2004                                                \/)\/    *
* Visual Computing Lab                                            /\/|      *
* ISTI - Italian National Research Council                           |      *
*                                                                    \      *
* All rights reserved.                                                      *
*                                                                           *
* This program 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 2 of the License, or         *
* (at your option) any later version.                                       *
*                                                                           *
* This program 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 (http://www.gnu.org/licenses/gpl.txt)          *
* for more details.                                                         *
*                                                                           *
****************************************************************************/
/****************************************************************************
  History

$Log: not supported by cvs2svn $
Revision 1.4  2004/05/10 13:26:53  cignoni
missing ending newline

Revision 1.3  2004/03/11 08:54:12  cignoni
Written some documentation and added to the space module

Revision 1.2  2004/03/10 21:38:40  cignoni
Written some documentation and added to the space module

Revision 1.1  2004/02/13 00:44:53  cignoni
First commit...


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

#ifndef __VCGLIB_TCOORD2__
#define __VCGLIB_TCOORD2__

#include <vcg/space/point2.h>

namespace vcg {
/** \addtogroup space */
/*@{*/

/**
	Templated class for a set of 2D texture coord. It for each is templated over two parameters: 
  the type of the tex coord and the number of texcoord to be stored. This class is intended to be used when many textures
  id are shared over the same surface, so for each coord the id of the texture is stored. If no id is needed see the vcg::TCoord2Simple class.
*/

template<class T = float, int N = 1>
class TCoord2  
{
private:
	Point2<T> _t[N];
	short     _n[N];
public:
	
	inline T & u() { return _t[0][0]; }
	inline T & v() { return _t[0][1]; }
	inline const T & u() const { return _t[0][0]; }
	inline const T & v() const { return _t[0][1]; }
	inline T & u(const int i) { return _t[i][0]; }
	inline T & v(const int i) { return _t[i][1]; }
	inline const T & u(const int i) const { return _t[i][0]; }
	inline const T & v(const int i) const { return _t[i][1]; }

	inline short     & n() { return _n[0]; }
	inline const short n() const { return _n[0]; }

	inline short     & n(const int i) { return _n[i]; }
	inline const short n(const int i) const { return _n[i]; }
	
	inline Point2<T> & t(const int i) { return _t[i]; }
	inline Point2<T> t(const int i) const { return _t[i]; }

	inline Point2<T> & t() { return _t[0]; }
	inline Point2<T> t() const { return _t[0]; }
	
	inline bool operator == ( TCoord2 const & p ) const
		{
		 for(int i=0;i<N;++i)
			 if(p._t[i] != _t[i] || p._n[i] != _n[i]) return false;
		 return true;
		}

  inline bool operator != ( TCoord2 const & p ) const
		{
		 for(int i=0;i<N;++i)
			 if(p._t[i] != _t[i] || p._n[i] != _n[i]) return true;
		 return false;
		}

	inline bool operator < ( TCoord2 const & p ) const
		{
		 for(int i=0;i<N;++i)
			 if(p._t[i] != _t[i]) return p._t[i] < _t[i];
		 return false;
		}

	enum { n_coords=N};
};

/**
	Templated class for a single 2D texture coord.
*/
template<class T = float>
class TCoord2Simple
{
private:
	Point2<T> _t;

	inline short & static_n() const
	{
		static short _n = 0;
		return _n;
	}

public:

	inline T & u() { return _t[0]; }
	inline T & v() { return _t[1]; }
	inline const T & u() const { return _t[0]; }
	inline const T & v() const { return _t[1]; }
	inline T & u(const int i) { assert(i==0); return _t[0]; }
	inline T & v(const int i) { assert(i==0); return _t[1]; }
	inline const T & u(const int i) const { assert(i==0); return _t[0]; }
	inline const T & v(const int i) const { assert(i==0); return _t[1]; }

	inline bool operator == ( TCoord2Simple const & p ) const
		{
			return _t==p._t;
		}

	inline Point2<T> & t(const int i) { assert(i==0); return _t; }
	inline Point2<T> t(const int i) const { assert(i==0); return _t; }

	inline Point2<T> & t() { return _t; }
	inline Point2<T> t() const { return _t; }

	inline short & n() { assert(static_n()==0); return static_n(); }
	inline short   n() const { assert(static_n()==0); return 0; }

	inline short & n(const int i) { assert(i==0); return static_n(); }
	inline short   n(const int i) const { assert(i==0); return 0; }

	enum { n_coords=1};

};

/*@}*/

}

#endif