/****************************************************************************
* VCGLib                                                            o o     *
* Visual and Computer Graphics Library                            o     o   *
*                                                                _   O  _   *
* Copyright(C) 2004                                                \/)\/    *
* Visual Computing Lab                                            /\/|      *
* ISTI - Italian National Research Council                           |      *
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* All rights reserved.                                                      *
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* (at your option) any later version.                                       *
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* 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.                                                         *
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Revision 1.13  2005/04/14 17:23:08  ponchio
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****************************************************************************/

#ifndef __VCGLIB_UGRID_OBJ
#define __VCGLIB_UGRID_OBJ

#include <vector>
#include <algorithm>
#include <stdio.h>

#include <vcg/space/box3.h>
#include <vcg/space/line3.h>
#include <vcg/space/index/grid_util.h>
namespace vcg {
/** Static Uniform Grid
A simple Spatial grid of object. 
Kept in the most trivial way. Every cell is allocated 
and contains one istance of the template class.
*/

template < typename class ObjType, class FLT=float  >
class GridStaticObj : public BasicGrid<FLT>
{
 public:

		/// La matriciona della griglia
	  ObjType *grid;

	int size() const { return siz[0]*siz[1]*siz[2];}

	inline  GridStaticObj() { grid = 0; }
	inline ~GridStaticObj() { if(grid) delete[] grid; }
  inline Init(const ObjType &val)
		{
		 fill(grid,grid+size(),val);
		}


		/// Date le coordinate ritorna la cella
    inline ObjType & Grid( const int x, const int y, const int z ) {return grid[GridInd(Point3i(x,y,z))]; }
    
    // Dato un punto ritorna la cella  
    inline ObjType & Grid( const Point3<FLT> & p )                 {				return grid[GridInd(p)];		}

		inline int GridInd( const Point3i & pi ) const
		{
#ifndef NDEBUG
			if ( pi[0]<0 || pi[0]>=siz[0] || pi[1]<0 || pi[1]>=siz[1] || pi[2]<0 || pi[2]>=siz[2] )
			{	assert(0);
				return 0;
			} 
#endif
			return pi[0]+siz[0]*(pi[1]+siz[1]*pi[2]);
		}

		// Dato un punto ritorna l'indice della cella
    inline int GridInd( const Point3<FLT> & p ) const { return GridInd(GridP(p)); 	}
  
	void Create( Point3i &_siz, const ObjType & init )
	{
		siz=_siz;
	 	voxel[0] = dim[0]/siz[0];
		voxel[1] = dim[1]/siz[1];
		voxel[2] = dim[2]/siz[2];

		if(grid) delete[] grid;
		int n = siz[0]*siz[1]*siz[2];
		grid = new ObjType[n];
		fill(grid,grid+n,init);
	}

	/// Crea una griglia di un dato bbox e con un certo numero di elem.
  /// il bbox viene gonfiato appositamente.

  template<class FLT2>
  void Create(const Box3<FLT2> & b, int ncell, const ObjType & init, bool Inflate = true )
	{
		bbox.Import(b);
		if(Inflate) bbox.Offset(0.01*bbox.Diag());
		dim  = bbox.max - bbox.min;

    // Calcola la dimensione della griglia
		Point3i _siz;
    BestDim( ncell, dim, _siz );
    Create(_siz, init );
	}
};
//end class SGrid


}
#endif