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First working version

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Paolo Cignoni 2005-07-28 08:41:00 +00:00
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vcg/space/index/grid_static_obj.h Normal file
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/****************************************************************************
* 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. *
* *
****************************************************************************/
/****************************************************************************
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$Log: not supported by cvs2svn $
Revision 1.13 2005/04/14 17:23:08 ponchio
*** empty log message ***
****************************************************************************/
#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