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/****************************************************************************
* VCGLib o o *
* Visual and Computer Graphics Library o o *
* _ O _ *
* Copyright(C) 2004-2016 \/)\/ *
* 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. *
* *
****************************************************************************/
#ifndef __VCGLIB_UGRID_2D
#define __VCGLIB_UGRID_2D
#include <vector>
#include <algorithm>
#include <stdio.h>
#include <vcg/space/box2.h>
#include <vcg/space/line2.h>
#include <vcg/space/index/grid_util2d.h>
#include <vcg/space/index/grid_closest2d.h>
namespace vcg {
template < class OBJTYPE, class FLT=float >
class GridStaticPtr2D: public BasicGrid2D<FLT>, SpatialIndex2D<OBJTYPE,FLT>
{
public:
typedef OBJTYPE ObjType;
typedef ObjType* ObjPtr;
typedef typename ObjType::ScalarType ScalarType;
typedef Point2<ScalarType> CoordType;
typedef Box2<ScalarType> Box2x;
typedef GridStaticPtr2D<OBJTYPE,FLT> MyGridType;
typedef typename std::vector<OBJTYPE*>::iterator CellIterator;
std::vector<std::vector<std::vector<OBJTYPE*> > > data;
private:
void Add( const int x,
const int y,
ObjType *elem)
{
assert((x>=0)&&(x<(int)data.size()));
assert((y>=0)&&(y<(int)data[x].size()));
data[x][y].push_back(elem);
}
template <class OBJITER>
inline void Set(const OBJITER & _oBegin,
const OBJITER & _oEnd,
const Box2x &_bbox,
Point2i _siz)
{
this->bbox=_bbox;
this->siz=_siz;
// find voxel size starting from the provided bbox and grid size.
this->dim = this->bbox.max - this->bbox.min;
this->voxel.X() = (this->dim.X()/(ScalarType)this->siz.X());
this->voxel.Y() = (this->dim.Y()/(ScalarType)this->siz.Y());
///allocate space
data.resize(this->siz.X());
for (size_t x=0;x<data.size();x++)
data[x].resize(this->siz.Y());
OBJITER IteObj;
for (IteObj=_oBegin;IteObj!=_oEnd;IteObj++)
{
Box2<ScalarType> Box2D;
(*IteObj).GetBBox(Box2D);
//get index of intersected cells
Point2i minIndex=this->GridP(Box2D.min);
Point2i maxIndex=this->GridP(Box2D.max);
for (int x=minIndex.X();x<=maxIndex.X();x++)
for (int y=minIndex.Y();y<=maxIndex.Y();y++)
Add(x,y,&(*IteObj));
}
}
template <class OBJITER>
inline void Set(const OBJITER & _oBegin,
const OBJITER & _oEnd,
const Box2x &_bbox)
{
int _size=(int)std::distance<OBJITER>(_oBegin,_oEnd);
Point2<FLT> _dim = _bbox.max - _bbox.min;
Point2i _siz;
BestDim2D( _size, _dim, _siz );
Set(_oBegin,_oEnd,_bbox,_siz);
}
public:
void Grid( const int x, const int y,
CellIterator & first,
CellIterator & last )
{
first = data[x][y].begin();
last = data[x][y].end();
}
void Grid( const Point2i pi,
CellIterator & first,
CellIterator & last )
{
return Grid(pi.X(),pi.Y(),first,last);
}
template <class OBJITER>
inline void Set(const OBJITER & _oBegin,
const OBJITER & _oEnd)
{
Box2x bbox,ibbox;
OBJITER IteObj;
for (IteObj=_oBegin;IteObj!=_oEnd;IteObj++)
{
(*IteObj).GetBBox(ibbox);
bbox.Add(ibbox);
}
ScalarType diag=bbox.Diag();
bbox.Offset(diag*0.01);
Set<OBJITER>(_oBegin,_oEnd,bbox);
}
template <class OBJPOINTDISTFUNCTOR, class OBJMARKER>
ObjPtr GetClosest(OBJPOINTDISTFUNCTOR & _getPointDistance,
OBJMARKER & _marker,
const typename OBJPOINTDISTFUNCTOR::QueryType & _p,
const ScalarType & _maxDist,
ScalarType & _minDist,
CoordType & _closestPt)
{
return (vcg::GridClosest2D<MyGridType,OBJPOINTDISTFUNCTOR,OBJMARKER>(*this,_getPointDistance,_marker, _p,_maxDist,_minDist,_closestPt));
}
template <class OBJMARKER, class OBJPTRCONTAINER>
unsigned int GetInBox(OBJMARKER & _marker,
const vcg::Box2<ScalarType> _bbox,
OBJPTRCONTAINER & _objectPtrs)
{
return(vcg::GridGetInBox2D<MyGridType,OBJMARKER,OBJPTRCONTAINER>
(*this,_marker,_bbox,_objectPtrs));
}
template <class OBJRAYISECTFUNCTOR, class OBJMARKER>
ObjPtr DoRay(OBJRAYISECTFUNCTOR & _rayIntersector, OBJMARKER & _marker,
const Ray2<ScalarType> & _ray, const ScalarType & _maxDist,
ScalarType & _t)
{
return(vcg::GridDoRay2D<MyGridType,OBJRAYISECTFUNCTOR,OBJMARKER>(*this,_rayIntersector,_marker,_ray,_maxDist,_t));
}
}; //end class GridStaticPtr_2D
} // end namespace
#endif
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