203 lines
6.6 KiB
C++
203 lines
6.6 KiB
C++
/****************************************************************************
|
|
* 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 1.6 2004/05/14 00:34:36 ganovelli
|
|
header added
|
|
|
|
****************************************************************************/
|
|
|
|
#ifndef __VCG_CLOSEST
|
|
#define __VCG_CLOSEST
|
|
#include <math.h>
|
|
|
|
#include <vcg/space/point3.h>
|
|
#include <vcg/space/box3.h>
|
|
#include <vcg/space/point4.h>
|
|
#include <vcg/math/base.h>
|
|
#include <vcg/space/index/grid_static_ptr.h>
|
|
|
|
|
|
using namespace vcg;
|
|
|
|
|
|
/*
|
|
aka MetroCore
|
|
data una mesh m e una ug sulle sue facce trova il punto di m piu' vicino ad
|
|
un punto dato.
|
|
*/
|
|
|
|
// input: mesh, punto, griglia, distanza limite
|
|
// output: normale alla faccia e punto piu' vicino su di essa
|
|
|
|
// Nota che il parametro template GRID non ci dovrebbe essere, visto che deve essere
|
|
// UGrid<MESH::FaceContainer >, ma non sono riuscito a definirlo implicitamente
|
|
|
|
template <class MESH, class GRID, class SCALAR>
|
|
void Closest( MESH & mesh, const Point3<SCALAR> & p, GRID & gr, SCALAR & mdist,
|
|
Point3<SCALAR> & normf, Point3<SCALAR> & bestq, typename MESH::FaceType * &f, Point3<SCALAR> &ip)
|
|
{
|
|
typedef SCALAR scalar;
|
|
typedef Point3<scalar> Point3x;
|
|
typedef Box3<SCALAR> Box3x;
|
|
|
|
if(!gr.bbox.IsIn(p)) return;
|
|
typedef typename GridStaticPtr<typename MESH::FaceContainer>::Link A2UGridLink;
|
|
scalar ax = p[0] - gr.bbox.min[0]; // Real coodinate of point refer to
|
|
scalar ay = p[1] - gr.bbox.min[1];
|
|
scalar az = p[2] - gr.bbox.min[2];
|
|
|
|
int gx = int( ax/gr.voxel[0] ); // Integer coordinate of the point
|
|
int gy = int( ay/gr.voxel[1] ); // voxel
|
|
int gz = int( az/gr.voxel[2] );
|
|
|
|
scalar vx = gr.bbox.min[0]+gx*gr.voxel[0]; // Real world coordinate of the Voxel
|
|
scalar vy = gr.bbox.min[1]+gy*gr.voxel[1]; // origin
|
|
scalar vz = gr.bbox.min[2]+gz*gr.voxel[2];
|
|
|
|
scalar dx = math::Min(p[0] - vx, vx+gr.voxel[0]-p[0]); // Dist from the voxel
|
|
scalar dy = math::Min(p[1] - vy, vy+gr.voxel[1]-p[1]);
|
|
scalar dz = math::Min(p[2] - vz, vz+gr.voxel[2]-p[2]);
|
|
|
|
scalar vdist,vstep;
|
|
|
|
if(dx<dy && dx<dz)
|
|
{
|
|
vdist = dx;
|
|
vstep = gr.voxel[0];
|
|
}
|
|
else if(dy<dz)
|
|
{
|
|
vdist = dy;
|
|
vstep = gr.voxel[1];
|
|
}
|
|
else
|
|
{
|
|
vdist = dz;
|
|
vstep = gr.voxel[2];
|
|
}
|
|
|
|
//scalar error = gr.bbox.SquaredDiag();
|
|
//scalar error = gr.bbox.Diag();
|
|
scalar error = mdist;
|
|
Point3x q;
|
|
typename MESH::FaceIterator bestf = (typename MESH::FaceIterator)0;
|
|
|
|
mesh.UnMarkAll();
|
|
|
|
int mxsd = gr.siz[0];
|
|
if(mxsd<gr.siz[1]) mxsd = gr.siz[1];
|
|
if(mxsd<gr.siz[2]) mxsd = gr.siz[2];
|
|
for(int s=0;s<mxsd;++s)
|
|
{
|
|
if(s==0)
|
|
{
|
|
|
|
A2UGridLink *first, *last, *l;
|
|
gr.Grid( gx, gy, gz, first, last );
|
|
for(l=first;l!=last;++l)
|
|
|
|
if( ! mesh.IsMarked( &*(l->Elem())) )
|
|
{
|
|
if( Dist((*(l->Elem())), p, error, q) )
|
|
{
|
|
bestq = q;
|
|
bestf = l->Elem();
|
|
typename MESH::ScalarType alfa=1, beta=1, gamma=1;
|
|
|
|
//bestf->InterpolationParameters(q, alfa, beta);
|
|
//calcolo normale con interpolazione trilineare
|
|
/*normf = (1-(alfa+beta))*(bestf->V(0)->Normal())+
|
|
(alfa*(bestf->V(1)->Normal()))+
|
|
(beta*(bestf->V(2)->Normal()));*/
|
|
bestf->InterpolationParameters(q, alfa, beta, gamma);
|
|
//assert(ret);
|
|
normf = (bestf->V(0)->cN())*alfa+
|
|
(bestf->V(1)->cN())*beta+
|
|
(bestf->V(2)->cN())*gamma;
|
|
normf.Normalize();
|
|
ip[0]=alfa;ip[1]=beta;ip[2]=gamma;
|
|
|
|
}
|
|
|
|
mesh.Mark( &*(l->Elem()) );
|
|
}
|
|
}
|
|
else
|
|
{
|
|
for(int ix=gx-s;ix<=gx+s;++ix)
|
|
if( ix>=0 && ix<gr.siz[0] )
|
|
{
|
|
for(int iy=gy-s;iy<=gy+s;++iy)
|
|
if( iy>=0 && iy<gr.siz[1] )
|
|
{
|
|
int sz = ( ix==gx-s || ix==gx+s ||
|
|
iy==gy-s || iy==gy+s )?1:2*s;
|
|
for(int iz=gz-s;iz<=gz+s;iz+=sz)
|
|
if( iz>=0 && iz<gr.siz[2] )
|
|
{
|
|
A2UGridLink *first, *last, *l;
|
|
gr.Grid( ix, iy, iz, first, last );
|
|
for(l=first;l!=last;++l)
|
|
if( ! mesh.IsMarked( &*(l->Elem())) )
|
|
{
|
|
if( Dist((*(l->Elem())), p, error, q) )
|
|
{
|
|
bestq = q;
|
|
bestf = l->Elem();
|
|
typename MESH::ScalarType alfa, beta, gamma;
|
|
//bestf->InterpolationParameters(q, alfa, beta);
|
|
//calcolo normale con interpolazione trilineare
|
|
bestf->InterpolationParameters(q, alfa, beta, gamma);
|
|
normf = (bestf->V(0)->cN())*alfa+
|
|
(bestf->V(1)->cN())*beta+
|
|
(bestf->V(2)->cN())*gamma ;
|
|
ip[0]=alfa;ip[1]=beta;ip[2]=gamma;
|
|
//normf.Normalize(); inutile si assume le normali ai vertici benfatte
|
|
}
|
|
mesh.Mark(&*l->Elem());
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if( fabs(error)<vdist )
|
|
break;
|
|
vdist += vstep;
|
|
}
|
|
f=&*bestf;
|
|
mdist = scalar(fabs(error));
|
|
}
|
|
|
|
template <class MESH, class GRID, class SCALAR>
|
|
void MinDistPoint( MESH & mesh, const Point3<SCALAR> & p, GRID & gr, SCALAR & mdist,
|
|
Point3<SCALAR> & normf, Point3<SCALAR> & bestq, typename MESH::face_type * &f)
|
|
{
|
|
Point3<SCALAR> ip;
|
|
MinDistPoint(mesh,p,gr,mdist,normf,bestq,f,ip);
|
|
}
|
|
#endif
|