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vcglib/apps/test/lem/insert_vertex.h

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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. *
* *
****************************************************************************/
/****************************************************************************
History
****************************************************************************/
#ifndef __VCG_TRI_INSERT_VERTEX
#define __VCG_TRI_INSERT_VERTEX
#include<vcg\simplex\face\pos.h>
#include<vcg\simplex\face\topology.h>
#include<vcg\complex\trimesh\update\topology.h>
#include<vcg\complex\trimesh\allocate.h>
/// This Class is used for insertiong a vertex in a face
namespace vcg{
namespace tri{
template <class FACE_TYPE>
void FFAttach(FACE_TYPE *f0,int z0,FACE_TYPE *f1,int z1)
{
f0->FFp(z0)=f1;
f0->FFi(z0)=z1;
f1->FFp(z1)=f0;
f1->FFi(z1)=z0;
}
template <class MESH_TYPE>
///insert a vertex iside a face and re-triangolarize v will be pointer to inserted vertex
void InsertVertEdge(MESH_TYPE &m,typename MESH_TYPE::FaceType** f,int edge,typename MESH_TYPE::VertexType *&v)
{
std::vector<MESH_TYPE::FaceType **> local_var;
local_var.push_back(f);
MESH_TYPE::VertexIterator Vi=vcg::tri::Allocator<MESH_TYPE>::AddVertices(m,1);
MESH_TYPE::FaceIterator Finit=vcg::tri::Allocator<MESH_TYPE>::AddFaces(m,4,local_var);
if (MESH_TYPE::HasVFTopology())
Vi->VFp()=0;
MESH_TYPE::FaceIterator Fi=Finit;
//take new faces added
MESH_TYPE::FaceType *Fr0=&(*Fi);
Fi++;
MESH_TYPE::FaceType *Fr1=&(*Fi);
Fi++;
MESH_TYPE::FaceType *Fl0=&(*Fi);
Fi++;
MESH_TYPE::FaceType *Fl1=&(*Fi);
//old faces
MESH_TYPE::FaceType *fdl=(*f);
MESH_TYPE::FaceType *fdr=(*f)->FFp(edge);
int edgel=edge;
int edger=(*f)->FFi(edge);
//opposite vertex used to build new triangles
MESH_TYPE::VertexType *voppl=fdl->V((edgel+2)%3);
MESH_TYPE::VertexType *voppr=fdr->V((edger+2)%3);
//inizialize the for new faces
Fl0->V(0)=voppl;
Fl0->V(1)=fdl->V(edgel);
Fl0->V(2)=&(*Vi);
Fl1->V(0)=voppl;
Fl1->V(1)=&(*Vi);
Fl1->V(2)=fdl->V((edgel+1)%3);
Fr0->V(0)=voppr;
Fr0->V(1)=&(*Vi);
Fr0->V(2)=fdr->V((edger+1)%3);
Fr1->V(0)=voppr;
Fr1->V(1)=fdr->V(edger);
Fr1->V(2)=&(*Vi);
//VFTopology setting
if (MESH_TYPE::HasVFTopology())
{
for (int i=0;i<3;i++)
{
//initial settings
Fl0->VFp(i)=0;
Fl1->VFp(i)=0;
Fr0->VFp(i)=0;
Fr1->VFp(i)=0;
//append new faces to VF topology
vcg::face::VFAppend<MESH_TYPE::FaceType>(Fl0,i);
vcg::face::VFAppend<MESH_TYPE::FaceType>(Fl1,i);
vcg::face::VFAppend<MESH_TYPE::FaceType>(Fr0,i);
vcg::face::VFAppend<MESH_TYPE::FaceType>(Fr1,i);
//erase old faces from VF topology
vcg::face::VFDetach<MESH_TYPE::FaceType>((*fdl),i);
vcg::face::VFDetach<MESH_TYPE::FaceType>((*fdr),i);
}
}
//FFTopology setting
if (MESH_TYPE::HasFFTopology())
{
//attach old faces that was attached by
//the one that should be substituted
FFAttach(Fl0,0,fdl->FFp((edgel+2)%3),fdl->FFi((edgel+2)%3));
FFAttach(Fl1,2,fdl->FFp((edgel+1)%3),fdl->FFi((edgel+1)%3));
FFAttach(Fr0,2,fdr->FFp((edger+1)%3),fdr->FFi((edger+1)%3));
FFAttach(Fr1,0,fdr->FFp((edger+2)%3),fdr->FFi((edger+2)%3));
//then connect between thenselfes
FFAttach(Fl0,2,Fl1,0);
FFAttach(Fl0,1,Fr0,1);
FFAttach(Fl1,1,Fr1,1);
FFAttach(Fr0,0,Fr1,2);
}
//finally set as deleted the old faces
fdl->SetD();
fdr->SetD();
v=&(*Vi);
}
template <class MESH_TYPE>
///insert a vertex iside a face and re-triangolarize v will be pointer to inserted vertex
void InsertVertFace(MESH_TYPE &m,typename MESH_TYPE::FaceType** f,typename MESH_TYPE::VertexType *&v)
{
assert(!(*f)->IsD());
std::vector<MESH_TYPE::FaceType **> local_var;
local_var.push_back(f);
MESH_TYPE::VertexIterator Vi=vcg::tri::Allocator<MESH_TYPE>::AddVertices(m,1);
MESH_TYPE::FaceIterator Finit=vcg::tri::Allocator<MESH_TYPE>::AddFaces(m,3,local_var);
if (MESH_TYPE::HasVFTopology())
Vi->VFp()=0;
MESH_TYPE::FaceIterator Fi=Finit;
MESH_TYPE::FaceType *F;
MESH_TYPE::FaceType *fd=(*f);
//set vertex pointer of new face
for (int i=0;i<3;i++)
{
F=&(*Fi);
assert(!fd->V(i)->IsD());
assert(!Vi->IsD());
F->V(0)=fd->V(i);
F->V(1)=fd->V((i+1)%3);
F->V(2)=&(*Vi);
//assign topology in substitution of the old one
if (MESH_TYPE::HasFFTopology())
{
FFAttach(F,0,fd->FFp(i),fd->FFi(i));
}
if (MESH_TYPE::HasVFTopology())
{
F->VFp(0)=0;
F->VFp(1)=0;
F->VFp(2)=0;
//put new faces on list of the old vertex and new one
vcg::face::VFAppend<MESH_TYPE::FaceType>(F,0);
vcg::face::VFAppend<MESH_TYPE::FaceType>(F,1);
vcg::face::VFAppend<MESH_TYPE::FaceType>(F,2);
vcg::face::VFDetach<MESH_TYPE::FaceType>((*fd),i);
}
Fi++;
}
//then attach the faces between themselfes
Fi=Finit;
MESH_TYPE::FaceIterator Fsucc=Fi;
Fsucc++;
MESH_TYPE::FaceType *F0=&(*Fi);
MESH_TYPE::FaceType *F1=&(*Fsucc);
FFAttach<MESH_TYPE::FaceType>(F0,1,F1,2);
Fi++;
Fsucc++;
F0=&(*Fi);
F1=&(*Fsucc);
FFAttach<MESH_TYPE::FaceType>(F0,1,F1,2);
Fsucc=Finit;
Fi++;
F0=&(*Fi);
F1=&(*Fsucc);
FFAttach<MESH_TYPE::FaceType>(F0,1,F1,2);
//at the end set as deleted the old face that was substituted
fd->SetD();
v=&(*Vi);
}
}
}
#endif
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