1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
|
/****************************************************************************
* 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_DUAL_MESH
#define __VCGLIB_DUAL_MESH
#include <vcg/complex/complex.h>
#include <vcg/complex/algorithms/update/topology.h>
#include <vcg/simplex/face/pos.h>
#include <vcg/complex/algorithms/clean.h>
#include <vcg/complex/algorithms/polygonal_algorithms.h>
namespace vcg {
namespace tri {
template <class PolyMeshType>
class DualMeshing
{
typedef typename PolyMeshType::VertexType VertexType;
typedef typename PolyMeshType::FaceType FaceType;
typedef typename PolyMeshType::CoordType CoordType;
typedef typename PolyMeshType::ScalarType ScalarType;
static void ComposeFace(VertexType &startV,
FaceType &startF,
std::map<std::pair<int,int>, int> &EdgeMap,
const std::vector<int> &FaceMap,
const PolyMeshType &primal,
std::vector<int> &vertSeq)
{
(void)EdgeMap;
vcg::face::Pos<FaceType> startP(&startF,&startV);
//get the star of pos
std::vector<vcg::face::Pos<FaceType> > posVec;
vcg::face::VFOrderedStarFF(startP,posVec);
for (size_t i=0;i<posVec.size();i++)
{
FaceType *f=posVec[i].F();
int indexF=vcg::tri::Index(primal,f);
int indexV=FaceMap[indexF];
vertSeq.push_back(indexV);
}
}
static void CreateFaceVert(PolyMeshType &primal,
PolyMeshType &dual,
std::vector<int> &VertMap,
std::vector<int> &VertFace,
bool snapBorder)
{
VertMap.clear();
VertMap.resize(primal.face.size(),-1);
VertFace.clear();
VertFace.resize(primal.vert.size(),-1);
for (size_t i=0;i<primal.face.size();i++)
{
CoordType pos(0,0,0);
int num=0;
if (snapBorder)//search for border edge
{
for (int j=0;j<primal.face[i].VN();j++)
{
if (!primal.face[i].V(j)->IsB())continue;
pos+=primal.face[i].P(j);
num++;
}
if (num>0)
pos/=num;
}
if (num==0)
{
for (int j=0;j<primal.face[i].VN();j++)
{
pos+=primal.face[i].V(j)->P();
}
pos/=(ScalarType)primal.face[i].VN();
}
vcg::tri::Allocator<PolyMeshType>::AddVertex(dual,pos);
VertMap[i]=dual.vert.size()-1;
dual.vert.back().Q()=i;
}
//then initialize VF first face
for (size_t i=0;i<primal.face.size();i++)
for (int j=0;j<primal.face[i].VN();j++)
{
int indexV=vcg::tri::Index(primal,primal.face[i].V(j));
if (VertFace[indexV]!=-1)continue;
VertFace[indexV]=i;
}
}
public:
static void MakeDual(PolyMeshType &primal,
PolyMeshType &dual,
bool snapBorder=true)
{
dual.Clear();
vcg::tri::RequirePolygonalMesh(primal);
vcg::tri::RequirePolygonalMesh(dual);
vcg::tri::RequireFFAdjacency(primal);
vcg::tri::RequirePerFaceQuality(dual);
vcg::tri::UpdateTopology<PolyMeshType>::FaceFace(primal);
vcg::tri::UpdateFlags<PolyMeshType>::VertexBorderFromFaceAdj(primal);
std::map<std::pair<int,int>, int> VertEdgeMap;
std::cout<<"Creating Dual Vertices"<<std::endl;
std::vector<int> VertFaceMap,VertFace;
CreateFaceVert(primal,dual,VertFaceMap,VertFace,snapBorder);
std::cout<<"Creating Dual Faces"<<std::endl;
for (size_t i=0;i<primal.vert.size();i++)
{
if (primal.vert[i].IsB())continue;
FaceType *firstF=&primal.face[VertFace[i]];
std::vector<int> VertSeq;
ComposeFace(primal.vert[i],*firstF,VertEdgeMap,VertFaceMap,primal,VertSeq);
vcg::tri::Allocator<PolyMeshType>::AddFaces(dual,1);
dual.face.back().Alloc(VertSeq.size());
for (size_t j=0;j<VertSeq.size();j++)
dual.face.back().V(j)=&dual.vert[VertSeq[j]];
dual.face.back().Q()=i;
}
vcg::tri::Clean<PolyMeshType>::RemoveUnreferencedVertex(dual);
//finally remove valence 1 vertices on the border
vcg::PolygonalAlgorithm<PolyMeshType>::RemoveValence2Vertices(dual);
}
};
}
}
#endif // __VCGLIB_DUAL_MESH
|
