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
|
/*=========================================================================
Program: Insight Segmentation & Registration Toolkit
Module: $RCSfile: itkSimplexMeshToTriangleMeshFilter.txx,v $
Language: C++
Date: $Date: 2004-11-08 13:33:19 $
Version: $Revision: 1.5 $
Copyright (c) Insight Software Consortium. All rights reserved.
See ITKCopyright.txt or http://www.itk.org/HTML/Copyright.htm for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notices for more information.
=========================================================================*/
#ifndef __SimplexMeshToTriangleMeshFilter_txx
#define __SimplexMeshToTriangleMeshFilter_txx
#include "itkSimplexMeshToTriangleMeshFilter.h"
namespace itk
{
template<typename TInputMesh, typename TOutputMesh>
SimplexMeshToTriangleMeshFilter<TInputMesh,TOutputMesh>::SimplexMeshToTriangleMeshFilter()
{
}
template <typename TInputMesh, typename TOutputMesh>
SimplexMeshToTriangleMeshFilter<TInputMesh, TOutputMesh>
::~SimplexMeshToTriangleMeshFilter()
{
}
template <typename TInputMesh, typename TOutputMesh>
void SimplexMeshToTriangleMeshFilter<TInputMesh, TOutputMesh>
::GenerateData()
{
this->Initialize();
this->CreateTriangles();
}
template <typename TInputMesh, typename TOutputMesh>
void SimplexMeshToTriangleMeshFilter<TInputMesh, TOutputMesh>
::Initialize()
{
SimplexVisitorInterfacePointer simplexVisitor = SimplexVisitorInterfaceType::New();
simplexVisitor->SetMesh( this->GetInput(0) );
CellMultiVisitorPointer mv = CellMultiVisitorType::New();
mv->AddVisitor(simplexVisitor);
this->GetInput(0)->Accept(mv);
this->GetInput(0)->BuildCellLinks();
m_Centers = simplexVisitor->GetCenterMap();
}
template <typename TInputMesh, typename TOutputMesh>
void SimplexMeshToTriangleMeshFilter<TInputMesh, TOutputMesh>
::CreateTriangles()
{
typename AutoMeshSourceType::Pointer meshSource = AutoMeshSourceType::New();
typename AutoMeshSourceType::PointType p1,p2,p3;
typename TInputMesh::Pointer inputMesh = this->GetInput(0);
typename InputPointsContainer::Pointer points = inputMesh->GetPoints();
typename TInputMesh::PointsContainerIterator pointsIt = points->Begin();
meshSource->Update();
while ( pointsIt != points->End() )
{
typename InputMeshType::IndexArray n = this->GetInput(0)->GetNeighbors( pointsIt.Index() );
unsigned long newId1 = FindCellId(n[0], pointsIt.Index(), n[1]);
unsigned long newId2 = FindCellId(n[1], pointsIt.Index(), n[2]);
unsigned long newId3 = FindCellId(n[2], pointsIt.Index(), n[0]);
bool b1 = m_Centers->GetElementIfIndexExists(newId1, &p1 );
bool b2 = m_Centers->GetElementIfIndexExists(newId2, &p2 );
bool b3 = m_Centers->GetElementIfIndexExists(newId3, &p3 );
meshSource->AddTriangle(p1,p2,p3);
if( !(b1 && b2 && b3) )
{
itkExceptionMacro(<<"Assertion failed for test of GetElementIfIndexExists()");
}
pointsIt++;
}
this->ProcessObject::SetNthOutput(0, meshSource->GetOutput());
}
template <typename TInputMesh, typename TOutputMesh>
unsigned long SimplexMeshToTriangleMeshFilter<TInputMesh, TOutputMesh>
::FindCellId(unsigned long id1, unsigned long id2, unsigned long id3)
{
std::set<unsigned long> cells1 = this->GetInput(0)->GetCellLinks()->GetElement(id1);
std::set<unsigned long> cells2 = this->GetInput(0)->GetCellLinks()->GetElement(id2);
std::set<unsigned long> cells3 = this->GetInput(0)->GetCellLinks()->GetElement(id3);
std::set<unsigned long>::iterator cellIt = cells1.begin();
while (cellIt != cells1.end() )
{
std::set<unsigned long>::iterator found2 = std::find(cells2.begin(), cells2.end(), *cellIt);
std::set<unsigned long>::iterator found3 = std::find(cells3.begin(), cells3.end(), *cellIt);
if ( found2 != cells2.end() && found3 != cells3.end() )
{
break;
}
cellIt++;
}
if (cellIt == cells1.end() )
{
itkExceptionMacro(<<"Cell was not found, altough it should be there");
}
return *cellIt;
}
/* PrintSelf. */
template <typename TInputMesh, typename TOutputMesh>
void
SimplexMeshToTriangleMeshFilter<TInputMesh, TOutputMesh>
::PrintSelf(std::ostream& os, Indent indent) const
{
Superclass::PrintSelf(os,indent);
os << indent << "ToDo: implement PrinSelf!!!";
}
} // end of namspace itk
#endif //__SimplexMeshToTriangleMeshFilter_txx
|
