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| ==VTKPolyDataWriter.cxx==
| | {{warning|1=The media wiki content on this page is no longer maintained. The examples presented on the https://itk.org/Wiki/* pages likely require ITK version 4.13 or earlier releases. In many cases, the examples on this page no longer conform to the best practices for modern ITK versions.}} |
| <source lang="cpp">
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| #include "itkMesh.h"
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| #include "itkLineCell.h"
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| #include "itkVTKPolyDataWriter.h"
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| | |
| const unsigned int Dimension = 3;
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| typedef itk::Mesh< float, Dimension > MeshType;
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|
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| MeshType::Pointer CreateMeshWithEdges();
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| int main(int, char *[])
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| { | |
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| MeshType::Pointer mesh = CreateMeshWithEdges();
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| typedef itk::VTKPolyDataWriter<MeshType> WriterType;
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| WriterType::Pointer writer = WriterType::New();
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| writer->SetInput(mesh);
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| writer->SetFileName("test.vtk");
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| writer->Update();
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|
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| return EXIT_SUCCESS;
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| }
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| MeshType::Pointer CreateMeshWithEdges()
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| { | |
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| MeshType::Pointer mesh = MeshType::New();
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| // Create points
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| MeshType::PointType p0,p1,p2,p3;
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| p0[0]= -1.0; p0[1]= -1.0; p0[2]= 0.0; // first point ( -1, -1, 0 )
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| p1[0]= 1.0; p1[1]= -1.0; p1[2]= 0.0; // second point ( 1, -1, 0 )
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| p2[0]= 1.0; p2[1]= 1.0; p2[2]= 0.0; // third point ( 1, 1, 0 )
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| p3[0]= 1.0; p3[1]= 1.0; p3[2]= 1.0; // third point ( 1, 1, 1 )
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| mesh->SetPoint( 0, p0 );
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| mesh->SetPoint( 1, p1 );
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| mesh->SetPoint( 2, p2 );
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| mesh->SetPoint( 3, p3 ); | |
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| std::cout << "Points = " << mesh->GetNumberOfPoints() << std::endl;
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| //access points
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| typedef MeshType::PointsContainer::Iterator PointsIterator;
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| PointsIterator pointIterator = mesh->GetPoints()->Begin();
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| PointsIterator end = mesh->GetPoints()->End();
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| while( pointIterator != end )
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| {
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| MeshType::PointType p = pointIterator.Value(); // access the point
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| std::cout << p << std::endl; // print the point
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| ++pointIterator; // advance to next point
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| }
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| | |
| typedef MeshType::CellType::CellAutoPointer CellAutoPointer;
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| typedef itk::LineCell< MeshType::CellType > LineType;
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| CellAutoPointer line0;
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| line0.TakeOwnership( new LineType );
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| line0->SetPointId(0, 0); // line between points 0 and 1
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| line0->SetPointId(1, 1);
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| mesh->SetCell( 0, line0);
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| CellAutoPointer line1;
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| line1.TakeOwnership( new LineType );
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| line1->SetPointId(0, 1); // line between points 1 and 2
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| line1->SetPointId(1, 2);
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| mesh->SetCell( 1, line1);
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| CellAutoPointer line2;
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| line2.TakeOwnership( new LineType );
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| line2->SetPointId(0, 2); // line between points 2 and 3
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| line2->SetPointId(1, 3);
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| mesh->SetCell( 2, line2);
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| /*
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| typedef MeshType::CellsContainer::Iterator CellIterator;
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| CellIterator cellIterator = mesh->GetCells()->Begin();
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| CellIterator CellsEnd = mesh->GetCells()->End();
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| while( cellIterator != CellsEnd )
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| {
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| MeshType::CellType * cellptr = cellIterator.Value();
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| LineType * line = dynamic_cast<LineType *>( cellptr );
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| long unsigned int* linePoint0 = line->PointIdsBegin();
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| //long unsigned int* linePoint1 = line->PointIdsEnd();
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| long unsigned int* linePoint1 = linePoint0+1;
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| std::cout << "line first point id: " << *linePoint0 << std::endl;
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| std::cout << "line second point id: " << *linePoint1 << std::endl;
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| ++cellIterator;
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| }
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| */
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| return mesh;
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| }
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| </source>
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| {{ITKCMakeLists|VTKPolyDataWriter}}
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