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| This example demonstrates decimation of an itk::QuadEdgeMesh. The input mesh is created by the itk::RegularSphereMeshSource filter and written out by the example.
| | {{warning|1=The media wiki content on this page is no longer maintained.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.}} |
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| Usage is as follows:
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| <source lang="text">
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| ./MeshDecimation inputMesh.obj outputMesh.obj [N] | |
| </source>
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| where N is the number of target triangles in the output mesh. The default target is 100, if none is provided.
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| <source lang="cpp">
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| #include <iostream>
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| #include "itkRegularSphereMeshSource.h"
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| #include "itkQuadEdgeMesh.h"
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| #include "itkQuadEdgeMeshDecimationCriteria.h"
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| #include "itkSquaredEdgeLengthDecimationQuadEdgeMeshFilter.h"
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| #include "itkMeshFileWriter.h"
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| const unsigned int Dimension = 3;
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| typedef itk::QuadEdgeMesh< float, Dimension > MeshType;
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| typedef itk::RegularSphereMeshSource< MeshType > MeshSourceType;
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| typedef itk::NumberOfFacesCriterion<MeshType> CriterionType;
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| typedef itk::SquaredEdgeLengthDecimationQuadEdgeMeshFilter<MeshType,
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| MeshType,
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| CriterionType> DecimationType;
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| typedef itk::MeshFileWriter< MeshType > MeshWriterType;
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| int main( int argc, char ** argv )
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| {
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| if (argc < 3)
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| {
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| std::cerr << "Usage: " << argv[0] << " <inputMesh> <outputMesh> [<count>]" << std::endl;
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| return EXIT_FAILURE;
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| }
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| const unsigned int TriangleCount = (argc >= 4) ? atoi(argv[3]) : 100;
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| MeshSourceType::Pointer source = MeshSourceType::New();
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| CriterionType::Pointer criterion = CriterionType::New();
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| DecimationType::Pointer decimate = DecimationType::New();
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| criterion->SetTopologicalChange(false);
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| criterion->SetNumberOfElements(TriangleCount);
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| decimate->SetInput(source->GetOutput());
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| decimate->SetCriterion(criterion);
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| decimate->Update();
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| std::cout << "Number of cells in source mesh: "
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| << source->GetOutput()->GetNumberOfCells() << std::endl;
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| std::cout << "Number of cells in decimated mesh: "
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| << decimate->GetOutput()->GetNumberOfCells() << std::endl;
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| MeshWriterType::Pointer writer = MeshWriterType::New();
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| writer->SetFileName( argv[1] );
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| writer->SetInput( source->GetOutput() );
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| writer->Update();
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| writer->SetFileName( argv[2] );
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| writer->SetInput( decimate->GetOutput() );
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| writer->Update();
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| return EXIT_SUCCESS;
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| } | |
| </source>
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