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| This example reads a mesh from a vtk file. It then compute the planar parameterization
| | {{warning|1=The media wiki content on this page is no longer maintained.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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| The sample sphere file is [http://www.itk.org/Wiki/images/8/89/Sphere.vtk.zip here].
| | [https://itk.org/ITKExamples[ITK Sphinx Examples]] |
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| ==QuadEdgeMeshParameterizationFilter.cxx==
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| <source lang="cpp">
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| #include "itkVTKPolyDataReader.h"
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| #include "itkVTKPolyDataWriter.h"
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| #include "VNLIterativeSparseSolverTraits.h"
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| #include "itkParameterizationQuadEdgeMeshFilter.h"
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| int main( int argc, char* argv[] )
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| {
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| // ** ERROR MESSAGE AND HELP ** //
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| if( argc < 5 )
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| {
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| std::cout <<"Requires 4 arguments: " << std::endl;
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| std::cout <<"1-Input file name " << std::endl;
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| std::cout <<"2-Border Type" << std::endl;
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| std::cout <<" * 0: SQUARE" << std::endl;
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| std::cout <<" * 1: DISK" << std::endl;
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| std::cout <<"3-CoefficientType Type" << std::endl;
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| std::cout <<" * 0: OnesMatrixCoefficients" << std::endl;
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| std::cout <<" * 1: InverseEuclideanDistanceMatrixCoefficients" << std::endl;
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| std::cout <<" * 2: ConformalMatrixCoefficients" << std::endl;
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| std::cout <<" * 3: AuthalicMatrixCoefficients" << std::endl;
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| std::cout <<" * 4: HarmonicMatrixCoefficients" << std::endl;
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| std::cout <<"4-Output file name " << std::endl;
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| return EXIT_FAILURE;
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| }
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| // ** TYPEDEF **
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| typedef double Coord;
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| typedef itk::QuadEdgeMesh< Coord, 3 > MeshType;
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| typedef itk::VTKPolyDataReader< MeshType > ReaderType;
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| typedef itk::VTKPolyDataWriter< MeshType > WriterType;
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| typedef itk::BorderQuadEdgeMeshFilter< MeshType, MeshType > BorderTransformType;
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| typedef VNLIterativeSparseSolverTraits< Coord > SolverTraits;
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| typedef itk::ParameterizationQuadEdgeMeshFilter< MeshType, MeshType, SolverTraits > ParametrizationType;
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| // ** READ THE FILE IN **
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| ReaderType::Pointer reader = ReaderType::New( );
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| reader->SetFileName( argv[1] );
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| try
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| {
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| reader->Update( );
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| }
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| catch( itk::ExceptionObject & excp )
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| {
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| std::cerr << "Exception thrown while reading the input file " << std::endl;
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| std::cerr << excp << std::endl;
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| return EXIT_FAILURE;
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| }
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| MeshType::Pointer mesh = reader->GetOutput( );
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| // ** CHOSE< COMPUTE AND SET BORDER TRANSFORM **
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| BorderTransformType::Pointer border_transform = BorderTransformType::New( );
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| border_transform->SetInput( mesh );
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| // two following line for coverage
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| border_transform->SetRadius( border_transform->GetRadius() );
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| int border;
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| std::stringstream ssout( argv[2] );
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| ssout >>border;
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| switch( border ) // choose border type
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| {
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| case 0: // square shaped domain
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| border_transform->SetTransformType( BorderTransformType::SQUARE_BORDER_TRANSFORM );
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| break;
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| case 1: // disk shaped domain
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| border_transform->SetTransformType( BorderTransformType::DISK_BORDER_TRANSFORM );
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| break;
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| default: // handle .... user ....
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| std::cerr << "2nd argument must be " << std::endl;
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| std::cerr << "0 for SQUARE BORDER TRANSFORM or "
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| << "1 for DISK BORDER TRANSFORM" << std::endl;
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| return EXIT_FAILURE;
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| }
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| std::cout << "Transform type is: " << border_transform->GetTransformType( );
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| std::cout << std::endl;
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| // ** CHOOSE AND SET BARYCENTRIC WEIGHTS **
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| itk::OnesMatrixCoefficients< MeshType > coeff0;
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| itk::InverseEuclideanDistanceMatrixCoefficients< MeshType > coeff1;
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| itk::ConformalMatrixCoefficients< MeshType > coeff2;
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| itk::AuthalicMatrixCoefficients< MeshType > coeff3;
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| itk::HarmonicMatrixCoefficients< MeshType > coeff4;
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| ParametrizationType::Pointer param = ParametrizationType::New( );
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| param->SetInput( mesh );
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| param->SetBorderTransform( border_transform );
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| int param_type;
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| std::stringstream ssout3( argv[3] );
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| ssout3 >> param_type;
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| switch( param_type )
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| {
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| case 0:
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| param->SetCoefficientsMethod( &coeff0 );
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| break;
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| case 1:
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| param->SetCoefficientsMethod( &coeff1 );
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| break;
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| case 2:
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| param->SetCoefficientsMethod( &coeff2 );
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| break;
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| case 3:
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| param->SetCoefficientsMethod( &coeff3 );
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| break;
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| case 4:
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| param->SetCoefficientsMethod( &coeff4 );
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| break;
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| default:
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| std::cerr << "3rd argument must be " << std::endl;
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| std::cerr << "0, 1, 2, 3 or 4" << std::endl;
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| std::cerr << "Here it is: " << param_type << std::endl;
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| return EXIT_FAILURE;
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| }
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| // ** PROCESS **
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| param->Update( );
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| MeshType::Pointer output = param->GetOutput( );
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| // ** WRITE OUTPUT **
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| WriterType::Pointer writer = WriterType::New( );
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| writer->SetInput( param->GetOutput( ) );
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| writer->SetFileName( argv[4] );
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| writer->Update( );
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| // ** PRINT **
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| std::cout << "BorderTransform: \n" << border_transform;
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| std::cout << "Parametrization: \n" << param;
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| return EXIT_SUCCESS;
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| }
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| </source>
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| {{ITKCMakeLists|{{SUBPAGENAME}}}}
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