ITK/Examples/Meshes/QuadEdgeMeshParameterizationFilter

This example reads a mesh from a vtk file. It then compute the planar parameterization

The sample sphere file is here.

QuadEdgeMeshParameterizationFilter.cxx

<source lang="cpp">

1. include "itkVTKPolyDataReader.h"
2. include "itkVTKPolyDataWriter.h"
3. include "VNLIterativeSparseSolverTraits.h"
4. include "itkParameterizationQuadEdgeMeshFilter.h"

int main( int argc, char* argv[] ) {

 // ** ERROR MESSAGE AND HELP ** //
 if( argc < 5 )
   {
   std::cout <<"Requires 4 arguments: " << std::endl;
   std::cout <<"1-Input file name " << std::endl;
   std::cout <<"2-Border Type" << std::endl;
   std::cout <<"   * 0: SQUARE" << std::endl;
   std::cout <<"   * 1: DISK" << std::endl;
   std::cout <<"3-CoefficientType Type" << std::endl;
   std::cout <<"   * 0: OnesMatrixCoefficients" << std::endl;
   std::cout <<"   * 1: InverseEuclideanDistanceMatrixCoefficients" << std::endl;
   std::cout <<"   * 2: ConformalMatrixCoefficients" << std::endl;
   std::cout <<"   * 3: AuthalicMatrixCoefficients" << std::endl;
   std::cout <<"   * 4: HarmonicMatrixCoefficients" << std::endl;
   std::cout <<"4-Output file name " << std::endl;

   return EXIT_FAILURE;
   }

 // ** TYPEDEF **
 typedef double Coord;

 typedef itk::QuadEdgeMesh< Coord, 3 >                           MeshType;
 typedef itk::VTKPolyDataReader< MeshType >                      ReaderType;
 typedef itk::VTKPolyDataWriter< MeshType >                      WriterType;
 typedef itk::BorderQuadEdgeMeshFilter< MeshType, MeshType >     BorderTransformType;
 typedef VNLIterativeSparseSolverTraits< Coord >                 SolverTraits;

 typedef itk::ParameterizationQuadEdgeMeshFilter< MeshType, MeshType, SolverTraits >   ParametrizationType;

 // ** READ THE FILE IN **
 ReaderType::Pointer reader = ReaderType::New( );
 reader->SetFileName( argv[1] );

 try
   {
   reader->Update( );
   }
 catch( itk::ExceptionObject & excp )
   {
   std::cerr << "Exception thrown while reading the input file " << std::endl;
   std::cerr << excp << std::endl;
   return EXIT_FAILURE;
   }

 MeshType::Pointer mesh = reader->GetOutput( );

 // ** CHOSE< COMPUTE AND SET BORDER TRANSFORM **
 BorderTransformType::Pointer border_transform = BorderTransformType::New( );
 border_transform->SetInput( mesh );
 // two following line for coverage
 border_transform->SetRadius( border_transform->GetRadius() );

 int border;
 std::stringstream ssout( argv[2] );
 ssout >>border;
 switch( border )  // choose border type
   {
   case 0: // square shaped domain
     border_transform->SetTransformType( BorderTransformType::SQUARE_BORDER_TRANSFORM );
     break;
   case 1: // disk shaped domain
     border_transform->SetTransformType( BorderTransformType::DISK_BORDER_TRANSFORM );
     break;
   default: // handle .... user ....
     std::cerr << "2nd argument must be " << std::endl;
     std::cerr << "0 for SQUARE BORDER TRANSFORM or "
               << "1 for DISK BORDER TRANSFORM" << std::endl;
     return EXIT_FAILURE;
   }
 std::cout << "Transform type is: " << border_transform->GetTransformType( );
 std::cout << std::endl;

 // ** CHOOSE AND SET BARYCENTRIC WEIGHTS **
 itk::OnesMatrixCoefficients< MeshType >                     coeff0;
 itk::InverseEuclideanDistanceMatrixCoefficients< MeshType > coeff1;
 itk::ConformalMatrixCoefficients< MeshType >                coeff2;
 itk::AuthalicMatrixCoefficients< MeshType >                 coeff3;
 itk::HarmonicMatrixCoefficients< MeshType >                 coeff4;

 ParametrizationType::Pointer param = ParametrizationType::New( );
 param->SetInput( mesh );
 param->SetBorderTransform( border_transform );

 int param_type;
 std::stringstream ssout3( argv[3] );
 ssout3 >> param_type;

 switch( param_type )
   {
   case 0:
     param->SetCoefficientsMethod( &coeff0 );
     break;
   case 1:
     param->SetCoefficientsMethod( &coeff1 );
     break;
   case 2:
     param->SetCoefficientsMethod( &coeff2 );
     break;
   case 3:
     param->SetCoefficientsMethod( &coeff3 );
     break;
   case 4:
     param->SetCoefficientsMethod( &coeff4 );
     break;
   default:
     std::cerr << "3rd argument must be " << std::endl;
     std::cerr << "0, 1, 2, 3 or 4" << std::endl;
     std::cerr << "Here it is: " << param_type << std::endl;
     return EXIT_FAILURE;
   }

 // ** PROCESS **
 param->Update( );
 MeshType::Pointer output = param->GetOutput( );

 // ** WRITE OUTPUT **
 WriterType::Pointer writer = WriterType::New( );
 writer->SetInput( param->GetOutput( ) );
 writer->SetFileName( argv[4] );
 writer->Update( );

 // ** PRINT **
 std::cout << "BorderTransform: \n" << border_transform;
 std::cout << "Parametrization: \n" << param;

 return EXIT_SUCCESS;

} </source>

CMakeLists.txt

<syntaxhighlight lang="cmake"> cmake_minimum_required(VERSION 3.9.5)

project(QuadEdgeMeshParameterizationFilter)

find_package(ITK REQUIRED) include(${ITK_USE_FILE}) if (ITKVtkGlue_LOADED)

 find_package(VTK REQUIRED)
 include(${VTK_USE_FILE})

endif()

add_executable(QuadEdgeMeshParameterizationFilter MACOSX_BUNDLE QuadEdgeMeshParameterizationFilter.cxx)

if( "${ITK_VERSION_MAJOR}" LESS 4 )

 target_link_libraries(QuadEdgeMeshParameterizationFilter ITKReview ${ITK_LIBRARIES})

else( "${ITK_VERSION_MAJOR}" LESS 4 )

 target_link_libraries(QuadEdgeMeshParameterizationFilter ${ITK_LIBRARIES})

endif( "${ITK_VERSION_MAJOR}" LESS 4 )

</syntaxhighlight>

Download and Build QuadEdgeMeshParameterizationFilter

Click here to download QuadEdgeMeshParameterizationFilter and its CMakeLists.txt file. Once the tarball QuadEdgeMeshParameterizationFilter.tar has been downloaded and extracted,

cd QuadEdgeMeshParameterizationFilter/build

• If ITK is installed:

cmake ..

• If ITK is not installed but compiled on your system, you will need to specify the path to your ITK build:

cmake -DITK_DIR:PATH=/home/me/itk_build ..

Build the project:

make

and run it:

./QuadEdgeMeshParameterizationFilter

WINDOWS USERS PLEASE NOTE: Be sure to add the ITK bin directory to your path. This will resolve the ITK dll's at run time.

Building All of the Examples

Many of the examples in the ITK Wiki Examples Collection require VTK. You can build all of the the examples by following these instructions. If you are a new VTK user, you may want to try the Superbuild which will build a proper ITK and VTK.

ItkVtkGlue

ITK >= 4

For examples that use QuickView (which depends on VTK), you must have built ITK with Module_ITKVtkGlue=ON.

ITK < 4

Some of the ITK Examples require VTK to display the images. If you download the entire ITK Wiki Examples Collection, the ItkVtkGlue directory will be included and configured. If you wish to just build a few examples, then you will need to download ItkVtkGlue and build it. When you run cmake it will ask you to specify the location of the ItkVtkGlue binary directory.