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| This example reads a mesh from a vtk file. It then compute normals for the mesh.
| | {{warning|1=The media wiki content on this page is no longer maintained.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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| ==QuadEdgeMeshNormalFilter.cxx==
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| <source lang="cpp">
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| #include "itkVector.h"
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| #include "itkQuadEdgeMesh.h"
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| #include "itkVTKPolyDataReader.h"
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| #include "itkQuadEdgeMeshExtendedTraits.h"
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| #include "itkQuadEdgeMeshNormalFilter.h"
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| #include <stdlib.h>
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| int main( int argc, char* argv[] )
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| {
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| if( argc < 2 )
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| {
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| std::cout <<"This program requires at least 1 argument" <<std::endl;
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| std::cout <<"1- Input filename" <<std::endl;
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| std::cout <<"2- Weight type" <<std::endl;
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| std::cout <<" * 0: GOURAUD" <<std::endl;
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| std::cout <<" * 1: THURMER" <<std::endl;
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| std::cout <<" * 2: AREA" <<std::endl;
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| return EXIT_FAILURE;
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| }
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| const unsigned int Dimension = 3;
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| typedef double CoordType;
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| typedef itk::QuadEdgeMesh< CoordType, Dimension > InputMeshType;
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| typedef itk::Vector< CoordType, Dimension > VectorType;
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| typedef itk::QuadEdgeMeshExtendedTraits <
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| VectorType,
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| Dimension,
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| 2,
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| CoordType,
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| CoordType,
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| VectorType,
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| bool,
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| bool > Traits;
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| typedef itk::QuadEdgeMesh < VectorType, Dimension, Traits > OutputMeshType;
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| typedef itk::VTKPolyDataReader< InputMeshType > ReaderType;
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| typedef itk::QuadEdgeMeshNormalFilter< InputMeshType, OutputMeshType > NormalFilterType;
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| NormalFilterType::WeightType weight_type;
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| int param = atoi( argv[2] );
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| if( ( param < 0 ) || ( param > 2 ) )
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| {
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| std::cout <<"Weight type must be either: " <<std::endl;
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| std::cout <<" * 0: GOURAUD" <<std::endl;
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| std::cout <<" * 1: THURMER" <<std::endl;
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| std::cout <<" * 2: AREA" <<std::endl;
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| return EXIT_FAILURE;
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| }
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| else
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| {
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| switch( param )
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| {
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| default:
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| case 0:
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| weight_type = NormalFilterType::GOURAUD;
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| break;
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| case 1:
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| weight_type = NormalFilterType::THURMER;
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| break;
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| case 2:
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| weight_type = NormalFilterType::AREA;
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| break;
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| }
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| }
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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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| InputMeshType::Pointer mesh = reader->GetOutput( );
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| NormalFilterType::Pointer normals = NormalFilterType::New( );
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| normals->SetInput( mesh );
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| normals->SetWeight( weight_type );
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| try
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| {
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| normals->Update( );
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| }
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| catch( itk::ExceptionObject & excp )
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| {
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| std::cerr << excp << std::endl;
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| return EXIT_FAILURE;
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| }
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| OutputMeshType::Pointer output = normals->GetOutput( );
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| std::cout << normals << std::endl;
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| return EXIT_SUCCESS;
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| }
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| </source>
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| | |
| ==CMakeLists.txt==
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| <source lang="cmake">
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| cmake_minimum_required(VERSION 2.6)
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|
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| PROJECT(QuadEdgeMeshNormalFilter)
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|
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| FIND_PACKAGE(ITK REQUIRED)
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| INCLUDE(${ITK_USE_FILE})
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|
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| ADD_EXECUTABLE(QuadEdgeMeshNormalFilter QuadEdgeMeshNormalFilter.cxx)
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| TARGET_LINK_LIBRARIES(QuadEdgeMeshNormalFilter ITKAlgorithms)
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| </source>
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