VTK/Examples/Cxx/Meshes/BoundaryEdges

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Revision as of 22:18, 12 December 2009 by Daviddoria (talk | contribs)
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This filter will extract the boundary edges of a mesh. An example file is here. This is a 10x10 grid which forms a plane. The boundary edges are the outside edge of the plane only.

BoundaryEdges.cxx

#include <vtkSmartPointer.h>
#include <vtkPolyData.h>
#include <vtkXMLPolyDataReader.h>
#include <vtkXMLPolyDataWriter.h>
#include <vtkFeatureEdges.h>

int main(int argc, char *argv[])
{
  if(argc != 3)
    {
    vtkstd::cout << "Required arguments: InputFilename OutputFilename" << vtkstd::endl;
    exit(-1);
    }
  
  vtkstd::string inputFilename = argv[1];
  vtkstd::string outputFilename = argv[2];
  
  vtkSmartPointer<vtkXMLPolyDataReader> reader = vtkSmartPointer<vtkXMLPolyDataReader>::New();
  reader->SetFileName(inputFilename.c_str());
  reader->Update();
  
  vtkSmartPointer<vtkFeatureEdges> featureEdges = vtkSmartPointer<vtkFeatureEdges>::New();
  featureEdges->SetInput(reader->GetOutput());
  featureEdges->BoundaryEdgesOn();
  featureEdges->FeatureEdgesOff();
  featureEdges->ManifoldEdgesOff();
  featureEdges->NonManifoldEdgesOff();
  
  vtkSmartPointer<vtkXMLPolyDataWriter> writer = vtkSmartPointer<vtkXMLPolyDataWriter>::New();
  writer->SetFileName(outputFilename.c_str());
  writer->SetInput(featureEdges->GetOutput());
  writer->Write();
  
  return 0;
}

==CMakeLists.txt

cmake_minimum_required(VERSION 2.6)

PROJECT(BoundaryEdges)

FIND_PACKAGE(VTK REQUIRED)
INCLUDE(${VTK_USE_FILE})

ADD_EXECUTABLE(BoundaryEdges BoundaryEdges.cxx)
TARGET_LINK_LIBRARIES(BoundaryEdges vtkHybrid)