VTK/Examples/Cxx/PolyData/GetMiscCellData

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This demo reads the file Test.vtp that was created in this example http://www.vtk.org/Wiki/Add_Miscellaneous_Data_to_Cells_in_a_Polydata and retrieves the double that we attached to the triangle.

GetMiscCellData.cxx

#include <vtkSmartPointer.h>
#include <vtkCellData.h>
#include <vtkCellArray.h>
#include <vtkDoubleArray.h>
#include <vtkTriangle.h>
#include <vtkPoints.h>
#include <vtkPolyData.h>
#include <vtkXMLPolyDataReader.h>
 
int main(int argc, char *argv[])
{
  if (argc < 2)
    {
    std::cerr << "Usage: " << argv[0] << " InputFileName(.vtp)" << std::endl;
    return EXIT_FAILURE;
    }
  //we will read Test.vtp
  std::string inputFilename = argv[1];
 
  //read the file
  vtkSmartPointer<vtkXMLPolyDataReader> reader = 
    vtkSmartPointer<vtkXMLPolyDataReader>::New();
  reader->SetFileName(inputFilename.c_str());
  reader->Update();
 
  vtkPolyData* polydata = reader->GetOutput();
 
  vtkDoubleArray* triangleArea = vtkDoubleArray::SafeDownCast(polydata->GetCellData()->GetArray("TriangleArea"));
 
  std::cout << "Triangle area: " << triangleArea->GetValue(0) << std::endl;
 
  return EXIT_SUCCESS;
}

CMakeLists.txt

cmake_minimum_required(VERSION 2.8)
 
PROJECT(GetMiscCellData)
 
find_package(VTK REQUIRED)
include(${VTK_USE_FILE})
 
if (APPLE)
  add_executable(GetMiscCellData MACOSX_BUNDLE GetMiscCellData.cxx)
else()
  add_executable(GetMiscCellData GetMiscCellData.cxx)
endif()
 
if(VTK_LIBRARIES)
  target_link_libraries(GetMiscCellData ${VTK_LIBRARIES})
else()
  target_link_libraries(GetMiscCellData vtkHybrid )
endif()
Retrieved from "http://www.vtk.org/Wiki/VTK/Examples/Cxx/PolyData/GetMiscCellData"
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