Difference between revisions of "VTK/Examples/Cxx/Meshes/MatrixMathFilter"

From KitwarePublic
< VTK‎ | Examples‎ | Cxx
Jump to: navigation, search
(Remove vtkTesting.h)
(Replaced content with "= '''See [https://lorensen.github.io/VTKExamples/site/Cxx/Meshes/MatrixMathFilter MatrixMathFilter] on the new [https://lorensen.github.io/VTKExamples/site/ VTKExamples we...")
 
Line 1: Line 1:
<div class="floatcenter">[[File:VTK_Examples_Baseline_Meshes_TestMatrixMathFilter.png]]</div>
+
= '''See [https://lorensen.github.io/VTKExamples/site/Cxx/Meshes/MatrixMathFilter MatrixMathFilter] on the new [https://lorensen.github.io/VTKExamples/site/ VTKExamples website].''' =
==MatrixMathFilter.cxx==
 
<source lang="cpp">
 
#include <vtkSmartPointer.h>
 
#include <vtkPointData.h>
 
#include <vtkSphereSource.h>
 
#include <vtkMatrixMathFilter.h>
 
#include <vtkPolyDataMapper.h>
 
#include <vtkActor.h>
 
#include <vtkRenderWindow.h>
 
#include <vtkRenderer.h>
 
#include <vtkRenderWindowInteractor.h>
 
#include <vtkUnstructuredGridReader.h>
 
#include <vtkDataSetSurfaceFilter.h>
 
#include <vtkXMLUnstructuredGridWriter.h>
 
#include <vtkXMLPolyDataWriter.h>
 
 
 
int main(int argc, char *argv[])
 
{
 
  if(argc < 2)
 
  {
 
    std::cerr << "Required arguments: vtkFile" << std::endl;
 
    return EXIT_FAILURE;
 
  }
 
 
 
  std::string filename = argv[1]; // "/Data/tensors.vtk";
 
 
 
  std::cout << "filename: " << filename << std::endl;
 
 
 
  vtkSmartPointer<vtkUnstructuredGridReader> reader =
 
    vtkSmartPointer<vtkUnstructuredGridReader>::New();
 
  reader->SetFileName(filename.c_str());
 
  reader->Update();
 
 
 
  vtkSmartPointer<vtkDataSetSurfaceFilter> surfaceFilter =
 
    vtkSmartPointer<vtkDataSetSurfaceFilter>::New();
 
  surfaceFilter->SetInputConnection(reader->GetOutputPort());
 
  surfaceFilter->Update();
 
 
 
  vtkSmartPointer<vtkMatrixMathFilter> matrixMathFilter =
 
    vtkSmartPointer<vtkMatrixMathFilter>::New();
 
  //matrixMathFilter->SetOperationToDeterminant();
 
  matrixMathFilter->SetOperationToEigenvalue();
 
  matrixMathFilter->SetInputConnection(surfaceFilter->GetOutputPort());
 
  matrixMathFilter->Update();
 
  matrixMathFilter->GetOutput()->GetPointData()->SetActiveScalars("Eigenvalue");
 
 
 
  vtkSmartPointer<vtkXMLPolyDataWriter> writer = vtkSmartPointer<vtkXMLPolyDataWriter>::New();
 
  writer->SetInputConnection(matrixMathFilter->GetOutputPort());
 
  writer->SetFileName("output.vtp");
 
  writer->Write();
 
 
 
  // Visualize
 
  vtkSmartPointer<vtkPolyDataMapper> mapper = vtkSmartPointer<vtkPolyDataMapper>::New();
 
  mapper->SetInputConnection(matrixMathFilter->GetOutputPort());
 
 
 
  vtkSmartPointer<vtkActor> actor = vtkSmartPointer<vtkActor>::New();
 
  actor->SetMapper(mapper);
 
 
 
  vtkSmartPointer<vtkRenderer> renderer = vtkSmartPointer<vtkRenderer>::New();
 
  vtkSmartPointer<vtkRenderWindow> renderWindow = vtkSmartPointer<vtkRenderWindow>::New();
 
  renderWindow->AddRenderer(renderer);
 
  vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor =
 
    vtkSmartPointer<vtkRenderWindowInteractor>::New();
 
  renderWindowInteractor->SetRenderWindow(renderWindow);
 
 
 
  renderer->AddActor(actor);
 
  renderer->SetBackground(.3, .6, .3); // Background color green
 
 
 
  renderWindow->Render();
 
  renderWindowInteractor->Start();
 
 
 
  return EXIT_SUCCESS;
 
}
 
</source>
 
 
 
 
 
{{VTKCMakeLists|{{SUBPAGENAME}}}}
 
 
 
[[Category:VTKAddVisualization]]
 

Latest revision as of 18:58, 27 March 2019

See MatrixMathFilter on the new VTKExamples website.