ClipClosedSurface

VTKExamples/Cxx/Meshes/ClipClosedSurface

Question

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Code

ClipClosedSurface.cxx

#include <vtkSmartPointer.h>

#include <vtkRenderWindowInteractor.h>
#include <vtkRenderWindow.h>
#include <vtkRenderer.h>
#include <vtkActor.h>
#include <vtkCamera.h>
#include <vtkDataSetMapper.h>
#include <vtkPolyData.h>
#include <vtkActor.h>
#include <vtkProperty.h>
#include <vtkClipClosedSurface.h>
#include <vtkPlane.h>
#include <vtkPlaneCollection.h>
#include <vtkXMLPolyDataReader.h>

#include <vtkSphereSource.h>

//
// Demonstrate the use of clipping of polygonal data
//

int main (int argc, char *argv[])
{
  // PolyData to process
  vtkSmartPointer<vtkPolyData> polyData;

  if (argc > 1)
  {
    vtkSmartPointer<vtkXMLPolyDataReader> reader =
      vtkSmartPointer<vtkXMLPolyDataReader>::New();
    reader->SetFileName(argv[1]);
    reader->Update();
    polyData = reader->GetOutput();
  }
  else
  {
    // Create a sphere
    vtkSmartPointer<vtkSphereSource> sphereSource =
      vtkSmartPointer<vtkSphereSource>::New();
    sphereSource->SetThetaResolution(20);
    sphereSource->SetPhiResolution(11);
    sphereSource->Update();

    polyData = sphereSource->GetOutput();
  }

  double *center = polyData->GetCenter();
  vtkSmartPointer<vtkPlane> plane1 =
    vtkSmartPointer<vtkPlane>::New();
  plane1->SetOrigin(center[0], center[1], center[2]);
  plane1->SetNormal(0.0, -1.0, 0.0);
  vtkSmartPointer<vtkPlane> plane2 =
    vtkSmartPointer<vtkPlane>::New();
  plane2->SetOrigin(center[0], center[1], center[2]);
  plane2->SetNormal(0.0, 0.0, 1.0);
  vtkSmartPointer<vtkPlane> plane3 =
    vtkSmartPointer<vtkPlane>::New();
  plane3->SetOrigin(center[0], center[1], center[2]);
  plane3->SetNormal(-1.0, 0.0, 0.0);

  vtkSmartPointer<vtkPlaneCollection> planes =
    vtkSmartPointer<vtkPlaneCollection>::New();
  planes->AddItem(plane1);
  planes->AddItem(plane2);
  planes->AddItem(plane3);

  vtkSmartPointer<vtkClipClosedSurface> clipper =
    vtkSmartPointer<vtkClipClosedSurface>::New();
  clipper->SetInputData(polyData);
  clipper->SetClippingPlanes(planes);
  clipper->SetActivePlaneId(2);
  clipper->SetScalarModeToColors();
  clipper->SetClipColor(0.8900, 0.8100, 0.3400); // banana
  clipper->SetBaseColor(1.0000, 0.3882, 0.2784); // tomato
  clipper->SetActivePlaneColor(0.6400, 0.5800, 0.5000); // beige

  vtkSmartPointer<vtkDataSetMapper> clipMapper =
    vtkSmartPointer<vtkDataSetMapper>::New();
  clipMapper->SetInputConnection(clipper->GetOutputPort());

  vtkSmartPointer<vtkActor> clipActor =
    vtkSmartPointer<vtkActor>::New();
  clipActor->SetMapper(clipMapper);
  clipActor->GetProperty()->SetColor(1.0000,0.3882,0.2784);
  clipActor->GetProperty()->SetInterpolationToFlat();

  // Create graphics stuff
  //
  vtkSmartPointer<vtkRenderer> ren1 =
    vtkSmartPointer<vtkRenderer>::New();
  ren1->SetBackground(.3, .4, .6);

  vtkSmartPointer<vtkRenderWindow> renWin =
    vtkSmartPointer<vtkRenderWindow>::New();
  renWin->AddRenderer(ren1);
  renWin->SetSize(512,512);

  vtkSmartPointer<vtkRenderWindowInteractor> iren =
    vtkSmartPointer<vtkRenderWindowInteractor>::New();
  iren->SetRenderWindow(renWin);

  // Add the actors to the renderer, set the background and size
  //
  ren1->AddActor(clipActor);

  // Generate an interesting view
  //
  ren1->ResetCamera();
  ren1->GetActiveCamera()->Azimuth(120);
  ren1->GetActiveCamera()->Elevation(30);
  ren1->GetActiveCamera()->Dolly(1.0);
  ren1->ResetCameraClippingRange();

  renWin->Render();
  iren->Initialize();
  iren->Start();

  return EXIT_SUCCESS;
}

CMakeLists.txt

cmake_minimum_required(VERSION 3.3 FATAL_ERROR)

project(ClipClosedSurface)

find_package(VTK COMPONENTS 
  vtkCommonCore
  vtkCommonDataModel
  vtkFiltersGeneral
  vtkFiltersSources
  vtkIOXML
  vtkInteractionStyle
  vtkRenderingContextOpenGL2
  vtkRenderingCore
  vtkRenderingFreeType
  vtkRenderingGL2PSOpenGL2
  vtkRenderingOpenGL2 QUIET)
if (NOT VTK_FOUND)
  message("Skipping ClipClosedSurface: ${VTK_NOT_FOUND_MESSAGE}")
  return ()
endif()
message (STATUS "VTK_VERSION: ${VTK_VERSION}")
if (VTK_VERSION VERSION_LESS "8.90.0")
  # old system
  include(${VTK_USE_FILE})
  add_executable(ClipClosedSurface MACOSX_BUNDLE ClipClosedSurface.cxx )
  target_link_libraries(ClipClosedSurface PRIVATE ${VTK_LIBRARIES})
else ()
  # include all components
  add_executable(ClipClosedSurface MACOSX_BUNDLE ClipClosedSurface.cxx )
  target_link_libraries(ClipClosedSurface PRIVATE ${VTK_LIBRARIES})
  # vtk_module_autoinit is needed
  vtk_module_autoinit(
    TARGETS ClipClosedSurface
    MODULES ${VTK_LIBRARIES}
    )
endif ()

Download and Build ClipClosedSurface

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

cd ClipClosedSurface/build

If VTK is installed:

cmake ..

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

cmake -DVTK_DIR:PATH=/home/me/vtk_build ..

Build the project:

make

and run it:

./ClipClosedSurface

WINDOWS USERS

Be sure to add the VTK bin directory to your path. This will resolve the VTK dll's at run time.