VTK/Examples/Cxx/Visualization/QuadricLODActor

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VTK Examples Baseline Visualization TestQuadricLODActor.png

If you have a fast graphics card you may not see a difference with the sphere model.

QuadricLODActor.cxx

#include <vtkPolyDataMapper.h>
#include <vtkQuadricLODActor.h>
#include <vtkRenderWindow.h>
#include <vtkRenderer.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkPolyData.h>
#include <vtkProperty.h>
#include <vtkSmartPointer.h>
#include <vtkSphereSource.h>

int main(int, char *[])
{
  // High res sphere
  vtkSmartPointer<vtkSphereSource> highResSphereSource = 
    vtkSmartPointer<vtkSphereSource>::New();
  highResSphereSource->SetThetaResolution(200);
  highResSphereSource->SetPhiResolution(200);
  highResSphereSource->Update();
  
  vtkSmartPointer<vtkPolyDataMapper> highResMapper = 
    vtkSmartPointer<vtkPolyDataMapper>::New();
  highResMapper->SetInputConnection(highResSphereSource->GetOutputPort());
  
  vtkSmartPointer<vtkQuadricLODActor> actor = 
    vtkSmartPointer<vtkQuadricLODActor>::New();
  actor->SetMapper(highResMapper);
  actor->GetProperty()->SetInterpolationToFlat();
  
  // A renderer and render window
  vtkSmartPointer<vtkRenderer> renderer = 
    vtkSmartPointer<vtkRenderer>::New();
  vtkSmartPointer<vtkRenderWindow> renderWindow = 
    vtkSmartPointer<vtkRenderWindow>::New();
  renderWindow->AddRenderer(renderer);

  // An interactor
  vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor = 
    vtkSmartPointer<vtkRenderWindowInteractor>::New();
  renderWindowInteractor->SetRenderWindow(renderWindow);

  renderWindowInteractor->SetDesiredUpdateRate(1e20);
      
  renderer->AddActor(actor);
  renderWindow->Render();
  renderWindowInteractor->Start();
  
  return EXIT_SUCCESS;
}

Please try the new VTKExamples website.

CMakeLists.txt

cmake_minimum_required(VERSION 2.8)

PROJECT(QuadricLODActor)

find_package(VTK REQUIRED)
include(${VTK_USE_FILE})

add_executable(QuadricLODActor MACOSX_BUNDLE QuadricLODActor.cxx)

if(VTK_LIBRARIES)
  target_link_libraries(QuadricLODActor ${VTK_LIBRARIES})
else()
  target_link_libraries(QuadricLODActor vtkHybrid vtkWidgets)
endif()

Download and Build QuadricLODActor

Click here to download QuadricLODActor. and its CMakeLists.txt file.

Once the tarball QuadricLODActor.tar has been downloaded and extracted,

cd QuadricLODActor/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:

./QuadricLODActor

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

Object and background color.