LODProp3D
VTKExamples/Cxx/Visualization/LODProp3D
Description¶
If you have a fast graphics card, you may not see a difference.
Code¶
LODProp3D.cxx
#include <vtkSmartPointer.h> #include <vtkPolyDataMapper.h> #include <vtkLODProp3D.h> #include <vtkRenderWindow.h> #include <vtkRenderer.h> #include <vtkRenderWindowInteractor.h> #include <vtkPolyData.h> #include <vtkSphereSource.h> #include <vtkCallbackCommand.h> #include <vtkProperty.h> void RefreshCallback( vtkObject* vtkNotUsed(caller), long unsigned int vtkNotUsed(eventId), void* clientData, void* vtkNotUsed(callData) ) { vtkSmartPointer<vtkLODProp3D> lodProp = static_cast<vtkLODProp3D*>(clientData); std::cout << "Last rendered LOD: " << lodProp->GetLastRenderedLODID() << std::endl; } int main (int, char *[]) { // High res sphere vtkSmartPointer<vtkSphereSource> highResSphereSource = vtkSmartPointer<vtkSphereSource>::New(); int res = 100; highResSphereSource->SetThetaResolution(res); highResSphereSource->SetPhiResolution(res); highResSphereSource->Update(); vtkSmartPointer<vtkPolyDataMapper> highResMapper = vtkSmartPointer<vtkPolyDataMapper>::New(); highResMapper->SetInputConnection(highResSphereSource->GetOutputPort()); // Low res sphere vtkSmartPointer<vtkSphereSource> lowResSphereSource = vtkSmartPointer<vtkSphereSource>::New(); vtkSmartPointer<vtkPolyDataMapper> lowResMapper = vtkSmartPointer<vtkPolyDataMapper>::New(); lowResMapper->SetInputConnection(lowResSphereSource->GetOutputPort()); vtkSmartPointer<vtkProperty> propertyLowRes = vtkSmartPointer<vtkProperty>::New(); propertyLowRes->SetDiffuseColor(0.89, 0.81, 0.34); propertyLowRes->SetInterpolationToFlat(); vtkSmartPointer<vtkProperty> propertyHighRes = vtkSmartPointer<vtkProperty>::New(); propertyHighRes->SetDiffuseColor(1.0, 0.3882, 0.2784); propertyHighRes->SetInterpolationToFlat(); vtkSmartPointer<vtkLODProp3D> prop = vtkSmartPointer<vtkLODProp3D>::New(); prop->AddLOD(lowResMapper, propertyLowRes, 0.0); prop->AddLOD(highResMapper, propertyHighRes, 0.0); std::cout << "There are " << prop->GetNumberOfLODs() << " LODs" << std::endl; // A renderer and render window vtkSmartPointer<vtkRenderer> renderer = vtkSmartPointer<vtkRenderer>::New(); vtkSmartPointer<vtkRenderWindow> renderWindow = vtkSmartPointer<vtkRenderWindow>::New(); renderWindow->AddRenderer(renderer); //prop->SetAllocatedRenderTime(1e-6,renderer); prop->SetAllocatedRenderTime(1e-10,renderer); // An interactor vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor = vtkSmartPointer<vtkRenderWindowInteractor>::New(); renderWindowInteractor->SetRenderWindow(renderWindow); // Add the actors to the scene renderer->AddActor(prop); vtkSmartPointer<vtkCallbackCommand> refreshCallback = vtkSmartPointer<vtkCallbackCommand>::New(); refreshCallback->SetCallback (RefreshCallback); refreshCallback->SetClientData(prop); renderWindow->AddObserver(vtkCommand::ModifiedEvent,refreshCallback); renderWindow->Render(); // Begin mouse interaction renderWindowInteractor->Start(); return EXIT_SUCCESS; }
CMakeLists.txt¶
cmake_minimum_required(VERSION 2.8) PROJECT(LODProp3D) find_package(VTK REQUIRED) include(${VTK_USE_FILE}) add_executable(LODProp3D MACOSX_BUNDLE LODProp3D.cxx) target_link_libraries(LODProp3D ${VTK_LIBRARIES})
Download and Build LODProp3D¶
Danger
The generation of tar files has not been ported to the new VTKExamples. Some tarballs may be missing or out-of-date.
Click here to download LODProp3D and its CMakeLists.txt file. Once the tarball LODProp3D.tar has been downloaded and extracted,
cd LODProp3D/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:
./LODProp3D
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.