ProjectSphere
VTKExamples/Cxx/Visualization/ProjectSphere
Code¶
ProjectSphere.cxx
#include <vtkSmartPointer.h> #include <vtkProjectSphereFilter.h> #include <vtkElevationFilter.h> #include <vtkParametricSuperEllipsoid.h> #include <vtkParametricFunctionSource.h> #include <vtkPolyDataMapper.h> #include "vtkCamera.h" #include <vtkActor.h> #include <vtkRenderWindow.h> #include <vtkRenderer.h> #include <vtkRenderWindowInteractor.h> #include <vtkPolyData.h> #include <vtkPointData.h> int main (int, char *[]) { vtkSmartPointer<vtkParametricSuperEllipsoid> surface = vtkSmartPointer<vtkParametricSuperEllipsoid>::New(); surface->SetN1(2.0); surface->SetN2(0.5); vtkSmartPointer<vtkParametricFunctionSource> source = vtkSmartPointer<vtkParametricFunctionSource>::New(); source->SetParametricFunction(surface); vtkSmartPointer<vtkElevationFilter> elevationFilter = vtkSmartPointer<vtkElevationFilter>::New(); elevationFilter->SetInputConnection(source->GetOutputPort()); elevationFilter->SetLowPoint(0.0, 0.0, -4.0); elevationFilter->SetHighPoint(0.0, 0.0, 4.0); elevationFilter->Update(); // Deep copy the point data since in some versions of VTK, // the ProjectSphereFilter modifies the input point data vtkSmartPointer<vtkPolyData> pd1 = vtkSmartPointer<vtkPolyData>::New(); pd1->DeepCopy(elevationFilter->GetOutput()); vtkSmartPointer<vtkProjectSphereFilter> sphereProject1 = vtkSmartPointer<vtkProjectSphereFilter>::New(); sphereProject1->SetInputConnection(elevationFilter->GetOutputPort()); sphereProject1->Update(); vtkSmartPointer<vtkPolyDataMapper> mapper1 = vtkSmartPointer<vtkPolyDataMapper>::New(); mapper1->SetInputConnection(sphereProject1->GetOutputPort()); mapper1->SetScalarRange(sphereProject1->GetOutput()->GetPointData()->GetScalars()->GetRange()); vtkSmartPointer<vtkActor> actor1 = vtkSmartPointer<vtkActor>::New(); actor1->SetMapper(mapper1); vtkSmartPointer<vtkPolyDataMapper> mapper2 = vtkSmartPointer<vtkPolyDataMapper>::New(); mapper2->SetInputData(pd1); mapper2->SetScalarRange(pd1->GetPointData()->GetScalars()->GetRange()); vtkSmartPointer<vtkActor> actor2 = vtkSmartPointer<vtkActor>::New(); actor2->SetMapper(mapper2); // A render window vtkSmartPointer<vtkRenderWindow> renderWindow = vtkSmartPointer<vtkRenderWindow>::New(); // Define viewport ranges // (xmin, ymin, xmax, ymax) double leftViewport[4] = {0.0, 0.0, 0.5, 1.0}; double rightViewport[4] = {0.5, 0.0, 1.0, 1.0}; // Setup both renderers vtkSmartPointer<vtkRenderer> leftRenderer = vtkSmartPointer<vtkRenderer>::New(); renderWindow->AddRenderer(leftRenderer); leftRenderer->SetViewport(leftViewport); leftRenderer->SetBackground(.6, .5, .4); vtkSmartPointer<vtkRenderer> rightRenderer = vtkSmartPointer<vtkRenderer>::New(); renderWindow->AddRenderer(rightRenderer); rightRenderer->SetViewport(rightViewport); rightRenderer->SetBackground(.4, .5, .6); leftRenderer->AddActor(actor2); rightRenderer->AddActor(actor1); // An interactor vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor = vtkSmartPointer<vtkRenderWindowInteractor>::New(); renderWindowInteractor->SetRenderWindow(renderWindow); leftRenderer->GetActiveCamera()->Azimuth(30); leftRenderer->GetActiveCamera()->Elevation(-30); leftRenderer->ResetCamera(); // Render an image (lights and cameras are created automatically) renderWindow->SetSize(640, 480); renderWindow->Render(); // Begin mouse interaction renderWindowInteractor->Start(); return EXIT_SUCCESS; }
CMakeLists.txt¶
cmake_minimum_required(VERSION 2.8) PROJECT(ProjectSphere) find_package(VTK REQUIRED) include(${VTK_USE_FILE}) add_executable(ProjectSphere MACOSX_BUNDLE ProjectSphere.cxx) target_link_libraries(ProjectSphere ${VTK_LIBRARIES})
Download and Build ProjectSphere¶
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 ProjectSphere and its CMakeLists.txt file. Once the tarball ProjectSphere.tar has been downloaded and extracted,
cd ProjectSphere/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:
./ProjectSphere
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.