WarpScalar
VTKExamples/Cxx/PolyData/WarpScalar
Code¶
WarpScalar.cxx
#include <vtkActor.h> #include <vtkDoubleArray.h> #include <vtkPointData.h> #include <vtkPolyData.h> #include <vtkPolyDataMapper.h> #include <vtkRenderer.h> #include <vtkRenderWindow.h> #include <vtkRenderWindowInteractor.h> #include <vtkSmartPointer.h> #include <vtkSphereSource.h> #include <vtkWarpScalar.h> #include <vtkMath.h> int main(int, char *[]) { // Create a sphere vtkSmartPointer<vtkSphereSource> sphereSource = vtkSmartPointer<vtkSphereSource>::New(); sphereSource->Update(); // Create Scalars vtkSmartPointer<vtkDoubleArray> scalars = vtkSmartPointer<vtkDoubleArray>::New(); int numberOfPoints = sphereSource->GetOutput()->GetNumberOfPoints(); scalars->SetNumberOfTuples(numberOfPoints); vtkMath::RandomSeed(8775070); // for reproducibility for(vtkIdType i = 0; i < numberOfPoints; ++i) { scalars->SetTuple1(i, vtkMath::Random(0.0, 1.0 / 7.0)); } sphereSource->GetOutput()->GetPointData()->SetScalars(scalars); vtkSmartPointer<vtkWarpScalar> warpScalar = vtkSmartPointer<vtkWarpScalar>::New(); warpScalar->SetInputConnection(sphereSource->GetOutputPort()); warpScalar->SetScaleFactor(1); // use the scalars themselves // Required for SetNormal to have an effect warpScalar->UseNormalOn(); warpScalar->SetNormal(0, 0, 1); warpScalar->Update(); // Create a mapper and actor vtkSmartPointer<vtkPolyDataMapper> mapper = vtkSmartPointer<vtkPolyDataMapper>::New(); mapper->SetInputConnection(warpScalar->GetOutputPort()); vtkSmartPointer<vtkActor> actor = vtkSmartPointer<vtkActor>::New(); actor->SetMapper(mapper); // Visualize 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(1,1,1); // Background color white renderWindow->Render(); renderWindowInteractor->Start(); return EXIT_SUCCESS; }
CMakeLists.txt¶
cmake_minimum_required(VERSION 2.8) PROJECT(WarpScalar) find_package(VTK REQUIRED) include(${VTK_USE_FILE}) add_executable(WarpScalar MACOSX_BUNDLE WarpScalar.cxx) target_link_libraries(WarpScalar ${VTK_LIBRARIES})
Download and Build WarpScalar¶
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 WarpScalar and its CMakeLists.txt file. Once the tarball WarpScalar.tar has been downloaded and extracted,
cd WarpScalar/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:
./WarpScalar
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.