PolygonalSurfacePointPlacer
VTKExamples/Cxx/PolyData/PolygonalSurfacePointPlacer
Description¶
This example demonstrates how to draw curves on a surface.
Code¶
PolygonalSurfacePointPlacer.cxx
#include <vtkSmartPointer.h> #include <vtkCommand.h> #include <vtkProperty.h> #include <vtkContourWidget.h> #include <vtkSphereSource.h> #include <vtkPolyDataMapper.h> #include <vtkActor.h> #include <vtkRenderer.h> #include <vtkRenderWindow.h> #include <vtkRenderWindowInteractor.h> #include <vtkPolyDataCollection.h> #include <vtkPolygonalSurfacePointPlacer.h> #include <vtkOrientedGlyphContourRepresentation.h> class MyCallback : public vtkCommand { public: static MyCallback *New() { return new MyCallback; } MyCallback(){} virtual void Execute(vtkObject *caller, unsigned long, void*) { vtkContourWidget *contourWidget = reinterpret_cast<vtkContourWidget*>(caller); vtkContourRepresentation* rep = static_cast<vtkContourRepresentation *>(contourWidget->GetRepresentation()); std::cout << "There are " << rep->GetNumberOfNodes() << " nodes." << std::endl; } void SetSphereSource(vtkSmartPointer<vtkSphereSource> sphere) {this->SphereSource = sphere;} private: vtkSmartPointer<vtkSphereSource> SphereSource; }; int main(int, char *[]) { vtkSmartPointer<vtkSphereSource> sphereSource = vtkSmartPointer<vtkSphereSource>::New(); sphereSource->SetRadius(5); sphereSource->Update(); vtkSmartPointer<vtkPolyDataMapper> mapper = vtkSmartPointer<vtkPolyDataMapper>::New(); mapper->SetInputConnection(sphereSource->GetOutputPort()); vtkSmartPointer<vtkActor> actor = vtkSmartPointer<vtkActor>::New(); actor->SetMapper(mapper); // Create the RenderWindow, Renderer vtkSmartPointer<vtkRenderer> renderer = vtkSmartPointer<vtkRenderer>::New(); vtkSmartPointer<vtkRenderWindow> renderWindow = vtkSmartPointer<vtkRenderWindow>::New(); renderWindow->AddRenderer(renderer); vtkSmartPointer<vtkRenderWindowInteractor> interactor = vtkSmartPointer<vtkRenderWindowInteractor>::New(); interactor->SetRenderWindow(renderWindow); renderer->AddActor(actor); vtkSmartPointer<vtkContourWidget> contourWidget = vtkSmartPointer<vtkContourWidget>::New(); contourWidget->SetInteractor(interactor); vtkSmartPointer<MyCallback> callback = vtkSmartPointer<MyCallback>::New(); callback->SetSphereSource(sphereSource); contourWidget->AddObserver(vtkCommand::InteractionEvent,callback); vtkOrientedGlyphContourRepresentation* rep = vtkOrientedGlyphContourRepresentation::SafeDownCast( contourWidget->GetRepresentation()); vtkSmartPointer<vtkPolygonalSurfacePointPlacer> pointPlacer = vtkSmartPointer<vtkPolygonalSurfacePointPlacer>::New(); pointPlacer->AddProp(actor); pointPlacer->GetPolys()->AddItem(sphereSource->GetOutput()); rep->GetLinesProperty()->SetColor(1, 0, 0); rep->GetLinesProperty()->SetLineWidth(3.0); rep->SetPointPlacer(pointPlacer); contourWidget->EnabledOn(); renderer->ResetCamera(); renderWindow->Render(); interactor->Initialize(); interactor->Start(); return EXIT_SUCCESS; }
CMakeLists.txt¶
cmake_minimum_required(VERSION 2.8) PROJECT(PolygonalSurfacePointPlacer) find_package(VTK REQUIRED) include(${VTK_USE_FILE}) add_executable(PolygonalSurfacePointPlacer MACOSX_BUNDLE PolygonalSurfacePointPlacer.cxx) target_link_libraries(PolygonalSurfacePointPlacer ${VTK_LIBRARIES})
Download and Build PolygonalSurfacePointPlacer¶
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 PolygonalSurfacePointPlacer and its CMakeLists.txt file. Once the tarball PolygonalSurfacePointPlacer.tar has been downloaded and extracted,
cd PolygonalSurfacePointPlacer/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:
./PolygonalSurfacePointPlacer
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.