LogoWidget
VTKExamples/Cxx/Widgets/LogoWidget
Description¶
Turn the widget on before the render. Otherwise, it won't appear until you interact with the scene.
Code¶
LogoWidget.cxx
#include <vtkSmartPointer.h> #include <vtkActor.h> #include <vtkImageCanvasSource2D.h> #include <vtkLogoRepresentation.h> #include <vtkLogoWidget.h> #include <vtkPolyData.h> #include <vtkPolyDataMapper.h> #include <vtkProperty2D.h> #include <vtkRenderWindow.h> #include <vtkRenderWindowInteractor.h> #include <vtkRenderer.h> #include <vtkSphereSource.h> #include <vtkSphereSource.h> int main(int, char *[]) { // A sphere vtkSmartPointer<vtkSphereSource> sphereSource = vtkSmartPointer<vtkSphereSource>::New(); sphereSource->SetCenter(0.0, 0.0, 0.0); sphereSource->SetRadius(4.0); sphereSource->SetPhiResolution(4); sphereSource->SetThetaResolution(8); sphereSource->Update(); vtkSmartPointer<vtkPolyDataMapper> mapper = vtkSmartPointer<vtkPolyDataMapper>::New(); mapper->SetInputConnection(sphereSource->GetOutputPort()); vtkSmartPointer<vtkActor> actor = vtkSmartPointer<vtkActor>::New(); actor->SetMapper(mapper); // A renderer and render window vtkSmartPointer<vtkRenderer> renderer = vtkSmartPointer<vtkRenderer>::New(); vtkSmartPointer<vtkRenderWindow> renderWindow = vtkSmartPointer<vtkRenderWindow>::New(); renderWindow->AddRenderer(renderer); renderer->AddActor(actor); // An interactor vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor = vtkSmartPointer<vtkRenderWindowInteractor>::New(); renderWindowInteractor->SetRenderWindow(renderWindow); // Create an image vtkSmartPointer<vtkImageCanvasSource2D> drawing = vtkSmartPointer<vtkImageCanvasSource2D>::New(); drawing->SetScalarTypeToUnsignedChar(); drawing->SetNumberOfScalarComponents(3); drawing->SetExtent(0,200,0,200,0,0); // Clear the image drawing->SetDrawColor(255, 127, 100); drawing->FillBox(0,200,0,200); drawing->SetDrawColor(0, 0, 0); drawing->DrawCircle(100, 100, 50); drawing->Update(); vtkSmartPointer<vtkLogoRepresentation> logoRepresentation = vtkSmartPointer<vtkLogoRepresentation>::New(); logoRepresentation->SetImage(drawing->GetOutput()); logoRepresentation->SetPosition(0,0); logoRepresentation->SetPosition2(.4, .4); logoRepresentation->GetImageProperty()->SetOpacity(.7); vtkSmartPointer<vtkLogoWidget> logoWidget = vtkSmartPointer<vtkLogoWidget>::New(); logoWidget->SetInteractor(renderWindowInteractor); logoWidget->SetRepresentation(logoRepresentation); renderWindow->Render(); logoWidget->On(); renderer->SetBackground(.2, .3, .4); renderWindow->Render(); renderWindowInteractor->Start(); return EXIT_SUCCESS; }
CMakeLists.txt¶
cmake_minimum_required(VERSION 2.8) PROJECT(LogoWidget) find_package(VTK REQUIRED) include(${VTK_USE_FILE}) add_executable(LogoWidget MACOSX_BUNDLE LogoWidget.cxx) target_link_libraries(LogoWidget ${VTK_LIBRARIES})
Download and Build LogoWidget¶
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 LogoWidget and its CMakeLists.txt file. Once the tarball LogoWidget.tar has been downloaded and extracted,
cd LogoWidget/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:
./LogoWidget
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.