RotateActor
VTKExamples/Cxx/Visualization/RotateActor
Description¶
This example shows how to rotate an actor. It also shows how to get the current transformation of the actor so it can then be applied to the actual object if so desired.
Code¶
RotateActor.cxx
#include <vtkConeSource.h> #include <vtkPolyData.h> #include <vtkSmartPointer.h> #include <vtkPolyDataMapper.h> #include <vtkActor.h> #include <vtkRenderWindow.h> #include <vtkRenderer.h> #include <vtkRenderWindowInteractor.h> #include <vtkInteractorStyleTrackballActor.h> #include <vtkObjectFactory.h> #include <vtkMatrix4x4.h> // Define interaction style class MyInteractorStyle : public vtkInteractorStyleTrackballActor { public: static MyInteractorStyle* New(); vtkTypeMacro(MyInteractorStyle, vtkInteractorStyleTrackballActor); virtual void OnLeftButtonDown() { std::cout << "Pressed left mouse button." << std::endl; vtkSmartPointer<vtkMatrix4x4> m = vtkSmartPointer<vtkMatrix4x4>::New(); this->Actor->GetMatrix(m); std::cout << "Matrix: " << endl << *m << std::endl; // Forward events vtkInteractorStyleTrackballActor::OnLeftButtonDown(); } virtual void OnLeftButtonUp() { std::cout << "Released left mouse button." << std::endl; vtkSmartPointer<vtkMatrix4x4> m = vtkSmartPointer<vtkMatrix4x4>::New(); this->Actor->GetMatrix(m); std::cout << "Matrix: " << endl << *m << std::endl; // Forward events vtkInteractorStyleTrackballActor::OnLeftButtonUp(); } void SetActor(vtkSmartPointer<vtkActor> actor) {this->Actor = actor;} private: vtkSmartPointer<vtkActor> Actor; }; vtkStandardNewMacro(MyInteractorStyle); int main(int, char *[]) { // Create a sphere vtkSmartPointer<vtkConeSource> coneSource = vtkSmartPointer<vtkConeSource>::New(); coneSource->Update(); // Create a mapper and actor vtkSmartPointer<vtkPolyDataMapper> mapper = vtkSmartPointer<vtkPolyDataMapper>::New(); mapper->SetInputConnection(coneSource->GetOutputPort()); vtkSmartPointer<vtkActor> actor = vtkSmartPointer<vtkActor>::New(); actor->SetMapper(mapper); actor->RotateY(45); // Create a renderer, render window, and interactor vtkSmartPointer<vtkRenderer> renderer = vtkSmartPointer<vtkRenderer>::New(); vtkSmartPointer<vtkRenderWindow> renderWindow = vtkSmartPointer<vtkRenderWindow>::New(); renderWindow->AddRenderer(renderer); vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor = vtkSmartPointer<vtkRenderWindowInteractor>::New(); renderWindowInteractor->SetRenderWindow(renderWindow); vtkSmartPointer<MyInteractorStyle> style = vtkSmartPointer<MyInteractorStyle>::New(); style->SetActor(actor); renderWindowInteractor->SetInteractorStyle( style ); // Add the actor to the scene renderer->AddActor(actor); renderer->SetBackground(1,1,1); //white // Render and interact renderWindow->Render(); renderWindowInteractor->Start(); return EXIT_SUCCESS; }
CMakeLists.txt¶
cmake_minimum_required(VERSION 2.8) PROJECT(RotateActor) find_package(VTK REQUIRED) include(${VTK_USE_FILE}) add_executable(RotateActor MACOSX_BUNDLE RotateActor.cxx) target_link_libraries(RotateActor ${VTK_LIBRARIES})
Download and Build RotateActor¶
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 RotateActor and its CMakeLists.txt file. Once the tarball RotateActor.tar has been downloaded and extracted,
cd RotateActor/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:
./RotateActor
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.