InteractWithImage
VTKExamples/Cxx/Images/InteractWithImage
Description¶
This example shows how to display an image and zoom/pan/adjust brightness interactively. A picture of the bunny is provided for the demo.
Code¶
InteractWithImage.cxx
#include <vtkJPEGReader.h> #include <vtkImageMapper3D.h> #include <vtkImageActor.h> // Note: this is a 3D actor (c.f. vtkImageMapper which is 2D) #include <vtkRenderer.h> #include <vtkRenderWindow.h> #include <vtkRenderWindowInteractor.h> #include <vtkInteractorStyleImage.h> #include <vtkSmartPointer.h> int main(int argc, char* argv[]) { // Parse input arguments if ( argc != 2 ) { std::cout << "Required parameters: Filename" << std::endl; return EXIT_FAILURE; } std::string inputFilename = argv[1]; // Read the image vtkSmartPointer<vtkJPEGReader> reader = vtkSmartPointer<vtkJPEGReader>::New(); reader->SetFileName(inputFilename.c_str()); reader->Update(); // Create an actor vtkSmartPointer<vtkImageActor> actor = vtkSmartPointer<vtkImageActor>::New(); actor->GetMapper()->SetInputConnection(reader->GetOutputPort()); // Setup renderer vtkSmartPointer<vtkRenderer> renderer = vtkSmartPointer<vtkRenderer>::New(); renderer->AddActor(actor); renderer->ResetCamera(); // Setup render window vtkSmartPointer<vtkRenderWindow> window = vtkSmartPointer<vtkRenderWindow>::New(); window->AddRenderer(renderer); // Setup render window interactor vtkSmartPointer<vtkRenderWindowInteractor> interactor = vtkSmartPointer<vtkRenderWindowInteractor>::New(); interactor->SetRenderWindow(window); // Setup interactor style (this is what implements the zooming, panning and brightness adjustment functionality) vtkSmartPointer<vtkInteractorStyleImage> style = vtkSmartPointer<vtkInteractorStyleImage>::New(); interactor->SetInteractorStyle(style); // Render and start interaction interactor->Start(); return EXIT_SUCCESS; }
CMakeLists.txt¶
cmake_minimum_required(VERSION 2.8) PROJECT(InteractWithImage) find_package(VTK REQUIRED) include(${VTK_USE_FILE}) add_executable(InteractWithImage MACOSX_BUNDLE InteractWithImage.cxx) target_link_libraries(InteractWithImage ${VTK_LIBRARIES})
Download and Build InteractWithImage¶
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 Some tarballs may be missing or out-of-date.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 InteractWithImage and its CMakeLists.txt file. Once the tarball InteractWithImage.tar has been downloaded and extracted,
cd InteractWithImage/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:
./InteractWithImage
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.