ImageOrder
VTKExamples/Cxx/Visualization/ImageOrder
Code¶
ImageOrder.cxx
#include <vtkVersion.h> #include <vtkImageActor.h> #include <vtkImageData.h> #include <vtkInteractorStyleImage.h> #include <vtkRenderer.h> #include <vtkRenderWindow.h> #include <vtkRenderWindowInteractor.h> #include <vtkSmartPointer.h> static void CreateWhiteImage(vtkSmartPointer<vtkImageData> image); static void CreateRedImage(vtkSmartPointer<vtkImageData> image); int main(int, char* []) { // Image 1 vtkSmartPointer<vtkImageData> whiteImage = vtkSmartPointer<vtkImageData>::New(); CreateWhiteImage(whiteImage); vtkSmartPointer<vtkImageActor> whiteImageActor = vtkSmartPointer<vtkImageActor>::New(); #if VTK_MAJOR_VERSION <= 5 whiteImageActor->SetInput(whiteImage); #else whiteImageActor->SetInputData(whiteImage); #endif // Image 2 vtkSmartPointer<vtkImageData> redImage = vtkSmartPointer<vtkImageData>::New(); CreateRedImage(redImage); vtkSmartPointer<vtkImageActor> redImageActor = vtkSmartPointer<vtkImageActor>::New(); #if VTK_MAJOR_VERSION <= 5 redImageActor->SetInput(redImage); #else redImageActor->SetInputData(redImage); #endif // Visualize vtkSmartPointer<vtkRenderer> renderer = vtkSmartPointer<vtkRenderer>::New(); // Red image is displayed renderer->AddActor(whiteImageActor); renderer->AddActor(redImageActor); // White image is displayed //renderer->AddActor(redImageActor); //renderer->AddActor(whiteImageActor); renderer->ResetCamera(); vtkSmartPointer<vtkRenderWindow> renderWindow = vtkSmartPointer<vtkRenderWindow>::New(); renderWindow->AddRenderer(renderer); vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor = vtkSmartPointer<vtkRenderWindowInteractor>::New(); vtkSmartPointer<vtkInteractorStyleImage> style = vtkSmartPointer<vtkInteractorStyleImage>::New(); renderWindowInteractor->SetInteractorStyle(style); renderWindowInteractor->SetRenderWindow(renderWindow); renderWindowInteractor->Initialize(); renderWindowInteractor->Start(); return EXIT_SUCCESS; } void CreateWhiteImage(vtkSmartPointer<vtkImageData> image) { // Create a white image image->SetDimensions(10,10,1); #if VTK_MAJOR_VERSION <= 5 image->SetNumberOfScalarComponents(3); image->SetScalarTypeToUnsignedChar(); image->AllocateScalars(); #else image->AllocateScalars(VTK_UNSIGNED_CHAR,3); #endif int* dims = image->GetDimensions(); for (int y = 0; y < dims[1]; y++) { for (int x = 0; x < dims[0]; x++) { unsigned char* pixel = static_cast<unsigned char*>(image->GetScalarPointer(x,y,0)); pixel[0] = 255; pixel[1] = 255; pixel[2] = 255; } } } void CreateRedImage(vtkSmartPointer<vtkImageData> image) { // Create a red image image->SetDimensions(10,10,1); #if VTK_MAJOR_VERSION <= 5 image->SetNumberOfScalarComponents(3); image->SetScalarTypeToUnsignedChar(); image->AllocateScalars(); #else image->AllocateScalars(VTK_UNSIGNED_CHAR,3); #endif int* dims = image->GetDimensions(); for (int y = 0; y < dims[1]; y++) { for (int x = 0; x < dims[0]; x++) { unsigned char* pixel = static_cast<unsigned char*>(image->GetScalarPointer(x,y,0)); pixel[0] = 255; pixel[1] = 0; pixel[2] = 0; } } }
CMakeLists.txt¶
cmake_minimum_required(VERSION 2.8) PROJECT(ImageOrder) find_package(VTK REQUIRED) include(${VTK_USE_FILE}) add_executable(ImageOrder MACOSX_BUNDLE ImageOrder.cxx) target_link_libraries(ImageOrder ${VTK_LIBRARIES})
Download and Build ImageOrder¶
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 ImageOrder and its CMakeLists.txt file. Once the tarball ImageOrder.tar has been downloaded and extracted,
cd ImageOrder/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:
./ImageOrder
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.