BorderPixelSize
VTKExamples/Cxx/Images/BorderPixelSize
Code¶
BorderPixelSize.cxx
#include <vtkVersion.h> #include <vtkImageData.h> #include <vtkSmartPointer.h> #include <vtkRenderWindow.h> #include <vtkRenderWindowInteractor.h> #include <vtkInteractorStyleImage.h> #include <vtkRenderer.h> #include <vtkImageMapper.h> #include <vtkImageSliceMapper.h> #include <vtkImageSlice.h> #include <vtkImageProperty.h> static void CreateRandomImage(vtkImageData* image, const unsigned int dimension); int main(int, char *[]) { // Big image vtkSmartPointer<vtkImageData> image = vtkSmartPointer<vtkImageData>::New(); CreateRandomImage(image, 50); vtkSmartPointer<vtkImageSliceMapper> imageSliceMapper = vtkSmartPointer<vtkImageSliceMapper>::New(); #if VTK_MAJOR_VERSION <= 5 imageSliceMapper->SetInputConnection(image->GetProducerPort()); #else imageSliceMapper->SetInputData(image); #endif imageSliceMapper->BorderOn(); // This line tells the mapper to draw the full border pixels. vtkSmartPointer<vtkImageSlice> imageSlice = vtkSmartPointer<vtkImageSlice>::New(); imageSlice->SetMapper(imageSliceMapper); imageSlice->GetProperty()->SetInterpolationTypeToNearest(); vtkSmartPointer<vtkRenderer> renderer = vtkSmartPointer<vtkRenderer>::New(); renderer->AddViewProp(imageSlice); 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 CreateRandomImage(vtkImageData* image, const unsigned int dimension) { image->SetDimensions(dimension, dimension, 1); image->SetOrigin(.5,.5,0); #if VTK_MAJOR_VERSION <= 5 image->SetNumberOfScalarComponents(3); image->SetScalarTypeToUnsignedChar(); image->AllocateScalars(); #else image->AllocateScalars(VTK_UNSIGNED_CHAR,3); #endif for(unsigned int x = 0; x < dimension; x++) { for(unsigned int y = 0; y < dimension; y++) { unsigned char* pixel = static_cast<unsigned char*>(image->GetScalarPointer(x,y,0)); pixel[0] = rand() % 255; pixel[1] = rand() % 255; pixel[2] = rand() % 255; } } image->Modified(); }
CMakeLists.txt¶
cmake_minimum_required(VERSION 2.8) PROJECT(BorderPixelSize) find_package(VTK REQUIRED) include(${VTK_USE_FILE}) add_executable(BorderPixelSize MACOSX_BUNDLE BorderPixelSize.cxx) target_link_libraries(BorderPixelSize ${VTK_LIBRARIES})
Download and Build BorderPixelSize¶
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 BorderPixelSize and its CMakeLists.txt file. Once the tarball BorderPixelSize.tar has been downloaded and extracted,
cd BorderPixelSize/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:
./BorderPixelSize
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.