ImageDataGeometryFilter
VTKExamples/Cxx/ImageData/ImageDataGeometryFilter
Description¶
Convert a vtkImageData to a vtkPolyData.
Code¶
ImageDataGeometryFilter.cxx
#include <vtkSphereSource.h> #include <vtkPolyData.h> #include <vtkSmartPointer.h> #include <vtkPolyDataMapper.h> #include <vtkActor.h> #include <vtkRenderWindow.h> #include <vtkRenderer.h> #include <vtkRenderWindowInteractor.h> #include <vtkImageData.h> #include <vtkImageCanvasSource2D.h> #include <vtkImageDataGeometryFilter.h> int main(int, char *[]) { // Create an image vtkSmartPointer<vtkImageCanvasSource2D> source1 = vtkSmartPointer<vtkImageCanvasSource2D>::New(); source1->SetScalarTypeToUnsignedChar(); source1->SetNumberOfScalarComponents(3); source1->SetExtent(0, 100, 0, 100, 0, 0); source1->SetDrawColor(0,0,0,1); source1->FillBox(0, 100, 0, 100); source1->SetDrawColor(255,0,0,1); source1->FillBox(10, 20, 10, 20); source1->FillBox(40, 50, 20, 30); source1->Update(); // Convert the image to a polydata vtkSmartPointer<vtkImageDataGeometryFilter> imageDataGeometryFilter = vtkSmartPointer<vtkImageDataGeometryFilter>::New(); imageDataGeometryFilter->SetInputConnection(source1->GetOutputPort()); imageDataGeometryFilter->Update(); // Create a mapper and actor vtkSmartPointer<vtkPolyDataMapper> mapper = vtkSmartPointer<vtkPolyDataMapper>::New(); mapper->SetInputConnection(imageDataGeometryFilter->GetOutputPort()); vtkSmartPointer<vtkActor> actor = vtkSmartPointer<vtkActor>::New(); actor->SetMapper(mapper); // Visualization vtkSmartPointer<vtkRenderer> renderer = vtkSmartPointer<vtkRenderer>::New(); vtkSmartPointer<vtkRenderWindow> renderWindow = vtkSmartPointer<vtkRenderWindow>::New(); renderWindow->AddRenderer(renderer); vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor = vtkSmartPointer<vtkRenderWindowInteractor>::New(); renderWindowInteractor->SetRenderWindow(renderWindow); renderer->AddActor(actor); renderer->SetBackground(1,1,1); // Background color white renderWindow->Render(); renderWindowInteractor->Start(); return EXIT_SUCCESS; }
CMakeLists.txt¶
cmake_minimum_required(VERSION 2.8) PROJECT(ImageDataGeometryFilter) find_package(VTK REQUIRED) include(${VTK_USE_FILE}) add_executable(ImageDataGeometryFilter MACOSX_BUNDLE ImageDataGeometryFilter.cxx) target_link_libraries(ImageDataGeometryFilter ${VTK_LIBRARIES})
Download and Build ImageDataGeometryFilter¶
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Click here to download ImageDataGeometryFilter and its CMakeLists.txt file. Once the tarball ImageDataGeometryFilter.tar has been downloaded and extracted,
cd ImageDataGeometryFilter/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:
./ImageDataGeometryFilter
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.