vtkImageAlgorithmFilter
VTKExamples/Cxx/Developers/vtkImageAlgorithmFilter
Code¶
vtkImageAlgorithmFilter.cxx
#include "vtkImageAlgorithmFilter.h" #include "vtkImageData.h" #include "vtkObjectFactory.h" #include "vtkStreamingDemandDrivenPipeline.h" #include "vtkInformationVector.h" #include "vtkInformation.h" #include "vtkDataObject.h" #include "vtkSmartPointer.h" vtkStandardNewMacro(vtkImageAlgorithmFilter); int vtkImageAlgorithmFilter::RequestData(vtkInformation *vtkNotUsed(request), vtkInformationVector **inputVector, vtkInformationVector *outputVector) { // Get the info objects vtkInformation *inInfo = inputVector[0]->GetInformationObject(0); vtkInformation *outInfo = outputVector->GetInformationObject(0); // Get the input and ouptut vtkImageData *input = vtkImageData::SafeDownCast( inInfo->Get(vtkDataObject::DATA_OBJECT())); vtkImageData *output = vtkImageData::SafeDownCast( outInfo->Get(vtkDataObject::DATA_OBJECT())); vtkSmartPointer<vtkImageData> image = vtkSmartPointer<vtkImageData>::New(); image->ShallowCopy(input); image->SetScalarComponentFromDouble(0,0,0,0, 5.0); output->ShallowCopy(image); // Without these lines, the output will appear real but will not work as the input to any other filters int extent[6]; input->GetExtent(extent); output->SetExtent(extent); outInfo->Set(vtkStreamingDemandDrivenPipeline::UPDATE_EXTENT(), extent, 6); outInfo->Set(vtkStreamingDemandDrivenPipeline::WHOLE_EXTENT(), extent, 6); return 1; }
CMakeLists.txt¶
cmake_minimum_required(VERSION 2.8) PROJECT(vtkImageAlgorithmFilter) find_package(VTK REQUIRED) include(${VTK_USE_FILE}) add_executable(vtkImageAlgorithmFilter MACOSX_BUNDLE vtkImageAlgorithmFilter.cxx) target_link_libraries(vtkImageAlgorithmFilter ${VTK_LIBRARIES})
Download and Build vtkImageAlgorithmFilter¶
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Click here to download vtkImageAlgorithmFilter and its CMakeLists.txt file. Once the tarball vtkImageAlgorithmFilter.tar has been downloaded and extracted,
cd vtkImageAlgorithmFilter/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:
./vtkImageAlgorithmFilter
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.