ImageDataToPointSet
vtk-examples/Cxx/ImageData/ImageDataToPointSet
Question
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Code¶
ImageDataToPointSet.cxx
#include <vtkImageData.h>
#include <vtkPoints.h>
#include <vtkImageDataToPointSet.h>
#include <vtkNew.h>
#include <vtkXMLStructuredGridWriter.h>
#include <vtkStructuredGrid.h>
namespace {
void CreateImage(vtkImageData* image);
}
int main(int, char *[])
{
vtkNew<vtkImageData> image;
CreateImage(image);
vtkNew<vtkImageDataToPointSet> imageDataToPointSet;
imageDataToPointSet->SetInputData(image);
imageDataToPointSet->Update();
vtkNew<vtkXMLStructuredGridWriter> writer;
writer->SetInputConnection(imageDataToPointSet->GetOutputPort());
writer->SetFileName("Test.vts");
writer->Write();
return EXIT_SUCCESS;
}
namespace {
void CreateImage(vtkImageData* image)
{
// Create an image
image->SetDimensions(3,3,1);
image->AllocateScalars(VTK_UNSIGNED_CHAR,1);
int dims[3];
image->GetDimensions(dims);
for(int i = 0; i < dims[0]; i++)
{
for(int j = 0; j < dims[1]; j++)
{
unsigned char* pixel = static_cast<unsigned char*>(image->GetScalarPointer(i,j,0));
pixel[0] = 1;
}
}
}
}
CMakeLists.txt¶
cmake_minimum_required(VERSION 3.3 FATAL_ERROR)
project(ImageDataToPointSet)
find_package(VTK COMPONENTS
vtkCommonCore
vtkCommonDataModel
vtkFiltersGeneral
vtkIOXML
QUIET
)
if (NOT VTK_FOUND)
message("Skipping ImageDataToPointSet: ${VTK_NOT_FOUND_MESSAGE}")
return ()
endif()
message (STATUS "VTK_VERSION: ${VTK_VERSION}")
if (VTK_VERSION VERSION_LESS "8.90.0")
# old system
include(${VTK_USE_FILE})
add_executable(ImageDataToPointSet MACOSX_BUNDLE ImageDataToPointSet.cxx )
target_link_libraries(ImageDataToPointSet PRIVATE ${VTK_LIBRARIES})
else ()
# include all components
add_executable(ImageDataToPointSet MACOSX_BUNDLE ImageDataToPointSet.cxx )
target_link_libraries(ImageDataToPointSet PRIVATE ${VTK_LIBRARIES})
# vtk_module_autoinit is needed
vtk_module_autoinit(
TARGETS ImageDataToPointSet
MODULES ${VTK_LIBRARIES}
)
endif ()
Download and Build ImageDataToPointSet¶
Click here to download ImageDataToPointSet and its CMakeLists.txt file. Once the tarball ImageDataToPointSet.tar has been downloaded and extracted,
cd ImageDataToPointSet/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:
./ImageDataToPointSet
WINDOWS USERS
Be sure to add the VTK bin directory to your path. This will resolve the VTK dll's at run time.