GenericDataObjectReader
vtk-examples/Cxx/IO/GenericDataObjectReader
Question
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Code¶
GenericDataObjectReader.cxx
#include <string>
#include <vtkGenericDataObjectReader.h>
#include <vtkNew.h>
#include <vtkPolyData.h>
#include <vtkStructuredGrid.h>
#include <vtkUnstructuredGrid.h>
int main(int argc, char* argv[])
{
// Ensure a filename was specified
if (argc != 2)
{
std::cerr << "Usage: " << argv[0] << " InputFilename e.g. blow.vtk" << endl;
return EXIT_FAILURE;
}
// Get the filename from the command line
std::string inputFilename = argv[1];
// Get all data from the file
vtkNew<vtkGenericDataObjectReader> reader;
reader->SetFileName(inputFilename.c_str());
reader->Update();
// All of the standard data types can be checked and obtained like this:
if (reader->IsFilePolyData())
{
std::cout << "output is polydata," << std::endl;
auto output = reader->GetPolyDataOutput();
std::cout << " output has " << output->GetNumberOfPoints() << " points."
<< std::endl;
}
if (reader->IsFileUnstructuredGrid())
{
std::cout << "output is unstructured grid," << std::endl;
auto output = reader->GetUnstructuredGridOutput();
std::cout << " output has " << output->GetNumberOfPoints() << " points."
<< std::endl;
}
return EXIT_SUCCESS;
}
CMakeLists.txt¶
cmake_minimum_required(VERSION 3.3 FATAL_ERROR)
project(GenericDataObjectReader)
find_package(VTK COMPONENTS
vtkCommonCore
vtkCommonDataModel
vtkIOLegacy
QUIET
)
if (NOT VTK_FOUND)
message("Skipping GenericDataObjectReader: ${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(GenericDataObjectReader MACOSX_BUNDLE GenericDataObjectReader.cxx )
target_link_libraries(GenericDataObjectReader PRIVATE ${VTK_LIBRARIES})
else ()
# include all components
add_executable(GenericDataObjectReader MACOSX_BUNDLE GenericDataObjectReader.cxx )
target_link_libraries(GenericDataObjectReader PRIVATE ${VTK_LIBRARIES})
# vtk_module_autoinit is needed
vtk_module_autoinit(
TARGETS GenericDataObjectReader
MODULES ${VTK_LIBRARIES}
)
endif ()
Download and Build GenericDataObjectReader¶
Click here to download GenericDataObjectReader and its CMakeLists.txt file. Once the tarball GenericDataObjectReader.tar has been downloaded and extracted,
cd GenericDataObjectReader/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:
./GenericDataObjectReader
WINDOWS USERS
Be sure to add the VTK bin directory to your path. This will resolve the VTK dll's at run time.