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VTKExodusFileReader.cxx
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VTKExodusFileReader.cxx
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/*=========================================================================
*
* Copyright Insight Software Consortium
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0.txt
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*=========================================================================*/
#include "vtkAppendCompositeDataLeaves.h"
#include "vtkExodusIIReader.h"
#include "vtkGeometryFilter.h"
#include "vtkJSONDataSetWriter.h"
#include "vtkMultiBlockDataSet.h"
#include "vtkPolyData.h"
#include "vtkSmartPointer.h"
#include "vtkArchiver.h"
vtkPolyData* FindPolyData(vtkMultiBlockDataSet* output)
{
int nb = output->GetNumberOfBlocks();
for (int bb = 0; bb < nb; ++bb)
{
auto data = output->GetBlock(bb);
if (data)
{
auto polydata = vtkPolyData::SafeDownCast(data);
if (polydata)
{
return polydata;
}
auto mbds = vtkMultiBlockDataSet::SafeDownCast(data);
if (mbds)
{
polydata = FindPolyData(mbds);
if (polydata)
{
return polydata;
}
}
}
}
return nullptr;
}
int main(int argc, char* argv[]) {
if (argc < 3) {
std::cerr << "Usage: " << argv[0] << " <inputFile> <outputPolyDataFile> "
<< std::endl;
return EXIT_FAILURE;
}
const char* inputFile = argv[1];
const char* outputPolyDataFile = argv[2];
vtkNew<vtkGeometryFilter> geometryFilter;
vtkNew<vtkAppendCompositeDataLeaves> appendFilter;
vtkNew<vtkArchiver> archiver;
archiver->SetArchiveName(outputPolyDataFile);
vtkNew<vtkJSONDataSetWriter> writer;
writer->SetArchiver(archiver);
bool canReadFile = false;
auto reader = vtkSmartPointer<vtkExodusIIReader>::New();
if (reader->CanReadFile(inputFile)) {
canReadFile = true;
reader->SetFileName(inputFile);
// Request all point and cell arrays
reader->SetAllArrayStatus(vtkExodusIIReader::NODAL, 1);
reader->SetAllArrayStatus(vtkExodusIIReader::ELEM_BLOCK, 1);
geometryFilter->SetInputConnection(reader->GetOutputPort());
appendFilter->SetInputConnection(geometryFilter->GetOutputPort());
appendFilter->Update();
auto output = vtkMultiBlockDataSet::SafeDownCast(appendFilter->GetOutputDataObject(0));
auto polydata = FindPolyData(output);
if (!polydata)
{
std::cerr << "Read file but could not produce polydata." << std::endl;
canReadFile = false;
}
writer->SetInputDataObject(0, polydata);
}
if (!canReadFile) {
std::cerr << "Unsupported file." << std::endl;
return EXIT_FAILURE;
}
try {
writer->Update();
} catch (const std::exception& error) {
std::cerr << "Error: " << error.what() << std::endl;
return EXIT_FAILURE;
}
return EXIT_SUCCESS;
}