mirror of
https://gitlab.kitware.com/vtk/vtk-m
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106 lines
3.1 KiB
C++
106 lines
3.1 KiB
C++
//============================================================================
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// Copyright (c) Kitware, Inc.
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// All rights reserved.
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// See LICENSE.txt for details.
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// This software is distributed WITHOUT ANY WARRANTY; without even
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// the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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// PURPOSE. See the above copyright notice for more information.
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//
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// Copyright 2015 Sandia Corporation.
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// Copyright 2015 UT-Battelle, LLC.
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// Copyright 2015 Los Alamos National Security.
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//
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// Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
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// the U.S. Government retains certain rights in this software.
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//
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// Under the terms of Contract DE-AC52-06NA25396 with Los Alamos National
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// Laboratory (LANL), the U.S. Government retains certain rights in
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// this software.
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//============================================================================
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#ifndef vtk_m_io_reader_VTKUnstructuredGridReader_h
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#define vtk_m_io_reader_VTKUnstructuredGridReader_h
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#include <vtkm/io/reader/VTKDataSetReaderBase.h>
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namespace vtkm {
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namespace io {
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namespace reader {
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class VTKUnstructuredGridReader : public VTKDataSetReaderBase
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{
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public:
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explicit VTKUnstructuredGridReader(const char *fileName)
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: VTKDataSetReaderBase(fileName)
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{ }
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private:
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virtual void Read()
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{
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if (this->DataFile->Structure != vtkm::io::internal::DATASET_UNSTRUCTURED_GRID)
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{
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throw vtkm::io::ErrorIO("Incorrect DataSet type");
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}
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//We need to be able to handle VisIt files which dump Field data
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//at the top of a VTK file
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std::string tag;
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this->DataFile->Stream >> tag;
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internal::parseAssert(tag == "POINTS" || tag == "FIELD");
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if(tag == "FIELD")
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{
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std::string name;
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this->ReadFields(name);
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this->DataFile->Stream >> tag;
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internal::parseAssert(tag == "POINTS");
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}
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// Read the points
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this->ReadPoints();
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vtkm::Id numPoints =
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this->DataSet.GetCoordinateSystem().GetData().GetNumberOfValues();
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// Read the cellset
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vtkm::cont::ArrayHandle<vtkm::Id> connectivity;
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vtkm::cont::ArrayHandle<vtkm::IdComponent> numIndices;
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vtkm::cont::ArrayHandle<vtkm::UInt8> shapes;
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this->DataFile->Stream >> tag;
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internal::parseAssert(tag == "CELLS");
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this->ReadCells(connectivity, numIndices);
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this->ReadShapes(shapes);
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vtkm::cont::ArrayHandle<vtkm::Id> permutation;
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vtkm::io::internal::FixupCellSet(connectivity, numIndices, shapes, permutation);
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this->SetCellsPermutation(permutation);
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//DRP
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if (false) //vtkm::io::internal::IsSingleShape(shapes))
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{
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vtkm::cont::CellSetSingleType<> cellSet("cells");
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cellSet.Fill(numPoints,
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shapes.GetPortalConstControl().Get(0),
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numIndices.GetPortalConstControl().Get(0),
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connectivity);
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this->DataSet.AddCellSet(cellSet);
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}
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else
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{
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vtkm::cont::CellSetExplicit<> cellSet("cells");
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cellSet.Fill(numPoints, shapes, numIndices, connectivity);
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this->DataSet.AddCellSet(cellSet);
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}
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// Read points and cell attributes
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this->ReadAttributes();
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}
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};
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}
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}
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} // namespace vtkm::io:reader
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#endif // vtk_m_io_reader_VTKUnstructuredGridReader_h
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