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https://gitlab.kitware.com/vtk/vtk-m
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07cb111904
1) Fix parsing issues related to visit style field data 2) Create appropriate dimension cellset for structured cell sets
95 lines
3.1 KiB
C++
95 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_VTKStructuredPointsReader_h
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#define vtk_m_io_reader_VTKStructuredPointsReader_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 VTKStructuredPointsReader : public VTKDataSetReaderBase
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{
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public:
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explicit VTKStructuredPointsReader(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_STRUCTURED_POINTS)
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{
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throw vtkm::io::ErrorIO("Incorrect DataSet type");
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}
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std::string tag;
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// Read structured points specific meta-data
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vtkm::Id3 dim;
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vtkm::Vec<vtkm::Float32, 3> origin, spacing;
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//Two ways the file can describe the dimensions. The proper way is by
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//using the DIMENSIONS keyword, but VisIt written VTK files spicify data
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//bounds instead, as a FIELD
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std::vector<vtkm::Float32> visitBounds;
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this->DataFile->Stream >> tag;
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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, &visitBounds);
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this->DataFile->Stream >> tag;
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}
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if(visitBounds.empty())
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{
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internal::parseAssert(tag == "DIMENSIONS");
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this->DataFile->Stream >> dim[0] >> dim[1] >> dim[2] >> std::ws;
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this->DataFile->Stream >> tag;
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}
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internal::parseAssert(tag == "SPACING");
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this->DataFile->Stream >> spacing[0] >> spacing[1] >> spacing[2] >> std::ws;
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if (!visitBounds.empty())
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{
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//now with spacing and physical bounds we can back compute the dimensions
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dim[0] = static_cast<vtkm::Id>((visitBounds[1] - visitBounds[0]) / spacing[0]);
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dim[1] = static_cast<vtkm::Id>((visitBounds[3] - visitBounds[2]) / spacing[1]);
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dim[2] = static_cast<vtkm::Id>((visitBounds[5] - visitBounds[4]) / spacing[2]);
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}
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this->DataFile->Stream >> tag >> origin[0] >> origin[1] >> origin[2] >> std::ws;
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internal::parseAssert(tag == "ORIGIN");
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this->DataSet.AddCellSet(internal::CreateCellSetStructured(dim));
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this->DataSet.AddCoordinateSystem(vtkm::cont::CoordinateSystem("coordinates",
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dim, origin, spacing));
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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_VTKStructuredPointsReader_h
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