mirror of
https://gitlab.kitware.com/vtk/vtk-m
synced 2024-09-20 02:55:47 +00:00
433 lines
12 KiB
C++
433 lines
12 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 2014 National Technology & Engineering Solutions of Sandia, LLC (NTESS).
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// Copyright 2014 UT-Battelle, LLC.
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// Copyright 2014 Los Alamos National Security.
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//
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// Under the terms of Contract DE-NA0003525 with NTESS,
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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_writer_DataSetWriter_h
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#define vtk_m_io_writer_DataSetWriter_h
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#include <vtkm/CellShape.h>
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#include <vtkm/cont/CellSetExplicit.h>
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#include <vtkm/cont/CellSetSingleType.h>
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#include <vtkm/cont/CellSetStructured.h>
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#include <vtkm/cont/DataSet.h>
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#include <vtkm/cont/ErrorBadType.h>
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#include <vtkm/cont/ErrorBadValue.h>
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#include <vtkm/cont/Field.h>
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#include <vtkm/io/ErrorIO.h>
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#include <vtkm/io/internal/VTKDataSetTypes.h>
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#include <algorithm>
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#include <cstring>
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#include <fstream>
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#include <iostream>
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#include <string>
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#include <vector>
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namespace vtkm
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{
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namespace io
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{
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namespace writer
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{
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namespace detail
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{
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struct OutputPointsFunctor
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{
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private:
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std::ostream& out;
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template <typename PortalType>
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VTKM_CONT void Output(const PortalType& portal) const
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{
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for (vtkm::Id index = 0; index < portal.GetNumberOfValues(); index++)
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{
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const int VTKDims = 3; // VTK files always require 3 dims for points
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using ValueType = typename PortalType::ValueType;
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using VecType = typename vtkm::VecTraits<ValueType>;
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const ValueType& value = portal.Get(index);
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vtkm::IdComponent numComponents = VecType::GetNumberOfComponents(value);
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for (vtkm::IdComponent c = 0; c < numComponents && c < VTKDims; c++)
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{
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out << (c == 0 ? "" : " ") << VecType::GetComponent(value, c);
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}
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for (vtkm::IdComponent c = numComponents; c < VTKDims; c++)
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{
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out << " 0";
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}
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out << std::endl;
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}
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}
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public:
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VTKM_CONT
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OutputPointsFunctor(std::ostream& o)
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: out(o)
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{
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}
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template <typename T, typename Storage>
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VTKM_CONT void operator()(const vtkm::cont::ArrayHandle<T, Storage>& array) const
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{
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this->Output(array.GetPortalConstControl());
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}
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};
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struct OutputFieldFunctor
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{
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private:
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std::ostream& out;
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template <typename PortalType>
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VTKM_CONT void Output(const PortalType& portal) const
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{
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for (vtkm::Id index = 0; index < portal.GetNumberOfValues(); index++)
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{
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using ValueType = typename PortalType::ValueType;
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using VecType = typename vtkm::VecTraits<ValueType>;
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const ValueType& value = portal.Get(index);
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vtkm::IdComponent numComponents = VecType::GetNumberOfComponents(value);
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for (vtkm::IdComponent c = 0; c < numComponents; c++)
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{
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out << (c == 0 ? "" : " ") << VecType::GetComponent(value, c);
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}
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out << std::endl;
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}
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}
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public:
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VTKM_CONT
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OutputFieldFunctor(std::ostream& o)
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: out(o)
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{
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}
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template <typename T, typename Storage>
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VTKM_CONT void operator()(const vtkm::cont::ArrayHandle<T, Storage>& array) const
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{
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this->Output(array.GetPortalConstControl());
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}
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};
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class GetDataTypeName
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{
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public:
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GetDataTypeName(std::string& name)
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: Name(&name)
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{
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}
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template <typename ArrayHandleType>
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void operator()(const ArrayHandleType&) const
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{
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using DataType = typename vtkm::VecTraits<typename ArrayHandleType::ValueType>::ComponentType;
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*this->Name = vtkm::io::internal::DataTypeName<DataType>::Name();
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}
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private:
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std::string* Name;
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};
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} // namespace detail
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struct VTKDataSetWriter
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{
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private:
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static void WritePoints(std::ostream& out, vtkm::cont::DataSet dataSet)
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{
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///\todo: support other coordinate systems
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int cindex = 0;
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vtkm::cont::CoordinateSystem coords = dataSet.GetCoordinateSystem(cindex);
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vtkm::cont::DynamicArrayHandleCoordinateSystem cdata = coords.GetData();
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vtkm::Id npoints = cdata.GetNumberOfValues();
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std::string typeName;
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vtkm::cont::CastAndCall(cdata, detail::GetDataTypeName(typeName));
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out << "POINTS " << npoints << " " << typeName << " " << std::endl;
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vtkm::cont::CastAndCall(cdata, detail::OutputPointsFunctor(out));
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}
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template <class CellSetType>
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static void WriteExplicitCells(std::ostream& out, CellSetType cellSet)
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{
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vtkm::Id nCells = cellSet.GetNumberOfCells();
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vtkm::Id conn_length = 0;
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for (vtkm::Id i = 0; i < nCells; ++i)
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{
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conn_length += 1 + cellSet.GetNumberOfPointsInCell(i);
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}
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out << "CELLS " << nCells << " " << conn_length << std::endl;
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for (vtkm::Id i = 0; i < nCells; ++i)
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{
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vtkm::cont::ArrayHandle<vtkm::Id> ids;
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vtkm::Id nids = cellSet.GetNumberOfPointsInCell(i);
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cellSet.GetIndices(i, ids);
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out << nids;
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auto IdPortal = ids.GetPortalConstControl();
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for (int j = 0; j < nids; ++j)
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out << " " << IdPortal.Get(j);
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out << std::endl;
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}
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out << "CELL_TYPES " << nCells << std::endl;
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for (vtkm::Id i = 0; i < nCells; ++i)
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{
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vtkm::Id shape = cellSet.GetCellShape(i);
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out << shape << std::endl;
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}
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}
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static void WriteVertexCells(std::ostream& out, vtkm::cont::DataSet dataSet)
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{
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vtkm::Id nCells = dataSet.GetCoordinateSystem(0).GetData().GetNumberOfValues();
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out << "CELLS " << nCells << " " << nCells * 2 << std::endl;
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for (int i = 0; i < nCells; i++)
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{
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out << "1 " << i << std::endl;
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}
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out << "CELL_TYPES " << nCells << std::endl;
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for (int i = 0; i < nCells; i++)
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{
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out << vtkm::CELL_SHAPE_VERTEX << std::endl;
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}
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}
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static void WritePointFields(std::ostream& out, vtkm::cont::DataSet dataSet)
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{
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bool wrote_header = false;
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for (vtkm::Id f = 0; f < dataSet.GetNumberOfFields(); f++)
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{
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const vtkm::cont::Field field = dataSet.GetField(f);
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if (field.GetAssociation() != vtkm::cont::Field::ASSOC_POINTS)
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{
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continue;
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}
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vtkm::Id npoints = field.GetData().GetNumberOfValues();
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int ncomps = field.GetData().GetNumberOfComponents();
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if (ncomps > 4)
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{
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continue;
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}
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if (!wrote_header)
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{
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out << "POINT_DATA " << npoints << std::endl;
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wrote_header = true;
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}
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std::string typeName;
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vtkm::cont::CastAndCall(field, detail::GetDataTypeName(typeName));
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out << "SCALARS " << field.GetName() << " " << typeName << " " << ncomps << std::endl;
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out << "LOOKUP_TABLE default" << std::endl;
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vtkm::cont::CastAndCall(field, detail::OutputFieldFunctor(out));
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}
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}
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static void WriteCellFields(std::ostream& out,
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vtkm::cont::DataSet dataSet,
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vtkm::cont::DynamicCellSet cellSet)
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{
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bool wrote_header = false;
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for (vtkm::Id f = 0; f < dataSet.GetNumberOfFields(); f++)
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{
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const vtkm::cont::Field field = dataSet.GetField(f);
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if (field.GetAssociation() != vtkm::cont::Field::ASSOC_CELL_SET)
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{
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continue;
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}
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if (field.GetAssocCellSet() != cellSet.GetName())
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{
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continue;
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}
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vtkm::Id ncells = field.GetData().GetNumberOfValues();
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int ncomps = field.GetData().GetNumberOfComponents();
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if (ncomps > 4)
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continue;
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if (!wrote_header)
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{
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out << "CELL_DATA " << ncells << std::endl;
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wrote_header = true;
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}
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std::string typeName;
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vtkm::cont::CastAndCall(field, detail::GetDataTypeName(typeName));
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out << "SCALARS " << field.GetName() << " " << typeName << " " << ncomps << std::endl;
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out << "LOOKUP_TABLE default" << std::endl;
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vtkm::cont::CastAndCall(field, detail::OutputFieldFunctor(out));
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}
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}
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static void WriteDataSetAsPoints(std::ostream& out, vtkm::cont::DataSet dataSet)
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{
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out << "DATASET UNSTRUCTURED_GRID" << std::endl;
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WritePoints(out, dataSet);
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WriteVertexCells(out, dataSet);
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}
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template <class CellSetType>
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static void WriteDataSetAsUnstructured(std::ostream& out,
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vtkm::cont::DataSet dataSet,
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CellSetType cellSet)
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{
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out << "DATASET UNSTRUCTURED_GRID" << std::endl;
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WritePoints(out, dataSet);
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WriteExplicitCells(out, cellSet);
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}
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template <vtkm::IdComponent DIM>
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static void WriteDataSetAsStructured(std::ostream& out,
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vtkm::cont::DataSet dataSet,
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vtkm::cont::CellSetStructured<DIM> cellSet)
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{
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///\todo: support uniform/rectilinear
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out << "DATASET STRUCTURED_GRID" << std::endl;
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out << "DIMENSIONS ";
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out << cellSet.GetPointDimensions()[0] << " ";
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out << (DIM > 1 ? cellSet.GetPointDimensions()[1] : 1) << " ";
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out << (DIM > 2 ? cellSet.GetPointDimensions()[2] : 1) << std::endl;
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WritePoints(out, dataSet);
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}
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static void Write(std::ostream& out, vtkm::cont::DataSet dataSet, vtkm::Id csindex = 0)
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{
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VTKM_ASSERT(csindex < dataSet.GetNumberOfCellSets());
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out << "# vtk DataFile Version 3.0" << std::endl;
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out << "vtk output" << std::endl;
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out << "ASCII" << std::endl;
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if (csindex < 0)
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{
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WriteDataSetAsPoints(out, dataSet);
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WritePointFields(out, dataSet);
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}
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else
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{
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vtkm::cont::DynamicCellSet cellSet = dataSet.GetCellSet(csindex);
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if (cellSet.IsType<vtkm::cont::CellSetExplicit<>>())
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{
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WriteDataSetAsUnstructured(out, dataSet, cellSet.Cast<vtkm::cont::CellSetExplicit<>>());
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}
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else if (cellSet.IsType<vtkm::cont::CellSetStructured<2>>())
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{
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WriteDataSetAsStructured(out, dataSet, cellSet.Cast<vtkm::cont::CellSetStructured<2>>());
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}
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else if (cellSet.IsType<vtkm::cont::CellSetStructured<3>>())
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{
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WriteDataSetAsStructured(out, dataSet, cellSet.Cast<vtkm::cont::CellSetStructured<3>>());
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}
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else if (cellSet.IsType<vtkm::cont::CellSetSingleType<>>())
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{
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// these function just like explicit cell sets
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WriteDataSetAsUnstructured(out, dataSet, cellSet.Cast<vtkm::cont::CellSetSingleType<>>());
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}
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else
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{
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throw vtkm::cont::ErrorBadType("Could not determine type to write out.");
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}
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WritePointFields(out, dataSet);
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WriteCellFields(out, dataSet, cellSet);
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}
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}
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public:
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VTKM_CONT
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explicit VTKDataSetWriter(const std::string& filename)
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: FileName(filename)
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{
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}
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VTKM_CONT
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void WriteDataSet(vtkm::cont::DataSet dataSet, vtkm::Id cellSetIndex = 0) const
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{
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if (cellSetIndex >= dataSet.GetNumberOfCellSets())
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{
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if (cellSetIndex == 0)
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{
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// Special case where there are no cell sets. In this case, write out
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// the data as points.
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cellSetIndex = -1;
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}
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else
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{
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throw vtkm::cont::ErrorBadValue("Selected invalid cell set index.");
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}
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}
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if (dataSet.GetNumberOfCoordinateSystems() < 1)
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{
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throw vtkm::cont::ErrorBadValue(
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"DataSet has no coordinate system, which is not supported by VTK file format.");
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}
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try
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{
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std::ofstream fileStream(this->FileName.c_str(), std::fstream::trunc);
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this->Write(fileStream, dataSet, cellSetIndex);
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fileStream.close();
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}
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catch (std::ofstream::failure& error)
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{
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throw vtkm::io::ErrorIO(error.what());
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}
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}
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VTKM_CONT
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void WriteDataSet(vtkm::cont::DataSet dataSet, const std::string& cellSetName)
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{
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this->WriteDataSet(dataSet, dataSet.GetCellSetIndex(cellSetName));
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}
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private:
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std::string FileName;
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}; //struct VTKDataSetWriter
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}
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}
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} //namespace vtkm::io::writer
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#endif //vtk_m_io_writer_DataSetWriter_h
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