f6b13df513
Previously there were issues if the coordinate system was using floating point values that were not FloatDefault. This remedies that issue.
494 lines
14 KiB
C++
494 lines
14 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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//
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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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#include <vtkm/io/VTKDataSetWriter.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/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 <cctype>
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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
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{
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template <typename T>
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using ArrayHandleRectilinearCoordinates =
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vtkm::cont::ArrayHandleCartesianProduct<vtkm::cont::ArrayHandle<T>,
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vtkm::cont::ArrayHandle<T>,
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vtkm::cont::ArrayHandle<T>>;
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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 << '\n';
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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.ReadPortal());
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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 << '\n';
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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.ReadPortal());
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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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template <vtkm::IdComponent DIM>
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void WriteDimensions(std::ostream& out, const vtkm::cont::CellSetStructured<DIM>& cellSet)
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{
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auto pointDimensions = cellSet.GetPointDimensions();
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using VTraits = vtkm::VecTraits<decltype(pointDimensions)>;
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out << "DIMENSIONS ";
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out << VTraits::GetComponent(pointDimensions, 0) << " ";
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out << (DIM > 1 ? VTraits::GetComponent(pointDimensions, 1) : 1) << " ";
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out << (DIM > 2 ? VTraits::GetComponent(pointDimensions, 2) : 1) << "\n";
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}
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void WritePoints(std::ostream& out, const 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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auto cdata = dataSet.GetCoordinateSystem(cindex).GetData();
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std::string typeName;
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vtkm::cont::CastAndCall(cdata, GetDataTypeName(typeName));
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vtkm::Id npoints = cdata.GetNumberOfValues();
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out << "POINTS " << npoints << " " << typeName << " " << '\n';
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cdata.CastAndCall(OutputPointsFunctor{ out });
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}
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template <class CellSetType>
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void WriteExplicitCells(std::ostream& out, const 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 << '\n';
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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.ReadPortal();
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for (int j = 0; j < nids; ++j)
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out << " " << IdPortal.Get(j);
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out << '\n';
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}
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out << "CELL_TYPES " << nCells << '\n';
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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 << '\n';
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}
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}
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void WriteVertexCells(std::ostream& out, const vtkm::cont::DataSet& dataSet)
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{
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vtkm::Id nCells = dataSet.GetCoordinateSystem(0).GetNumberOfPoints();
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out << "CELLS " << nCells << " " << nCells * 2 << '\n';
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for (int i = 0; i < nCells; i++)
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{
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out << "1 " << i << '\n';
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}
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out << "CELL_TYPES " << nCells << '\n';
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for (int i = 0; i < nCells; i++)
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{
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out << vtkm::CELL_SHAPE_VERTEX << '\n';
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}
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}
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void WritePointFields(std::ostream& out, const 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::Association::POINTS)
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{
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continue;
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}
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vtkm::Id npoints = field.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 << '\n';
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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.GetData().ResetTypes(vtkm::TypeListAll{}),
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GetDataTypeName(typeName));
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std::string name = field.GetName();
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for (auto& c : name)
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{
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if (std::isspace(c))
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{
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c = '_';
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}
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}
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out << "SCALARS " << name << " " << typeName << " " << ncomps << '\n';
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out << "LOOKUP_TABLE default" << '\n';
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vtkm::cont::CastAndCall(field.GetData().ResetTypes(vtkm::TypeListAll{}),
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OutputFieldFunctor(out));
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}
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}
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void WriteCellFields(std::ostream& out, const 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.IsFieldCell())
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{
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continue;
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}
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vtkm::Id ncells = field.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 << '\n';
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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.GetData().ResetTypes(vtkm::TypeListAll{}),
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GetDataTypeName(typeName));
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std::string name = field.GetName();
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for (auto& c : name)
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{
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if (std::isspace(c))
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{
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c = '_';
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}
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}
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out << "SCALARS " << name << " " << typeName << " " << ncomps << '\n';
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out << "LOOKUP_TABLE default" << '\n';
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vtkm::cont::CastAndCall(field.GetData().ResetTypes(vtkm::TypeListAll{}),
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OutputFieldFunctor(out));
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}
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}
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void WriteDataSetAsPoints(std::ostream& out, const vtkm::cont::DataSet& dataSet)
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{
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out << "DATASET UNSTRUCTURED_GRID" << '\n';
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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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void WriteDataSetAsUnstructured(std::ostream& out,
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const vtkm::cont::DataSet& dataSet,
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const CellSetType& cellSet)
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{
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out << "DATASET UNSTRUCTURED_GRID" << '\n';
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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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void WriteDataSetAsStructuredPoints(std::ostream& out,
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const vtkm::cont::ArrayHandleUniformPointCoordinates& points,
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const vtkm::cont::CellSetStructured<DIM>& cellSet)
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{
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out << "DATASET STRUCTURED_POINTS\n";
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WriteDimensions(out, cellSet);
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auto portal = points.ReadPortal();
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auto origin = portal.GetOrigin();
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auto spacing = portal.GetSpacing();
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out << "ORIGIN " << origin[0] << " " << origin[1] << " " << origin[2] << "\n";
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out << "SPACING " << spacing[0] << " " << spacing[1] << " " << spacing[2] << "\n";
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}
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template <typename T, vtkm::IdComponent DIM>
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void WriteDataSetAsRectilinearGrid(std::ostream& out,
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const ArrayHandleRectilinearCoordinates<T>& points,
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const vtkm::cont::CellSetStructured<DIM>& cellSet)
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{
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out << "DATASET RECTILINEAR_GRID\n";
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WriteDimensions(out, cellSet);
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std::string typeName = vtkm::io::internal::DataTypeName<T>::Name();
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vtkm::cont::ArrayHandle<T> dimArray;
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dimArray = points.GetStorage().GetFirstArray();
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out << "X_COORDINATES " << dimArray.GetNumberOfValues() << " " << typeName << "\n";
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OutputFieldFunctor{ out }(dimArray);
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dimArray = points.GetStorage().GetSecondArray();
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out << "Y_COORDINATES " << dimArray.GetNumberOfValues() << " " << typeName << "\n";
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OutputFieldFunctor{ out }(dimArray);
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dimArray = points.GetStorage().GetThirdArray();
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out << "Z_COORDINATES " << dimArray.GetNumberOfValues() << " " << typeName << "\n";
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OutputFieldFunctor{ out }(dimArray);
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}
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template <vtkm::IdComponent DIM>
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void WriteDataSetAsStructuredGrid(std::ostream& out,
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const vtkm::cont::DataSet& dataSet,
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const vtkm::cont::CellSetStructured<DIM>& cellSet)
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{
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out << "DATASET STRUCTURED_GRID" << '\n';
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WriteDimensions(out, cellSet);
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WritePoints(out, dataSet);
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}
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template <vtkm::IdComponent DIM>
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void WriteDataSetAsStructured(std::ostream& out,
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const vtkm::cont::DataSet& dataSet,
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const vtkm::cont::CellSetStructured<DIM>& cellSet)
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{
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///\todo: support rectilinear
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// Type of structured grid (uniform, rectilinear, curvilinear) is determined by coordinate system
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auto coordSystem = dataSet.GetCoordinateSystem().GetData();
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if (coordSystem.IsType<vtkm::cont::ArrayHandleUniformPointCoordinates>())
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{
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// uniform is written as "structured points"
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WriteDataSetAsStructuredPoints(
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out, coordSystem.Cast<vtkm::cont::ArrayHandleUniformPointCoordinates>(), cellSet);
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}
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else if (coordSystem.IsType<ArrayHandleRectilinearCoordinates<vtkm::Float32>>())
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{
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WriteDataSetAsRectilinearGrid(
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out, coordSystem.Cast<ArrayHandleRectilinearCoordinates<vtkm::Float32>>(), cellSet);
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}
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else if (coordSystem.IsType<ArrayHandleRectilinearCoordinates<vtkm::Float64>>())
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{
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WriteDataSetAsRectilinearGrid(
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out, coordSystem.Cast<ArrayHandleRectilinearCoordinates<vtkm::Float64>>(), cellSet);
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}
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else
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{
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// Curvilinear is written as "structured grid"
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WriteDataSetAsStructuredGrid(out, dataSet, cellSet);
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}
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}
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void Write(std::ostream& out, const vtkm::cont::DataSet& dataSet, bool just_points = false)
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{
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// The Paraview parser cannot handle scientific notation:
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out << std::fixed;
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out << "# vtk DataFile Version 3.0" << '\n';
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out << "vtk output" << '\n';
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out << "ASCII" << '\n';
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if (just_points)
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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();
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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<1>>())
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{
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WriteDataSetAsStructured(out, dataSet, cellSet.Cast<vtkm::cont::CellSetStructured<1>>());
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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);
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}
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}
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} // anonymous namespace
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namespace vtkm
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{
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namespace io
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{
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VTKDataSetWriter::VTKDataSetWriter(const char* fileName)
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: FileName(fileName)
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{
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}
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VTKDataSetWriter::VTKDataSetWriter(const std::string& fileName)
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: FileName(fileName)
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{
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}
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void VTKDataSetWriter::WriteDataSet(const vtkm::cont::DataSet& dataSet, bool just_points) const
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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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Write(fileStream, dataSet, just_points);
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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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}
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} // namespace vtkm::io
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