103 lines
3.2 KiB
C++
103 lines
3.2 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_exec_ConnectivityExplicit_h
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#define vtk_m_exec_ConnectivityExplicit_h
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#include <vtkm/CellType.h>
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#include <vtkm/Types.h>
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#include <vtkm/exec/internal/VecFromPortal.h>
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namespace vtkm {
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namespace exec {
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template<typename ShapePortalType,
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typename NumIndicesPortalType,
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typename ConnectivityPortalType,
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typename IndexOffsetPortalType
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>
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class ConnectivityExplicit
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{
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public:
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ConnectivityExplicit() {}
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ConnectivityExplicit(const ShapePortalType& shapePortal,
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const NumIndicesPortalType& numIndicesPortal,
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const ConnectivityPortalType& connPortal,
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const IndexOffsetPortalType& indexOffsetPortal
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)
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: Shapes(shapePortal),
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NumIndices(numIndicesPortal),
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Connectivity(connPortal),
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IndexOffset(indexOffsetPortal)
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{
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}
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VTKM_EXEC_EXPORT
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vtkm::Id GetNumberOfElements() const
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{
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return this->Shapes.GetNumberOfValues();
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}
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VTKM_EXEC_EXPORT
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vtkm::IdComponent GetNumberOfIndices(vtkm::Id index) const
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{
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// Should the NumIndices array be typed as vtkm::IdComponent instead of
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// vtkm::Id? (NumIndices is really defined in
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// vtkm::cont::internal::ConnectivityExplicitInternals.)
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return static_cast<vtkm::IdComponent>(this->NumIndices.Get(index));
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}
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VTKM_EXEC_EXPORT
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vtkm::CellType GetCellShape(vtkm::Id index) const
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{
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// Likewise, should Shapes be vtkm::Id or something smaller?
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return static_cast<vtkm::CellType>(this->Shapes.Get(index));
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}
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typedef vtkm::exec::internal::VecFromPortal<ConnectivityPortalType>
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IndicesType;
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/// Returns a Vec-like object containing the indices for the given index.
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/// The object returned is not an actual array, but rather an object that
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/// loads the indices lazily out of the connectivity array. This prevents
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/// us from having to know the number of indices at compile time.
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///
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VTKM_EXEC_EXPORT
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IndicesType GetIndices(vtkm::Id index) const
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{
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vtkm::Id offset = this->IndexOffset.Get(index);
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vtkm::IdComponent length = this->GetNumberOfIndices(index);
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return IndicesType(this->Connectivity, length, offset);
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}
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private:
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ShapePortalType Shapes;
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NumIndicesPortalType NumIndices;
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ConnectivityPortalType Connectivity;
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IndexOffsetPortalType IndexOffset;
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};
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} // namespace exec
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} // namespace vtkm
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#endif // vtk_m_exec_ConnectivityExplicit_h
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