mirror of
https://gitlab.kitware.com/vtk/vtk-m
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82 lines
2.5 KiB
C++
82 lines
2.5 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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#ifndef vtk_m_exec_ConnectivityExplicit_h
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#define vtk_m_exec_ConnectivityExplicit_h
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#include <vtkm/CellShape.h>
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#include <vtkm/Types.h>
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#include <vtkm/VecFromPortal.h>
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namespace vtkm
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{
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namespace exec
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{
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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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class ConnectivityExplicit
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{
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public:
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using SchedulingRangeType = vtkm::Id;
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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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: 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
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SchedulingRangeType GetNumberOfElements() const { return this->Shapes.GetNumberOfValues(); }
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using CellShapeTag = vtkm::CellShapeTagGeneric;
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VTKM_EXEC
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CellShapeTag GetCellShape(vtkm::Id index) const { return CellShapeTag(this->Shapes.Get(index)); }
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VTKM_EXEC
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vtkm::IdComponent GetNumberOfIndices(vtkm::Id index) const { return this->NumIndices.Get(index); }
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using IndicesType = vtkm::VecFromPortal<ConnectivityPortalType>;
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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
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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->NumIndices.Get(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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