mirror of
https://gitlab.kitware.com/vtk/vtk-m
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254 lines
9.7 KiB
C++
254 lines
9.7 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_CellEdge_h
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#define vtk_m_exec_CellEdge_h
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#include <vtkm/Assert.h>
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#include <vtkm/CellShape.h>
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#include <vtkm/CellTraits.h>
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#include <vtkm/Types.h>
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#include <vtkm/exec/FunctorBase.h>
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#include <vtkm/internal/Assume.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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namespace detail
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{
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class CellEdgeTables
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{
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public:
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static constexpr vtkm::Int32 MAX_NUM_EDGES = 12;
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public:
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VTKM_EXEC vtkm::Int32 NumEdges(vtkm::Int32 cellShapeId) const
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{
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VTKM_STATIC_CONSTEXPR_ARRAY vtkm::Int32 numEdges[vtkm::NUMBER_OF_CELL_SHAPES] = {
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// NumEdges
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0, // 0: CELL_SHAPE_EMPTY
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0, // 1: CELL_SHAPE_VERTEX
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0, // 2: Unused
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0, // 3: CELL_SHAPE_LINE
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0, // 4: CELL_SHAPE_POLY_LINE
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3, // 5: CELL_SHAPE_TRIANGLE
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0, // 6: Unused
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-1, // 7: CELL_SHAPE_POLYGON ---special case---
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0, // 8: Unused
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4, // 9: CELL_SHAPE_QUAD
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6, // 10: CELL_SHAPE_TETRA
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0, // 11: Unused
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12, // 12: CELL_SHAPE_HEXAHEDRON
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9, // 13: CELL_SHAPE_WEDGE
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8 // 14: CELL_SHAPE_PYRAMID
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};
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return numEdges[cellShapeId];
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}
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VTKM_EXEC vtkm::Int32 PointsInEdge(vtkm::Int32 cellShapeId,
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vtkm::Int32 edgeIndex,
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vtkm::Int32 localPointIndex) const
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{
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VTKM_STATIC_CONSTEXPR_ARRAY vtkm::Int32
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pointsInEdge[vtkm::NUMBER_OF_CELL_SHAPES][MAX_NUM_EDGES][2] = {
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// clang-format off
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// 0: CELL_SHAPE_EMPTY
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{ { -1, -1 }, { -1, -1 }, { -1, -1 }, { -1, -1 }, { -1, -1 }, { -1, -1 },
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{ -1, -1 }, { -1, -1 }, { -1, -1 }, { -1, -1 }, { -1, -1 }, { -1, -1 } },
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// 1: CELL_SHAPE_VERTEX
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{ { -1, -1 }, { -1, -1 }, { -1, -1 }, { -1, -1 }, { -1, -1 }, { -1, -1 },
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{ -1, -1 }, { -1, -1 }, { -1, -1 }, { -1, -1 }, { -1, -1 }, { -1, -1 } },
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// 2: Unused
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{ { -1, -1 }, { -1, -1 }, { -1, -1 }, { -1, -1 }, { -1, -1 }, { -1, -1 },
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{ -1, -1 }, { -1, -1 }, { -1, -1 }, { -1, -1 }, { -1, -1 }, { -1, -1 } },
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// 3: CELL_SHAPE_LINE
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{ { -1, -1 }, { -1, -1 }, { -1, -1 }, { -1, -1 }, { -1, -1 }, { -1, -1 },
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{ -1, -1 }, { -1, -1 }, { -1, -1 }, { -1, -1 }, { -1, -1 }, { -1, -1 } },
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// 4: CELL_SHAPE_POLY_LINE
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{ { -1, -1 }, { -1, -1 }, { -1, -1 }, { -1, -1 }, { -1, -1 }, { -1, -1 },
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{ -1, -1 }, { -1, -1 }, { -1, -1 }, { -1, -1 }, { -1, -1 }, { -1, -1 } },
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// 5: CELL_SHAPE_TRIANGLE
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{ { 0, 1 }, { 1, 2 }, { 2, 0 }, { -1, -1 }, { -1, -1 }, { -1, -1 },
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{ -1, -1 }, { -1, -1 }, { -1, -1 }, { -1, -1 }, { -1, -1 }, { -1, -1 } },
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// 6: Unused
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{ { -1, -1 }, { -1, -1 }, { -1, -1 }, { -1, -1 }, { -1, -1 }, { -1, -1 },
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{ -1, -1 }, { -1, -1 }, { -1, -1 }, { -1, -1 }, { -1, -1 }, { -1, -1 } },
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// 7: CELL_SHAPE_POLYGON --- special case ---
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{ { -1, -1 }, { -1, -1 }, { -1, -1 }, { -1, -1 }, { -1, -1 }, { -1, -1 },
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{ -1, -1 }, { -1, -1 }, { -1, -1 }, { -1, -1 }, { -1, -1 }, { -1, -1 } },
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// 8: Unused
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{ { -1, -1 }, { -1, -1 }, { -1, -1 }, { -1, -1 }, { -1, -1 }, { -1, -1 },
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{ -1, -1 }, { -1, -1 }, { -1, -1 }, { -1, -1 }, { -1, -1 }, { -1, -1 } },
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// 9: CELL_SHAPE_QUAD
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{ { 0, 1 }, { 1, 2 }, { 2, 3 }, { 3, 0 }, { -1, -1 }, { -1, -1 },
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{ -1, -1 }, { -1, -1 }, { -1, -1 }, { -1, -1 }, { -1, -1 }, { -1, -1 } },
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// 10: CELL_SHAPE_TETRA
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{ { 0, 1 }, { 1, 2 }, { 2, 0 }, { 0, 3 }, { 1, 3 }, { 2, 3 },
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{ -1, -1 }, { -1, -1 }, { -1, -1 }, { -1, -1 }, { -1, -1 }, { -1, -1 } },
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// 11: Unused
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{ { -1, -1 }, { -1, -1 }, { -1, -1 }, { -1, -1 }, { -1, -1 }, { -1, -1 },
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{ -1, -1 }, { -1, -1 }, { -1, -1 }, { -1, -1 }, { -1, -1 }, { -1, -1 } },
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// 12: CELL_SHAPE_HEXAHEDRON
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{ { 0, 1 }, { 1, 2 }, { 3, 2 }, { 0, 3 }, { 4, 5 }, { 5, 6 },
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{ 7, 6 }, { 4, 7 }, { 0, 4 }, { 1, 5 }, { 3, 7 }, { 2, 6 } },
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// 13: CELL_SHAPE_WEDGE
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{ { 0, 1 }, { 1, 2 }, { 2, 0 }, { 3, 4 }, { 4, 5 }, { 5, 3 },
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{ 0, 3 }, { 1, 4 }, { 2, 5 }, { -1, -1 }, { -1, -1 }, { -1, -1 } },
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// 14: CELL_SHAPE_PYRAMID
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{ { 0, 1 }, { 1, 2 }, { 2, 3 }, { 3, 0 }, { 0, 4 }, { 1, 4 },
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{ 2, 4 }, { 3, 4 }, { -1, -1 }, { -1, -1 }, { -1, -1 }, { -1, -1 } }
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// clang-format on
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};
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return pointsInEdge[cellShapeId][edgeIndex][localPointIndex];
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}
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};
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} // namespace detail
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template <typename CellShapeTag>
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static inline VTKM_EXEC vtkm::IdComponent CellEdgeNumberOfEdges(vtkm::IdComponent numPoints,
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CellShapeTag,
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const vtkm::exec::FunctorBase&)
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{
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(void)numPoints; // Silence compiler warnings.
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VTKM_ASSERT(numPoints == vtkm::CellTraits<CellShapeTag>::NUM_POINTS);
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return detail::CellEdgeTables{}.NumEdges(CellShapeTag::Id);
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}
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static inline VTKM_EXEC vtkm::IdComponent CellEdgeNumberOfEdges(vtkm::IdComponent numPoints,
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vtkm::CellShapeTagPolygon,
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const vtkm::exec::FunctorBase&)
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{
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VTKM_ASSUME(numPoints > 0);
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return numPoints;
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}
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static inline VTKM_EXEC vtkm::IdComponent CellEdgeNumberOfEdges(
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vtkm::IdComponent numPoints,
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vtkm::CellShapeTagGeneric shape,
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const vtkm::exec::FunctorBase& worklet)
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{
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if (shape.Id == vtkm::CELL_SHAPE_POLYGON)
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{
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return CellEdgeNumberOfEdges(numPoints, vtkm::CellShapeTagPolygon(), worklet);
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}
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else
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{
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return detail::CellEdgeTables{}.NumEdges(shape.Id);
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}
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}
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template <typename CellShapeTag>
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static inline VTKM_EXEC vtkm::IdComponent CellEdgeLocalIndex(vtkm::IdComponent numPoints,
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vtkm::IdComponent pointIndex,
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vtkm::IdComponent edgeIndex,
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CellShapeTag shape,
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const vtkm::exec::FunctorBase& worklet)
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{
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VTKM_ASSUME(pointIndex >= 0);
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VTKM_ASSUME(pointIndex < 2);
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VTKM_ASSUME(edgeIndex >= 0);
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VTKM_ASSUME(edgeIndex < detail::CellEdgeTables::MAX_NUM_EDGES);
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if (edgeIndex >= vtkm::exec::CellEdgeNumberOfEdges(numPoints, shape, worklet))
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{
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worklet.RaiseError("Invalid edge number.");
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return 0;
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}
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detail::CellEdgeTables table;
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return table.PointsInEdge(CellShapeTag::Id, edgeIndex, pointIndex);
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}
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static inline VTKM_EXEC vtkm::IdComponent CellEdgeLocalIndex(vtkm::IdComponent numPoints,
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vtkm::IdComponent pointIndex,
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vtkm::IdComponent edgeIndex,
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vtkm::CellShapeTagPolygon,
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const vtkm::exec::FunctorBase&)
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{
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VTKM_ASSUME(numPoints >= 3);
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VTKM_ASSUME(pointIndex >= 0);
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VTKM_ASSUME(pointIndex < 2);
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VTKM_ASSUME(edgeIndex >= 0);
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VTKM_ASSUME(edgeIndex < numPoints);
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if (edgeIndex + pointIndex < numPoints)
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{
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return edgeIndex + pointIndex;
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}
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else
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{
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return 0;
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}
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}
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static inline VTKM_EXEC vtkm::IdComponent CellEdgeLocalIndex(vtkm::IdComponent numPoints,
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vtkm::IdComponent pointIndex,
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vtkm::IdComponent edgeIndex,
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vtkm::CellShapeTagGeneric shape,
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const vtkm::exec::FunctorBase& worklet)
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{
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VTKM_ASSUME(pointIndex >= 0);
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VTKM_ASSUME(pointIndex < 2);
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VTKM_ASSUME(edgeIndex >= 0);
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VTKM_ASSUME(edgeIndex < detail::CellEdgeTables::MAX_NUM_EDGES);
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if (shape.Id == vtkm::CELL_SHAPE_POLYGON)
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{
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return CellEdgeLocalIndex(
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numPoints, pointIndex, edgeIndex, vtkm::CellShapeTagPolygon(), worklet);
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}
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else
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{
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detail::CellEdgeTables table;
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if (edgeIndex >= table.NumEdges(shape.Id))
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{
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worklet.RaiseError("Invalid edge number.");
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return 0;
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}
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return table.PointsInEdge(shape.Id, edgeIndex, pointIndex);
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}
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}
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/// \brief Returns a canonical identifier for a cell edge
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///
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/// Given information about a cell edge and the global point indices for that cell, returns a
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/// vtkm::Id2 that contains values that are unique to that edge. The values for two edges will be
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/// the same if and only if the edges contain the same points.
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///
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template <typename CellShapeTag, typename GlobalPointIndicesVecType>
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static inline VTKM_EXEC vtkm::Id2 CellEdgeCanonicalId(
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vtkm::IdComponent numPoints,
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vtkm::IdComponent edgeIndex,
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CellShapeTag shape,
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const GlobalPointIndicesVecType& globalPointIndicesVec,
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const vtkm::exec::FunctorBase& worklet)
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{
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vtkm::Id pointIndex0 =
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globalPointIndicesVec[vtkm::exec::CellEdgeLocalIndex(numPoints, 0, edgeIndex, shape, worklet)];
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vtkm::Id pointIndex1 =
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globalPointIndicesVec[vtkm::exec::CellEdgeLocalIndex(numPoints, 1, edgeIndex, shape, worklet)];
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if (pointIndex0 < pointIndex1)
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{
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return vtkm::Id2(pointIndex0, pointIndex1);
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}
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else
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{
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return vtkm::Id2(pointIndex1, pointIndex0);
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}
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}
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}
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} // namespace vtkm::exec
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#endif //vtk_m_exec_CellFaces_h
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