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https://gitlab.kitware.com/vtk/vtk-m
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3e1339f9a7
With the major revision 2.0 of VTK-m, many items previously marked as deprecated were removed. If updating to a new version of VTK-m, it is recommended to first update to VTK-m 1.9, which will include the deprecated features but provide warnings (with the right compiler) that will point to the replacement code. Once the deprecations have been fixed, updating to 2.0 should be smoother.
355 lines
11 KiB
C++
355 lines
11 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_CellLocatorBoundingIntervalHierarchy_h
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#define vtk_m_exec_CellLocatorBoundingIntervalHierarchy_h
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#include <vtkm/TopologyElementTag.h>
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#include <vtkm/VecFromPortalPermute.h>
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#include <vtkm/cont/ArrayHandle.h>
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#include <vtkm/cont/CoordinateSystem.h>
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#include <vtkm/exec/CellInside.h>
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#include <vtkm/exec/ParametricCoordinates.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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struct CellLocatorBoundingIntervalHierarchyNode
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{
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#if defined(VTKM_CLANG)
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#pragma GCC diagnostic push
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#pragma GCC diagnostic ignored "-Wnested-anon-types"
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#endif // gcc || clang
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vtkm::IdComponent Dimension;
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vtkm::Id ParentIndex;
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vtkm::Id ChildIndex;
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union {
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struct
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{
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vtkm::FloatDefault LMax;
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vtkm::FloatDefault RMin;
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} Node;
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struct
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{
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vtkm::Id Start;
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vtkm::Id Size;
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} Leaf;
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};
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#if defined(VTKM_CLANG)
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#pragma GCC diagnostic pop
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#endif // gcc || clang
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VTKM_EXEC_CONT
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CellLocatorBoundingIntervalHierarchyNode()
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: Dimension()
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, ParentIndex()
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, ChildIndex()
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, Node{ 0, 0 }
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{
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}
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}; // struct CellLocatorBoundingIntervalHierarchyNode
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template <typename CellSetType>
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class VTKM_ALWAYS_EXPORT CellLocatorBoundingIntervalHierarchy
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{
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using NodeArrayHandle =
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vtkm::cont::ArrayHandle<vtkm::exec::CellLocatorBoundingIntervalHierarchyNode>;
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using CellIdArrayHandle = vtkm::cont::ArrayHandle<vtkm::Id>;
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public:
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VTKM_CONT
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CellLocatorBoundingIntervalHierarchy(
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const NodeArrayHandle& nodes,
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const CellIdArrayHandle& cellIds,
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const CellSetType& cellSet,
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const vtkm::cont::CoordinateSystem::MultiplexerArrayType& coords,
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vtkm::cont::DeviceAdapterId device,
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vtkm::cont::Token& token)
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: Nodes(nodes.PrepareForInput(device, token))
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, CellIds(cellIds.PrepareForInput(device, token))
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, CellSet(cellSet.PrepareForInput(device, VisitType(), IncidentType(), token))
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, Coords(coords.PrepareForInput(device, token))
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{
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}
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struct LastCell
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{
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vtkm::Id CellId = -1;
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vtkm::Id NodeIdx = -1;
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};
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VTKM_EXEC
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vtkm::ErrorCode FindCell(const vtkm::Vec3f& point,
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vtkm::Id& cellId,
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vtkm::Vec3f& parametric) const
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{
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LastCell lastCell;
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return this->FindCellImpl(point, cellId, parametric, lastCell);
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}
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VTKM_EXEC
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vtkm::ErrorCode FindCell(const vtkm::Vec3f& point,
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vtkm::Id& cellId,
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vtkm::Vec3f& parametric,
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LastCell& lastCell) const
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{
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cellId = -1;
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//Check the last cell.
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if ((lastCell.CellId >= 0) && (lastCell.CellId < this->CellSet.GetNumberOfElements()))
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{
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if (this->PointInCell(point, lastCell.CellId, parametric) == vtkm::ErrorCode::Success)
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{
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cellId = lastCell.CellId;
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return vtkm::ErrorCode::Success;
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}
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}
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//Check the last leaf node.
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if ((lastCell.NodeIdx >= 0) && (lastCell.NodeIdx < this->Nodes.GetNumberOfValues()))
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{
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const auto& node = this->Nodes.Get(lastCell.NodeIdx);
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if (node.ChildIndex < 0)
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{
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VTKM_RETURN_ON_ERROR(this->FindInLeaf(point, parametric, node, cellId));
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if (cellId != -1)
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{
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lastCell.CellId = cellId;
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return vtkm::ErrorCode::Success;
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}
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}
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}
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//No fastpath. Do a full search.
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return this->FindCellImpl(point, cellId, parametric, lastCell);
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}
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VTKM_EXEC
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vtkm::ErrorCode FindCellImpl(const vtkm::Vec3f& point,
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vtkm::Id& cellId,
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vtkm::Vec3f& parametric,
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LastCell& lastCell) const
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{
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cellId = -1;
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vtkm::Id nodeIndex = 0;
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FindCellState state = FindCellState::EnterNode;
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while ((cellId < 0) && !((nodeIndex == 0) && (state == FindCellState::AscendFromNode)))
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{
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switch (state)
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{
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case FindCellState::EnterNode:
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VTKM_RETURN_ON_ERROR(
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this->EnterNode(state, point, cellId, nodeIndex, parametric, lastCell));
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break;
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case FindCellState::AscendFromNode:
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this->AscendFromNode(state, nodeIndex);
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break;
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case FindCellState::DescendLeftChild:
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this->DescendLeftChild(state, point, nodeIndex);
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break;
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case FindCellState::DescendRightChild:
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this->DescendRightChild(state, point, nodeIndex);
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break;
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}
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}
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if (cellId >= 0)
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{
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return vtkm::ErrorCode::Success;
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}
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else
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{
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return vtkm::ErrorCode::CellNotFound;
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}
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}
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private:
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enum struct FindCellState
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{
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EnterNode,
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AscendFromNode,
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DescendLeftChild,
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DescendRightChild
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};
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VTKM_EXEC
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vtkm::ErrorCode EnterNode(FindCellState& state,
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const vtkm::Vec3f& point,
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vtkm::Id& cellId,
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vtkm::Id nodeIndex,
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vtkm::Vec3f& parametric,
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LastCell& lastCell) const
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{
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VTKM_ASSERT(state == FindCellState::EnterNode);
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const vtkm::exec::CellLocatorBoundingIntervalHierarchyNode& node = this->Nodes.Get(nodeIndex);
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if (node.ChildIndex < 0)
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{
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// In a leaf node. Look for a containing cell.
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VTKM_RETURN_ON_ERROR(this->FindInLeaf(point, parametric, node, cellId));
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state = FindCellState::AscendFromNode;
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if (cellId != -1)
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{
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lastCell.CellId = cellId;
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lastCell.NodeIdx = nodeIndex;
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}
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}
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else
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{
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state = FindCellState::DescendLeftChild;
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}
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return vtkm::ErrorCode::Success;
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}
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VTKM_EXEC
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void AscendFromNode(FindCellState& state, vtkm::Id& nodeIndex) const
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{
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VTKM_ASSERT(state == FindCellState::AscendFromNode);
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vtkm::Id childNodeIndex = nodeIndex;
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const vtkm::exec::CellLocatorBoundingIntervalHierarchyNode& childNode =
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this->Nodes.Get(childNodeIndex);
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nodeIndex = childNode.ParentIndex;
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const vtkm::exec::CellLocatorBoundingIntervalHierarchyNode& parentNode =
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this->Nodes.Get(nodeIndex);
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if (parentNode.ChildIndex == childNodeIndex)
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{
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// Ascending from left child. Descend into the right child.
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state = FindCellState::DescendRightChild;
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}
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else
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{
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VTKM_ASSERT(parentNode.ChildIndex + 1 == childNodeIndex);
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// Ascending from right child. Ascend again. (Don't need to change state.)
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}
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}
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VTKM_EXEC
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void DescendLeftChild(FindCellState& state, const vtkm::Vec3f& point, vtkm::Id& nodeIndex) const
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{
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VTKM_ASSERT(state == FindCellState::DescendLeftChild);
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const vtkm::exec::CellLocatorBoundingIntervalHierarchyNode& node = this->Nodes.Get(nodeIndex);
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const vtkm::FloatDefault& coordinate = point[node.Dimension];
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if (coordinate <= node.Node.LMax)
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{
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// Left child does contain the point. Do the actual descent.
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nodeIndex = node.ChildIndex;
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state = FindCellState::EnterNode;
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}
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else
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{
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// Left child does not contain the point. Skip to the right child.
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state = FindCellState::DescendRightChild;
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}
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}
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VTKM_EXEC
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void DescendRightChild(FindCellState& state, const vtkm::Vec3f& point, vtkm::Id& nodeIndex) const
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{
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VTKM_ASSERT(state == FindCellState::DescendRightChild);
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const vtkm::exec::CellLocatorBoundingIntervalHierarchyNode& node = this->Nodes.Get(nodeIndex);
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const vtkm::FloatDefault& coordinate = point[node.Dimension];
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if (coordinate >= node.Node.RMin)
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{
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// Right child does contain the point. Do the actual descent.
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nodeIndex = node.ChildIndex + 1;
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state = FindCellState::EnterNode;
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}
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else
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{
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// Right child does not contain the point. Skip to ascent
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state = FindCellState::AscendFromNode;
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}
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}
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VTKM_EXEC vtkm::ErrorCode FindInLeaf(
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const vtkm::Vec3f& point,
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vtkm::Vec3f& parametric,
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const vtkm::exec::CellLocatorBoundingIntervalHierarchyNode& node,
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vtkm::Id& containingCellId) const
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{
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for (vtkm::Id i = node.Leaf.Start; i < node.Leaf.Start + node.Leaf.Size; ++i)
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{
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vtkm::Id cellId = this->CellIds.Get(i);
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if (this->PointInCell(point, cellId, parametric) == vtkm::ErrorCode::Success)
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{
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containingCellId = cellId;
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return vtkm::ErrorCode::Success;
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}
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}
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containingCellId = -1;
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return vtkm::ErrorCode::Success;
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}
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// template <typename CoordsType, typename CellShapeTag>
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VTKM_EXEC vtkm::ErrorCode PointInCell(const vtkm::Vec3f& point,
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vtkm::Id& cellId,
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vtkm::Vec3f& parametric) const
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{
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using IndicesType = typename CellSetPortal::IndicesType;
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IndicesType cellPointIndices = this->CellSet.GetIndices(cellId);
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vtkm::VecFromPortalPermute<IndicesType, CoordsPortal> cellPoints(&cellPointIndices,
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this->Coords);
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auto cellShape = this->CellSet.GetCellShape(cellId);
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bool isInside;
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VTKM_RETURN_ON_ERROR(IsPointInCell(point, parametric, cellShape, cellPoints, isInside));
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if (isInside && vtkm::exec::CellInside(parametric, cellShape))
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return vtkm::ErrorCode::Success;
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return vtkm::ErrorCode::CellNotFound;
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}
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template <typename CoordsType, typename CellShapeTag>
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VTKM_EXEC static vtkm::ErrorCode IsPointInCell(const vtkm::Vec3f& point,
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vtkm::Vec3f& parametric,
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CellShapeTag cellShape,
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const CoordsType& cellPoints,
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bool& isInside)
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{
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isInside = false;
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VTKM_RETURN_ON_ERROR(vtkm::exec::WorldCoordinatesToParametricCoordinates(
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cellPoints, point, cellShape, parametric));
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isInside = vtkm::exec::CellInside(parametric, cellShape);
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return vtkm::ErrorCode::Success;
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}
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using VisitType = vtkm::TopologyElementTagCell;
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using IncidentType = vtkm::TopologyElementTagPoint;
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using NodePortal = typename NodeArrayHandle::ReadPortalType;
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using CellIdPortal = typename CellIdArrayHandle::ReadPortalType;
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using CellSetPortal =
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typename CellSetType::template ExecConnectivityType<VisitType, IncidentType>;
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using CoordsPortal = typename vtkm::cont::CoordinateSystem::MultiplexerArrayType::ReadPortalType;
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NodePortal Nodes;
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CellIdPortal CellIds;
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CellSetPortal CellSet;
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CoordsPortal Coords;
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}; // class CellLocatorBoundingIntervalHierarchy
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} // namespace exec
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} // namespace vtkm
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#endif //vtk_m_exec_CellLocatorBoundingIntervalHierarchy_h
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