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https://gitlab.kitware.com/vtk/vtk-m
synced 2024-10-05 18:08:59 +00:00
5db762ee71
The `From` and `To` nomenclature for topology mapping has been confusing for both users and developers, especially at lower levels where the intention of mapping attributes from one element to another is easily conflated with the concept of mapping indices (which maps in the exact opposite direction). These identifiers have been renamed to `VisitTopology` and `IncidentTopology` to clarify the direction of the mapping. The order in which these template parameters are specified for `WorkletMapTopology` have also been reversed, since eventually there may be more than one `IncidentTopology`, and having `IncidentTopology` at the end will allow us to replace it with a variadic template parameter pack in the future. Other implementation details supporting these worklets, include `Fetch` tags, `Connectivity` classes, and methods on the various `CellSet` classes (such as `PrepareForInput` have also reversed their template arguments. These will need to be cautiously updated. The convenience implementations of `WorkletMapTopology` have been renamed for clarity as follows: ``` WorkletMapPointToCell --> WorkletVisitCellsWithPoints WorkletMapCellToPoint --> WorkletVisitPointsWithCells ``` The `ControlSignature` tags have been renamed as follows: ``` FieldInTo --> FieldInVisit FieldInFrom --> FieldInMap FromCount --> IncidentElementCount FromIndices --> IncidentElementIndices ```
290 lines
9.1 KiB
C++
290 lines
9.1 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/rendering/raytracing/SphereExtractor.h>
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#include <vtkm/cont/Algorithm.h>
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#include <vtkm/rendering/raytracing/Worklets.h>
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#include <vtkm/worklet/DispatcherMapField.h>
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#include <vtkm/worklet/DispatcherMapTopology.h>
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namespace vtkm
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{
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namespace rendering
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{
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namespace raytracing
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{
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namespace detail
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{
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class CountPoints : public vtkm::worklet::WorkletVisitCellsWithPoints
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{
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public:
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VTKM_CONT
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CountPoints() {}
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typedef void ControlSignature(CellSetIn cellset, FieldOut);
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typedef void ExecutionSignature(CellShape, _2);
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VTKM_EXEC
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void operator()(vtkm::CellShapeTagGeneric shapeType, vtkm::Id& points) const
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{
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if (shapeType.Id == vtkm::CELL_SHAPE_VERTEX)
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points = 1;
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else
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points = 0;
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}
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VTKM_EXEC
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void operator()(vtkm::CellShapeTagHexahedron vtkmNotUsed(shapeType), vtkm::Id& points) const
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{
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points = 0;
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}
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VTKM_EXEC
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void operator()(vtkm::CellShapeTagQuad vtkmNotUsed(shapeType), vtkm::Id& points) const
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{
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points = 0;
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}
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VTKM_EXEC
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void operator()(vtkm::CellShapeTagWedge vtkmNotUsed(shapeType), vtkm::Id& points) const
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{
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points = 0;
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}
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}; // ClassCountPoints
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class Pointify : public vtkm::worklet::WorkletVisitCellsWithPoints
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{
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public:
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VTKM_CONT
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Pointify() {}
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typedef void ControlSignature(CellSetIn cellset, FieldInCell, WholeArrayOut);
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typedef void ExecutionSignature(_2, CellShape, PointIndices, WorkIndex, _3);
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template <typename VecType, typename OutputPortal>
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VTKM_EXEC void operator()(const vtkm::Id& vtkmNotUsed(pointOffset),
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vtkm::CellShapeTagQuad vtkmNotUsed(shapeType),
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const VecType& vtkmNotUsed(cellIndices),
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const vtkm::Id& vtkmNotUsed(cellId),
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OutputPortal& vtkmNotUsed(outputIndices)) const
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{
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}
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template <typename VecType, typename OutputPortal>
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VTKM_EXEC void operator()(const vtkm::Id& vtkmNotUsed(pointOffset),
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vtkm::CellShapeTagWedge vtkmNotUsed(shapeType),
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const VecType& vtkmNotUsed(cellIndices),
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const vtkm::Id& vtkmNotUsed(cellId),
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OutputPortal& vtkmNotUsed(outputIndices)) const
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{
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}
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template <typename VecType, typename OutputPortal>
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VTKM_EXEC void operator()(const vtkm::Id& vtkmNotUsed(pointOffset),
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vtkm::CellShapeTagHexahedron vtkmNotUsed(shapeType),
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const VecType& vtkmNotUsed(cellIndices),
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const vtkm::Id& vtkmNotUsed(cellId),
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OutputPortal& vtkmNotUsed(outputIndices)) const
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{
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}
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template <typename VecType, typename OutputPortal>
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VTKM_EXEC void operator()(const vtkm::Id& pointOffset,
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vtkm::CellShapeTagGeneric shapeType,
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const VecType& vtkmNotUsed(cellIndices),
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const vtkm::Id& cellId,
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OutputPortal& outputIndices) const
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{
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if (shapeType.Id == vtkm::CELL_SHAPE_VERTEX)
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{
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outputIndices.Set(pointOffset, cellId);
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}
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}
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}; //class pointify
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class Iterator : public vtkm::worklet::WorkletMapField
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{
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public:
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VTKM_CONT
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Iterator() {}
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typedef void ControlSignature(FieldOut);
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typedef void ExecutionSignature(_1, WorkIndex);
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VTKM_EXEC
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void operator()(vtkm::Id& index, const vtkm::Id& idx) const { index = idx; }
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}; //class Iterator
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class FieldRadius : public vtkm::worklet::WorkletMapField
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{
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protected:
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vtkm::Float32 MinRadius;
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vtkm::Float32 RadiusDelta;
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vtkm::Float32 MinValue;
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vtkm::Float32 InverseDelta;
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public:
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VTKM_CONT
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FieldRadius(const vtkm::Float32 minRadius,
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const vtkm::Float32 maxRadius,
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const vtkm::Range scalarRange)
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: MinRadius(minRadius)
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, RadiusDelta(maxRadius - minRadius)
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, MinValue(static_cast<vtkm::Float32>(scalarRange.Min))
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{
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vtkm::Float32 delta = static_cast<vtkm::Float32>(scalarRange.Max - scalarRange.Min);
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if (delta != 0.f)
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InverseDelta = 1.f / (delta);
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else
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InverseDelta = 0.f; // just map scalar to 0;
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}
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typedef void ControlSignature(FieldIn, FieldOut, WholeArrayIn);
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typedef void ExecutionSignature(_1, _2, _3);
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template <typename ScalarPortalType>
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VTKM_EXEC void operator()(const vtkm::Id& pointId,
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vtkm::Float32& radius,
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const ScalarPortalType& scalars) const
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{
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vtkm::Float32 scalar = static_cast<vtkm::Float32>(scalars.Get(pointId));
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vtkm::Float32 t = (scalar - MinValue) * InverseDelta;
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radius = MinRadius + t * RadiusDelta;
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}
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}; //class FieldRadius
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} //namespace detail
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void SphereExtractor::ExtractCoordinates(const vtkm::cont::CoordinateSystem& coords,
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const vtkm::Float32 radius)
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{
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this->SetPointIdsFromCoords(coords);
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this->SetUniformRadius(radius);
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}
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void SphereExtractor::ExtractCoordinates(const vtkm::cont::CoordinateSystem& coords,
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const vtkm::cont::Field& field,
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const vtkm::Float32 minRadius,
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const vtkm::Float32 maxRadius)
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{
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this->SetPointIdsFromCoords(coords);
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this->SetVaryingRadius(minRadius, maxRadius, field);
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}
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void SphereExtractor::ExtractCells(const vtkm::cont::DynamicCellSet& cells,
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const vtkm::Float32 radius)
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{
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this->SetPointIdsFromCells(cells);
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this->SetUniformRadius(radius);
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}
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void SphereExtractor::ExtractCells(const vtkm::cont::DynamicCellSet& cells,
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const vtkm::cont::Field& field,
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const vtkm::Float32 minRadius,
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const vtkm::Float32 maxRadius)
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{
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this->SetPointIdsFromCells(cells);
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this->SetVaryingRadius(minRadius, maxRadius, field);
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}
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void SphereExtractor::SetUniformRadius(const vtkm::Float32 radius)
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{
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const vtkm::Id size = this->PointIds.GetNumberOfValues();
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Radii.Allocate(size);
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vtkm::cont::ArrayHandleConstant<vtkm::Float32> radiusHandle(radius, size);
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vtkm::cont::Algorithm::Copy(radiusHandle, Radii);
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}
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void SphereExtractor::SetPointIdsFromCoords(const vtkm::cont::CoordinateSystem& coords)
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{
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vtkm::Id size = coords.GetNumberOfPoints();
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this->PointIds.Allocate(size);
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vtkm::worklet::DispatcherMapField<detail::Iterator>(detail::Iterator()).Invoke(this->PointIds);
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}
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void SphereExtractor::SetPointIdsFromCells(const vtkm::cont::DynamicCellSet& cells)
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{
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using SingleType = vtkm::cont::CellSetSingleType<>;
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vtkm::Id numCells = cells.GetNumberOfCells();
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if (numCells == 0)
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{
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return;
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}
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//
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// look for points in the cell set
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//
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if (cells.IsSameType(vtkm::cont::CellSetExplicit<>()))
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{
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vtkm::cont::ArrayHandle<vtkm::Id> points;
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vtkm::worklet::DispatcherMapTopology<detail::CountPoints>(detail::CountPoints())
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.Invoke(cells, points);
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vtkm::Id totalPoints = 0;
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totalPoints = vtkm::cont::Algorithm::Reduce(points, vtkm::Id(0));
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vtkm::cont::ArrayHandle<vtkm::Id> cellOffsets;
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vtkm::cont::Algorithm::ScanExclusive(points, cellOffsets);
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PointIds.Allocate(totalPoints);
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vtkm::worklet::DispatcherMapTopology<detail::Pointify>(detail::Pointify())
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.Invoke(cells, cellOffsets, this->PointIds);
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}
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else if (cells.IsSameType(SingleType()))
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{
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SingleType pointCells = cells.Cast<SingleType>();
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vtkm::UInt8 shape_id = pointCells.GetCellShape(0);
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if (shape_id == vtkm::CELL_SHAPE_VERTEX)
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{
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this->PointIds.Allocate(numCells);
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vtkm::worklet::DispatcherMapField<detail::Iterator>(detail::Iterator())
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.Invoke(this->PointIds);
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}
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}
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}
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void SphereExtractor::SetVaryingRadius(const vtkm::Float32 minRadius,
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const vtkm::Float32 maxRadius,
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const vtkm::cont::Field& field)
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{
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vtkm::cont::ArrayHandle<vtkm::Range> rangeArray = field.GetRange();
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if (rangeArray.GetNumberOfValues() != 1)
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{
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throw vtkm::cont::ErrorBadValue("Sphere Extractor: scalar field must have one component");
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}
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vtkm::Range range = rangeArray.GetPortalConstControl().Get(0);
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Radii.Allocate(this->PointIds.GetNumberOfValues());
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vtkm::worklet::DispatcherMapField<detail::FieldRadius>(
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detail::FieldRadius(minRadius, maxRadius, range))
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.Invoke(
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this->PointIds, this->Radii, field.GetData().ResetTypes(vtkm::TypeListTagFieldScalar()));
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}
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vtkm::cont::ArrayHandle<vtkm::Id> SphereExtractor::GetPointIds()
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{
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return this->PointIds;
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}
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vtkm::cont::ArrayHandle<vtkm::Float32> SphereExtractor::GetRadii()
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{
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return this->Radii;
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}
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vtkm::Id SphereExtractor::GetNumberOfSpheres() const
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{
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return this->PointIds.GetNumberOfValues();
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}
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}
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}
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} //namespace vtkm::rendering::raytracing
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