mirror of
https://gitlab.kitware.com/vtk/vtk-m
synced 2024-09-19 18:45:43 +00:00
325 lines
12 KiB
C++
325 lines
12 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_worklet_Probe_h
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#define vtk_m_worklet_Probe_h
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#include <vtkm/cont/ArrayCopy.h>
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#include <vtkm/cont/ArrayHandle.h>
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#include <vtkm/cont/CellLocatorGeneral.h>
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#include <vtkm/exec/CellInside.h>
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#include <vtkm/exec/CellInterpolate.h>
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#include <vtkm/exec/ParametricCoordinates.h>
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#include <vtkm/worklet/DispatcherMapField.h>
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#include <vtkm/worklet/DispatcherMapTopology.h>
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#include <vtkm/worklet/WorkletMapField.h>
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#include <vtkm/worklet/WorkletMapTopology.h>
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#include <vtkm/VecFromPortalPermute.h>
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namespace vtkm
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{
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namespace worklet
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{
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class Probe
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{
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//============================================================================
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public:
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class FindCellWorklet : public vtkm::worklet::WorkletMapField
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{
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public:
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using ControlSignature = void(FieldIn points,
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ExecObject locator,
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FieldOut cellIds,
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FieldOut pcoords);
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using ExecutionSignature = void(_1, _2, _3, _4);
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template <typename LocatorType>
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VTKM_EXEC void operator()(const vtkm::Vec3f& point,
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const LocatorType& locator,
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vtkm::Id& cellId,
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vtkm::Vec3f& pcoords) const
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{
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locator->FindCell(point, cellId, pcoords, *this);
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}
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};
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private:
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template <typename CellSetType, typename PointsType, typename PointsStorage>
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void RunImpl(const CellSetType& cells,
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const vtkm::cont::CoordinateSystem& coords,
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const vtkm::cont::ArrayHandle<PointsType, PointsStorage>& points)
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{
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this->InputCellSet = vtkm::cont::DynamicCellSet(cells);
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vtkm::cont::CellLocatorGeneral locator;
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locator.SetCellSet(this->InputCellSet);
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locator.SetCoordinates(coords);
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locator.Update();
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vtkm::worklet::DispatcherMapField<FindCellWorklet> dispatcher;
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// CellLocatorGeneral is non-copyable. Pass it via a pointer.
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dispatcher.Invoke(points, &locator, this->CellIds, this->ParametricCoordinates);
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}
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//============================================================================
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public:
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class ProbeUniformPoints : public vtkm::worklet::WorkletVisitCellsWithPoints
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{
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public:
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using ControlSignature = void(CellSetIn cellset,
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FieldInPoint coords,
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WholeArrayIn points,
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WholeArrayOut cellIds,
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WholeArrayOut parametricCoords);
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using ExecutionSignature = void(InputIndex, CellShape, _2, _3, _4, _5);
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using InputDomain = _1;
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template <typename CellShapeTag,
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typename CoordsVecType,
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typename UniformPoints,
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typename CellIdsType,
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typename ParametricCoordsType>
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VTKM_EXEC void operator()(vtkm::Id cellId,
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CellShapeTag cellShape,
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const CoordsVecType& cellPoints,
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const UniformPoints& points,
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CellIdsType& cellIds,
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ParametricCoordsType& pcoords) const
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{
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// Compute cell bounds
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using CoordsType = typename vtkm::VecTraits<CoordsVecType>::ComponentType;
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auto numPoints = vtkm::VecTraits<CoordsVecType>::GetNumberOfComponents(cellPoints);
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CoordsType cbmin = cellPoints[0], cbmax = cellPoints[0];
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for (vtkm::IdComponent i = 1; i < numPoints; ++i)
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{
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cbmin = vtkm::Min(cbmin, cellPoints[i]);
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cbmax = vtkm::Max(cbmax, cellPoints[i]);
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}
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// Compute points inside cell bounds
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auto portal = points.GetPortal();
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auto minp =
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static_cast<vtkm::Id3>(vtkm::Ceil((cbmin - portal.GetOrigin()) / portal.GetSpacing()));
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auto maxp =
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static_cast<vtkm::Id3>(vtkm::Floor((cbmax - portal.GetOrigin()) / portal.GetSpacing()));
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// clamp
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minp = vtkm::Max(minp, vtkm::Id3(0));
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maxp = vtkm::Min(maxp, portal.GetDimensions() - vtkm::Id3(1));
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for (vtkm::Id k = minp[2]; k <= maxp[2]; ++k)
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{
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for (vtkm::Id j = minp[1]; j <= maxp[1]; ++j)
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{
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for (vtkm::Id i = minp[0]; i <= maxp[0]; ++i)
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{
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auto pt = portal.Get(vtkm::Id3(i, j, k));
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bool success = false;
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auto pc = vtkm::exec::WorldCoordinatesToParametricCoordinates(
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cellPoints, pt, cellShape, success, *this);
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if (success && vtkm::exec::CellInside(pc, cellShape))
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{
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auto pointId = i + portal.GetDimensions()[0] * (j + portal.GetDimensions()[1] * k);
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cellIds.Set(pointId, cellId);
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pcoords.Set(pointId, pc);
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}
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}
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}
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}
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}
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};
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private:
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template <typename CellSetType>
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void RunImpl(const CellSetType& cells,
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const vtkm::cont::CoordinateSystem& coords,
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const vtkm::cont::ArrayHandleUniformPointCoordinates::Superclass& points)
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{
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this->InputCellSet = vtkm::cont::DynamicCellSet(cells);
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vtkm::cont::ArrayCopy(
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vtkm::cont::make_ArrayHandleConstant(vtkm::Id(-1), points.GetNumberOfValues()),
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this->CellIds);
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this->ParametricCoordinates.Allocate(points.GetNumberOfValues());
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vtkm::worklet::DispatcherMapTopology<ProbeUniformPoints> dispatcher;
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dispatcher.Invoke(cells, coords, points, this->CellIds, this->ParametricCoordinates);
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}
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//============================================================================
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struct RunImplCaller
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{
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template <typename PointsArrayType, typename CellSetType>
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void operator()(const PointsArrayType& points,
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Probe& worklet,
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const CellSetType& cells,
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const vtkm::cont::CoordinateSystem& coords) const
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{
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worklet.RunImpl(cells, coords, points);
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}
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};
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public:
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template <typename CellSetType, typename PointsArrayType>
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void Run(const CellSetType& cells,
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const vtkm::cont::CoordinateSystem& coords,
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const PointsArrayType& points)
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{
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vtkm::cont::CastAndCall(points, RunImplCaller(), *this, cells, coords);
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}
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//============================================================================
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class InterpolatePointField : public vtkm::worklet::WorkletMapField
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{
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public:
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using ControlSignature = void(FieldIn cellIds,
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FieldIn parametricCoords,
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WholeCellSetIn<> inputCells,
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WholeArrayIn inputField,
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FieldOut result);
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using ExecutionSignature = void(_1, _2, _3, _4, _5);
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template <typename ParametricCoordType, typename CellSetType, typename InputFieldPortalType>
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VTKM_EXEC void operator()(vtkm::Id cellId,
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const ParametricCoordType& pc,
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const CellSetType& cells,
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const InputFieldPortalType& in,
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typename InputFieldPortalType::ValueType& out) const
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{
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if (cellId != -1)
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{
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auto indices = cells.GetIndices(cellId);
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auto pointVals = vtkm::make_VecFromPortalPermute(&indices, in);
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out = vtkm::exec::CellInterpolate(pointVals, pc, cells.GetCellShape(cellId), *this);
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}
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}
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};
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/// Intepolate the input point field data at the points of the geometry
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template <typename T,
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typename Storage,
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typename InputCellSetTypeList = VTKM_DEFAULT_CELL_SET_LIST>
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vtkm::cont::ArrayHandle<T> ProcessPointField(
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const vtkm::cont::ArrayHandle<T, Storage>& field,
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InputCellSetTypeList icsTypes = InputCellSetTypeList()) const
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{
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vtkm::cont::ArrayHandle<T> result;
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vtkm::worklet::DispatcherMapField<InterpolatePointField> dispatcher;
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dispatcher.Invoke(this->CellIds,
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this->ParametricCoordinates,
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this->InputCellSet.ResetCellSetList(icsTypes),
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field,
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result);
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return result;
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}
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//============================================================================
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class MapCellField : public vtkm::worklet::WorkletMapField
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{
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public:
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using ControlSignature = void(FieldIn cellIds, WholeArrayIn inputField, FieldOut result);
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using ExecutionSignature = void(_1, _2, _3);
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template <typename InputFieldPortalType>
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VTKM_EXEC void operator()(vtkm::Id cellId,
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const InputFieldPortalType& in,
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typename InputFieldPortalType::ValueType& out) const
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{
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if (cellId != -1)
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{
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out = in.Get(cellId);
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}
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}
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};
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/// Map the input cell field data to the points of the geometry. Each point gets the value
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/// associated with its containing cell. For points that fall on cell edges, the containing
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/// cell is chosen arbitrarily.
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///
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template <typename T, typename Storage>
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vtkm::cont::ArrayHandle<T> ProcessCellField(
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const vtkm::cont::ArrayHandle<T, Storage>& field) const
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{
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vtkm::cont::ArrayHandle<T> result;
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vtkm::worklet::DispatcherMapField<MapCellField> dispatcher;
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dispatcher.Invoke(this->CellIds, field, result);
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return result;
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}
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//============================================================================
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struct HiddenPointsWorklet : public WorkletMapField
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{
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using ControlSignature = void(FieldIn cellids, FieldOut hfield);
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using ExecutionSignature = _2(_1);
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VTKM_EXEC vtkm::UInt8 operator()(vtkm::Id cellId) const { return (cellId == -1) ? HIDDEN : 0; }
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};
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/// Get an array of flags marking the invalid points (points that do not fall inside any of
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/// the cells of the input). The flag value is the same as the HIDDEN flag in VTK and VISIT.
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///
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vtkm::cont::ArrayHandle<vtkm::UInt8> GetHiddenPointsField() const
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{
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vtkm::cont::ArrayHandle<vtkm::UInt8> field;
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vtkm::worklet::DispatcherMapField<HiddenPointsWorklet> dispatcher;
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dispatcher.Invoke(this->CellIds, field);
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return field;
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}
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//============================================================================
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struct HiddenCellsWorklet : public WorkletVisitCellsWithPoints
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{
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using ControlSignature = void(CellSetIn cellset, FieldInPoint cellids, FieldOutCell);
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using ExecutionSignature = _3(_2, PointCount);
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template <typename CellIdsVecType>
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VTKM_EXEC vtkm::UInt8 operator()(const CellIdsVecType& cellIds,
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vtkm::IdComponent numPoints) const
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{
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for (vtkm::IdComponent i = 0; i < numPoints; ++i)
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{
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if (cellIds[i] == -1)
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{
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return HIDDEN;
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}
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}
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return 0;
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}
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};
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/// Get an array of flags marking the invalid cells. Invalid cells are the cells with at least
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/// one invalid point. The flag value is the same as the HIDDEN flag in VTK and VISIT.
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///
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template <typename CellSetType>
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vtkm::cont::ArrayHandle<vtkm::UInt8> GetHiddenCellsField(CellSetType cellset) const
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{
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vtkm::cont::ArrayHandle<vtkm::UInt8> field;
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vtkm::worklet::DispatcherMapTopology<HiddenCellsWorklet> dispatcher;
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dispatcher.Invoke(cellset, this->CellIds, field);
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return field;
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}
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//============================================================================
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private:
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static constexpr vtkm::UInt8 HIDDEN = 2; // from vtk
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vtkm::cont::ArrayHandle<vtkm::Id> CellIds;
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vtkm::cont::ArrayHandle<vtkm::Vec3f> ParametricCoordinates;
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vtkm::cont::DynamicCellSet InputCellSet;
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};
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}
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} // vtkm::worklet
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#endif // vtk_m_worklet_Probe_h
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