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The initial implementation of `CellInterpolate` takes arguments that are expected from a topology map worklet. However, sometimes you want to interplate cells that are queried from locators or otherwise come from a `WholeCellSet` control signature argument. A new form of `CellInterpolate` is added to handle this case.
229 lines
9.5 KiB
C++
229 lines
9.5 KiB
C++
//============================================================================
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// Copyright (c) Kitware, Inc.
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// All rights reserved.
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// See LICENSE.txt for details.
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//
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// This software is distributed WITHOUT ANY WARRANTY; without even
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// the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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// PURPOSE. See the above copyright notice for more information.
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//============================================================================
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#ifndef vtk_m_exec_Interpolate_h
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#define vtk_m_exec_Interpolate_h
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#include <vtkm/CellShape.h>
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#include <vtkm/ErrorCode.h>
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#include <vtkm/VecAxisAlignedPointCoordinates.h>
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#include <vtkm/VecFromPortalPermute.h>
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#include <vtkm/cont/ArrayHandleUniformPointCoordinates.h>
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#include <vtkm/exec/FunctorBase.h>
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#include <lcl/lcl.h>
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#if (defined(VTKM_GCC) || defined(VTKM_CLANG))
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#pragma GCC diagnostic push
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#pragma GCC diagnostic ignored "-Wconversion"
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#endif // gcc || clang
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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 internal
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{
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template <typename VtkcCellShapeTag, typename FieldVecType, typename ParametricCoordType>
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VTKM_EXEC vtkm::ErrorCode CellInterpolateImpl(VtkcCellShapeTag tag,
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const FieldVecType& field,
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const ParametricCoordType& pcoords,
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typename FieldVecType::ComponentType& result)
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{
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if (tag.numberOfPoints() != field.GetNumberOfComponents())
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{
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result = { 0 };
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return vtkm::ErrorCode::InvalidNumberOfPoints;
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}
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using FieldValueType = typename FieldVecType::ComponentType;
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IdComponent numComponents = vtkm::VecTraits<FieldValueType>::GetNumberOfComponents(field[0]);
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auto status =
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lcl::interpolate(tag, lcl::makeFieldAccessorNestedSOA(field, numComponents), pcoords, result);
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return vtkm::internal::LclErrorToVtkmError(status);
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}
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} // namespace internal
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//-----------------------------------------------------------------------------
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template <typename FieldVecType, typename ParametricCoordType, typename CellShapeTag>
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VTKM_EXEC vtkm::ErrorCode CellInterpolate(const FieldVecType& pointFieldValues,
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const vtkm::Vec<ParametricCoordType, 3>& pcoords,
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CellShapeTag tag,
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typename FieldVecType::ComponentType& result)
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{
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auto lclTag = vtkm::internal::make_LclCellShapeTag(tag, pointFieldValues.GetNumberOfComponents());
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return internal::CellInterpolateImpl(lclTag, pointFieldValues, pcoords, result);
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}
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//-----------------------------------------------------------------------------
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template <typename FieldVecType, typename ParametricCoordType>
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VTKM_EXEC vtkm::ErrorCode CellInterpolate(const FieldVecType&,
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const vtkm::Vec<ParametricCoordType, 3>&,
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vtkm::CellShapeTagEmpty,
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typename FieldVecType::ComponentType& result)
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{
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result = { 0 };
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return vtkm::ErrorCode::OperationOnEmptyCell;
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}
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//-----------------------------------------------------------------------------
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template <typename FieldVecType, typename ParametricCoordType>
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VTKM_EXEC vtkm::ErrorCode CellInterpolate(const FieldVecType& field,
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const vtkm::Vec<ParametricCoordType, 3>& pcoords,
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vtkm::CellShapeTagPolyLine,
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typename FieldVecType::ComponentType& result)
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{
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const vtkm::IdComponent numPoints = field.GetNumberOfComponents();
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if (numPoints < 1)
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{
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result = { 0 };
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return vtkm::ErrorCode::InvalidNumberOfPoints;
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}
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if (numPoints == 1)
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{
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return CellInterpolate(field, pcoords, vtkm::CellShapeTagVertex(), result);
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}
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using T = ParametricCoordType;
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T dt = 1 / static_cast<T>(numPoints - 1);
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vtkm::IdComponent idx = static_cast<vtkm::IdComponent>(pcoords[0] / dt);
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if (idx == numPoints - 1)
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{
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result = field[numPoints - 1];
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return vtkm::ErrorCode::Success;
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}
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T pc = (pcoords[0] - static_cast<T>(idx) * dt) / dt;
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return internal::CellInterpolateImpl(
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lcl::Line{}, vtkm::make_Vec(field[idx], field[idx + 1]), &pc, result);
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}
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//-----------------------------------------------------------------------------
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template <typename FieldVecType, typename ParametricCoordType>
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VTKM_EXEC vtkm::ErrorCode CellInterpolate(const FieldVecType& field,
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const vtkm::Vec<ParametricCoordType, 3>& pcoords,
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vtkm::CellShapeTagPolygon,
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typename FieldVecType::ComponentType& result)
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{
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const vtkm::IdComponent numPoints = field.GetNumberOfComponents();
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if (numPoints < 1)
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{
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result = { 0 };
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return vtkm::ErrorCode::InvalidNumberOfPoints;
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}
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switch (numPoints)
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{
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case 1:
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return CellInterpolate(field, pcoords, vtkm::CellShapeTagVertex(), result);
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case 2:
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return CellInterpolate(field, pcoords, vtkm::CellShapeTagLine(), result);
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default:
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return internal::CellInterpolateImpl(lcl::Polygon(numPoints), field, pcoords, result);
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}
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}
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//-----------------------------------------------------------------------------
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template <typename ParametricCoordType>
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VTKM_EXEC vtkm::ErrorCode CellInterpolate(const vtkm::VecAxisAlignedPointCoordinates<2>& field,
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const vtkm::Vec<ParametricCoordType, 3>& pcoords,
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vtkm::CellShapeTagQuad,
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vtkm::Vec3f& result)
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{
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return internal::CellInterpolateImpl(lcl::Pixel{}, field, pcoords, result);
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}
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//-----------------------------------------------------------------------------
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template <typename ParametricCoordType>
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VTKM_EXEC vtkm::ErrorCode CellInterpolate(const vtkm::VecAxisAlignedPointCoordinates<3>& field,
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const vtkm::Vec<ParametricCoordType, 3>& pcoords,
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vtkm::CellShapeTagHexahedron,
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vtkm::Vec3f& result)
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{
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return internal::CellInterpolateImpl(lcl::Voxel{}, field, pcoords, result);
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}
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//-----------------------------------------------------------------------------
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/// \brief Interpolate a point field in a cell.
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///
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/// Given the point field values for each node and the parametric coordinates
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/// of a location within the cell, interpolates the field to that location.
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///
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/// @param[in] pointFieldValues A list of field values for each point in the cell. This
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/// usually comes from a `FieldInPoint` argument in a
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/// `vtkm::worklet::WorkletVisitCellsWithPoints`.
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/// @param[in] parametricCoords The parametric coordinates where you want to get the interpolated
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/// field value for.
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/// @param[in] shape A tag of type `CellShapeTag*` to identify the shape of the cell.
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/// This method is overloaded for different shape types.
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/// @param[out] result Value to store the interpolated field.
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template <typename FieldVecType, typename ParametricCoordType>
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VTKM_EXEC vtkm::ErrorCode CellInterpolate(const FieldVecType& pointFieldValues,
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const vtkm::Vec<ParametricCoordType, 3>& parametricCoords,
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vtkm::CellShapeTagGeneric shape,
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typename FieldVecType::ComponentType& result)
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{
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vtkm::ErrorCode status;
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switch (shape.Id)
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{
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vtkmGenericCellShapeMacro(
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status = CellInterpolate(pointFieldValues, parametricCoords, CellShapeTag(), result));
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default:
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result = { 0 };
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status = vtkm::ErrorCode::InvalidShapeId;
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}
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return status;
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}
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//-----------------------------------------------------------------------------
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/// @brief Interpolate a point field in a cell.
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///
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/// Given the indices of the points for each node in a `Vec`, a portal to the point
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/// field values, and the parametric coordinates of a location within the cell, interpolates
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/// to that location.
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///
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/// @param[in] pointIndices A list of point indices for each point in the cell. This
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/// usually comes from a `GetIndices()` call on the structure object provided by
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/// a `WholeCellSetIn` argument to a worklet.
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/// @param[in] pointFieldPortal An array portal containing all the values in a point
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/// field array. This usually comes from a `WholeArrayIn` worklet argument.
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/// @param[in] parametricCoords The parametric coordinates where you want to get the
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/// interpolaged field value for.
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/// @param[in] shape A tag of type `CellShapeTag*` to identify the shape of the cell.
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/// @param[out] result Value to store the interpolated field.
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template <typename IndicesVecType,
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typename FieldPortalType,
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typename ParametricCoordType,
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typename CellShapeTag>
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VTKM_EXEC vtkm::ErrorCode CellInterpolate(const IndicesVecType& pointIndices,
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const FieldPortalType& pointFieldPortal,
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const vtkm::Vec<ParametricCoordType, 3>& parametricCoords,
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CellShapeTag shape,
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typename FieldPortalType::ValueType& result)
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{
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return CellInterpolate(vtkm::make_VecFromPortalPermute(&pointIndices, pointFieldPortal),
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parametricCoords,
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shape,
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result);
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}
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}
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} // namespace vtkm::exec
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#if (defined(VTKM_GCC) || defined(VTKM_CLANG))
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#pragma GCC diagnostic pop
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#endif // gcc || clang
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#endif //vtk_m_exec_Interpolate_h
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