184 lines
6.5 KiB
C++
184 lines
6.5 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/Assert.h>
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#include <vtkm/CellShape.h>
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#include <vtkm/VecAxisAlignedPointCoordinates.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 typename FieldVecType::ComponentType CellInterpolateImpl(
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VtkcCellShapeTag tag,
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const FieldVecType& field,
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const ParametricCoordType& pcoords,
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const vtkm::exec::FunctorBase& worklet)
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{
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VTKM_ASSERT(tag.numberOfPoints() == field.GetNumberOfComponents());
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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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FieldValueType result(0);
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auto status =
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lcl::interpolate(tag, lcl::makeFieldAccessorNestedSOA(field, numComponents), pcoords, result);
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if (status != lcl::ErrorCode::SUCCESS)
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{
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worklet.RaiseError(lcl::errorString(status));
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}
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return result;
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}
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} // namespace internal
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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 point within the cell, interpolates the field to that point.
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///
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template <typename FieldVecType, typename ParametricCoordType>
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VTKM_EXEC typename FieldVecType::ComponentType CellInterpolate(
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const FieldVecType& pointFieldValues,
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const vtkm::Vec<ParametricCoordType, 3>& parametricCoords,
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vtkm::CellShapeTagGeneric shape,
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const vtkm::exec::FunctorBase& worklet)
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{
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typename FieldVecType::ComponentType result;
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switch (shape.Id)
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{
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vtkmGenericCellShapeMacro(
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result = CellInterpolate(pointFieldValues, parametricCoords, CellShapeTag(), worklet));
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default:
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worklet.RaiseError("Unknown cell shape sent to interpolate.");
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return typename FieldVecType::ComponentType();
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}
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return result;
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}
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//-----------------------------------------------------------------------------
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template <typename FieldVecType, typename ParametricCoordType, typename CellShapeTag>
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VTKM_EXEC typename FieldVecType::ComponentType CellInterpolate(
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const FieldVecType& pointFieldValues,
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const vtkm::Vec<ParametricCoordType, 3>& pcoords,
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CellShapeTag tag,
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const vtkm::exec::FunctorBase& worklet)
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{
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auto lclTag =
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vtkm::internal::make_VtkcCellShapeTag(tag, pointFieldValues.GetNumberOfComponents());
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return internal::CellInterpolateImpl(lclTag, pointFieldValues, pcoords, worklet);
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}
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//-----------------------------------------------------------------------------
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template <typename FieldVecType, typename ParametricCoordType>
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VTKM_EXEC typename FieldVecType::ComponentType CellInterpolate(
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const FieldVecType&,
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const vtkm::Vec<ParametricCoordType, 3>&,
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vtkm::CellShapeTagEmpty,
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const vtkm::exec::FunctorBase& worklet)
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{
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worklet.RaiseError("Attempted to interpolate an empty cell.");
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return typename FieldVecType::ComponentType();
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}
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//-----------------------------------------------------------------------------
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template <typename FieldVecType, typename ParametricCoordType>
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VTKM_EXEC typename FieldVecType::ComponentType CellInterpolate(
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const FieldVecType& field,
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const vtkm::Vec<ParametricCoordType, 3>& pcoords,
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vtkm::CellShapeTagPolyLine,
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const vtkm::exec::FunctorBase& worklet)
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{
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const vtkm::IdComponent numPoints = field.GetNumberOfComponents();
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VTKM_ASSERT(numPoints >= 1);
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if (numPoints == 1)
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{
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return CellInterpolate(field, pcoords, vtkm::CellShapeTagVertex(), worklet);
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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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return field[numPoints - 1];
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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, worklet);
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}
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//-----------------------------------------------------------------------------
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template <typename FieldVecType, typename ParametricCoordType>
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VTKM_EXEC typename FieldVecType::ComponentType CellInterpolate(
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const FieldVecType& field,
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const vtkm::Vec<ParametricCoordType, 3>& pcoords,
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vtkm::CellShapeTagPolygon,
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const vtkm::exec::FunctorBase& worklet)
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{
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const vtkm::IdComponent numPoints = field.GetNumberOfComponents();
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VTKM_ASSERT(numPoints > 0);
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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(), worklet);
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case 2:
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return CellInterpolate(field, pcoords, vtkm::CellShapeTagLine(), worklet);
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default:
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return internal::CellInterpolateImpl(lcl::Polygon(numPoints), field, pcoords, worklet);
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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::Vec3f 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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const vtkm::exec::FunctorBase& worklet)
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{
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return internal::CellInterpolateImpl(lcl::Pixel{}, field, pcoords, worklet);
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}
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//-----------------------------------------------------------------------------
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template <typename ParametricCoordType>
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VTKM_EXEC vtkm::Vec3f 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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const vtkm::exec::FunctorBase& worklet)
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{
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return internal::CellInterpolateImpl(lcl::Voxel{}, field, pcoords, worklet);
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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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