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 ```
182 lines
6.3 KiB
C++
182 lines
6.3 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/worklet/DispatcherMapField.h>
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#include <vtkm/worklet/DispatcherMapTopology.h>
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#include <vtkm/worklet/DispatcherPointNeighborhood.h>
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#include <vtkm/worklet/MaskIndices.h>
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#include <vtkm/worklet/ScatterUniform.h>
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#include <vtkm/cont/ArrayCopy.h>
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#include <vtkm/cont/ArrayHandleConstant.h>
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#include <vtkm/cont/ArrayHandleCounting.h>
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#include <vtkm/Math.h>
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#include <vtkm/cont/testing/MakeTestDataSet.h>
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#include <vtkm/cont/testing/Testing.h>
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namespace
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{
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using FieldType = vtkm::Float32;
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#define FieldNull vtkm::Nan32()
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constexpr vtkm::IdComponent IdNull = -2;
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struct FieldWorklet : vtkm::worklet::WorkletMapField
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{
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using ControlSignature = void(WholeCellSetIn<>, // Placeholder for interface consistency
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FieldIn inputField,
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FieldInOut fieldCopy,
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FieldInOut visitCopy);
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using ExecutionSignature = void(_2, VisitIndex, _3, _4);
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using InputDomain = _2;
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using ScatterType = vtkm::worklet::ScatterUniform<2>;
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using MaskType = vtkm::worklet::MaskIndices;
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VTKM_EXEC void operator()(FieldType inField,
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vtkm::IdComponent visitIndex,
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FieldType& fieldCopy,
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vtkm::IdComponent& visitCopy) const
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{
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fieldCopy = inField;
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visitCopy = visitIndex;
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}
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};
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struct TopologyWorklet : vtkm::worklet::WorkletVisitPointsWithCells
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{
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using ControlSignature = void(CellSetIn,
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FieldInPoint inputField,
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FieldInOutPoint fieldCopy,
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FieldInOutPoint visitCopy);
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using ExecutionSignature = void(_2, VisitIndex, _3, _4);
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using InputDomain = _1;
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using ScatterType = vtkm::worklet::ScatterUniform<2>;
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using MaskType = vtkm::worklet::MaskIndices;
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VTKM_EXEC void operator()(FieldType inField,
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vtkm::IdComponent visitIndex,
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FieldType& fieldCopy,
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vtkm::IdComponent& visitCopy) const
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{
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fieldCopy = inField;
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visitCopy = visitIndex;
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}
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};
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struct NeighborhoodWorklet : vtkm::worklet::WorkletPointNeighborhood
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{
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using ControlSignature = void(CellSetIn,
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FieldIn inputField,
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FieldInOut fieldCopy,
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FieldInOut visitCopy);
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using ExecutionSignature = void(_2, VisitIndex, _3, _4);
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using InputDomain = _1;
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using ScatterType = vtkm::worklet::ScatterUniform<2>;
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using MaskType = vtkm::worklet::MaskIndices;
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VTKM_EXEC void operator()(FieldType inField,
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vtkm::IdComponent visitIndex,
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FieldType& fieldCopy,
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vtkm::IdComponent& visitCopy) const
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{
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fieldCopy = inField;
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visitCopy = visitIndex;
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}
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};
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template <typename DispatcherType>
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void TestMapWorklet()
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{
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vtkm::cont::testing::MakeTestDataSet builder;
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vtkm::cont::DataSet data = builder.Make3DUniformDataSet1();
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vtkm::cont::CellSetStructured<3> cellSet =
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data.GetCellSet().Cast<vtkm::cont::CellSetStructured<3>>();
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vtkm::Id numPoints = cellSet.GetNumberOfPoints();
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vtkm::cont::ArrayHandle<FieldType> inField;
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inField.Allocate(numPoints);
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SetPortal(inField.GetPortalControl());
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vtkm::cont::ArrayHandle<FieldType> fieldCopy;
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vtkm::cont::ArrayCopy(vtkm::cont::make_ArrayHandleConstant(FieldNull, numPoints * 2), fieldCopy);
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vtkm::cont::ArrayHandle<vtkm::IdComponent> visitCopy;
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vtkm::cont::ArrayCopy(vtkm::cont::make_ArrayHandleConstant(IdNull, numPoints * 2), visitCopy);
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// The scatter is hardcoded to create 2 outputs for every input.
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// Set up the mask to select a range of values in the middle.
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vtkm::Id maskStart = numPoints / 2;
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vtkm::Id maskEnd = (numPoints * 2) / 3;
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vtkm::worklet::MaskIndices mask(
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vtkm::cont::make_ArrayHandleCounting(maskStart, vtkm::Id(1), maskEnd - maskStart));
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DispatcherType dispatcher(mask);
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dispatcher.Invoke(cellSet, inField, fieldCopy, visitCopy);
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// Check outputs
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auto fieldCopyPortal = fieldCopy.GetPortalConstControl();
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auto visitCopyPortal = visitCopy.GetPortalConstControl();
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for (vtkm::Id outputIndex = 0; outputIndex < numPoints * 2; ++outputIndex)
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{
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FieldType fieldValue = fieldCopyPortal.Get(outputIndex);
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vtkm::IdComponent visitValue = visitCopyPortal.Get(outputIndex);
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if ((outputIndex >= maskStart) && (outputIndex < maskEnd))
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{
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vtkm::Id inputIndex = outputIndex / 2;
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FieldType expectedField = TestValue(inputIndex, FieldType());
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VTKM_TEST_ASSERT(fieldValue == expectedField,
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outputIndex,
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": expected ",
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expectedField,
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", got ",
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fieldValue);
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vtkm::IdComponent expectedVisit = static_cast<vtkm::IdComponent>(outputIndex % 2);
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VTKM_TEST_ASSERT(visitValue == expectedVisit,
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outputIndex,
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": expected ",
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expectedVisit,
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", got ",
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visitValue);
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}
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else
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{
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VTKM_TEST_ASSERT(vtkm::IsNan(fieldValue), outputIndex, ": expected NaN, got ", fieldValue);
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VTKM_TEST_ASSERT(
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visitValue == IdNull, outputIndex, ": expected ", IdNull, ", got ", visitValue);
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}
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}
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}
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void Test()
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{
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std::cout << "Try on WorkletMapField" << std::endl;
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TestMapWorklet<vtkm::worklet::DispatcherMapField<FieldWorklet>>();
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std::cout << "Try on WorkletMapCellToPoint" << std::endl;
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TestMapWorklet<vtkm::worklet::DispatcherMapTopology<TopologyWorklet>>();
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std::cout << "Try on WorkletPointNeighborhood" << std::endl;
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TestMapWorklet<vtkm::worklet::DispatcherPointNeighborhood<NeighborhoodWorklet>>();
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}
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} // anonymous namespace
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int UnitTestScatterAndMask(int argc, char* argv[])
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{
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return vtkm::cont::testing::Testing::Run(Test, argc, argv);
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}
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