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 ```
129 lines
4.4 KiB
C++
129 lines
4.4 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/MaskIndices.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/ArrayHandleConstant.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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#include <vtkm/worklet/DispatcherMapTopology.h>
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#include <vtkm/worklet/WorkletMapTopology.h>
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#include <ctime>
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#include <random>
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namespace
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{
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class Worklet : public vtkm::worklet::WorkletVisitPointsWithCells
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{
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public:
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using ControlSignature = void(CellSetIn cellset, FieldInOutPoint outPointId);
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using ExecutionSignature = void(InputIndex, _2);
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using InputDomain = _1;
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using MaskType = vtkm::worklet::MaskIndices;
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VTKM_EXEC void operator()(vtkm::Id pointId, vtkm::Id& outPointId) const { outPointId = pointId; }
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};
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template <typename CellSetType>
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void RunTest(const CellSetType& cellset, const vtkm::cont::ArrayHandle<vtkm::Id>& indices)
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{
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vtkm::Id numPoints = cellset.GetNumberOfPoints();
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vtkm::cont::ArrayHandle<vtkm::Id> outPointId;
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vtkm::cont::ArrayCopy(vtkm::cont::make_ArrayHandleConstant<vtkm::Id>(-1, numPoints), outPointId);
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vtkm::worklet::DispatcherMapTopology<Worklet> dispatcher(vtkm::worklet::MaskIndices{ indices });
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dispatcher.Invoke(cellset, outPointId);
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vtkm::cont::ArrayHandle<vtkm::Int8> stencil;
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vtkm::cont::ArrayCopy(vtkm::cont::make_ArrayHandleConstant<vtkm::Int8>(0, numPoints), stencil);
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// Check that output that should be written was.
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for (vtkm::Id i = 0; i < indices.GetNumberOfValues(); ++i)
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{
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// All unmasked indices should have been copied to the output.
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vtkm::Id unmaskedIndex = indices.GetPortalConstControl().Get(i);
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vtkm::Id writtenValue = outPointId.GetPortalConstControl().Get(unmaskedIndex);
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VTKM_TEST_ASSERT(unmaskedIndex == writtenValue,
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"Did not pass unmasked index. Expected ",
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unmaskedIndex,
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". Got ",
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writtenValue);
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// Mark index as passed.
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stencil.GetPortalControl().Set(unmaskedIndex, 1);
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}
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// Check that output that should not be written was not.
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for (vtkm::Id i = 0; i < numPoints; ++i)
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{
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if (stencil.GetPortalConstControl().Get(i) == 0)
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{
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vtkm::Id foundValue = outPointId.GetPortalConstControl().Get(i);
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VTKM_TEST_ASSERT(foundValue == -1,
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"Expected index ",
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i,
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" to be unwritten but was filled with ",
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foundValue);
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}
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}
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}
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void TestMaskIndices()
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{
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vtkm::cont::DataSet dataset = vtkm::cont::testing::MakeTestDataSet().Make2DUniformDataSet0();
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auto cellset = dataset.GetCellSet();
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vtkm::Id numberOfPoints = cellset.GetNumberOfPoints();
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vtkm::UInt32 seed = static_cast<vtkm::UInt32>(std::time(nullptr));
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std::default_random_engine generator;
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generator.seed(seed);
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std::uniform_int_distribution<vtkm::Id> countDistribution(1, 2 * numberOfPoints);
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std::uniform_int_distribution<vtkm::Id> ptidDistribution(0, numberOfPoints - 1);
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const int iterations = 5;
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std::cout << "Testing with random indices " << iterations << " times\n";
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std::cout << "Seed: " << seed << std::endl;
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for (int i = 1; i <= iterations; ++i)
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{
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std::cout << "iteration: " << i << "\n";
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vtkm::Id count = countDistribution(generator);
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vtkm::cont::ArrayHandle<vtkm::Id> indices;
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indices.Allocate(count);
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// Note that it is possible that the same index will be written twice, which is generally
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// a bad idea with MaskIndices. However, the worklet will write the same value for each
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// instance, so we should still get the correct result.
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auto portal = indices.GetPortalControl();
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std::cout << "using indices:";
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for (vtkm::Id j = 0; j < count; ++j)
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{
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auto val = ptidDistribution(generator);
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std::cout << " " << val;
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portal.Set(j, val);
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}
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std::cout << "\n";
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RunTest(cellset, indices);
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}
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}
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} // anonymous namespace
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int UnitTestMaskIndices(int argc, char* argv[])
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{
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return vtkm::cont::testing::Testing::Run(TestMaskIndices, argc, argv);
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}
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