2016-05-13 18:26:59 +00:00
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//============================================================================
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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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// 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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2017-09-20 21:33:44 +00:00
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// Copyright 2015 National Technology & Engineering Solutions of Sandia, LLC (NTESS).
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2016-05-13 18:26:59 +00:00
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// Copyright 2015 UT-Battelle, LLC.
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// Copyright 2015 Los Alamos National Security.
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//
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2017-09-20 21:33:44 +00:00
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// Under the terms of Contract DE-NA0003525 with NTESS,
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2016-05-13 18:26:59 +00:00
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// the U.S. Government retains certain rights in this software.
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//
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// Under the terms of Contract DE-AC52-06NA25396 with Los Alamos National
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// Laboratory (LANL), the U.S. Government retains certain rights in
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// this software.
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//============================================================================
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2017-03-23 17:58:00 +00:00
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#ifndef vtk_m_worklet_TriangulateStructured_h
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#define vtk_m_worklet_TriangulateStructured_h
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2016-05-13 18:26:59 +00:00
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#include <vtkm/cont/ArrayHandle.h>
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#include <vtkm/cont/ArrayHandleGroupVec.h>
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#include <vtkm/cont/CellSetSingleType.h>
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#include <vtkm/cont/CellSetStructured.h>
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#include <vtkm/cont/DataSet.h>
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#include <vtkm/cont/DeviceAdapter.h>
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#include <vtkm/cont/DynamicArrayHandle.h>
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2017-01-09 21:15:32 +00:00
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#include <vtkm/cont/ErrorBadValue.h>
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#include <vtkm/cont/Field.h>
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#include <vtkm/worklet/DispatcherMapTopology.h>
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#include <vtkm/worklet/ScatterUniform.h>
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#include <vtkm/worklet/WorkletMapTopology.h>
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2017-05-18 14:29:41 +00:00
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namespace vtkm
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{
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namespace worklet
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{
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2018-02-21 19:51:15 +00:00
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namespace triangulate
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{
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//
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// Worklet to turn quads into triangles
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// Vertices remain the same and each cell is processed with needing topology
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//
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class TriangulateCell : public vtkm::worklet::WorkletMapPointToCell
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{
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public:
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2018-05-25 21:18:41 +00:00
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using ControlSignature = void(CellSetIn cellset, FieldOutCell<> connectivityOut);
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using ExecutionSignature = void(PointIndices, _2, VisitIndex);
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2018-02-21 19:51:15 +00:00
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using InputDomain = _1;
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Move Scatter from Worklet to Dispatcher
Previously, when a Worklet needed a scatter, the scatter object was
stored in the Worklet object. That was problematic because that means
the Scatter, which is a control object, was shoved into the execution
environment.
To prevent that, move the Scatter into the Dispatcher object. The
worklet still declares a ScatterType alias, but no longer has a
GetScatter method. Instead, the Dispatcher now takes a Scatter object in
its constructor. If using the default scatter (ScatterIdentity), the
default constructor is used. If using another type of Scatter that
requires data to set up its state, then the caller of the worklet needs
to provide that to the dispatcher. For convenience, worklets are
encouraged to have a MakeScatter method to help construct a proper
scatter object.
2018-04-27 04:43:51 +00:00
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using ScatterType = vtkm::worklet::ScatterUniform<2>;
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// Each quad cell produces 2 triangle cells
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template <typename ConnectivityInVec, typename ConnectivityOutVec>
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VTKM_EXEC void operator()(const ConnectivityInVec& connectivityIn,
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ConnectivityOutVec& connectivityOut,
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vtkm::IdComponent visitIndex) const
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{
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VTKM_STATIC_CONSTEXPR_ARRAY vtkm::IdComponent StructuredTriangleIndices[2][3] = { { 0, 1, 2 },
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{ 0, 2, 3 } };
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connectivityOut[0] = connectivityIn[StructuredTriangleIndices[visitIndex][0]];
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connectivityOut[1] = connectivityIn[StructuredTriangleIndices[visitIndex][1]];
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connectivityOut[2] = connectivityIn[StructuredTriangleIndices[visitIndex][2]];
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}
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};
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}
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/// \brief Compute the triangulate cells for a uniform grid data set
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template <typename DeviceAdapter>
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class TriangulateStructured
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{
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public:
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template <typename CellSetType>
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vtkm::cont::CellSetSingleType<> Run(const CellSetType& cellSet,
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vtkm::cont::ArrayHandle<vtkm::IdComponent>& outCellsPerCell)
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2017-03-24 22:34:53 +00:00
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2016-05-13 18:26:59 +00:00
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{
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2018-02-22 13:29:13 +00:00
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using DeviceAlgorithm = vtkm::cont::DeviceAdapterAlgorithm<DeviceAdapter>;
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vtkm::cont::CellSetSingleType<> outCellSet(cellSet.GetName());
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vtkm::cont::ArrayHandle<vtkm::Id> connectivity;
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vtkm::worklet::DispatcherMapTopology<triangulate::TriangulateCell, DeviceAdapter> dispatcher;
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dispatcher.Invoke(cellSet, vtkm::cont::make_ArrayHandleGroupVec<3>(connectivity));
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2017-03-24 22:34:53 +00:00
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// Fill in array of output cells per input cell
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DeviceAlgorithm::Copy(
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vtkm::cont::ArrayHandleConstant<vtkm::IdComponent>(2, cellSet.GetNumberOfCells()),
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outCellsPerCell);
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// Add cells to output cellset
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outCellSet.Fill(cellSet.GetNumberOfPoints(), vtkm::CellShapeTagTriangle::Id, 3, connectivity);
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return outCellSet;
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}
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};
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}
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} // namespace vtkm::worklet
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2017-03-23 17:58:00 +00:00
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#endif // vtk_m_worklet_TriangulateStructured_h
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