104 lines
3.4 KiB
C++
104 lines
3.4 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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// 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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// Copyright 2015 Sandia Corporation.
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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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// Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
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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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#ifndef vtkm_m_worklet_Mask_h
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#define vtkm_m_worklet_Mask_h
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#include <vtkm/worklet/DispatcherMapTopology.h>
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#include <vtkm/worklet/WorkletMapTopology.h>
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#include <vtkm/cont/DataSet.h>
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#include <vtkm/cont/CellSetPermutation.h>
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#include <vtkm/cont/ArrayHandle.h>
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#include <vtkm/cont/ArrayHandleCounting.h>
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#include <vtkm/cont/ArrayHandlePermutation.h>
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#include <vtkm/cont/DeviceAdapterAlgorithm.h>
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namespace vtkm {
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namespace worklet {
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// Subselect points using stride for now, creating new cellset of vertices
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class Mask
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{
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public:
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struct BoolType : vtkm::ListTagBase<bool> {};
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template <typename CellSetType,
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typename DeviceAdapter>
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vtkm::cont::CellSetPermutation<CellSetType> Run(
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const CellSetType &cellSet,
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const vtkm::Id stride,
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DeviceAdapter)
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{
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typedef typename vtkm::cont::DeviceAdapterAlgorithm<DeviceAdapter> DeviceAlgorithm;
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typedef vtkm::cont::CellSetPermutation<CellSetType> OutputType;
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vtkm::Id numberOfInputCells = cellSet.GetNumberOfCells();
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vtkm::Id numberOfSampledCells = numberOfInputCells / stride;
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vtkm::cont::ArrayHandleCounting<vtkm::Id> strideArray(0, stride, numberOfSampledCells);
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DeviceAlgorithm::Copy(strideArray, this->ValidCellIds);
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return OutputType(this->ValidCellIds, cellSet, cellSet.GetName());
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}
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// Permute cell data to match permuted cells
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class PermuteCellData
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{
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public:
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PermuteCellData(const vtkm::cont::ArrayHandle<vtkm::Id> validCellIds,
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vtkm::cont::DynamicArrayHandle &data)
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: ValidCellIds(validCellIds), Data(&data)
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{ }
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template <typename ArrayHandleType>
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void operator()(const ArrayHandleType &input) const
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{
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*(this->Data) = vtkm::cont::DynamicArrayHandle(
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vtkm::cont::make_ArrayHandlePermutation(this->ValidCellIds, input));
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}
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private:
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vtkm::cont::ArrayHandle<vtkm::Id> ValidCellIds;
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vtkm::cont::DynamicArrayHandle *Data;
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};
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vtkm::cont::Field ProcessCellField(const vtkm::cont::Field field) const
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{
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if (field.GetAssociation() != vtkm::cont::Field::ASSOC_CELL_SET)
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{
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throw vtkm::cont::ErrorBadValue("Expecting cell field.");
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}
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vtkm::cont::DynamicArrayHandle data;
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CastAndCall(field, PermuteCellData(this->ValidCellIds, data));
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return vtkm::cont::Field(field.GetName(), field.GetAssociation(),
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field.GetAssocCellSet(), data);
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}
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private:
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vtkm::cont::ArrayHandle<vtkm::Id> ValidCellIds;
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};
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}
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} // namespace vtkm::worklet
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#endif // vtkm_m_worklet_Mask_h
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