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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.
98 lines
3.1 KiB
C++
98 lines
3.1 KiB
C++
//=============================================================================
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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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//
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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 National Technology & Engineering Solutions of Sandia, LLC (NTESS).
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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-NA0003525 with NTESS,
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// the U.S. Government retains certain rights in this software.
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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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//=============================================================================
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#ifndef vtk_m_worklet_ScatterUniform_h
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#define vtk_m_worklet_ScatterUniform_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/ArrayHandleImplicit.h>
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namespace vtkm
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{
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namespace worklet
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{
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namespace detail
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{
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template <vtkm::IdComponent Modulus>
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struct FunctorModulus
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{
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VTKM_EXEC_CONT
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vtkm::IdComponent operator()(vtkm::Id index) const
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{
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return static_cast<vtkm::IdComponent>(index % Modulus);
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}
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};
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template <vtkm::IdComponent Divisor>
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struct FunctorDiv
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{
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VTKM_EXEC_CONT
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vtkm::Id operator()(vtkm::Id index) const { return index / Divisor; }
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};
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}
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/// \brief A scatter that maps input to some constant numbers of output.
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///
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/// The \c Scatter classes are responsible for defining how much output is
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/// generated based on some sized input. \c ScatterUniform establishes a 1 to N
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/// mapping from input to output. That is, every input element generates N
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/// elements associated with it where N is the same for every input. The output
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/// elements are grouped by the input associated.
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///
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template <vtkm::IdComponent NumOutputsPerInput>
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struct ScatterUniform
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{
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VTKM_CONT ScatterUniform() = default;
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VTKM_CONT
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vtkm::Id GetOutputRange(vtkm::Id inputRange) const { return inputRange * NumOutputsPerInput; }
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VTKM_CONT
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vtkm::Id GetOutputRange(vtkm::Id3 inputRange) const
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{
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return this->GetOutputRange(inputRange[0] * inputRange[1] * inputRange[2]);
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}
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using OutputToInputMapType =
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vtkm::cont::ArrayHandleImplicit<detail::FunctorDiv<NumOutputsPerInput>>;
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template <typename RangeType>
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VTKM_CONT OutputToInputMapType GetOutputToInputMap(RangeType inputRange) const
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{
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return OutputToInputMapType(detail::FunctorDiv<NumOutputsPerInput>(),
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this->GetOutputRange(inputRange));
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}
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using VisitArrayType =
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vtkm::cont::ArrayHandleImplicit<detail::FunctorModulus<NumOutputsPerInput>>;
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template <typename RangeType>
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VTKM_CONT VisitArrayType GetVisitArray(RangeType inputRange) const
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{
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return VisitArrayType(detail::FunctorModulus<NumOutputsPerInput>(),
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this->GetOutputRange(inputRange));
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}
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};
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}
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} // namespace vtkm::worklet
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#endif //vtk_m_worklet_ScatterUniform_h
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