119 lines
3.3 KiB
C++
119 lines
3.3 KiB
C++
//=============================================================================
|
|
//
|
|
// Copyright (c) Kitware, Inc.
|
|
// All rights reserved.
|
|
// See LICENSE.txt for details.
|
|
//
|
|
// This software is distributed WITHOUT ANY WARRANTY; without even
|
|
// the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
|
|
// PURPOSE. See the above copyright notice for more information.
|
|
//
|
|
// Copyright 2015 Sandia Corporation.
|
|
// Copyright 2015 UT-Battelle, LLC.
|
|
// Copyright 2015 Los Alamos National Security.
|
|
//
|
|
// Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
|
|
// the U.S. Government retains certain rights in this software.
|
|
// Under the terms of Contract DE-AC52-06NA25396 with Los Alamos National
|
|
// Laboratory (LANL), the U.S. Government retains certain rights in
|
|
// this software.
|
|
//
|
|
//=============================================================================
|
|
#ifndef vtk_m_worklet_ScatterUniform_h
|
|
#define vtk_m_worklet_ScatterUniform_h
|
|
|
|
#include <vtkm/cont/ArrayHandle.h>
|
|
#include <vtkm/cont/ArrayHandleCounting.h>
|
|
#include <vtkm/cont/ArrayHandleImplicit.h>
|
|
|
|
namespace vtkm
|
|
{
|
|
namespace worklet
|
|
{
|
|
|
|
namespace detail
|
|
{
|
|
|
|
struct FunctorModulus
|
|
{
|
|
vtkm::IdComponent Modulus;
|
|
|
|
VTKM_EXEC_CONT
|
|
FunctorModulus(vtkm::IdComponent modulus = 1)
|
|
: Modulus(modulus)
|
|
{
|
|
}
|
|
|
|
VTKM_EXEC_CONT
|
|
vtkm::IdComponent operator()(vtkm::Id index) const
|
|
{
|
|
return static_cast<vtkm::IdComponent>(index % this->Modulus);
|
|
}
|
|
};
|
|
|
|
struct FunctorDiv
|
|
{
|
|
vtkm::Id Divisor;
|
|
|
|
VTKM_EXEC_CONT
|
|
FunctorDiv(vtkm::Id divisor = 1)
|
|
: Divisor(divisor)
|
|
{
|
|
}
|
|
|
|
VTKM_EXEC_CONT
|
|
vtkm::Id operator()(vtkm::Id index) const { return index / this->Divisor; }
|
|
};
|
|
}
|
|
|
|
/// \brief A scatter that maps input to some constant numbers of output.
|
|
///
|
|
/// The \c Scatter classes are responsible for defining how much output is
|
|
/// generated based on some sized input. \c ScatterUniform establishes a 1 to N
|
|
/// mapping from input to output. That is, every input element generates N
|
|
/// elements associated with it where N is the same for every input. The output
|
|
/// elements are grouped by the input associated.
|
|
///
|
|
struct ScatterUniform
|
|
{
|
|
VTKM_CONT
|
|
ScatterUniform(vtkm::IdComponent numOutputsPerInput)
|
|
: NumOutputsPerInput(numOutputsPerInput)
|
|
{
|
|
}
|
|
|
|
VTKM_CONT
|
|
vtkm::Id GetOutputRange(vtkm::Id inputRange) const
|
|
{
|
|
return inputRange * this->NumOutputsPerInput;
|
|
}
|
|
VTKM_CONT
|
|
vtkm::Id GetOutputRange(vtkm::Id3 inputRange) const
|
|
{
|
|
return this->GetOutputRange(inputRange[0] * inputRange[1] * inputRange[2]);
|
|
}
|
|
|
|
typedef vtkm::cont::ArrayHandleImplicit<detail::FunctorDiv> OutputToInputMapType;
|
|
template <typename RangeType>
|
|
VTKM_CONT OutputToInputMapType GetOutputToInputMap(RangeType inputRange) const
|
|
{
|
|
return OutputToInputMapType(detail::FunctorDiv(this->NumOutputsPerInput),
|
|
this->GetOutputRange(inputRange));
|
|
}
|
|
|
|
typedef vtkm::cont::ArrayHandleImplicit<detail::FunctorModulus> VisitArrayType;
|
|
template <typename RangeType>
|
|
VTKM_CONT VisitArrayType GetVisitArray(RangeType inputRange) const
|
|
{
|
|
return VisitArrayType(detail::FunctorModulus(this->NumOutputsPerInput),
|
|
this->GetOutputRange(inputRange));
|
|
}
|
|
|
|
private:
|
|
vtkm::IdComponent NumOutputsPerInput;
|
|
};
|
|
}
|
|
} // namespace vtkm::worklet
|
|
|
|
#endif //vtk_m_worklet_ScatterUniform_h
|