mirror of
https://gitlab.kitware.com/vtk/vtk-m
synced 2024-10-06 10:29:00 +00:00
63c748f049
This is a fancy array handle that can group entries in another array by arbitrary amounts. This allows us to implement input and output arrays with a different sized Vec for each instance. This is necessary for generating new topologies with cells of different types.
140 lines
4.0 KiB
C++
140 lines
4.0 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_VecFromPortal_h
|
|
#define vtk_m_VecFromPortal_h
|
|
|
|
#include <vtkm/Math.h>
|
|
#include <vtkm/Types.h>
|
|
#include <vtkm/TypeTraits.h>
|
|
#include <vtkm/VecTraits.h>
|
|
|
|
#include <vtkm/internal/ArrayPortalValueReference.h>
|
|
|
|
namespace vtkm {
|
|
|
|
/// \brief A short variable-length array from a window in an ArrayPortal.
|
|
///
|
|
/// The \c VecFromPortal class is a Vec-like class that holds an array portal
|
|
/// and exposes a small window of that portal as if it were a \c Vec.
|
|
///
|
|
template<typename PortalType>
|
|
class VecFromPortal
|
|
{
|
|
public:
|
|
using ComponentType =
|
|
typename std::remove_const<typename PortalType::ValueType>::type;
|
|
|
|
VTKM_SUPPRESS_EXEC_WARNINGS
|
|
VTKM_EXEC_CONT
|
|
VecFromPortal() : NumComponents(0), Offset(0) { }
|
|
|
|
VTKM_SUPPRESS_EXEC_WARNINGS
|
|
VTKM_EXEC_CONT
|
|
VecFromPortal(const PortalType &portal,
|
|
vtkm::IdComponent numComponents = 0,
|
|
vtkm::Id offset = 0)
|
|
: Portal(portal), NumComponents(numComponents), Offset(offset) { }
|
|
|
|
VTKM_EXEC_CONT
|
|
vtkm::IdComponent GetNumberOfComponents() const {
|
|
return this->NumComponents;
|
|
}
|
|
|
|
template<typename T, vtkm::IdComponent DestSize>
|
|
VTKM_EXEC_CONT
|
|
void CopyInto(vtkm::Vec<T,DestSize> &dest) const
|
|
{
|
|
vtkm::IdComponent numComponents = vtkm::Min(DestSize, this->NumComponents);
|
|
for (vtkm::IdComponent index = 0; index < numComponents; index++)
|
|
{
|
|
dest[index] = this->Portal.Get(index + this->Offset);
|
|
}
|
|
}
|
|
|
|
VTKM_SUPPRESS_EXEC_WARNINGS
|
|
VTKM_EXEC_CONT
|
|
vtkm::internal::ArrayPortalValueReference<PortalType>
|
|
operator[](vtkm::IdComponent index) const
|
|
{
|
|
return vtkm::internal::ArrayPortalValueReference<PortalType>(
|
|
this->Portal, index + this->Offset);
|
|
}
|
|
|
|
private:
|
|
PortalType Portal;
|
|
vtkm::IdComponent NumComponents;
|
|
vtkm::Id Offset;
|
|
};
|
|
|
|
template<typename PortalType>
|
|
struct TypeTraits<vtkm::VecFromPortal<PortalType> >
|
|
{
|
|
private:
|
|
typedef typename PortalType::ValueType ComponentType;
|
|
|
|
public:
|
|
typedef typename vtkm::TypeTraits<ComponentType>::NumericTag NumericTag;
|
|
typedef TypeTraitsVectorTag DimensionalityTag;
|
|
|
|
VTKM_SUPPRESS_EXEC_WARNINGS
|
|
VTKM_EXEC_CONT
|
|
static vtkm::VecFromPortal<PortalType> ZeroInitialization()
|
|
{
|
|
return vtkm::VecFromPortal<PortalType>();
|
|
}
|
|
};
|
|
|
|
template<typename PortalType>
|
|
struct VecTraits<vtkm::VecFromPortal<PortalType> >
|
|
{
|
|
typedef vtkm::VecFromPortal<PortalType> VecType;
|
|
|
|
typedef typename VecType::ComponentType ComponentType;
|
|
typedef vtkm::VecTraitsTagMultipleComponents HasMultipleComponents;
|
|
typedef vtkm::VecTraitsTagSizeVariable IsSizeStatic;
|
|
|
|
VTKM_SUPPRESS_EXEC_WARNINGS
|
|
VTKM_EXEC_CONT
|
|
static vtkm::IdComponent GetNumberOfComponents(const VecType &vector) {
|
|
return vector.GetNumberOfComponents();
|
|
}
|
|
|
|
VTKM_SUPPRESS_EXEC_WARNINGS
|
|
VTKM_EXEC_CONT
|
|
static ComponentType GetComponent(const VecType &vector,
|
|
vtkm::IdComponent componentIndex)
|
|
{
|
|
return vector[componentIndex];
|
|
}
|
|
|
|
VTKM_SUPPRESS_EXEC_WARNINGS
|
|
template<vtkm::IdComponent destSize>
|
|
VTKM_EXEC_CONT
|
|
static void CopyInto(const VecType &src,
|
|
vtkm::Vec<ComponentType,destSize> &dest)
|
|
{
|
|
src.CopyInto(dest);
|
|
}
|
|
};
|
|
|
|
} // namespace vtkm
|
|
|
|
#endif //vtk_m_VecFromPortal_h
|