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Add PointData::convertInternalData(elementTypeSpecifier) #491

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46 changes: 46 additions & 0 deletions HDPS/src/plugins/PointData/src/PointData.h
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Original file line number Diff line number Diff line change
Expand Up @@ -179,6 +179,24 @@ class POINTDATA_EXPORT PointData : public mv::plugin::RawData
}


/// Converts the internal data if the specified `Index` has the same numerical value as the specified `elementTypeSpecifier`.
template<std::size_t Index>
void convertInternalDataIfIndexEqualsElementTypeSpecifier(const ElementTypeSpecifier elementTypeSpecifier)
{
if (static_cast<ElementTypeSpecifier>(Index) == elementTypeSpecifier)
{
convertInternalData<typename std::variant_alternative_t<Index, VariantOfVectors>::value_type>();
}
}

/// Converts the internal data as specified by the `elementTypeSpecifier`, using an `std::index_sequence`.
template<std::size_t... Indices>
void convertInternalDataUsingIndexSequence(const std::index_sequence<Indices...>, const ElementTypeSpecifier elementTypeSpecifier)
{
(convertInternalDataIfIndexEqualsElementTypeSpecifier<Indices>(elementTypeSpecifier), ...);
}


template <typename DimensionIndex>
void CheckDimensionIndex(const DimensionIndex& dimensionIndex) const
{
Expand Down Expand Up @@ -373,6 +391,34 @@ class POINTDATA_EXPORT PointData : public mv::plugin::RawData
_numDimensions = static_cast<std::uint32_t>(numDimensions);
}

/// Converts the internal data to the specified element data element type, by static_cast.
template <typename T>
void convertInternalData()
{
if (!std::holds_alternative<std::vector<T>>(_variantOfVectors))
{
std::vector<T> convertedData(getSizeOfVector());

std::visit([&convertedData](const auto& vec)
{
std::transform(vec.cbegin(), vec.cend(), convertedData.begin(), [](const auto elem)
{
return static_cast<T>(elem);
});
},
_variantOfVectors);

_variantOfVectors = std::move(convertedData);
}
}


void convertInternalData(const ElementTypeSpecifier elementTypeSpecifier)
{
convertInternalDataUsingIndexSequence(std::make_index_sequence<std::variant_size_v<VariantOfVectors>>{}, elementTypeSpecifier);
}


/// Copies the specified data into the internal data, sets the number of
/// dimensions as specified, and sets the selected internal data type
/// according to the specified data type T.
Expand Down