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98 lines
4.1 KiB
98 lines
4.1 KiB
#ifndef Magnum_MeshTools_Duplicate_h |
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#define Magnum_MeshTools_Duplicate_h |
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/* |
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This file is part of Magnum. |
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Copyright © 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019 |
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Vladimír Vondruš <mosra@centrum.cz> |
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Permission is hereby granted, free of charge, to any person obtaining a |
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copy of this software and associated documentation files (the "Software"), |
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to deal in the Software without restriction, including without limitation |
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the rights to use, copy, modify, merge, publish, distribute, sublicense, |
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and/or sell copies of the Software, and to permit persons to whom the |
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Software is furnished to do so, subject to the following conditions: |
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The above copyright notice and this permission notice shall be included |
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in all copies or substantial portions of the Software. |
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
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THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
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FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER |
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DEALINGS IN THE SOFTWARE. |
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*/ |
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/** @file |
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* @brief Function @ref Magnum::MeshTools::duplicate(), @ref Magnum::MeshTools::duplicateInto() |
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*/ |
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#include <vector> |
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#include <Corrade/Containers/Array.h> |
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#include <Corrade/Containers/ArrayViewStl.h> |
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#include <Corrade/Containers/StridedArrayView.h> |
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#include <Corrade/Utility/Assert.h> |
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#include "Magnum/Magnum.h" |
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namespace Magnum { namespace MeshTools { |
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#ifndef DOXYGEN_GENERATING_OUTPUT |
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/* Fwdecl so we can have duplicateInto() ordered after duplicate() */ |
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template<class IndexType, class T> void duplicateInto(const Containers::StridedArrayView1D<const IndexType>&, const Containers::StridedArrayView1D<const T>&, const Containers::StridedArrayView1D<T>&); |
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#endif |
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/** |
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@brief Duplicate data using given index array |
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Converts indexed array to non-indexed, for example data `{a, b, c, d}` with |
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index array `{1, 1, 0, 3, 2, 2}` will be converted to `{b, b, a, d, c, c}`. |
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The resulting array size is the same as size of @p indices, expects that all |
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indices are in range for the @p data array. |
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If you want to fill an existing memory (or, for example a @ref std::vector), |
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use @ref duplicateInto(). |
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@see @ref removeDuplicates(), @ref combineIndexedArrays() |
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*/ |
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template<class IndexType, class T> Containers::Array<T> duplicate(const Containers::StridedArrayView1D<const IndexType>& indices, const Containers::StridedArrayView1D<const T>& data) { |
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Containers::Array<T> out{Containers::NoInit, indices.size()}; |
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duplicateInto<IndexType, T>(indices, data, out); |
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return out; |
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} |
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/** |
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@brief Duplicate data using an index array into given output array |
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@param[in] indices Index array to use |
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@param[in] data Input data |
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@param[out] out Where to store the output |
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A variant of @ref duplicate() that fills existing memory instead of allocating |
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a new array. |
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*/ |
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template<class IndexType, class T> void duplicateInto(const Containers::StridedArrayView1D<const IndexType>& indices, const Containers::StridedArrayView1D<const T>& data, const Containers::StridedArrayView1D<T>& out) { |
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CORRADE_ASSERT(out.size() == indices.size(), |
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"MeshTools::duplicateInto(): bad output size, expected" << indices.size() << "but got" << out.size(), ); |
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for(std::size_t i = 0; i != indices.size(); ++i) { |
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const std::size_t index = indices[i]; |
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CORRADE_ASSERT(index < data.size(), "MeshTools::duplicateInto(): index" << index << "out of bounds for" << data.size() << "elements", ); |
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out[i] = data[index]; |
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} |
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} |
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/** |
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@brief Duplicate data using given index array |
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Like @ref duplicate(const Containers::StridedArrayView1D<const IndexType>&, const Containers::StridedArrayView1D<const T>&), |
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but putting the result into a @ref std::vector. |
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*/ |
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template<class T> std::vector<T> duplicate(const std::vector<UnsignedInt>& indices, const std::vector<T>& data) { |
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std::vector<T> out(indices.size()); |
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duplicateInto<UnsignedInt, T>(indices, data, out); |
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return out; |
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} |
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}} |
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#endif
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