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132 lines
6.4 KiB
132 lines
6.4 KiB
#ifndef Magnum_MaterialTools_RemoveDuplicates_h |
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#define Magnum_MaterialTools_RemoveDuplicates_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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2020, 2021, 2022, 2023 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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/** |
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* @file |
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* @brief Function @ref Magnum::MaterialTools::removeDuplicatesInPlace(), @ref Magnum::MaterialTools::removeDuplicatesInPlaceInto(), @ref Magnum::MaterialTools::removeDuplicates(), @ref Magnum::MaterialTools::removeDuplicatesInto() |
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* @m_since_latest |
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*/ |
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#include <Corrade/Containers/Containers.h> |
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#include "Magnum/MaterialTools/visibility.h" |
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#include "Magnum/Trade/Trade.h" |
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namespace Magnum { namespace MaterialTools { |
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/** |
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@brief Remove duplicate materials from a list in-place |
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@param[in,out] materials List of materials |
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@return Index array to map the original material indices to the output indices |
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and size of the unique prefix in the cleaned up @p materials array |
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@m_since_latest |
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Removes duplicate materials from the input by comparing material types, |
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attribute names, types and values and layer offsets. Floating-point attribute |
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values are compared using fuzzy comparison. Importer state and data flags |
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aren't considered when comparing the materials. Unique materials are shifted to |
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the front with order preserved, the returned mapping array has the same size as |
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the @p materials list and maps from the original indices to prefix of the |
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output. See @ref removeDuplicates() for a variant that doesn't modify the input |
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list in any way but instead returns a mapping array pointing to original data |
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locations. |
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The operation is done in an @f$ \mathcal{O}(n^2 m) @f$ complexity with |
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@f$ n @f$ being the material list size and @f$ m @f$ the per-material attribute |
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count --- every material in the list is compared to all unique materials |
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collected so far. As attributes are sorted in @ref Trade::MaterialData, |
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material comparison is just a linear operation. The function doesn't allocate |
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any temporary memory. |
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The output index array can be passed to @ref SceneTools::mapIndexField() to |
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update a @ref Trade::SceneField::MeshMaterial field to reference only the |
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unique materials. For example: |
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@snippet MagnumMaterialTools.cpp removeDuplicatesInPlace |
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@see @ref removeDuplicatesInPlaceInto() |
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*/ |
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MAGNUM_MATERIALTOOLS_EXPORT Containers::Pair<Containers::Array<UnsignedInt>, std::size_t> removeDuplicatesInPlace(const Containers::Iterable<Trade::MaterialData>& materials); |
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/** |
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@brief Remove duplicate materials from a list in-place and put mapping into given output array |
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@param[in,out] materials List of materials |
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@param[out] mapping Where to put the resulting mapping array |
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@return Size of the unique prefix in the cleaned up @p materials array |
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@m_since_latest |
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Like @ref removeDuplicatesInPlace() but puts the mapping indices into |
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@p mapping instead of allocating a new array. Expects that @p mapping has the |
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same size as @p materials. |
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@see @ref removeDuplicatesInto() |
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*/ |
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MAGNUM_MATERIALTOOLS_EXPORT std::size_t removeDuplicatesInPlaceInto(const Containers::Iterable<Trade::MaterialData>& materials, const Containers::StridedArrayView1D<UnsignedInt>& mapping); |
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/** |
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@brief Remove duplicate materials from a list |
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@param[in] materials List of materials |
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@return Array to map the original material indices to unique materials and size |
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of the unique prefix in the cleaned up @p materials array |
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@m_since_latest |
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Removes duplicate materials from the input by comparing material types, |
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attribute names, types and values and layer offsets. Floating-point attribute |
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values are compared using fuzzy comparison. Importer state and data flags |
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aren't considered when comparing the materials. The returned mapping array has |
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the same size as the @p materials list and maps from the original indices to |
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only unique materials in the input array. See @ref removeDuplicatesInPlace() |
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for a variant that also shifts the unique materials to the front of the list |
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and for a practical usage example. |
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The operation is done in an @f$ \mathcal{O}(n^2 m) @f$ complexity with |
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@f$ n @f$ being the material list size and @f$ m @f$ the per-material attribute |
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count --- every material in the list is compared to all unique materials |
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collected so far, by iterating the filled prefix of the output index list and |
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considering only index for which the index value is the same as the index. As |
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attributes are sorted in @ref Trade::MaterialData, material comparison is just |
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a linear operation. The function doesn't allocate any temporary memory. |
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@see @ref removeDuplicatesInto() |
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*/ |
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MAGNUM_MATERIALTOOLS_EXPORT Containers::Pair<Containers::Array<UnsignedInt>, std::size_t> removeDuplicates(const Containers::Iterable<const Trade::MaterialData>& materials); |
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/** |
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@brief Remove duplicate materials from a list in-place and put mapping into given output array |
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@param[in,out] materials List of materials |
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@param[out] mapping Where to put the resulting mapping array |
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@return Size of the unique prefix in the cleaned up @p materials array |
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@m_since_latest |
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Like @ref removeDuplicates() but puts the mapping indices into @p mapping |
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instead of allocating a new array. Expects that @p mapping has the same size as |
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@p materials. |
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@see @ref removeDuplicatesInPlaceInto() |
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*/ |
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MAGNUM_MATERIALTOOLS_EXPORT std::size_t removeDuplicatesInto(const Containers::Iterable<const Trade::MaterialData>& materials, const Containers::StridedArrayView1D<UnsignedInt>& mapping); |
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}} |
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#endif
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