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68 lines
2.4 KiB
68 lines
2.4 KiB
#ifndef Magnum_MeshTools_GenerateFlatNormals_h |
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#define Magnum_MeshTools_GenerateFlatNormals_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 |
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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::generateFlatNormals() |
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*/ |
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#include <tuple> |
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#include <vector> |
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#include "Magnum/Magnum.h" |
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#include "Magnum/MeshTools/visibility.h" |
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namespace Magnum { namespace MeshTools { |
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/** |
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@brief Generate flat normals |
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@param indices Array of triangle face indices |
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@param positions Array of vertex positions |
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@return Normal indices and vectors |
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For each face generates one normal vector, removes duplicates before |
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returning. Example usage: |
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@code{.cpp} |
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std::vector<UnsignedInt> vertexIndices; |
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std::vector<Vector3> positions; |
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std::vector<UnsignedInt> normalIndices; |
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std::vector<Vector3> normals; |
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std::tie(normalIndices, normals) = MeshTools::generateFlatNormals(vertexIndices, positions); |
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@endcode |
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You can then use @ref combineIndexedArrays() to combine normal and vertex array |
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to use the same indices. |
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@attention The function requires the mesh to have triangle faces, thus index |
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count must be divisible by 3. |
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*/ |
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std::tuple<std::vector<UnsignedInt>, std::vector<Vector3>> MAGNUM_MESHTOOLS_EXPORT generateFlatNormals(const std::vector<UnsignedInt>& indices, const std::vector<Vector3>& positions); |
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}} |
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#endif
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