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55 lines
1.7 KiB
55 lines
1.7 KiB
14 years ago
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#ifndef Magnum_MeshTools_GenerateFlatNormals_h
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#define Magnum_MeshTools_GenerateFlatNormals_h
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/*
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Copyright © 2010, 2011, 2012 Vladimír Vondruš <mosra@centrum.cz>
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This file is part of Magnum.
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Magnum is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License version 3
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only, as published by the Free Software Foundation.
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Magnum is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License version 3 for more details.
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*/
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/** @file
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* @brief Function Magnum::MeshTools::generateFlatNormals()
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*/
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#include <tuple>
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#include "Magnum.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 indexes
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@param vertices Vertex array
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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
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std::vector<unsigned int> vertexIndices;
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std::vector<Vector4> vertices;
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std::vector<unsigned int> normalIndices;
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std::vector<Vector3> normals;
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std::tie(normalIndices, normals) = MeshTools::generateFlatNormals(vertexIndices, vertices);
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@endcode
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You can then use combineIndexedArrays() to combine normal and vertex array to
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use the same indices.
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@attention Index count must be divisible by 3, otherwise zero length result
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is generated.
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*/
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std::tuple<std::vector<unsigned int>, std::vector<Vector3>> generateFlatNormals(const std::vector<unsigned int>& indices, const std::vector<Vector4>& vertices);
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}}
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#endif
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