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95 lines
3.9 KiB
95 lines
3.9 KiB
7 years ago
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#ifndef Magnum_MeshTools_GenerateNormals_h
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#define Magnum_MeshTools_GenerateNormals_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::generateFlatNormals(), @ref Magnum::MeshTools::generateFlatNormalsInto()
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*/
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#include "Magnum/Magnum.h"
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#include "Magnum/MeshTools/visibility.h"
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#ifdef MAGNUM_BUILD_DEPRECATED
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#include <Corrade/Utility/StlForwardVector.h>
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#include <Corrade/Utility/Macros.h>
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#endif
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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 positions Triangle vertex positions
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@return Per-vertex normals
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All vertices in each triangle face get the same normal vector. Expects that the
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position count is divisible by 3. If you need to generate flat normals for an
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indexed mesh, @ref duplicate() the vertices first, after the operation you
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might want to remove the duplicates again using @ref removeDuplicates().
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Example usage:
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@snippet MagnumMeshTools.cpp generateFlatNormals
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@see @ref generateFlatNormalsInto()
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*/
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MAGNUM_MESHTOOLS_EXPORT Containers::Array<Vector3> generateFlatNormals(const Containers::StridedArrayView1D<const Vector3>& positions);
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/**
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@brief Generate flat normals into an existing array
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@param[in] positions Triangle vertex positions
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@param[out] normals Where to put the generated normals
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A variant of @ref generateFlatNormals() that fills existing memory instead of
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allocating a new array.
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*/
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MAGNUM_MESHTOOLS_EXPORT void generateFlatNormalsInto(const Containers::StridedArrayView1D<const Vector3>& positions, const Containers::StridedArrayView1D<Vector3>& normals);
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#ifdef MAGNUM_BUILD_DEPRECATED
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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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All vertices in each triangle face get the same normal vector. Removes
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duplicates before returning.
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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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@deprecated This will generate index buffer that's different from the input
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@p indices array, so you'll need to recombine them using
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@ref combineIndexedArrays() in order to have a single index array for both
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vertices and normals. Because this makes the usage more complex than
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strictly neccessary, this function is deprecated in favor of
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@ref generateFlatNormals(const Containers::StridedArrayView1D<const Vector3>&).
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*/
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CORRADE_DEPRECATED("use generateFlatNormals(const Containers::StridedArrayView1D<const Vector3>&) instead") std::pair<std::vector<UnsignedInt>, std::vector<Vector3>> MAGNUM_MESHTOOLS_EXPORT generateFlatNormals(const std::vector<UnsignedInt>& indices, const std::vector<Vector3>& positions);
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#endif
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}}
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#endif
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