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90 lines
3.4 KiB
90 lines
3.4 KiB
/* |
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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 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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#include "FlipNormals.h" |
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#include <vector> |
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#include <Corrade/Containers/StridedArrayView.h> |
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#include "Magnum/Math/Vector3.h" |
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namespace Magnum { namespace MeshTools { |
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namespace { |
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template<class T> inline void flipFaceWindingInPlaceImplementation(const Containers::StridedArrayView1D<T>& indices) { |
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CORRADE_ASSERT(!(indices.size()%3), "MeshTools::flipNormals(): index count is not divisible by 3!", ); |
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using std::swap; |
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for(std::size_t i = 0; i != indices.size(); i += 3) |
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swap(indices[i+1], indices[i+2]); |
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} |
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} |
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void flipFaceWindingInPlace(const Containers::StridedArrayView1D<UnsignedInt>& indices) { |
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flipFaceWindingInPlaceImplementation(indices); |
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} |
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void flipFaceWindingInPlace(const Containers::StridedArrayView1D<UnsignedShort>& indices) { |
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flipFaceWindingInPlaceImplementation(indices); |
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} |
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void flipFaceWindingInPlace(const Containers::StridedArrayView1D<UnsignedByte>& indices) { |
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flipFaceWindingInPlaceImplementation(indices); |
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} |
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void flipFaceWindingInPlace(const Containers::StridedArrayView2D<char>& indices) { |
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CORRADE_ASSERT(indices.isContiguous<1>(), "MeshTools::flipFaceWindingInPlace(): second index view dimension is not contiguous", ); |
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if(indices.size()[1] == 4) |
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return flipFaceWindingInPlaceImplementation(Containers::arrayCast<1, UnsignedInt>(indices)); |
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else if(indices.size()[1] == 2) |
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return flipFaceWindingInPlaceImplementation(Containers::arrayCast<1, UnsignedShort>(indices)); |
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else { |
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CORRADE_ASSERT(indices.size()[1] == 1, "MeshTools::flipFaceWindingInPlace(): expected index type size 1, 2 or 4 but got" << indices.size()[1], ); |
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return flipFaceWindingInPlaceImplementation(Containers::arrayCast<1, UnsignedByte>(indices)); |
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} |
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} |
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void flipNormalsInPlace(const Containers::StridedArrayView1D<Vector3>& normals) { |
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for(Vector3& normal: normals) |
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normal = -normal; |
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} |
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#ifdef MAGNUM_BUILD_DEPRECATED |
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void flipNormals(std::vector<UnsignedInt>& indices, std::vector<Vector3>& normals) { |
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flipNormalsInPlace(indices, normals); |
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} |
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void flipFaceWinding(std::vector<UnsignedInt>& indices) { |
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flipFaceWindingInPlace(indices); |
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} |
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void flipNormals(std::vector<Vector3>& normals) { |
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flipNormalsInPlace(normals); |
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} |
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#endif |
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}}
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