44 lines
1.4 KiB
C
44 lines
1.4 KiB
C
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// This file is part of libigl, a simple c++ geometry processing library.
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//
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// Copyright (C) 2013 Alec Jacobson <alecjacobson@gmail.com>
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//
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// This Source Code Form is subject to the terms of the Mozilla Public License
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// v. 2.0. If a copy of the MPL was not distributed with this file, You can
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// obtain one at http://mozilla.org/MPL/2.0/.
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#ifndef IGL_ORIENT_OUTWARD_H
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#define IGL_ORIENT_OUTWARD_H
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#include "igl_inline.h"
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#include <Eigen/Core>
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namespace igl
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{
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// Orient each component (identified by C) of a mesh (V,F) so the normals on
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// average point away from the patch's centroid.
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//
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// Inputs:
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// V #V by 3 list of vertex positions
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// F #F by 3 list of triangle indices
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// C #F list of components (output of orientable_patches)
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// Outputs:
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// FF #F by 3 list of new triangle indices such that FF(~I,:) = F(~I,:) and
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// FF(I,:) = fliplr(F(I,:)) (OK if &FF = &F)
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// I max(C)+1 list of whether face has been flipped
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template <
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typename DerivedV,
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typename DerivedF,
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typename DerivedC,
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typename DerivedFF,
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typename DerivedI>
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IGL_INLINE void orient_outward(
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const Eigen::PlainObjectBase<DerivedV> & V,
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const Eigen::PlainObjectBase<DerivedF> & F,
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const Eigen::PlainObjectBase<DerivedC> & C,
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Eigen::PlainObjectBase<DerivedFF> & FF,
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Eigen::PlainObjectBase<DerivedI> & I);
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};
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#ifndef IGL_STATIC_LIBRARY
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# include "orient_outward.cpp"
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#endif
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#endif
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