69 lines
3.0 KiB
C++
69 lines
3.0 KiB
C++
// This file is part of libigl, a simple c++ geometry processing library.
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//
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// Copyright (C) 2015 Olga Diamanti <olga.diam@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_SORT_VECTORS_CCW
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#define IGL_SORT_VECTORS_CCW
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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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// Sorts a set of N coplanar vectors in a ccw order, and returns their order.
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// Optionally it also returns a copy of the ordered vector set, or the indices,
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// in the original unordered set, of the vectors in the ordered set (called here
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// the "inverse" set of indices).
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// Inputs:
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// P 1 by 3N row vector of the vectors to be sorted, stacked horizontally
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// N #1 by 3 normal of the plane where the vectors lie
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// Output:
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// order N by 1 order of the vectors (indices of the unordered vectors into
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// the ordered vector set)
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// sorted 1 by 3N row vector of the ordered vectors, stacked horizontally
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// inv_order N by 1 "inverse" order of the vectors (the indices of the ordered
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// vectors into the unordered vector set)
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//
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template <typename DerivedS, typename DerivedI>
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IGL_INLINE void sort_vectors_ccw(
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const Eigen::PlainObjectBase<DerivedS>& P,
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const Eigen::PlainObjectBase<DerivedS>& N,
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Eigen::PlainObjectBase<DerivedI> &order,
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Eigen::PlainObjectBase<DerivedS> &sorted,
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Eigen::PlainObjectBase<DerivedI> &inv_order);
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template <typename DerivedS, typename DerivedI>
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IGL_INLINE void sort_vectors_ccw(
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const Eigen::PlainObjectBase<DerivedS>& P,
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const Eigen::PlainObjectBase<DerivedS>& N,
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Eigen::PlainObjectBase<DerivedI> &order,
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Eigen::PlainObjectBase<DerivedS> &sorted);
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template <typename DerivedS, typename DerivedI>
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IGL_INLINE void sort_vectors_ccw(
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const Eigen::PlainObjectBase<DerivedS>& P,
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const Eigen::PlainObjectBase<DerivedS>& N,
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Eigen::PlainObjectBase<DerivedI> &order,
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Eigen::PlainObjectBase<DerivedI> &inv_order);
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template <typename DerivedS, typename DerivedI>
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IGL_INLINE void sort_vectors_ccw(
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const Eigen::PlainObjectBase<DerivedS>& P,
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const Eigen::PlainObjectBase<DerivedS>& N,
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Eigen::PlainObjectBase<DerivedI> &order);
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};
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#ifndef IGL_STATIC_LIBRARY
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#include "sort_vectors_ccw.cpp"
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#endif
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#endif /* defined(IGL_FIELD_LOCAL_GLOBAL_CONVERSIONS) */
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