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52 lines
1.8 KiB
C++
52 lines
1.8 KiB
C++
// This file is part of libigl, a simple c++ geometry processing library.
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//
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// Copyright (C) 2014 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_POINT_MESH_SQUARED_DISTANCE_H
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#define IGL_POINT_MESH_SQUARED_DISTANCE_H
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#include "igl_inline.h"
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#include <Eigen/Core>
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#include <vector>
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namespace igl
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{
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// Compute distances from a set of points P to a triangle mesh (V,F)
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//
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// Inputs:
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// P #P by 3 list of query point positions
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// V #V by 3 list of vertex positions
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// Ele #Ele by (3|2|1) list of (triangle|edge|point) indices
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// Outputs:
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// sqrD #P list of smallest squared distances
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// I #P list of primitive indices corresponding to smallest distances
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// C #P by 3 list of closest points
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//
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// Known bugs: This only computes distances to given primitivess. So
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// unreferenced vertices are ignored. However, degenerate primitives are
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// handled correctly: triangle [1 2 2] is treated as a segment [1 2], and
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// triangle [1 1 1] is treated as a point. So one _could_ add extra
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// combinatorially degenerate rows to Ele for all unreferenced vertices to
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// also get distances to points.
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template <
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typename DerivedP,
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typename DerivedV,
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typename DerivedsqrD,
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typename DerivedI,
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typename DerivedC>
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IGL_INLINE void point_mesh_squared_distance(
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const Eigen::PlainObjectBase<DerivedP> & P,
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const Eigen::PlainObjectBase<DerivedV> & V,
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const Eigen::MatrixXi & Ele,
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Eigen::PlainObjectBase<DerivedsqrD> & sqrD,
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Eigen::PlainObjectBase<DerivedI> & I,
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Eigen::PlainObjectBase<DerivedC> & C);
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}
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#ifndef IGL_STATIC_LIBRARY
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# include "point_mesh_squared_distance.cpp"
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#endif
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#endif
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