55 lines
1.8 KiB
C++
55 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) 2015 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_IN_ELEMENT_H
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#define IGL_IN_ELEMENT_H
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#include "igl_inline.h"
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#include "AABB.h"
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#include <Eigen/Core>
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#include <Eigen/Sparse>
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namespace igl
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{
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// Determine whether each point in a list of points is in the elements of a
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// mesh.
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//
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// templates:
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// DIM dimension of vertices in V (# of columns)
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// Inputs:
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// V #V by dim list of mesh vertex positions.
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// Ele #Ele by dim+1 list of mesh indices into #V.
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// Q #Q by dim list of query point positions
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// aabb axis-aligned bounding box tree object (see AABB.h)
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// Outputs:
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// I #Q list of indices into Ele of first containing element (-1 means no
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// containing element)
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template <typename DerivedV, typename DerivedQ, int DIM>
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IGL_INLINE void in_element(
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const Eigen::PlainObjectBase<DerivedV> & V,
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const Eigen::MatrixXi & Ele,
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const Eigen::PlainObjectBase<DerivedQ> & Q,
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const AABB<DerivedV,DIM> & aabb,
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Eigen::VectorXi & I);
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// Outputs:
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// I #Q by #Ele sparse matrix revealing whether each element contains each
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// point: I(q,e) means point q is in element e
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template <typename DerivedV, typename DerivedQ, int DIM, typename Scalar>
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IGL_INLINE void in_element(
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const Eigen::PlainObjectBase<DerivedV> & V,
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const Eigen::MatrixXi & Ele,
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const Eigen::PlainObjectBase<DerivedQ> & Q,
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const AABB<DerivedV,DIM> & aabb,
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Eigen::SparseMatrix<Scalar> & I);
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};
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#ifndef IGL_STATIC_LIBRARY
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#include "in_element.cpp"
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#endif
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#endif
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