84 lines
2.2 KiB
C++
84 lines
2.2 KiB
C++
// 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_PROJECT_TO_LINE_H
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#define IGL_PROJECT_TO_LINE_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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// PROJECT_TO_LINE project points onto vectors, that is find the parameter
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// t for a point p such that proj_p = (y-x).*t, additionally compute the
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// squared distance from p to the line of the vector, such that
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// |p - proj_p|² = sqr_d
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//
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// [T,sqrD] = project_to_line(P,S,D)
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//
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// Inputs:
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// P #P by dim list of points to be projected
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// S size dim start position of line vector
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// D size dim destination position of line vector
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// Outputs:
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// T #P by 1 list of parameters
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// sqrD #P by 1 list of squared distances
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//
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//
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template <
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typename DerivedP,
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typename DerivedS,
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typename DerivedD,
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typename Derivedt,
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typename DerivedsqrD>
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IGL_INLINE void project_to_line(
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const Eigen::MatrixBase<DerivedP> & P,
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const Eigen::MatrixBase<DerivedS> & S,
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const Eigen::MatrixBase<DerivedD> & D,
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Eigen::PlainObjectBase<Derivedt> & t,
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Eigen::PlainObjectBase<DerivedsqrD> & sqrD);
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// Same as above but for a single query point
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template <typename Scalar>
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IGL_INLINE void project_to_line(
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const Scalar px,
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const Scalar py,
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const Scalar pz,
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const Scalar sx,
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const Scalar sy,
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const Scalar sz,
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const Scalar dx,
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const Scalar dy,
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const Scalar dz,
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Scalar & projpx,
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Scalar & projpy,
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Scalar & projpz,
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Scalar & t,
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Scalar & sqrd);
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// Same as above but for a single query point
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template <typename Scalar>
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IGL_INLINE void project_to_line(
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const Scalar px,
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const Scalar py,
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const Scalar pz,
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const Scalar sx,
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const Scalar sy,
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const Scalar sz,
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const Scalar dx,
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const Scalar dy,
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const Scalar dz,
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Scalar & t,
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Scalar & sqrd);
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}
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#ifndef IGL_STATIC_LIBRARY
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# include "project_to_line.cpp"
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#endif
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#endif
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