47 lines
1.3 KiB
C++
47 lines
1.3 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_RAY_SPHERE_INTERSECT_H
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#define IGL_RAY_SPHERE_INTERSECT_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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// Compute the intersection between a ray from O in direction D and a sphere
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// centered at C with radius r
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//
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// Inputs:
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// o origin of ray
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// d direction of ray
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// c center of sphere
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// r radius of sphere
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// Outputs:
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// t0 parameterization of first hit (set only if exists) so that hit
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// position = o + t0*d
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// t1 parameterization of second hit (set only if exists)
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//
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// Returns the number of hits
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template <
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typename Derivedo,
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typename Derivedd,
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typename Derivedc,
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typename r_type,
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typename t_type>
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IGL_INLINE int ray_sphere_intersect(
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const Eigen::PlainObjectBase<Derivedo> & o,
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const Eigen::PlainObjectBase<Derivedd> & d,
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const Eigen::PlainObjectBase<Derivedc> & c,
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r_type r,
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t_type & t0,
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t_type & t1);
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}
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#ifndef IGL_STATIC_LIBRARY
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#include "ray_sphere_intersect.cpp"
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#endif
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#endif
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