47 lines
1.3 KiB
C
47 lines
1.3 KiB
C
|
// This file is part of libigl, a simple c++ geometry processing library.
|
||
|
|
//
|
||
|
|
// Copyright (C) 2013 Alec Jacobson <alecjacobson@gmail.com>
|
||
|
|
//
|
||
|
|
// This Source Code Form is subject to the terms of the Mozilla Public License
|
||
|
|
// v. 2.0. If a copy of the MPL was not distributed with this file, You can
|
||
|
|
// obtain one at http://mozilla.org/MPL/2.0/.
|
||
|
|
#ifndef IGL_RAY_SPHERE_INTERSECT_H
|
||
|
|
#define IGL_RAY_SPHERE_INTERSECT_H
|
||
|
|
#include "igl_inline.h"
|
||
|
|
#include <Eigen/Core>
|
||
|
|
namespace igl
|
||
|
|
{
|
||
|
|
// Compute the intersection between a ray from O in direction D and a sphere
|
||
|
|
// centered at C with radius r
|
||
|
|
//
|
||
|
|
// Inputs:
|
||
|
|
// o origin of ray
|
||
|
|
// d direction of ray
|
||
|
|
// c center of sphere
|
||
|
|
// r radius of sphere
|
||
|
|
// Outputs:
|
||
|
|
// t0 parameterization of first hit (set only if exists) so that hit
|
||
|
|
// position = o + t0*d
|
||
|
|
// t1 parameterization of second hit (set only if exists)
|
||
|
|
//
|
||
|
|
// Returns the number of hits
|
||
|
|
template <
|
||
|
|
typename Derivedo,
|
||
|
|
typename Derivedd,
|
||
|
|
typename Derivedc,
|
||
|
|
typename r_type,
|
||
|
|
typename t_type>
|
||
|
|
IGL_INLINE int ray_sphere_intersect(
|
||
|
|
const Eigen::PlainObjectBase<Derivedo> & o,
|
||
|
|
const Eigen::PlainObjectBase<Derivedd> & d,
|
||
|
|
const Eigen::PlainObjectBase<Derivedc> & c,
|
||
|
|
r_type r,
|
||
|
|
t_type & t0,
|
||
|
|
t_type & t1);
|
||
|
|
}
|
||
|
|
#ifndef IGL_STATIC_LIBRARY
|
||
|
|
#include "ray_sphere_intersect.cpp"
|
||
|
|
#endif
|
||
|
|
#endif
|
||
|
|
|