/usr/include/simgear/math/SGPlane.hxx is in libsimgear-dev 3.0.0-6+b2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 | // Copyright (C) 2006 Mathias Froehlich - Mathias.Froehlich@web.de
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Library General Public
// License as published by the Free Software Foundation; either
// version 2 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Library General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
//
#ifndef SGPlane_H
#define SGPlane_H
template<typename T>
class SGPlane {
public:
SGPlane()
{ }
SGPlane(const SGVec3<T>& normal, const T& dist) :
_normal(normal), _dist(dist)
{ }
SGPlane(const SGVec3<T>& normal, const SGVec3<T>& point) :
_normal(normal), _dist(-dot(normal, point))
{ }
SGPlane(const SGVec3<T> vertices[3]) :
_normal(normalize(cross(vertices[1] - vertices[0],
vertices[2] - vertices[0]))),
_dist(-dot(_normal, vertices[0]))
{ }
SGPlane(const SGVec3<T>& v0, const SGVec3<T>& v1, const SGVec3<T>& v2) :
_normal(normalize(cross(v1 - v0, v2 - v0))),
_dist(-dot(_normal, v0))
{ }
template<typename S>
explicit SGPlane(const SGPlane<S>& plane) :
_normal(plane.getNormal()), _dist(plane.getDist())
{ }
void setNormal(const SGVec3<T>& normal)
{ _normal = normal; }
const SGVec3<T>& getNormal() const
{ return _normal; }
void setDist(const T& dist)
{ _dist = dist; }
const T& getDist() const
{ return _dist; }
/// Return a point on the plane
SGVec3<T> getPointOnPlane() const
{ return -_dist*_normal; }
/// That is the distance where we measure positive in direction of the normal
T getPositiveDist() const
{ return -_dist; }
/// That is the distance where we measure positive in the oposite direction
/// of the normal.
const T& getNegativeDist() const
{ return _dist; }
private:
// That ordering is important because of one constructor
SGVec3<T> _normal;
T _dist;
};
#endif
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