1 // Copyright (C) 2006 Mathias Froehlich - Mathias.Froehlich@web.de
3 // This library is free software; you can redistribute it and/or
4 // modify it under the terms of the GNU Library General Public
5 // License as published by the Free Software Foundation; either
6 // version 2 of the License, or (at your option) any later version.
8 // This library is distributed in the hope that it will be useful,
9 // but WITHOUT ANY WARRANTY; without even the implied warranty of
10 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 // Library General Public License for more details.
13 // You should have received a copy of the GNU General Public License
14 // along with this program; if not, write to the Free Software
15 // Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
26 SGPlane(const SGVec3<T>& normal, const T& dist) :
27 _normal(normal), _dist(dist)
29 SGPlane(const SGVec3<T>& normal, const SGVec3<T>& point) :
30 _normal(normal), _dist(-dot(normal, point))
32 SGPlane(const SGVec3<T> vertices[3]) :
33 _normal(normalize(cross(vertices[1] - vertices[0],
34 vertices[2] - vertices[0]))),
35 _dist(-dot(_normal, vertices[0]))
37 SGPlane(const SGVec3<T>& v0, const SGVec3<T>& v1, const SGVec3<T>& v2) :
38 _normal(normalize(cross(v1 - v0, v2 - v0))),
39 _dist(-dot(_normal, v0))
42 explicit SGPlane(const SGPlane<S>& plane) :
43 _normal(plane.getNormal()), _dist(plane.getDist())
46 void setNormal(const SGVec3<T>& normal)
48 const SGVec3<T>& getNormal() const
51 void setDist(const T& dist)
53 const T& getDist() const
56 /// Return a point on the plane
57 SGVec3<T> getPointOnPlane() const
58 { return -_dist*_normal; }
60 /// That is the distance where we measure positive in direction of the normal
61 T getPositiveDist() const
63 /// That is the distance where we measure positive in the oposite direction
65 const T& getNegativeDist() const
69 // That ordering is important because of one constructor