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.
18 #ifndef SGLineSegment_H
19 #define SGLineSegment_H
26 SGLineSegment(const SGVec3<T>& start, const SGVec3<T>& end) :
28 _direction(end - start)
31 explicit SGLineSegment(const SGLineSegment<S>& lineSegment) :
32 _start(lineSegment.getStart()),
33 _direction(lineSegment.getDirection())
36 void set(const SGVec3<T>& start, const SGVec3<T>& end)
37 { _start = start; _direction = end - start; }
39 const SGVec3<T>& getStart() const
41 SGVec3<T> getEnd() const
42 { return _start + _direction; }
43 const SGVec3<T>& getDirection() const
44 { return _direction; }
45 SGVec3<T> getNormalizedDirection() const
46 { return normalize(getDirection()); }
48 SGVec3<T> getCenter() const
49 { return _start + T(0.5)*_direction; }
51 SGLineSegment<T> transform(const SGMatrix<T>& matrix) const
53 SGLineSegment<T> lineSegment;
54 lineSegment._start = matrix.xformPt(_start);
55 lineSegment._direction = matrix.xformVec(_direction);
64 /// Output to an ostream
65 template<typename char_type, typename traits_type, typename T>
67 std::basic_ostream<char_type, traits_type>&
68 operator<<(std::basic_ostream<char_type, traits_type>& s,
69 const SGLineSegment<T>& lineSegment)
71 return s << "line segment: start = " << lineSegment.getStart()
72 << ", end = " << lineSegment.getEnd();