1 // Copyright (C) 2008 Tim Moore timoore@redhat.com
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.
20 osg::Matrix SGGeod::makeSimulationFrameRelative()
22 SGQuatd hlOr = SGQuatd::fromLonLat(*this);
23 return osg::Matrix(hlOr.osg());
26 osg::Matrix SGGeod::makeSimulationFrame()
28 osg::Matrix result(makeSimulationFrameRelative());
30 SGGeodesy::SGGeodToCart(*this, coord);
31 result.setTrans(coord.osg());
35 osg::Matrix SGGeod::makeZUpFrameRelative()
37 osg::Matrix result(makeSimulationFrameRelative());
38 // 180 degree rotation around Y axis
39 osg::Quat flip(0.0, 1.0, 0.0, 0.0);
40 result.preMult(osg::Matrix(flip));
44 osg::Matrix SGGeod::makeZUpFrame()
46 osg::Matrix result(makeZUpFrameRelative());
48 SGGeodesy::SGGeodToCart(*this, coord);
49 result.setTrans(coord.osg());