97 lines
2.8 KiB
C++
97 lines
2.8 KiB
C++
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// Copyright (C) 2011 Curtis L Olson <curt@flightgear.org>
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//
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// This library is free software; you can redistribute it and/or
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// modify it under the terms of the GNU Library General Public
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// License as published by the Free Software Foundation; either
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// version 2 of the License, or (at your option) any later version.
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//
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Library General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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//
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#ifdef HAVE_CONFIG_H
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# include <simgear_config.h>
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#endif
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#include <simgear/math/project.hxx>
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#include <simgear/misc/PathOptions.hxx>
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#include <simgear/math/SGMath.hxx>
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#include <osg/Math>
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#include <osg/Matrixd>
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#include <osgDB/Registry>
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namespace simgear
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{
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GLint project(GLdouble objX, GLdouble objY, GLdouble objZ,
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const GLdouble *model, const GLdouble *proj, const GLint *view,
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GLdouble* winX, GLdouble* winY, GLdouble* winZ)
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{
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using namespace osg;
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Vec4d obj(objX, objY, objZ, 1.0);
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Matrixd Mmodel(model), Mproj(proj);
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Matrixd Mwin = (Matrixd::translate(1.0, 1.0, 1.0)
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* Matrixd::scale(0.5 * view[2], 0.5 * view[3], 0.5)
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* Matrixd::translate(view[0], view[1], 0.0));
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Vec4d result = obj * Mmodel * Mproj * Mwin;
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if (equivalent(result.w(), 0.0))
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return GL_FALSE;
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result = result / result.w();
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*winX = result.x(); *winY = result.y(); *winZ = result.z();
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return GL_TRUE;
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}
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osgDB::ReaderWriter::Options* makeOptionsFromPath(const SGPath& path)
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{
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using namespace osgDB;
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ReaderWriter::Options *options
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= new ReaderWriter::Options(*(Registry::instance()->getOptions()));
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options->setDatabasePath(path.str());
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return options;
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}
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}
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osg::Matrix SGGeod::makeSimulationFrameRelative() const
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{
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SGQuatd hlOr = SGQuatd::fromLonLat(*this);
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return osg::Matrix(toOsg(hlOr));
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}
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osg::Matrix SGGeod::makeSimulationFrame() const
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{
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osg::Matrix result(makeSimulationFrameRelative());
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SGVec3d coord;
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SGGeodesy::SGGeodToCart(*this, coord);
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result.setTrans(toOsg(coord));
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return result;
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}
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osg::Matrix SGGeod::makeZUpFrameRelative() const
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{
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osg::Matrix result(makeSimulationFrameRelative());
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// 180 degree rotation around Y axis
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osg::Quat flip(0.0, 1.0, 0.0, 0.0);
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result.preMult(osg::Matrix(flip));
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return result;
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}
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osg::Matrix SGGeod::makeZUpFrame() const
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{
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osg::Matrix result(makeZUpFrameRelative());
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SGVec3d coord;
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SGGeodesy::SGGeodToCart(*this, coord);
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result.setTrans(toOsg(coord));
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return result;
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}
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