1 // dome.hxx -- model sky with an upside down "bowl"
3 // Written by Curtis Olson, started December 1997.
4 // SSG-ified by Curtis Olson, February 2000.
6 // Copyright (C) 1997-2000 Curtis L. Olson - http://www.flightgear.org/~curt
8 // This library is free software; you can redistribute it and/or
9 // modify it under the terms of the GNU Library General Public
10 // License as published by the Free Software Foundation; either
11 // version 2 of the License, or (at your option) any later version.
13 // This library is distributed in the hope that it will be useful,
14 // but WITHOUT ANY WARRANTY; without even the implied warranty of
15 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 // Library General Public License for more details.
18 // You should have received a copy of the GNU General Public License
19 // along with this program; if not, write to the Free Software
20 // Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
27 # error This library requires C++
30 #include <osg/ref_ptr>
32 #include <osg/MatrixTransform>
34 #include <simgear/structure/SGReferenced.hxx>
35 #include <simgear/math/SGMath.hxx>
39 class DrawElementsUShort;
42 class SGSkyDome : public SGReferenced {
43 osg::ref_ptr<osg::MatrixTransform> dome_transform;
46 osg::ref_ptr<osg::Vec3Array> dome_vl;
47 osg::ref_ptr<osg::Vec3Array> dome_cl;
56 // initialize the sky object and connect it into our scene graph
58 osg::Node *build( double hscale = 80000.0, double vscale = 80000.0 );
60 // repaint the sky colors based on current value of sun_angle,
61 // sky, and fog colors. This updates the color arrays for
63 // sun angle in degrees relative to verticle
64 // 0 degrees = high noon
65 // 90 degrees = sun rise/set
66 // 180 degrees = darkest midnight
67 bool repaint( const SGVec3f& sun_color, const SGVec3f& sky_color,
68 const SGVec3f& fog_color, double sun_angle, double vis );
70 // reposition the sky at the specified origin and orientation
71 // lon specifies a rotation about the Z axis
72 // lat specifies a rotation about the new Y axis
73 // spin specifies a rotation about the new Z axis (and orients the
74 // sunrise/set effects
75 bool reposition( const SGVec3f& p, double asl,
76 double lon, double lat, double spin );
78 void makeDome(int rings, int bands, osg::DrawElementsUShort& elements);
82 #endif // _SKYDOME_HXX