1 // scenery.hxx -- data structures and routines for managing scenery.
3 // Written by Curtis Olson, started May 1997.
5 // Copyright (C) 1997 Curtis L. Olson - curt@infoplane.com
7 // This program is free software; you can redistribute it and/or
8 // modify it under the terms of the GNU General Public License as
9 // published by the Free Software Foundation; either version 2 of the
10 // License, or (at your option) any later version.
12 // This program is distributed in the hope that it will be useful, but
13 // WITHOUT ANY WARRANTY; without even the implied warranty of
14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 // General Public License for more details.
17 // You should have received a copy of the GNU General Public License
18 // along with this program; if not, write to the Free Software
19 // Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
29 # error This library requires C++
34 #include <simgear/math/point3d.hxx>
36 #include <Main/fgfs.hxx>
39 // Define a structure containing global scenery parameters
40 class FGScenery : public FGSubsystem {
41 // center of current scenery chunk
44 // next center of current scenery chunk
47 // angle of sun relative to current local horizontal
50 // elevation of terrain at our current lat/lon (based on the
51 // actual drawn polygons)
54 // the distance (radius) from the center of the earth to the
55 // current scenery elevation point
58 // unit normal at point used to determine current elevation
66 // Implementation of FGSubsystem.
72 inline double get_cur_elev() const { return cur_elev; }
73 inline void set_cur_elev( double e ) { cur_elev = e; }
75 inline Point3D get_center() const { return center; }
76 inline void set_center( Point3D p ) { center = p; }
78 inline Point3D get_next_center() const { return next_center; }
79 inline void set_next_center( Point3D p ) { next_center = p; }
81 inline void set_cur_radius( double r ) { cur_radius = r; }
82 inline void set_cur_normal( sgdVec3 n ) { sgdCopyVec3( cur_normal, n ); }
86 extern FGScenery scenery;
89 // Initialize the Scenery Management system
90 int fgSceneryInit( void );
93 #endif // _SCENERY_HXX