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 - http://www.flightgear.org/~curt
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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
29 # error This library requires C++
34 #include <osg/ref_ptr>
37 #include <simgear/compiler.h>
38 #include <simgear/structure/subsystem_mgr.hxx>
39 #include <simgear/math/point3d.hxx>
40 #include <simgear/scene/model/placementtrans.hxx>
47 // Define a structure containing global scenery parameters
48 class FGScenery : public SGSubsystem {
49 // center of current scenery chunk
52 // FIXME this should be a views property
53 // angle of sun relative to current local horizontal
57 osg::ref_ptr<osg::Group> scene_graph;
58 osg::ref_ptr<osg::Group> terrain_branch;
59 osg::ref_ptr<osg::Group> gnd_lights_root;
60 osg::ref_ptr<osg::Group> vasi_lights_root;
61 osg::ref_ptr<osg::Group> rwy_lights_root;
62 osg::ref_ptr<osg::Group> taxi_lights_root;
63 osg::ref_ptr<osg::Group> models_branch;
64 osg::ref_ptr<osg::Group> aircraft_branch;
66 // list of all placement transform, used to move the scenery center on the fly.
67 typedef list<osg::ref_ptr<SGPlacementTransform> > placement_list_type;
68 placement_list_type _placement_list;
75 // Implementation of SGSubsystem.
79 void update (double dt);
81 /// Compute the elevation of the scenery at geodetic latitude lat,
82 /// geodetic longitude lon and not higher than max_alt.
83 /// If the exact flag is set to true, the scenery center is moved to
84 /// gain a higher accuracy of that query. The center is restored past
85 /// that to the original value.
86 /// The altitude hit is returned in the alt argument.
87 /// The method returns true if the scenery is available for the given
88 /// lat/lon pair. If there is no scenery for that point, the altitude
89 /// value is undefined.
90 /// All values are meant to be in meters or degrees.
91 bool get_elevation_m(double lat, double lon, double max_alt,
92 double& alt, const SGMaterial** material,
95 /// Compute the elevation of the scenery beow the cartesian point pos.
96 /// you the returned scenery altitude is not higher than the position
97 /// pos plus an ofset given with max_altoff.
98 /// If the exact flag is set to true, the scenery center is moved to
99 /// gain a higher accuracy of that query. The center is restored past
100 /// that to the original value.
101 /// The altitude hit is returned in the alt argument.
102 /// The method returns true if the scenery is available for the given
103 /// lat/lon pair. If there is no scenery for that point, the altitude
104 /// value is undefined.
105 /// All values are meant to be in meters.
106 bool get_cart_elevation_m(const SGVec3d& pos, double max_altoff,
107 double& radius, const SGMaterial** material,
110 /// Compute the nearest intersection point of the line starting from
111 /// start going in direction dir with the terrain.
112 /// The input and output values should be in cartesian coordinates in the
113 /// usual earth centered wgs84 coordiante system. Units are meters.
114 /// On success, true is returned.
115 bool get_cart_ground_intersection(const SGVec3d& start, const SGVec3d& dir,
116 SGVec3d& nearestHit, bool exact = false);
118 const SGVec3d& get_center() const { return center; }
119 void set_center( const SGVec3d& p );
121 osg::Group *get_scene_graph () const { return scene_graph.get(); }
122 inline void set_scene_graph (osg::Group * s) { scene_graph = s; }
124 osg::Group *get_terrain_branch () const { return terrain_branch.get(); }
125 inline void set_terrain_branch (osg::Group * t) { terrain_branch = t; }
127 inline osg::Group *get_gnd_lights_root () const {
128 return gnd_lights_root.get();
130 inline void set_gnd_lights_root (osg::Group *r) {
134 inline osg::Group *get_vasi_lights_root () const {
135 return vasi_lights_root.get();
137 inline void set_vasi_lights_root (osg::Group *r) {
138 vasi_lights_root = r;
141 inline osg::Group *get_rwy_lights_root () const {
142 return rwy_lights_root.get();
144 inline void set_rwy_lights_root (osg::Group *r) {
148 inline osg::Group *get_taxi_lights_root () const {
149 return taxi_lights_root.get();
151 inline void set_taxi_lights_root (osg::Group *r) {
152 taxi_lights_root = r;
155 inline osg::Group *get_models_branch () const {
156 return models_branch.get();
158 inline void set_models_branch (osg::Group *t) {
162 inline osg::Group *get_aircraft_branch () const {
163 return aircraft_branch.get();
165 inline void set_aircraft_branch (osg::Group *t) {
169 void register_placement_transform(SGPlacementTransform *trans);
170 void unregister_placement_transform(SGPlacementTransform *trans);
174 #endif // _SCENERY_HXX