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>
41 #include <simgear/scene/util/SGPickCallback.hxx>
48 // Define a structure containing global scenery parameters
49 class FGScenery : public SGSubsystem {
50 // center of current scenery chunk
53 // FIXME this should be a views property
54 // angle of sun relative to current local horizontal
58 osg::ref_ptr<osg::Group> scene_graph;
59 osg::ref_ptr<osg::Group> terrain_branch;
60 osg::ref_ptr<osg::Group> gnd_lights_root;
61 osg::ref_ptr<osg::Group> vasi_lights_root;
62 osg::ref_ptr<osg::Group> rwy_lights_root;
63 osg::ref_ptr<osg::Group> taxi_lights_root;
64 osg::ref_ptr<osg::Group> models_branch;
65 osg::ref_ptr<osg::Group> aircraft_branch;
67 // list of all placement transform, used to move the scenery center on the fly.
68 typedef list<osg::ref_ptr<SGPlacementTransform> > placement_list_type;
69 placement_list_type _placement_list;
76 // Implementation of SGSubsystem.
80 void update (double dt);
82 /// Compute the elevation of the scenery at geodetic latitude lat,
83 /// geodetic longitude lon and not higher than max_alt.
84 /// If the exact flag is set to true, the scenery center is moved to
85 /// gain a higher accuracy of that query. The center is restored past
86 /// that to the original value.
87 /// The altitude hit is returned in the alt argument.
88 /// The method returns true if the scenery is available for the given
89 /// lat/lon pair. If there is no scenery for that point, the altitude
90 /// value is undefined.
91 /// All values are meant to be in meters or degrees.
92 bool get_elevation_m(double lat, double lon, double max_alt,
93 double& alt, const SGMaterial** material,
96 /// Compute the elevation of the scenery beow the cartesian point pos.
97 /// you the returned scenery altitude is not higher than the position
98 /// pos plus an ofset given with max_altoff.
99 /// If the exact flag is set to true, the scenery center is moved to
100 /// gain a higher accuracy of that query. The center is restored past
101 /// that to the original value.
102 /// The altitude hit is returned in the alt argument.
103 /// The method returns true if the scenery is available for the given
104 /// lat/lon pair. If there is no scenery for that point, the altitude
105 /// value is undefined.
106 /// All values are meant to be in meters.
107 bool get_cart_elevation_m(const SGVec3d& pos, double max_altoff,
108 double& radius, const SGMaterial** material,
111 /// Compute the nearest intersection point of the line starting from
112 /// start going in direction dir with the terrain.
113 /// The input and output values should be in cartesian coordinates in the
114 /// usual earth centered wgs84 coordiante system. Units are meters.
115 /// On success, true is returned.
116 bool get_cart_ground_intersection(const SGVec3d& start, const SGVec3d& dir,
117 SGVec3d& nearestHit, bool exact = false);
118 void pick(const SGVec3d& pos, const SGVec3d& dir,
119 std::vector<SGSceneryPick>& pickList);
121 const SGVec3d& get_center() const { return center; }
122 void set_center( const SGVec3d& p );
124 osg::Group *get_scene_graph () const { return scene_graph.get(); }
125 inline void set_scene_graph (osg::Group * s) { scene_graph = s; }
127 osg::Group *get_terrain_branch () const { return terrain_branch.get(); }
128 inline void set_terrain_branch (osg::Group * t) { terrain_branch = t; }
130 inline osg::Group *get_gnd_lights_root () const {
131 return gnd_lights_root.get();
133 inline void set_gnd_lights_root (osg::Group *r) {
137 inline osg::Group *get_vasi_lights_root () const {
138 return vasi_lights_root.get();
140 inline void set_vasi_lights_root (osg::Group *r) {
141 vasi_lights_root = r;
144 inline osg::Group *get_rwy_lights_root () const {
145 return rwy_lights_root.get();
147 inline void set_rwy_lights_root (osg::Group *r) {
151 inline osg::Group *get_taxi_lights_root () const {
152 return taxi_lights_root.get();
154 inline void set_taxi_lights_root (osg::Group *r) {
155 taxi_lights_root = r;
158 inline osg::Group *get_models_branch () const {
159 return models_branch.get();
161 inline void set_models_branch (osg::Group *t) {
165 inline osg::Group *get_aircraft_branch () const {
166 return aircraft_branch.get();
168 inline void set_aircraft_branch (osg::Group *t) {
172 void register_placement_transform(SGPlacementTransform *trans);
173 void unregister_placement_transform(SGPlacementTransform *trans);
177 #endif // _SCENERY_HXX