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++
36 #include <simgear/compiler.h>
37 #include <simgear/structure/subsystem_mgr.hxx>
38 #include <simgear/math/point3d.hxx>
39 #include <simgear/scene/model/placementtrans.hxx>
40 #include <simgear/structure/ssgSharedPtr.hxx>
49 // Define a structure containing global scenery parameters
50 class FGScenery : public SGSubsystem {
51 // center of current scenery chunk
54 // next center of current scenery chunk
57 // FIXME this should be a views property
58 // angle of sun relative to current local horizontal
62 ssgSharedPtr<ssgRoot> scene_graph;
63 ssgSharedPtr<ssgBranch> terrain_branch;
64 ssgSharedPtr<ssgRoot> gnd_lights_root;
65 ssgSharedPtr<ssgRoot> vasi_lights_root;
66 ssgSharedPtr<ssgRoot> rwy_lights_root;
67 ssgSharedPtr<ssgRoot> taxi_lights_root;
68 ssgSharedPtr<ssgBranch> models_branch;
69 ssgSharedPtr<ssgBranch> aircraft_branch;
71 // list of all placement transform, used to move the scenery center on the fly.
72 typedef list<ssgSharedPtr<ssgPlacementTransform> > placement_list_type;
73 placement_list_type _placement_list;
80 // Implementation of SGSubsystem.
84 void update (double dt);
86 /// Compute the elevation of the scenery at geodetic latitude lat,
87 /// geodetic longitude lon and not higher than max_alt.
88 /// If the exact flag is set to true, the scenery center is moved to
89 /// gain a higher accuracy of that query. The center is restored past
90 /// that to the original value.
91 /// The altitude hit is returned in the alt argument.
92 /// The method returns true if the scenery is available for the given
93 /// lat/lon pair. If there is no scenery for that point, the altitude
94 /// value is undefined.
95 /// All values are meant to be in meters or degrees.
96 bool get_elevation_m(double lat, double lon, double max_alt,
97 double& alt, const SGMaterial** material,
100 /// Compute the elevation of the scenery beow the cartesian point pos.
101 /// you the returned scenery altitude is not higher than the position
102 /// pos plus an ofset given with max_altoff.
103 /// If the exact flag is set to true, the scenery center is moved to
104 /// gain a higher accuracy of that query. The center is restored past
105 /// that to the original value.
106 /// The altitude hit is returned in the alt argument.
107 /// The method returns true if the scenery is available for the given
108 /// lat/lon pair. If there is no scenery for that point, the altitude
109 /// value is undefined.
110 /// All values are meant to be in meters.
111 bool get_cart_elevation_m(const sgdVec3& pos, double max_altoff,
112 double& radius, const SGMaterial** material,
115 /// Compute the nearest intersection point of the line starting from
116 /// start going in direction dir with the terrain.
117 /// The input and output values should be in cartesian coordinates in the
118 /// usual earth centered wgs84 coordiante system. Units are meters.
119 /// On success, true is returned.
120 bool get_cart_ground_intersection(const sgdVec3& start, const sgdVec3& dir,
121 sgdVec3& nearestHit, bool exact = false);
123 inline const Point3D& get_center() const { return center; }
124 void set_center( const Point3D& p );
126 inline const Point3D& get_next_center() const { return next_center; }
127 inline void set_next_center( const Point3D& p ) { next_center = p; }
129 inline ssgRoot *get_scene_graph () const { return scene_graph; }
130 inline void set_scene_graph (ssgRoot * s) { scene_graph = s; }
132 inline ssgBranch *get_terrain_branch () const { return terrain_branch; }
133 inline void set_terrain_branch (ssgBranch * t) { terrain_branch = t; }
135 inline ssgRoot *get_gnd_lights_root () const {
136 return gnd_lights_root;
138 inline void set_gnd_lights_root (ssgRoot *r) {
142 inline ssgRoot *get_vasi_lights_root () const {
143 return vasi_lights_root;
145 inline void set_vasi_lights_root (ssgRoot *r) {
146 vasi_lights_root = r;
149 inline ssgRoot *get_rwy_lights_root () const {
150 return rwy_lights_root;
152 inline void set_rwy_lights_root (ssgRoot *r) {
156 inline ssgRoot *get_taxi_lights_root () const {
157 return taxi_lights_root;
159 inline void set_taxi_lights_root (ssgRoot *r) {
160 taxi_lights_root = r;
163 inline ssgBranch *get_models_branch () const {
164 return models_branch;
166 inline void set_models_branch (ssgBranch *t) {
170 inline ssgBranch *get_aircraft_branch () const {
171 return aircraft_branch;
173 inline void set_aircraft_branch (ssgBranch *t) {
177 void register_placement_transform(ssgPlacementTransform *trans);
178 void unregister_placement_transform(ssgPlacementTransform *trans);
182 #endif // _SCENERY_HXX