1 // tilemgr.hxx -- routines to handle dynamic management of scenery tiles
3 // Written by Curtis Olson, started January 1998.
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.
27 #include <simgear/compiler.h>
29 #include <simgear/structure/subsystem_mgr.hxx>
30 #include <simgear/bucket/newbucket.hxx>
31 #include <simgear/scene/tgdb/TileEntry.hxx>
32 #include <simgear/scene/tgdb/TileCache.hxx>
42 class SGReaderWriterOptions;
45 class FGTileMgr : public SGSubsystem, public simgear::ModelLoadHelper {
58 // schedule a tile for loading, returns true when tile is already loaded
59 bool sched_tile( const SGBucket& b, double priority,bool current_view, double request_time);
61 // schedule a needed buckets for loading
62 void schedule_needed(const SGBucket& curr_bucket, double rangeM);
64 SGBucket previous_bucket;
65 SGBucket current_bucket;
67 osg::ref_ptr<simgear::SGReaderWriterOptions> _options;
69 // x and y distance of tiles to load/draw
73 // current longitude latitude
76 double scheduled_visibility;
81 simgear::TileCache tile_cache;
82 simgear::SGTerraSync* _terra_sync;
84 // Update the various queues maintained by the tilemagr (private
85 // internal function, do not call directly.)
88 static void refresh_tile(void* tileMgr, long tileIndex);
90 SGPropertyNode* _visibilityMeters;
91 SGPropertyNode_ptr _maxTileRangeM;
98 // Initialize the Tile Manager
100 virtual void reinit();
102 virtual void update(double dt);
104 int schedule_tiles_at(const SGGeod& location, double rangeM);
107 const SGBucket& get_current_bucket () const { return current_bucket; }
109 /// Returns true if scenery is available for the given lat, lon position
110 /// within a range of range_m.
111 /// lat and lon are expected to be in degrees.
112 bool schedule_scenery(const SGGeod& position, double range_m, double duration=0.0);
114 // Load a model for a tile
115 osg::Node* loadTileModel(const std::string& modelPath, bool cacheModel);
117 // Returns true if tiles around current view position have been loaded
118 bool isSceneryLoaded();
122 #endif // _TILEMGR_HXX