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 "SceneryPager.hxx"
32 #include "tileentry.hxx"
33 #include "tilecache.hxx"
43 class SGReaderWriterOptions;
46 class FGTileMgr : public SGSubsystem {
57 load_state state, last_state;
59 // schedule a tile for loading, returns true when tile is already loaded
60 bool sched_tile( const SGBucket& b, double priority,bool current_view, double request_time);
62 // schedule a needed buckets for loading
63 void schedule_needed(const SGBucket& curr_bucket, double rangeM);
65 SGBucket previous_bucket;
66 SGBucket current_bucket;
68 osg::ref_ptr<simgear::SGReaderWriterOptions> _options;
70 // current longitude latitude
73 double scheduled_visibility;
79 simgear::SGTerraSync* _terra_sync;
81 // Update the various queues maintained by the tilemagr (private
82 // internal function, do not call directly.)
85 static void refresh_tile(void* tileMgr, long tileIndex);
87 SGPropertyNode_ptr _visibilityMeters;
88 SGPropertyNode_ptr _maxTileRangeM, _disableNasalHooks;
90 osg::ref_ptr<flightgear::SceneryPager> _pager;
97 // Initialize the Tile Manager
99 virtual void reinit();
101 virtual void update(double dt);
103 int schedule_tiles_at(const SGGeod& location, double rangeM);
106 const SGBucket& get_current_bucket () const { return current_bucket; }
108 /// Returns true if scenery is available for the given lat, lon position
109 /// within a range of range_m.
110 /// lat and lon are expected to be in degrees.
111 bool schedule_scenery(const SGGeod& position, double range_m, double duration=0.0);
113 // Returns true if tiles around current view position have been loaded
114 bool isSceneryLoaded();
118 #endif // _TILEMGR_HXX