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.
29 # error This library requires C++
32 #include <simgear/compiler.h>
33 #include <simgear/math/point3d.hxx>
34 #include <simgear/scene/model/location.hxx>
36 #include <simgear/bucket/newbucket.hxx>
37 #include "newcache.hxx"
39 #if defined(USE_MEM) || defined(WIN32)
40 # define FG_MEM_COPY(to,from,n) memcpy(to, from, n)
42 # define FG_MEM_COPY(to,from,n) bcopy(from, to, n)
45 // forward declaration
63 // initialize the cache
64 void initialize_queue();
66 // schedule a tile for loading
67 void sched_tile( const SGBucket& b, const bool is_inner_ring );
69 // schedule a needed buckets for loading
70 void schedule_needed(double visibility_meters, const SGBucket& curr_bucket);
72 SGBucket previous_bucket;
73 SGBucket current_bucket;
76 FGTileEntry *current_tile;
78 // x and y distance of tiles to load/draw
82 // current longitude latitude
90 FGNewCache tile_cache;
100 // Initialize the Tile Manager subsystem
103 // Update the various queues maintained by the tilemagr (private
104 // internal function, do not call directly.)
105 void update_queues();
107 // given the current lon/lat (in degrees), fill in the array of
108 // local chunks. If the chunk isn't already in the cache, then
109 // read it from disk.
110 int update( double visibility_meters );
111 int update( SGLocation *location, double visibility_meters);
113 // Prepare the ssg nodes corresponding to each tile. For each
114 // tile, set the ssg transform and update it's range selector
115 // based on current visibilty void prep_ssg_nodes( float
116 // visibility_meters );
117 void prep_ssg_nodes(float visibility_meters );
119 const SGBucket& get_current_bucket () const { return current_bucket; }
121 /// Returns true if scenery is avaliable for the given lat, lon position
122 /// within a range of range_m.
123 /// lat and lon are expected to be in degrees.
124 bool scenery_available(double lat, double lon, double range_m);
126 // Load a model for a tile
127 static osg::Node* loadTileModel(const string& modelPath, bool cacheModel);
129 // Returns true if all the tiles in the tile cache have been loaded
130 bool isSceneryLoaded();
134 #endif // _TILEMGR_HXX