//
// Written by Curtis Olson, started January 1998.
//
-// Copyright (C) 1997 Curtis L. Olson - curt@infoplane.com
+// Copyright (C) 1997 Curtis L. Olson - http://www.flightgear.org/~curt
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License as
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
-// Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
//
// $Id$
#ifndef _TILEMGR_HXX
#define _TILEMGR_HXX
-
-#ifndef __cplusplus
-# error This library requires C++
-#endif
-
#include <simgear/compiler.h>
-#include <list>
-
-#include <plib/ssg.h>
-
#include <simgear/bucket/newbucket.hxx>
+#include <simgear/scene/tgdb/TileEntry.hxx>
+#include <simgear/scene/tgdb/TileCache.hxx>
+class SGReaderWriterBTGOptions;
-FG_USING_STD(list);
-
-
-#define FG_LOCAL_X_Y 81 // max(o->tile_diameter) ** 2
-
-#define FG_SQUARE( X ) ( (X) * (X) )
-
-#if defined(USE_MEM) || defined(WIN32)
-# define FG_MEM_COPY(to,from,n) memcpy(to, from, n)
-#else
-# define FG_MEM_COPY(to,from,n) bcopy(from, to, n)
-#endif
-
-
-class FGLoadRec {
-
-public:
-
- FGBucket b;
- int cache_index;
-};
-
-
-#define MAX_HITS 100
+namespace osg
+{
+class Node;
+}
-
-class FGTileMgr {
+class FGTileMgr : public simgear::ModelLoadHelper {
private:
load_state state;
- // pending tile load queue
- list < FGLoadRec > load_queue;
+ // initialize the cache
+ void initialize_queue();
// schedule a tile for loading
- int sched_tile( const FGBucket& b );
+ void sched_tile( const SGBucket& b, const bool is_inner_ring );
+
+ // schedule a needed buckets for loading
+ void schedule_needed(double visibility_meters, const SGBucket& curr_bucket);
- // load a tile
- void load_tile( const FGBucket& b, int cache_index );
+ SGBucket previous_bucket;
+ SGBucket current_bucket;
+ SGBucket pending;
+ osg::ref_ptr<SGReaderWriterBTGOptions> _options;
- int hitcount;
- sgdVec3 hit_pts [ MAX_HITS ] ;
+ // x and y distance of tiles to load/draw
+ float vis;
+ int xrange, yrange;
+
+ // current longitude latitude
+ double longitude;
+ double latitude;
+
+ /**
+ * tile cache
+ */
+ simgear::TileCache tile_cache;
public:
+ FGTileMgr();
- // Constructor
- FGTileMgr ( void );
-
- // Destructor
- ~FGTileMgr ( void );
-
- // Initialize the Tile Manager subsystem
- int init( void );
-
- // given the current lon/lat, fill in the array of local chunks.
- // If the chunk isn't already in the cache, then read it from
- // disk.
- int update( void );
-
- // Determine scenery altitude. Normally this just happens when we
- // render the scene, but we'd also like to be able to do this
- // explicitely. lat & lon are in radians. abs_view_pos in
- // meters. Returns result in meters.
- double current_elev( double lon, double lat, const Point3D& abs_view_pos );
- void my_ssg_los( string s, ssgBranch *branch, sgdMat4 m,
- const sgdVec3 p, const sgdVec3 dir );
- double current_elev_ssg( const Point3D& abs_view_pos,
- const Point3D& view_pos );
- double current_elev_new( const FGBucket& p );
-
- // Prepare the ssg nodes ... for each tile, set it's proper
- // transform and update it's range selector based on current
- // visibilty
- void prep_ssg_nodes( void );
-};
+ ~FGTileMgr();
+ // Initialize the Tile Manager
+ int init();
-// the tile manager
-extern FGTileMgr global_tile_mgr;
+ // Update the various queues maintained by the tilemagr (private
+ // internal function, do not call directly.)
+ void update_queues();
+ // given the current lon/lat (in degrees), fill in the array of
+ // local chunks. If the chunk isn't already in the cache, then
+ // read it from disk.
+ int update( double visibility_meters );
+ int update( const SGGeod& location, double visibility_meters);
-#endif // _TILEMGR_HXX
+ // Prepare the ssg nodes corresponding to each tile. For each
+ // tile, set the ssg transform and update it's range selector
+ // based on current visibilty void prep_ssg_nodes( float
+ // visibility_meters );
+ void prep_ssg_nodes(float visibility_meters );
+
+ const SGBucket& get_current_bucket () const { return current_bucket; }
+ /// Returns true if scenery is avaliable for the given lat, lon position
+ /// within a range of range_m.
+ /// lat and lon are expected to be in degrees.
+ bool scenery_available(const SGGeod& position, double range_m);
+ // Load a model for a tile
+ osg::Node* loadTileModel(const string& modelPath, bool cacheModel);
+
+ // Returns true if all the tiles in the tile cache have been loaded
+ bool isSceneryLoaded();
+};
+
+
+#endif // _TILEMGR_HXX
projects / flightgear.git / blobdiff