119 lines
3.2 KiB
C++
119 lines
3.2 KiB
C++
// tilemgr.hxx -- routines to handle dynamic management of scenery tiles
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//
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// Written by Curtis Olson, started January 1998.
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//
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// Copyright (C) 1997 Curtis L. Olson - http://www.flightgear.org/~curt
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//
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// This program is free software; you can redistribute it and/or
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// modify it under the terms of the GNU General Public License as
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// published by the Free Software Foundation; either version 2 of the
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// License, or (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful, but
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// WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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//
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// $Id$
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#ifndef _TILEMGR_HXX
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#define _TILEMGR_HXX
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#include <simgear/compiler.h>
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#include <simgear/structure/subsystem_mgr.hxx>
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#include <simgear/bucket/newbucket.hxx>
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#include <simgear/scene/tgdb/TileEntry.hxx>
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#include <simgear/scene/tgdb/TileCache.hxx>
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class SGReaderWriterBTGOptions;
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namespace osg
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{
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class Node;
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}
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class FGTileMgr : public SGSubsystem, public simgear::ModelLoadHelper {
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private:
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// Tile loading state
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enum load_state {
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Start = 0,
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Inited = 1,
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Running = 2
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};
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load_state state;
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// schedule a tile for loading
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void sched_tile( const SGBucket& b, const bool is_inner_ring );
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// schedule a needed buckets for loading
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void schedule_needed(const SGBucket& curr_bucket, double rangeM);
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SGBucket previous_bucket;
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SGBucket current_bucket;
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SGBucket pending;
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osg::ref_ptr<SGReaderWriterBTGOptions> _options;
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// x and y distance of tiles to load/draw
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float vis;
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int xrange, yrange;
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// current longitude latitude
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double longitude;
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double latitude;
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/**
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* tile cache
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*/
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simgear::TileCache tile_cache;
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// Update the various queues maintained by the tilemagr (private
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// internal function, do not call directly.)
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void update_queues();
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// Prepare the ssg nodes corresponding to each tile. For each
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// tile, set the ssg transform and update it's range selector
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// based on current visibilty void prep_ssg_nodes( float
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// visibility_meters );
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void prep_ssg_nodes();
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SGPropertyNode* _visibilityMeters;
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public:
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FGTileMgr();
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~FGTileMgr();
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// Initialize the Tile Manager
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virtual void init();
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virtual void reinit();
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virtual void update(double dt);
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int schedule_tiles_at(const SGGeod& location, double rangeM);
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const SGBucket& get_current_bucket () const { return current_bucket; }
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/// Returns true if scenery is avaliable for the given lat, lon position
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/// within a range of range_m.
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/// lat and lon are expected to be in degrees.
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bool scenery_available(const SGGeod& position, double range_m);
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// Load a model for a tile
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osg::Node* loadTileModel(const string& modelPath, bool cacheModel);
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// Returns true if all the tiles in the tile cache have been loaded
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bool isSceneryLoaded();
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};
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#endif // _TILEMGR_HXX
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