cb087dc4de
Now the manager waits on terrasync, we never need to do the 'experimental' refresh feature, since we only load finished tiles.
145 lines
4.3 KiB
C++
145 lines
4.3 KiB
C++
// tileentry.hxx -- routines to handle an individual scenery tile
|
|
//
|
|
// Written by Curtis Olson, started May 1998.
|
|
//
|
|
// Copyright (C) 1998 - 2001 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
|
|
// published by the Free Software Foundation; either version 2 of the
|
|
// License, or (at your option) any later version.
|
|
//
|
|
// This program is distributed in the hope that it will be useful, but
|
|
// WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
// General Public License for more details.
|
|
//
|
|
// 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
|
|
//
|
|
// $Id$
|
|
|
|
|
|
#ifndef _TILEENTRY_HXX
|
|
#define _TILEENTRY_HXX
|
|
|
|
|
|
#ifndef __cplusplus
|
|
# error This library requires C++
|
|
#endif
|
|
|
|
#include <simgear/compiler.h>
|
|
|
|
#include <vector>
|
|
#include <string>
|
|
|
|
#include <simgear/bucket/newbucket.hxx>
|
|
#include <simgear/misc/sg_path.hxx>
|
|
|
|
#include <osg/ref_ptr>
|
|
#include <osgDB/ReaderWriter>
|
|
#include <osg/Group>
|
|
#include <osg/LOD>
|
|
|
|
/**
|
|
* A class to encapsulate everything we need to know about a scenery tile.
|
|
*/
|
|
class TileEntry {
|
|
|
|
public:
|
|
// this tile's official location in the world
|
|
SGBucket tile_bucket;
|
|
std::string tileFileName;
|
|
|
|
private:
|
|
|
|
// pointer to ssg range selector for this tile
|
|
osg::ref_ptr<osg::LOD> _node;
|
|
// Reference to DatabaseRequest object set and used by the
|
|
// osgDB::DatabasePager.
|
|
osg::ref_ptr<osg::Referenced> _databaseRequest;
|
|
|
|
/**
|
|
* This value is used by the tile scheduler/loader to load tiles
|
|
* in a useful sequence. The priority is set to reflect the tiles
|
|
* distance from the center, so all tiles are loaded in an innermost
|
|
* to outermost sequence.
|
|
*/
|
|
float _priority;
|
|
/** Flag indicating if tile belongs to current view. */
|
|
bool _current_view;
|
|
/** Time when tile expires. */
|
|
double _time_expired;
|
|
|
|
public:
|
|
|
|
// Constructor
|
|
TileEntry( const SGBucket& b );
|
|
TileEntry( const TileEntry& t );
|
|
|
|
// Destructor
|
|
~TileEntry();
|
|
|
|
// Update the ssg transform node for this tile so it can be
|
|
// properly drawn relative to our (0,0,0) point
|
|
void prep_ssg_node(float vis);
|
|
|
|
/**
|
|
* Transition to OSG database pager
|
|
*/
|
|
static osg::Node* loadTileByFileName(const std::string& index_str,
|
|
const osgDB::Options*);
|
|
/**
|
|
* Return true if the tile entry is loaded, otherwise return false
|
|
* indicating that the loading thread is still working on this.
|
|
*/
|
|
inline bool is_loaded() const
|
|
{
|
|
return _node->getNumChildren() > 0;
|
|
}
|
|
|
|
/**
|
|
* Return the "bucket" for this tile
|
|
*/
|
|
inline const SGBucket& get_tile_bucket() const { return tile_bucket; }
|
|
|
|
/**
|
|
* Add terrain mesh and ground lighting to scene graph.
|
|
*/
|
|
void addToSceneGraph( osg::Group *terrain_branch);
|
|
|
|
/**
|
|
* disconnect terrain mesh and ground lighting nodes from scene
|
|
* graph for this tile.
|
|
*/
|
|
void removeFromSceneGraph();
|
|
|
|
/**
|
|
* return the scenegraph node for the terrain
|
|
*/
|
|
osg::LOD *getNode() const { return _node.get(); }
|
|
|
|
inline double get_time_expired() const { return _time_expired; }
|
|
inline void update_time_expired( double time_expired ) { if (_time_expired<time_expired) _time_expired = time_expired; }
|
|
|
|
inline void set_priority(float priority) { _priority=priority; }
|
|
inline float get_priority() const { return _priority; }
|
|
inline void set_current_view(bool current_view) { _current_view = current_view; }
|
|
inline bool is_current_view() const { return _current_view; }
|
|
|
|
/**
|
|
* Return true if the tile entry is still needed, otherwise return false
|
|
* indicating that the tile is no longer in active use.
|
|
*/
|
|
inline bool is_expired(double current_time) const { return (_current_view) ? false : (current_time > _time_expired); }
|
|
|
|
// Get the ref_ptr to the DatabaseRequest object, in order to pass
|
|
// this to the pager.
|
|
osg::ref_ptr<osg::Referenced>& getDatabaseRequest()
|
|
{
|
|
return _databaseRequest;
|
|
}
|
|
};
|
|
|
|
#endif // _TILEENTRY_HXX
|