//
// Written by Curtis Olson, started May 1998.
//
-// Copyright (C) 1998, 1999 Curtis L. Olson - curt@flightgear.org
+// 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
//
// 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.
//
// $Id$
#define _TILEENTRY_HXX
-#ifndef __cplusplus
+#ifndef __cplusplus
# error This library requires C++
-#endif
-
-#ifdef HAVE_CONFIG_H
-# include <config.h>
-#endif
-
-#ifdef HAVE_WINDOWS_H
-# include <windows.h>
#endif
-#include <GL/glut.h>
-#include <simgear/xgl/xgl.h>
-
#include <simgear/compiler.h>
#include <vector>
-#include STL_STRING
-
-#include <plib/ssg.h> // plib includes
+#include <string>
#include <simgear/bucket/newbucket.hxx>
-#include <simgear/math/point3d.hxx>
-
-#if defined( sgi )
-#include <strings.h>
-#endif
-
-FG_USING_STD(string);
-FG_USING_STD(vector);
-
+#include <simgear/misc/sg_path.hxx>
-typedef vector < Point3D > point_list;
-typedef point_list::iterator point_list_iterator;
-typedef point_list::const_iterator const_point_list_iterator;
+#include <osg/ref_ptr>
+#include <osgDB/ReaderWriter>
+#include <osg/Group>
+#include <osg/LOD>
-
-// Scenery tile class
-class FGTileEntry {
+/**
+ * A class to encapsulate everything we need to know about a scenery tile.
+ */
+class TileEntry {
public:
-
- typedef vector < sgVec3 * > free_vec3_list;
- typedef vector < sgVec2 * > free_vec2_list;
- typedef vector < unsigned short * > free_index_list;
-
- // node list
- point_list nodes;
- int ncount;
-
- // global tile culling data
- Point3D center;
- double bounding_radius;
- Point3D offset;
-
// this tile's official location in the world
SGBucket tile_bucket;
+ std::string tileFileName;
- // list of pointers to memory chunks that need to be freed when
- // tile entry goes away
- free_vec3_list vec3_ptrs;
- free_vec2_list vec2_ptrs;
- free_index_list index_ptrs;
-
- // ssg tree structure for this tile is as follows:
- // ssgRoot(scene)
- // - ssgBranch(terrain)
- // - ssgTransform(tile)
- // - ssgRangeSelector(tile)
- // - ssgEntity(tile)
- // - kid1(fan)
- // - kid2(fan)
- // ...
- // - kidn(fan)
-
- // pointer to ssg transform for this tile
- ssgTransform *terra_transform;
- ssgTransform *lights_transform;
+private:
// pointer to ssg range selector for this tile
- ssgRangeSelector *terra_range;
- ssgRangeSelector *lights_range;
-
- // we create several preset brightness and can choose which one we
- // want based on lighting conditions.
- ssgSelector *lights_brightness;
+ 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
- FGTileEntry();
+ TileEntry( const SGBucket& b );
+ TileEntry( const TileEntry& t );
// Destructor
- ~FGTileEntry();
+ ~TileEntry();
- // Clean up the memory used by this tile and delete the arrays
- // used by ssg as well as the whole ssg branch
- void free_tile();
-
- // Calculate this tile's offset
- void SetOffset( const Point3D& p)
+ // 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
{
- offset = center - p;
+ return _node->getNumChildren() > 0;
}
- // Return this tile's offset
- inline Point3D get_offset() const { return offset; }
-
- // 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( const Point3D& p, float vis);
+ /**
+ * 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();
+
+ /**
+ * Refresh a tile, reload the node from disk.
+ */
+ void refresh();
+
+ /**
+ * 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
projects / flightgear.git / blobdiff