164 lines
4.4 KiB
C++
164 lines
4.4 KiB
C++
// tileentry.hxx -- routines to handle an individual scenery tile
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//
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// Written by Curtis Olson, started May 1998.
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//
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// Copyright (C) 1998 - 2001 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 _TILEENTRY_HXX
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#define _TILEENTRY_HXX
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#ifndef __cplusplus
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# error This library requires C++
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#endif
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#include <simgear/compiler.h>
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#include <vector>
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#include <string>
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#include <simgear/bucket/newbucket.hxx>
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#include <simgear/misc/sg_path.hxx>
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#include <osg/ref_ptr>
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#include <osgDB/ReaderWriter>
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#include <osg/Group>
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#include <osg/LOD>
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#if defined( sgi )
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#include <strings.h>
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#endif
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namespace simgear {
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class ModelLoadHelper;
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/**
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* A class to encapsulate everything we need to know about a scenery tile.
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*/
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class TileEntry {
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public:
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// this tile's official location in the world
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SGBucket tile_bucket;
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std::string tileFileName;
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private:
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// pointer to ssg range selector for this tile
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osg::ref_ptr<osg::LOD> _node;
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// Reference to DatabaseRequest object set and used by the
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// osgDB::DatabasePager.
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osg::ref_ptr<osg::Referenced> _databaseRequest;
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static bool obj_load( const std::string& path,
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osg::Group* geometry,
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bool is_base,
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const osgDB::ReaderWriter::Options* options);
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/**
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* this value is used by the tile scheduler/loader to mark which
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* tiles are in the primary ring (i.e. the current tile or the
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* surrounding eight.) Other routines then can use this as an
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* optimization and not do some operation to tiles outside of this
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* inner ring. (For instance vasi color updating)
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*/
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bool is_inner_ring;
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bool is_cache_locked;
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double timestamp;
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static ModelLoadHelper *_modelLoader;
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public:
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// Constructor
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TileEntry( const SGBucket& b );
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// Destructor
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~TileEntry();
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static void setModelLoadHelper(ModelLoadHelper *m) { _modelLoader=m; }
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// Update the ssg transform node for this tile so it can be
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// properly drawn relative to our (0,0,0) point
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void prep_ssg_node(float vis);
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/**
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* Transition to OSG database pager
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*/
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static osg::Node* loadTileByFileName(const std::string& index_str,
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const osgDB::ReaderWriter::Options*);
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/**
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* Return true if the tile entry is loaded, otherwise return false
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* indicating that the loading thread is still working on this.
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*/
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inline bool is_loaded() const
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{
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return _node->getNumChildren() > 0;
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}
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/**
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* Return the "bucket" for this tile
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*/
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inline const SGBucket& get_tile_bucket() const { return tile_bucket; }
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/**
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* Add terrain mesh and ground lighting to scene graph.
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*/
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void addToSceneGraph( osg::Group *terrain_branch);
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/**
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* disconnect terrain mesh and ground lighting nodes from scene
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* graph for this tile.
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*/
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void removeFromSceneGraph();
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/**
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* return the scenegraph node for the terrain
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*/
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osg::LOD *getNode() const { return _node.get(); }
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double get_timestamp() const;
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void set_timestamp( double time_ms );
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inline bool get_inner_ring() const { return is_inner_ring; }
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inline void set_inner_ring( bool val ) { is_inner_ring = val; }
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inline void set_cache_lock( bool val ) { is_cache_locked = val; }
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inline bool get_cache_lock() const { return is_cache_locked; }
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// Get the ref_ptr to the DatabaseRequest object, in order to pass
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// this to the pager.
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osg::ref_ptr<osg::Referenced>& getDatabaseRequest()
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{
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return _databaseRequest;
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}
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};
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class ModelLoadHelper {
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public:
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virtual osg::Node *loadTileModel(const std::string& modelPath, bool cacheModel)=0;
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};
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}
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#endif // _TILEENTRY_HXX
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