Further restructuring of the scenery loading code.

[flightgear.git] / src / Scenery / tilemgr.hxx

diff --git a/src/Scenery/tilemgr.hxx b/src/Scenery/tilemgr.hxx
index 39616d0c74e5a9efd7c9bf553f8e6064a0efaedd..ff5fe42ba3eb1bf8038e1c15f3d1447f33350cfd 100644 (file)
--- a/src/Scenery/tilemgr.hxx
+++ b/src/Scenery/tilemgr.hxx
@@ -31,20 +31,18 @@
 
 #include <simgear/compiler.h>
 
-#include <list>
+#include <queue>
 
 #include <plib/ssg.h>
 
 #include <simgear/bucket/newbucket.hxx>
+#ifdef ENABLE_THREADS
+#  include <simgear/threads/SGQueue.hxx>
+#endif // ENABLE_THREADS
 
+#include "FGTileLoader.hxx"
 #include "hitlist.hxx"
-
-FG_USING_STD(list);
-
-
-#define FG_LOCAL_X_Y         81  // max(o->tile_diameter) ** 2
-
-#define FG_SQUARE( X ) ( (X) * (X) )
+#include "newcache.hxx"
 
 #if defined(USE_MEM) || defined(WIN32)
 #  define FG_MEM_COPY(to,from,n)        memcpy(to, from, n)
@@ -52,18 +50,12 @@ FG_USING_STD(list);
 #  define FG_MEM_COPY(to,from,n)        bcopy(from, to, n)
 #endif
 
+SG_USING_STD( queue );
+
 
 // forward declaration
 class FGTileEntry;
-
-
-class FGLoadRec {
-
-public:
-
-    FGBucket b;
-    int cache_index;
-};
+class FGDeferredModel;
 
 
 class FGTileMgr {
@@ -79,57 +71,29 @@ private:
 
     load_state state;
 
-    enum SCROLL_DIRECTION {
-       SCROLL_INIT = -1,
-       SCROLL_NONE = 0,
-       SCROLL_NORTH,
-       SCROLL_EAST,
-       SCROLL_SOUTH,
-       SCROLL_WEST,
-    };
-
-    SCROLL_DIRECTION scroll_direction;
-
-    // pending tile load queue
-    list < FGLoadRec > load_queue;
-
     // initialize the cache
     void initialize_queue();
 
-    // forced emptying of the queue.  This is necessay to keep
-    // bookeeping straight for the tile_cache -- which actually
-    // handles all the (de)allocations
-    void destroy_queue();
-
-    FGBucket BucketOffset( int dx, int dy );
-
     // schedule a tile for loading
-    int sched_tile( const FGBucket& b );
-
-    // load a tile
-    void load_tile( const FGBucket& b, int cache_index );
+    void sched_tile( const SGBucket& b );
 
-    // schedule a tile row(column) for loading
-    void scroll( void );
+    // schedule a needed buckets for loading
+    void schedule_needed();
 
     // see comment at prep_ssg_nodes()
     void prep_ssg_node( int idx );
        
-    // int hitcount;
-    // sgdVec3 hit_pts [ MAX_HITS ] ;
-
-    // ssgEntity *last_hit;
     FGHitList hit_list;
 
-    FGBucket previous_bucket;
-    FGBucket current_bucket;
-    FGBucket pending;
+    SGBucket previous_bucket;
+    SGBucket current_bucket;
+    SGBucket pending;
        
     FGTileEntry *current_tile;
        
-    // index of current tile in tile cache;
-    long int tile_index;
-    int tile_diameter;
+    // x and y distance of tiles to load/draw
+    float vis;
+    int xrange, yrange;
        
     // current longitude latitude
     double longitude;
@@ -137,16 +101,63 @@ private:
     double last_longitude;
     double last_latitude;
 
+    /**
+     * tile cache
+     */
+    FGNewCache tile_cache;
+
+    /**
+     * Queue tiles for loading.
+     */
+    FGTileLoader loader;
+    int counter_hack;
+
+    /**
+     * Work queues.
+     *
+     * attach_queue is the tiles that have been loaded [by the pager]
+     * that can be attached to the scene graph by the render thread.
+     *
+     * model_queue is the set of models that need to be loaded by the
+     * primary render thread.
+     */
+#ifdef ENABLE_THREADS
+    static SGLockedQueue<FGTileEntry *> attach_queue;
+    static SGLockedQueue<FGDeferredModel *> model_queue;
+#else
+    static queue<FGTileEntry *> attach_queue;
+    static queue<FGDeferredModel *> model_queue;
+#endif // ENABLE_THREADS
+
+public:
+
+    /**
+     * Add a loaded tile to the 'attach to the scene graph' queue.
+     */
+    static void ready_to_attach( FGTileEntry *t ) { attach_queue.push( t ); }
+
+#ifdef WISH_PLIB_WAS_THREADED // but it isn't
+    /**
+     * Tile is detatched from scene graph and is ready to delete
+     */
+    inline void ready_to_delete( FGTileEntry *t ) { loader.remove( t ); }
+#endif
+
+    /**
+     * Add a pending model to the 'deferred model load' queue
+     */
+    static void model_ready( FGDeferredModel *dm ) { model_queue.push( dm ); }
+
 public:
 
     // Constructor
-    FGTileMgr ( void );
+    FGTileMgr();
 
     // Destructor
-    ~FGTileMgr ( void );
+    ~FGTileMgr();
 
     // Initialize the Tile Manager subsystem
-    int init( void );
+    int init();
 
     // given the current lon/lat (in degrees), fill in the array of
     // local chunks.  If the chunk isn't already in the cache, then
@@ -164,13 +175,10 @@ public:
                     const sgdVec3 p, const sgdVec3 dir,
                     FGHitList *list );
 
-    bool current_elev_ssg( const Point3D& abs_view_pos, 
-                          const Point3D& view_pos );
-       
     // 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 );
+    void prep_ssg_nodes();
 };