//
// Written by Curtis Olson, started January 1998.
//
-// Copyright (C) 1997 Curtis L. Olson - curt@infoplane.com
+// Copyright (C) 1997 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.
//
// $Id$
# include <config.h>
#endif
-#ifdef HAVE_WINDOWS_H
-# include <windows.h>
-#endif
+#include <algorithm>
+#include <functional>
-#include <GL/glut.h>
-#include <simgear/xgl/xgl.h>
+#include <osgViewer/Viewer>
#include <simgear/constants.h>
#include <simgear/debug/logstream.hxx>
-#include <simgear/math/fg_geodesy.hxx>
-#include <simgear/math/point3d.hxx>
#include <simgear/math/polar3d.hxx>
+#include <simgear/math/sg_geodesy.hxx>
#include <simgear/math/vector.hxx>
+#include <simgear/structure/exception.hxx>
+#include <simgear/scene/model/modellib.hxx>
+#include <simgear/scene/tgdb/SGReaderWriterBTGOptions.hxx>
-#include <Aircraft/aircraft.hxx>
-#include <Main/options.hxx>
-#include <Main/views.hxx>
-#include <Objects/materialmgr.hxx>
-#include <Objects/obj.hxx>
-
-#ifndef FG_OLD_WEATHER
-# include <WeatherCM/FGLocalWeatherDatabase.h>
-#else
-# include <Weather/weather.hxx>
-#endif
+#include <Main/globals.hxx>
+#include <Main/fg_props.hxx>
+#include <Main/renderer.hxx>
+#include <Main/viewer.hxx>
+#include <Scripting/NasalSys.hxx>
#include "scenery.hxx"
-#include "tilecache.hxx"
+#include "SceneryPager.hxx"
#include "tilemgr.hxx"
-#define TEST_LAST_HIT_CACHE
-
-extern ssgRoot *scene;
-extern ssgBranch *terrain;
-
-// the tile manager
-FGTileMgr global_tile_mgr;
-
+using std::for_each;
+using flightgear::SceneryPager;
+using simgear::SGModelLib;
+using simgear::TileEntry;
+using simgear::TileCache;
-// a temporary hack until we get everything rewritten with sgdVec3
-static inline Point3D operator + (const Point3D& a, const sgdVec3 b)
+FGTileMgr::FGTileMgr():
+ state( Start ),
+ vis( 16000 )
{
- return Point3D(a.x()+b[0], a.y()+b[1], a.z()+b[2]);
}
-// Constructor
-FGTileMgr::FGTileMgr ( void ):
- state( Start )
-{
-}
-
-
-// Destructor
-FGTileMgr::~FGTileMgr ( void ) {
+FGTileMgr::~FGTileMgr() {
+ // remove all nodes we might have left behind
+ osg::Group* group = globals->get_scenery()->get_terrain_branch();
+ group->removeChildren(0, group->getNumChildren());
}
// Initialize the Tile Manager subsystem
-int FGTileMgr::init( void ) {
- FG_LOG( FG_TERRAIN, FG_INFO, "Initializing Tile Manager subsystem." );
+int FGTileMgr::init() {
+ SG_LOG( SG_TERRAIN, SG_INFO, "Initializing Tile Manager subsystem." );
- // load default material library
- if ( ! material_mgr.loaded() ) {
- material_mgr.load_lib();
- }
+ _options = new SGReaderWriterBTGOptions;
+ _options->setMatlib(globals->get_matlib());
+ _options->setUseRandomObjects(fgGetBool("/sim/rendering/random-objects", true));
+ _options->setUseRandomVegetation(fgGetBool("/sim/rendering/random-vegetation", true));
+ osgDB::FilePathList &fp = _options->getDatabasePathList();
+ const string_list &sc = globals->get_fg_scenery();
+ fp.clear();
+ std::copy(sc.begin(), sc.end(), back_inserter(fp));
- global_tile_cache.init();
- hit_list.clear();
+ TileEntry::setModelLoadHelper(this);
- state = Inited;
+ tile_cache.init();
- // last_hit = 0;
+ state = Inited;
- tile_diameter = current_options.get_tile_diameter();
- FG_LOG( FG_TERRAIN, FG_INFO, "Tile Diameter = " << tile_diameter);
-
previous_bucket.make_bad();
current_bucket.make_bad();
- scroll_direction = SCROLL_INIT;
- tile_index = -9999;
-
longitude = latitude = -1000.0;
- last_longitude = last_latitude = -1000.0;
-
+
return 1;
}
-#if 0
// schedule a tile for loading
-static void disable_tile( int cache_index ) {
+void FGTileMgr::sched_tile( const SGBucket& b, const bool is_inner_ring ) {
// see if tile already exists in the cache
- // cout << "DISABLING CACHE ENTRY = " << cache_index << endl;
- FGTileEntry *t = global_tile_cache.get_tile( cache_index );
- t->ssg_disable();
-}
-#endif
+ TileEntry *t = tile_cache.get_tile( b );
+
+ if ( !t ) {
+ // make space in the cache
+ SceneryPager* pager = FGScenery::getPagerSingleton();
+ while ( (int)tile_cache.get_size() > tile_cache.get_max_cache_size() ) {
+ long index = tile_cache.get_oldest_tile();
+ if ( index >= 0 ) {
+ TileEntry *old = tile_cache.get_tile( index );
+ tile_cache.clear_entry( index );
+ osg::ref_ptr<osg::Object> subgraph = old->getNode();
+ old->removeFromSceneGraph();
+ delete old;
+ // zeros out subgraph ref_ptr, so subgraph is owned by
+ // the pager and will be deleted in the pager thread.
+ pager->queueDeleteRequest(subgraph);
+ } else {
+ // nothing to free ?!? forge ahead
+ break;
+ }
+ }
-// schedule a tile for loading
-int FGTileMgr::sched_tile( const FGBucket& b ) {
- // see if tile already exists in the cache
- int cache_index = global_tile_cache.exists( b );
-
- if ( cache_index >= 0 ) {
- // tile exists in cache, reenable it.
- // cout << "REENABLING DISABLED TILE" << endl;
- FGTileEntry *t = global_tile_cache.get_tile( cache_index );
- t->select_ptr->select( 1 );
- t->mark_loaded();
+ // create a new entry
+ TileEntry *e = new TileEntry( b );
+
+ // insert the tile into the cache
+ if ( tile_cache.insert_tile( e ) ) {
+ // update_queues will generate load request
+ } else {
+ // insert failed (cache full with no available entries to
+ // delete.) Try again later
+ delete e;
+ }
+ // Attach to scene graph
+ e->addToSceneGraph(globals->get_scenery()->get_terrain_branch());
} else {
- // find the next available cache entry and mark it as
- // scheduled
- cache_index = global_tile_cache.next_avail();
- FGTileEntry *t = global_tile_cache.get_tile( cache_index );
- t->mark_scheduled_for_use();
-
- // register a load request
- FGLoadRec request;
- request.b = b;
- request.cache_index = cache_index;
- load_queue.push_back( request );
+ t->set_inner_ring( is_inner_ring );
}
-
- return cache_index;
}
-// load a tile
-void FGTileMgr::load_tile( const FGBucket& b, int cache_index) {
-
- FG_LOG( FG_TERRAIN, FG_DEBUG, "Loading tile " << b );
-
- global_tile_cache.fill_in(cache_index, b);
-
- FG_LOG( FG_TERRAIN, FG_DEBUG, "Loaded for cache index: " << cache_index );
-}
-
-
-// Determine scenery altitude via ssg. Normally this just happens
-// when we render the scene, but we'd also like to be able to do this
-// explicitely. lat & lon are in radians. view_pos in current world
-// coordinate translated near (0,0,0) (in meters.) Returns result in
-// meters.
-
-bool
-FGTileMgr::current_elev_ssg( const Point3D& abs_view_pos,
- const Point3D& view_pos )
-{
- sgdVec3 orig, dir;
-
- sgdSetVec3(orig, view_pos.x(), view_pos.y(), view_pos.z() );
- sgdSetVec3(dir, abs_view_pos.x(), abs_view_pos.y(), abs_view_pos.z() );
-
- hit_list.Intersect( terrain, orig, dir );
-
- int this_hit=0;
- Point3D geoc;
- double result = -9999;
-
- int hitcount = hit_list.num_hits();
- for ( int i = 0; i < hitcount; ++i ) {
- geoc = fgCartToPolar3d( scenery.center + hit_list.get_point(i) );
- double lat_geod, alt, sea_level_r;
- fgGeocToGeod(geoc.lat(), geoc.radius(), &lat_geod,
- &alt, &sea_level_r);
- if ( alt > result && alt < 10000 ) {
- result = alt;
- this_hit = i;
- }
+// schedule a needed buckets for loading
+void FGTileMgr::schedule_needed( double vis, const SGBucket& curr_bucket) {
+ // sanity check (unfortunately needed!)
+ if ( longitude < -180.0 || longitude > 180.0
+ || latitude < -90.0 || latitude > 90.0 )
+ {
+ SG_LOG( SG_TERRAIN, SG_ALERT,
+ "Attempting to schedule tiles for bogus lon and lat = ("
+ << longitude << "," << latitude << ")" );
+ return; // FIXME
+ SG_LOG( SG_TERRAIN, SG_ALERT,
+ "This is a FATAL error. Exiting!" );
+ exit(-1);
}
- if ( result > -9000 ) {
- scenery.cur_elev = result;
- scenery.cur_radius = geoc.radius();
- sgdCopyVec3(scenery.cur_normal, hit_list.get_normal(this_hit));
- return true;
- } else {
- FG_LOG( FG_TERRAIN, FG_INFO, "no terrain intersection" );
- scenery.cur_elev = 0.0;
- float *up = current_view.local_up;
- sgdSetVec3(scenery.cur_normal, up[0], up[1], up[2]);
- return false;
+ SG_LOG( SG_TERRAIN, SG_INFO,
+ "scheduling needed tiles for " << longitude << " " << latitude );
+
+ // vis = fgGetDouble("/environment/visibility-m");
+
+ double tile_width = curr_bucket.get_width_m();
+ double tile_height = curr_bucket.get_height_m();
+ // cout << "tile width = " << tile_width << " tile_height = "
+ // << tile_height << endl;
+
+ xrange = (int)(vis / tile_width) + 1;
+ yrange = (int)(vis / tile_height) + 1;
+ if ( xrange < 1 ) { xrange = 1; }
+ if ( yrange < 1 ) { yrange = 1; }
+
+ // make the cache twice as large to avoid losing terrain when switching
+ // between aircraft and tower views
+ tile_cache.set_max_cache_size( (2*xrange + 2) * (2*yrange + 2) * 2 );
+ // cout << "xrange = " << xrange << " yrange = " << yrange << endl;
+ // cout << "max cache size = " << tile_cache.get_max_cache_size()
+ // << " current cache size = " << tile_cache.get_size() << endl;
+
+ // clear the inner ring flags so we can set them below. This
+ // prevents us from having "true" entries we aren't able to find
+ // to get rid of if we teleport a long ways away from the current
+ // location.
+ tile_cache.clear_inner_ring_flags();
+
+ SGBucket b;
+
+ // schedule center tile first so it can be loaded first
+ b = sgBucketOffset( longitude, latitude, 0, 0 );
+ sched_tile( b, true );
+
+ int x, y;
+
+ // schedule next ring of 8 tiles
+ for ( x = -1; x <= 1; ++x ) {
+ for ( y = -1; y <= 1; ++y ) {
+ if ( x != 0 || y != 0 ) {
+ b = sgBucketOffset( longitude, latitude, x, y );
+ sched_tile( b, true );
+ }
+ }
}
-}
-
-FGBucket FGTileMgr::BucketOffset( int dx, int dy )
-{
- double clat, clon, span;
- if( scroll_direction == SCROLL_INIT ) {
- pending.set_bucket( longitude, latitude );
- clat = pending.get_center_lat() + dy * FG_BUCKET_SPAN;
-
- // walk dy units in the lat direction
- pending.set_bucket( longitude, clat );
-
- // find the lon span for the new latitude
- span = bucket_span( clat );
-
- // walk dx units in the lon direction
- clon = longitude + dx * span;
- } else {
- pending.set_bucket( last_longitude, last_latitude );
- clat = pending.get_center_lat() + dy * FG_BUCKET_SPAN;
-
- // walk dy units in the lat direction
- pending.set_bucket( last_longitude, clat );
-
- // find the lon span for the new latitude
- span = bucket_span( clat );
-
- // walk dx units in the lon direction
- clon = last_longitude + dx * span;
- }
-
- while ( clon < -180.0 ) clon += 360.0;
- while ( clon >= 180.0 ) clon -= 360.0;
- pending.set_bucket( clon, clat );
-
- FG_LOG( FG_TERRAIN, FG_DEBUG, " fgBucketOffset " << pending );
- return pending;
-}
-
-
-// schedule a tile row(column) for loading
-void FGTileMgr::scroll( void )
-{
- FG_LOG( FG_TERRAIN, FG_DEBUG, "schedule_row: Scrolling" );
-
- int i, dw, dh;
-
- switch( scroll_direction ) {
- case SCROLL_NORTH:
- FG_LOG( FG_TERRAIN, FG_DEBUG,
- " (North) Loading " << tile_diameter << " tiles" );
- dw = tile_diameter / 2;
- dh = dw + 1;
- for ( i = 0; i < tile_diameter; i++ ) {
- sched_tile( BucketOffset( i - dw, dh) );
- }
- break;
- case SCROLL_EAST:
- FG_LOG( FG_TERRAIN, FG_DEBUG,
- " (East) Loading " << tile_diameter << " tiles" );
- dh = tile_diameter / 2;
- dw = dh + 1;
- for ( i = 0; i < tile_diameter; i++ ) {
- sched_tile( BucketOffset( dw, i - dh ) );
- }
- break;
- case SCROLL_SOUTH:
- dw = tile_diameter / 2;
- dh = -dw - 1;
- FG_LOG( FG_TERRAIN, FG_DEBUG,
- " (South) Loading " << tile_diameter << " tiles" );
- for ( i = 0; i < tile_diameter; i++ ) {
- sched_tile( BucketOffset( i - dw, dh) );
- }
- break;
- case SCROLL_WEST:
- dh = tile_diameter / 2;
- dw = -dh - 1;
- FG_LOG( FG_TERRAIN, FG_DEBUG,
- " (West) Loading " << tile_diameter << " tiles" );
- for ( i = 0; i < tile_diameter; i++ ) {
- sched_tile( BucketOffset( dw, i - dh ) );
- }
- break;
- default:
- FG_LOG( FG_TERRAIN, FG_WARN, "UNKNOWN SCROLL DIRECTION in schedule_row" );
- ;
+ // schedule remaining tiles
+ for ( x = -xrange; x <= xrange; ++x ) {
+ for ( y = -yrange; y <= yrange; ++y ) {
+ if ( x < -1 || x > 1 || y < -1 || y > 1 ) {
+ SGBucket b = sgBucketOffset( longitude, latitude, x, y );
+ sched_tile( b, false );
+ }
+ }
}
- FG_LOG( FG_TERRAIN, FG_DEBUG, "\tschedule_row returns" );
}
-void FGTileMgr::initialize_queue( void )
+void FGTileMgr::initialize_queue()
{
// First time through or we have teleported, initialize the
// system and load all relavant tiles
- FG_LOG( FG_TERRAIN, FG_INFO, "Updating Tile list for " << current_bucket );
- FG_LOG( FG_TERRAIN, FG_INFO, " First time through ... " );
- FG_LOG( FG_TERRAIN, FG_INFO, " Updating Tile list for " << current_bucket );
- FG_LOG( FG_TERRAIN, FG_INFO, " Loading "
- << tile_diameter * tile_diameter << " tiles" );
-
- int i;
- scroll_direction = SCROLL_INIT;
+ SG_LOG( SG_TERRAIN, SG_INFO, "Initialize_queue(): Updating Tile list for "
+ << current_bucket );
+ // cout << "tile cache size = " << tile_cache.get_size() << endl;
// wipe/initialize tile cache
- global_tile_cache.init();
+ // tile_cache.init();
previous_bucket.make_bad();
// build the local area list and schedule tiles for loading
// start with the center tile and work out in concentric
// "rings"
- sched_tile( current_bucket );
- Point3D geod_view_center( current_bucket.get_center_lon(),
- current_bucket.get_center_lat(),
- cur_fdm_state->get_Altitude()*FEET_TO_METER + 3 );
-
- current_view.abs_view_pos = fgGeodToCart( geod_view_center );
- current_view.view_pos = current_view.abs_view_pos - scenery.next_center;
-
- for ( i = 3; i <= tile_diameter; i = i + 2 ) {
- int j;
- int span = i / 2;
-
- // bottom row
- for ( j = -span; j <= span; ++j ) {
- sched_tile( BucketOffset( j, -span ) );
- }
-
- // top row
- for ( j = -span; j <= span; ++j ) {
- sched_tile( BucketOffset( j, span ) );
- }
-
- // middle rows
- for ( j = -span + 1; j <= span - 1; ++j ) {
- sched_tile( BucketOffset( -span, j ) );
- sched_tile( BucketOffset( span, j ) );
- }
+ double visibility_meters = fgGetDouble("/environment/visibility-m");
+ schedule_needed(visibility_meters, current_bucket);
+}
+osg::Node*
+FGTileMgr::loadTileModel(const string& modelPath, bool cacheModel)
+{
+ osg::Node* result = 0;
+ try {
+ if(cacheModel)
+ result =
+ SGModelLib::loadModel(modelPath, globals->get_props(),
+ new FGNasalModelData);
+
+ else
+ result=
+ SGModelLib::loadPagedModel(modelPath, globals->get_props(),
+ new FGNasalModelData);
+ } catch (const sg_io_exception& exc) {
+ string m(exc.getMessage());
+ m += " ";
+ m += exc.getLocation().asString();
+ SG_LOG( SG_ALL, SG_ALERT, m );
+ } catch (const sg_exception& exc) { // XXX may be redundant
+ SG_LOG( SG_ALL, SG_ALERT, exc.getMessage());
}
+ return result;
+}
- // Now force a load of the center tile and inner ring so we
- // have something to see in our first frame.
- for ( i = 0; i < 9; ++i ) {
- if ( load_queue.size() ) {
- FG_LOG( FG_TERRAIN, FG_DEBUG,
- "Load queue not empty, loading a tile" );
-
- FGLoadRec pending = load_queue.front();
- load_queue.pop_front();
- load_tile( pending.b, pending.cache_index );
+// Helper class for STL fun
+class TileLoad : public std::unary_function<TileCache::tile_map::value_type,
+ void>
+{
+public:
+ TileLoad(SceneryPager *pager, osg::FrameStamp* framestamp,
+ osg::Group* terrainBranch, osgDB::ReaderWriter::Options* options) :
+ _pager(pager), _framestamp(framestamp), _options(options) {}
+
+ TileLoad(const TileLoad& rhs) :
+ _pager(rhs._pager), _framestamp(rhs._framestamp),
+ _options(rhs._options) {}
+
+ void operator()(TileCache::tile_map::value_type& tilePair)
+ {
+ TileEntry* entry = tilePair.second;
+ if (entry->getNode()->getNumChildren() == 0) {
+ _pager->queueRequest(entry->tileFileName,
+ entry->getNode(),
+ entry->get_inner_ring() ? 10.0f : 1.0f,
+ _framestamp,
+#ifdef FGOSGPAGER25
+ entry->getDatabaseRequest(),
+#endif
+ _options);
}
}
+private:
+ SceneryPager* _pager;
+ osg::FrameStamp* _framestamp;
+ osgDB::ReaderWriter::Options* _options;
+};
+
+/**
+ * Update the various queues maintained by the tilemagr (private
+ * internal function, do not call directly.)
+ */
+void FGTileMgr::update_queues()
+{
+ SceneryPager* pager = FGScenery::getPagerSingleton();
+ osg::FrameStamp* framestamp
+ = globals->get_renderer()->getViewer()->getFrameStamp();
+ tile_cache.set_current_time(framestamp->getReferenceTime());
+ for_each(tile_cache.begin(), tile_cache.end(),
+ TileLoad(pager,
+ framestamp,
+ globals->get_scenery()->get_terrain_branch(), _options.get()));
}
-// given the current lon/lat, fill in the array of local chunks. If
-// the chunk isn't already in the cache, then read it from disk.
-int FGTileMgr::update( void ) {
- // FG_LOG( FG_TERRAIN, FG_DEBUG, "FGTileMgr::update()" );
-
- FGInterface *f = current_aircraft.fdm_state;
+// given the current lon/lat (in degrees), fill in the array of local
+// chunks. If the chunk isn't already in the cache, then read it from
+// disk.
+int FGTileMgr::update( double visibility_meters )
+{
+ SGVec3d viewPos = globals->get_current_view()->get_view_pos();
+ return update(SGGeod::fromCart(viewPos), visibility_meters);
+}
- // lonlat for this update
- longitude = f->get_Longitude() * RAD_TO_DEG;
- latitude = f->get_Latitude() * RAD_TO_DEG;
- // FG_LOG( FG_TERRAIN, FG_DEBUG, "lon "<< lonlat[LON] <<
- // " lat " << lonlat[LAT] );
+int FGTileMgr::update( const SGGeod& location, double visibility_meters)
+{
+ SG_LOG( SG_TERRAIN, SG_DEBUG, "FGTileMgr::update()" );
- current_bucket.set_bucket( longitude, latitude );
- // FG_LOG( FG_TERRAIN, FG_DEBUG, "Updating Tile list for " << current_bucket );
+ longitude = location.getLongitudeDeg();
+ latitude = location.getLatitudeDeg();
- tile_index = global_tile_cache.exists(current_bucket);
- // FG_LOG( FG_TERRAIN, FG_DEBUG, "tile index " << tile_index );
+ // SG_LOG( SG_TERRAIN, SG_DEBUG, "FGTileMgr::update() for "
+ // << longitude << " " << latatitude );
- if ( tile_index >= 0 ) {
- current_tile = global_tile_cache.get_tile(tile_index);
- scenery.next_center = current_tile->center;
- } else {
- FG_LOG( FG_TERRAIN, FG_WARN, "Tile not found" );
- }
+ current_bucket.set_bucket( location );
+ // SG_LOG( SG_TERRAIN, SG_DEBUG, "Updating tile list for "
+ // << current_bucket );
+ fgSetInt( "/environment/current-tile-id", current_bucket.gen_index() );
+ // do tile load scheduling.
+ // Note that we need keep track of both viewer buckets and fdm buckets.
if ( state == Running ) {
- if( current_bucket == previous_bucket) {
- FG_LOG( FG_TERRAIN, FG_DEBUG, "Same bucket as last time" );
- scroll_direction = SCROLL_NONE;
- } else {
- // We've moved to a new bucket, we need to scroll our
- // structures, and load in the new tiles
- // CURRENTLY THIS ASSUMES WE CAN ONLY MOVE TO ADJACENT TILES.
- // AT ULTRA HIGH SPEEDS THIS ASSUMPTION MAY NOT BE VALID IF
- // THE AIRCRAFT CAN SKIP A TILE IN A SINGLE ITERATION.
-
- if ( (current_bucket.get_lon() > previous_bucket.get_lon()) ||
- ( (current_bucket.get_lon() == previous_bucket.get_lon()) &&
- (current_bucket.get_x() > previous_bucket.get_x()) ) )
- {
- scroll_direction = SCROLL_EAST;
- }
- else if ( (current_bucket.get_lon() < previous_bucket.get_lon()) ||
- ( (current_bucket.get_lon() == previous_bucket.get_lon()) &&
- (current_bucket.get_x() < previous_bucket.get_x()) ) )
- {
- scroll_direction = SCROLL_WEST;
- }
-
- if ( (current_bucket.get_lat() > previous_bucket.get_lat()) ||
- ( (current_bucket.get_lat() == previous_bucket.get_lat()) &&
- (current_bucket.get_y() > previous_bucket.get_y()) ) )
- {
- scroll_direction = SCROLL_NORTH;
- }
- else if ( (current_bucket.get_lat() < previous_bucket.get_lat()) ||
- ( (current_bucket.get_lat() == previous_bucket.get_lat()) &&
- (current_bucket.get_y() < previous_bucket.get_y()) ) )
- {
- scroll_direction = SCROLL_SOUTH;
- }
-
- scroll();
- }
-
- } else if ( (state == Start) || (state == Inited) ) {
- initialize_queue();
- state = Running;
- }
-
- if ( load_queue.size() ) {
- FG_LOG( FG_TERRAIN, FG_DEBUG, "Load queue not empty, loading a tile" );
-
- FGLoadRec pending = load_queue.front();
- load_queue.pop_front();
- load_tile( pending.b, pending.cache_index );
+ SG_LOG( SG_TERRAIN, SG_DEBUG, "State == Running" );
+ if (current_bucket != previous_bucket) {
+ // We've moved to a new bucket, we need to schedule any
+ // needed tiles for loading.
+ SG_LOG( SG_TERRAIN, SG_INFO, "FGTileMgr::update()" );
+ schedule_needed(visibility_meters, current_bucket);
+ }
+ } else if ( state == Start || state == Inited ) {
+ SG_LOG( SG_TERRAIN, SG_INFO, "State == Start || Inited" );
+// initialize_queue();
+ state = Running;
+ if (current_bucket != previous_bucket
+ && current_bucket.get_chunk_lon() != -1000) {
+ SG_LOG( SG_TERRAIN, SG_INFO, "FGTileMgr::update()" );
+ schedule_needed(visibility_meters, current_bucket);
+ }
}
- // find our current elevation (feed in the current bucket to save work)
- // Point3D geod_pos = Point3D( f->get_Longitude(), f->get_Latitude(), 0.0);
- // Point3D tmp_abs_view_pos = fgGeodToCart(geod_pos);
-
- // cout << "current elevation (old) == "
- // << current_elev( f->get_Longitude(), f->get_Latitude(),
- // tmp_abs_view_pos )
- // << endl;
-
- // set scenery.cur_elev and scenery.cur_radius
-
- current_elev_ssg( current_view.abs_view_pos,
- current_view.view_pos );
- // cout << "current elevation (ssg) == " << scenery.cur_elev << endl;
+ update_queues();
+ // save bucket...
previous_bucket = current_bucket;
- last_longitude = longitude;
- last_latitude = latitude;
return 1;
}
-// Prepare the ssg nodes ... for each tile, set it's proper
-// transform and update it's range selector based on current
-// visibilty
-void FGTileMgr::prep_ssg_node( int idx ) {
-}
-
-void FGTileMgr::prep_ssg_nodes( void ) {
- FGTileEntry *t;
- float ranges[2];
- ranges[0] = 0.0f;
+void FGTileMgr::prep_ssg_nodes(float vis) {
// traverse the potentially viewable tile list and update range
// selector and transform
- for ( int i = 0; i < (int)global_tile_cache.get_size(); i++ ) {
- t = global_tile_cache.get_tile( i );
-
- if ( t->is_loaded() ) {
- // set range selector (LOD trick) to be distance to center
- // of tile + bounding radius
-
-#ifndef FG_OLD_WEATHER
- ranges[1] = WeatherDatabase->getWeatherVisibility()
- + t->bounding_radius;
-#else
- ranges[1] = current_weather.get_visibility()+t->bounding_radius;
-#endif
- t->range_ptr->setRanges( ranges, 2 );
- // calculate tile offset
- t->SetOffset( scenery.center );
+ TileEntry *e;
+ tile_cache.reset_traversal();
- // calculate ssg transform
- sgCoord sgcoord;
- sgSetCoord( &sgcoord,
- t->offset.x(), t->offset.y(), t->offset.z(),
- 0.0, 0.0, 0.0 );
- t->transform_ptr->setTransform( &sgcoord );
+ while ( ! tile_cache.at_end() ) {
+ // cout << "processing a tile" << endl;
+ if ( (e = tile_cache.get_current()) ) {
+ e->prep_ssg_node(vis);
+ } else {
+ SG_LOG(SG_INPUT, SG_ALERT, "warning ... empty tile in cache");
}
+ tile_cache.next();
+ }
+}
+
+bool FGTileMgr::scenery_available(const SGGeod& position, double range_m)
+{
+ return scenery_available(position.getLatitudeDeg(),
+ position.getLongitudeDeg(), range_m);
+}
+
+bool FGTileMgr::scenery_available(double lat, double lon, double range_m)
+{
+ // sanity check (unfortunately needed!)
+ if ( lon <= -180.0 || lon >= 180.0 || lat <= -90.0 || lat >= 90.0 )
+ return false;
+
+ SGBucket bucket(lon, lat);
+ TileEntry *te = tile_cache.get_tile(bucket);
+ if (!te || !te->is_loaded())
+ return false;
+
+ // Traverse all tiles required to be there for the given visibility.
+ // This uses exactly the same algorithm like the tile scheduler.
+ double tile_width = bucket.get_width_m();
+ double tile_height = bucket.get_height_m();
+
+ int xrange = (int)fabs(range_m / tile_width) + 1;
+ int yrange = (int)fabs(range_m / tile_height) + 1;
+
+ for ( int x = -xrange; x <= xrange; ++x ) {
+ for ( int y = -yrange; y <= yrange; ++y ) {
+ // We have already checked for the center tile.
+ if ( x != 0 || y != 0 ) {
+ SGBucket b = sgBucketOffset( lon, lat, x, y );
+ TileEntry *te = tile_cache.get_tile(b);
+ if (!te || !te->is_loaded())
+ return false;
+ }
}
+ }
+
+ // Survived all tests.
+ return true;
+}
+
+namespace
+{
+struct IsTileLoaded :
+ public std::unary_function<TileCache::tile_map::value_type, bool>
+{
+ bool operator()(const TileCache::tile_map::value_type& tilePair) const
+ {
+ return tilePair.second->is_loaded();
+ }
+};
+}
+
+bool FGTileMgr::isSceneryLoaded()
+{
+ return (std::find_if(tile_cache.begin(), tile_cache.end(),
+ std::not1(IsTileLoaded()))
+ == tile_cache.end());
}