#include

#include "newcache.hxx" #include "scenery.hxx" #include "tilemgr.hxx" #define TEST_LAST_HIT_CACHE #ifdef ENABLE_THREADS SGLockedQueue FGTileMgr::attach_queue; SGLockedQueue FGTileMgr::model_queue; #else queue FGTileMgr::attach_queue; queue FGTileMgr::model_queue; #endif // ENABLE_THREADS queue FGTileMgr::delete_queue; // Constructor FGTileMgr::FGTileMgr(): state( Start ), current_tile( NULL ), vis( 16000 ), counter_hack(0) { } // Destructor FGTileMgr::~FGTileMgr() { } // Initialize the Tile Manager subsystem int FGTileMgr::init() { SG_LOG( SG_TERRAIN, SG_INFO, "Initializing Tile Manager subsystem." ); tile_cache.init(); #if 0 // instead it's just a lot easier to let any pending work flush // through, rather than trying to arrest the queue and nuke all // the various work at all the various stages and get everything // cleaned up properly. while ( ! attach_queue.empty() ) { attach_queue.pop(); } while ( ! model_queue.empty() ) { #ifdef ENABLE_THREADS FGDeferredModel* dm = model_queue.pop(); #else FGDeferredModel* dm = model_queue.front(); model_queue.pop(); #endif delete dm; } loader.reinit(); #endif hit_list.clear(); state = Inited; previous_bucket.make_bad(); current_bucket.make_bad(); longitude = latitude = -1000.0; return 1; } // schedule a tile for loading void FGTileMgr::sched_tile( const SGBucket& b ) { // see if tile already exists in the cache FGTileEntry *t = tile_cache.get_tile( b ); if ( t == NULL ) { // make space in the cache while ( (int)tile_cache.get_size() > tile_cache.get_max_cache_size() ) { long index = tile_cache.get_oldest_tile(); if ( index >= 0 ) { FGTileEntry *old = tile_cache.get_tile( index ); old->disconnect_ssg_nodes(); delete_queue.push( old ); tile_cache.clear_entry( index ); } else { // nothing to free ?!? forge ahead break; } } // create a new entry FGTileEntry *e = new FGTileEntry( b ); // insert the tile into the cache if ( tile_cache.insert_tile( e ) ) { // Schedule tile for loading loader.add( e ); } else { // insert failed (cache full with no available entries to // delete.) Try again later delete e; } } } // schedule a needed buckets for loading void FGTileMgr::schedule_needed( double vis, 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 << ")" ); SG_LOG( SG_TERRAIN, SG_ALERT, "This is a FATAL error. Exiting!" ); exit(-1); } 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; } // note * 2 at end doubles cache size (for fdm and viewer) 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; */ SGBucket b; // schedule center tile first so it can be loaded first b = sgBucketOffset( longitude, latitude, 0, 0 ); sched_tile( b ); 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 ); } } } // 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 ); } } } } void FGTileMgr::initialize_queue() { // First time through or we have teleported, initialize the // system and load all relavant tiles SG_LOG( SG_TERRAIN, SG_INFO, "Updating Tile list for " << current_bucket ); // cout << "tile cache size = " << tile_cache.get_size() << endl; // wipe/initialize tile cache // 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" double visibility_meters = fgGetDouble("/environment/visibility-m"); schedule_needed(visibility_meters, current_bucket); // do we really want to lose this? CLO #if 0 // Now force a load of the center tile and inner ring so we // have something to see in our first frame. int i; for ( i = 0; i < 9; ++i ) { if ( load_queue.size() ) { SG_LOG( SG_TERRAIN, SG_DEBUG, "Load queue not empty, loading a tile" ); SGBucket pending = load_queue.front(); load_queue.pop_front(); load_tile( pending ); } } #endif } /** * Update the various queues maintained by the tilemagr (private * internal function, do not call directly.) */ void FGTileMgr::update_queues() { // load the next model in the load queue. Currently this must // happen in the render thread because model loading can trigger // texture loading which involves use of the opengl api. if ( !model_queue.empty() ) { // cout << "loading next model ..." << endl; // load the next tile in the queue #ifdef ENABLE_THREADS FGDeferredModel* dm = model_queue.pop(); #else FGDeferredModel* dm = model_queue.front(); model_queue.pop(); #endif ssgTexturePath( (char *)(dm->get_texture_path().c_str()) ); try { ssgEntity *obj_model = globals->get_model_lib()->load_model( ".", dm->get_model_path(), globals->get_props(), globals->get_sim_time_sec() ); if ( obj_model != NULL ) { dm->get_obj_trans()->addKid( obj_model ); } } catch (const sg_exception& exc) { SG_LOG( SG_ALL, SG_ALERT, exc.getMessage() ); } dm->get_tile()->dec_pending_models(); delete dm; } // cout << "current elevation (ssg) == " << scenery.get_cur_elev() << endl; // activate loader thread one out of every 5 frames if ( counter_hack == 0 ) { // Notify the tile loader that it can load another tile loader.update(); } else { counter_hack = (counter_hack + 1) % 5; } if ( !attach_queue.empty() ) { #ifdef ENABLE_THREADS FGTileEntry* e = attach_queue.pop(); #else FGTileEntry* e = attach_queue.front(); attach_queue.pop(); #endif e->add_ssg_nodes( globals->get_scenery()->get_terrain_branch(), globals->get_scenery()->get_gnd_lights_root(), globals->get_scenery()->get_taxi_lights_root(), globals->get_scenery()->get_rwy_lights_root(), globals->get_scenery()->get_taxi_lights_root() ); // cout << "Adding ssg nodes for " } if ( !delete_queue.empty() ) { // cout << "delete queue = " << delete_queue.size() << endl; while ( delete_queue.size() > 30 ) { // uh oh, delete queue is blowing up, we aren't clearing // it fast enough. Let's just panic, well not panic, but // get real serious and agressively free up some tiles so // we don't explode our memory usage. SG_LOG( SG_TERRAIN, SG_ALERT, "Alert: catching up on tile delete queue" ); FGTileEntry* e = delete_queue.front(); while ( !e->free_tile() ); delete_queue.pop(); delete e; } FGTileEntry* e = delete_queue.front(); if ( e->free_tile() ) { delete_queue.pop(); delete e; } } } // 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 ) { SGLocation *location = globals->get_current_view()->getSGLocation(); sgdVec3 abs_pos_vector; sgdCopyVec3( abs_pos_vector, globals->get_current_view()->get_absolute_view_pos() ); return update( location, visibility_meters, abs_pos_vector ); } int FGTileMgr::update( SGLocation *location, double visibility_meters, sgdVec3 abs_pos_vector ) { longitude = location->getLongitude_deg(); latitude = location->getLatitude_deg(); // add 1.0m to the max altitude to give a little leeway to the // ground reaction code. altitude_m = location->getAltitudeASL_ft() * SG_FEET_TO_METER + 1.0; // if current altitude is apparently not initialized, set max // altitude to something big. if ( altitude_m < -1000 ) { altitude_m = 10000; } // SG_LOG( SG_TERRAIN, SG_DEBUG, "FGTileMgr::update() for " // << longitude << " " << latatitude ); current_bucket.set_bucket( longitude, latitude ); // SG_LOG( SG_TERRAIN, SG_DEBUG, "Updating tile list for " // << current_bucket ); fgSetInt( "/environment/current-tile-id", current_bucket.gen_index() ); // set global scenery center from current tile center current_tile = tile_cache.get_tile( current_bucket ); if ( current_tile != NULL ) { globals->get_scenery()->set_next_center( current_tile->center ); } else { SG_LOG( SG_TERRAIN, SG_WARN, "Tile not found (Ok if initializing)" ); globals->get_scenery()->set_next_center( Point3D(0.0) ); } // do tile load scheduling. // Note that we need keep track of both viewer buckets and fdm buckets. if ( state == Running ) { 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. 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; // load the next tile in the load queue (or authorize the next // load in the case of the threaded tile pager) loader.update(); } update_queues(); // save bucket... previous_bucket = current_bucket; updateCurrentElevAtPos( abs_pos_vector, altitude_m, location->get_tile_center() ); return 1; } // timer event driven call to scheduler for the purpose of refreshing the tile timestamps void FGTileMgr::refresh_view_timestamps() { SG_LOG( SG_TERRAIN, SG_INFO, "Refreshing timestamps for " << current_bucket.get_center_lon() << " " << current_bucket.get_center_lat() ); schedule_needed(fgGetDouble("/environment/visibility-m"), current_bucket); } int FGTileMgr::updateCurrentElevAtPos( sgdVec3 abs_pos_vector, double max_alt_m, Point3D center) { sgdVec3 sc; sgdSetVec3( sc, center[0], center[1], center[2]); // overridden with actual values if a terrain intersection is // found double hit_elev = -9999.0; double hit_radius = 0.0; sgdVec3 hit_normal = { 0.0, 0.0, 0.0 }; bool hit = false; if ( fabs(sc[0]) > 1.0 || fabs(sc[1]) > 1.0 || fabs(sc[2]) > 1.0 ) { // scenery center has been properly defined so any hit should // be valid (and not just luck) hit = fgCurrentElev(abs_pos_vector, max_alt_m, sc, // uncomment next paramater to fly under // bridges and a slightly faster algorithm // but you won't be able to land on aircraft carriers // current_tile->get_terra_transform(), &hit_list, &hit_elev, &hit_radius, hit_normal); } if ( hit ) { // cout << "elev = " << hit_elev << " " << hit_radius << endl; globals->get_scenery()->set_cur_elev( hit_elev ); globals->get_scenery()->set_cur_radius( hit_radius ); globals->get_scenery()->set_cur_normal( hit_normal ); } else { globals->get_scenery()->set_cur_elev( -9999.0 ); globals->get_scenery()->set_cur_radius( 0.0 ); globals->get_scenery()->set_cur_normal( hit_normal ); } return hit; } void FGTileMgr::prep_ssg_nodes( SGLocation *location, float vis ) { // traverse the potentially viewable tile list and update range // selector and transform Point3D center = location->get_tile_center(); float *up = location->get_world_up(); FGTileEntry *e; tile_cache.reset_traversal(); while ( ! tile_cache.at_end() ) { // cout << "processing a tile" << endl; if ( (e = tile_cache.get_current()) ) { e->prep_ssg_node( center, up, vis); } else { SG_LOG(SG_INPUT, SG_ALERT, "warning ... empty tile in cache"); } tile_cache.next(); } }