#endif
#include <GL/glut.h>
-#include <simgear/xgl/xgl.h>
+
+#include <plib/ssg.h>
#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 <Aircraft/aircraft.hxx>
-#include <Main/options.hxx>
-#include <Main/views.hxx>
-#include <Objects/materialmgr.hxx>
+#include <Main/globals.hxx>
+#include <Main/fg_props.hxx>
+#include <Main/viewer.hxx>
#include <Objects/obj.hxx>
-#ifndef FG_OLD_WEATHER
-# include <WeatherCM/FGLocalWeatherDatabase.h>
-#else
-# include <Weather/weather.hxx>
-#endif
-
+#include "newcache.hxx"
#include "scenery.hxx"
-#include "tilecache.hxx"
#include "tilemgr.hxx"
#define TEST_LAST_HIT_CACHE
extern ssgRoot *scene;
-extern ssgBranch *terrain;
+extern ssgBranch *terrain_branch; // branch that holds world geometry
+extern ssgBranch *gnd_lights_branch; // branch that holds ground lighting
+extern ssgBranch *rwy_lights_branch; // branch that holds runway lighting
// the tile manager
FGTileMgr global_tile_mgr;
-// a temporary hack until we get everything rewritten with sgdVec3
-static inline Point3D operator + (const Point3D& a, const sgdVec3 b)
-{
- return Point3D(a.x()+b[0], a.y()+b[1], a.z()+b[2]);
-}
+#ifdef ENABLE_THREADS
+SGLockedQueue<FGTileEntry *> FGTileMgr::attach_queue;
+SGLockedQueue<FGDeferredModel *> FGTileMgr::model_queue;
+#else
+queue<FGTileEntry *> FGTileMgr::attach_queue;
+queue<FGDeferredModel *> FGTileMgr::model_queue;
+#endif // ENABLE_THREADS
// Constructor
-FGTileMgr::FGTileMgr ( void ):
- state( Start )
+FGTileMgr::FGTileMgr():
+ state( Start ),
+ current_tile( NULL ),
+ vis( 16000 ),
+ counter_hack(0)
{
}
// Destructor
-FGTileMgr::~FGTileMgr ( void ) {
+FGTileMgr::~FGTileMgr() {
}
// 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();
+ 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();
}
- global_tile_cache.init();
+ 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;
- // last_hit = 0;
-
- 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 ) {
- // 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
// schedule a tile for loading
-int FGTileMgr::sched_tile( const FGBucket& b ) {
+void FGTileMgr::sched_tile( const SGBucket& 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();
- } 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 );
- }
-
- 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 );
-}
+ FGTileEntry *t = tile_cache.get_tile( b );
+ if ( t == NULL ) {
+ // create a new entry
+ FGTileEntry *e = new FGTileEntry( b );
-// 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;
+ // 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;
}
}
-
- 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;
- }
}
-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;
+// schedule a needed buckets for loading
+void FGTileMgr::schedule_needed() {
+ // 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 latitude and" );
+ SG_LOG( SG_TERRAIN, SG_ALERT,
+ "longitude. This is a FATAL error. Exiting!" );
+ exit(-1);
+ }
- // walk dy units in the lat direction
- pending.set_bucket( longitude, clat );
+ SG_LOG( SG_TERRAIN, SG_INFO,
+ "scheduling needed tiles for " << longitude << " " << latitude );
- // 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;
+ vis = fgGetDouble("/environment/visibility-m");
- // walk dy units in the lat direction
- pending.set_bucket( last_longitude, clat );
+ double tile_width = current_bucket.get_width_m();
+ double tile_height = current_bucket.get_height_m();
+ // cout << "tile width = " << tile_width << " tile_height = "
+ // << tile_height !<< endl;
- // find the lon span for the new latitude
- span = bucket_span( clat );
+ xrange = (int)(vis / tile_width) + 1;
+ yrange = (int)(vis / tile_height) + 1;
+ if ( xrange < 1 ) { xrange = 1; }
+ if ( yrange < 1 ) { yrange = 1; }
+ // cout << "xrange = " << xrange << " yrange = " << yrange << endl;
- // 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 );
+ tile_cache.set_max_cache_size( (2*xrange + 2) * (2*yrange + 2) );
- FG_LOG( FG_TERRAIN, FG_DEBUG, " fgBucketOffset " << pending );
- return pending;
-}
+ SGBucket b;
+ // schedule center tile first so it can be loaded first
+ b = sgBucketOffset( longitude, latitude, 0, 0 );
+ sched_tile( b );
-// schedule a tile row(column) for loading
-void FGTileMgr::scroll( void )
-{
- FG_LOG( FG_TERRAIN, FG_DEBUG, "schedule_row: Scrolling" );
+ int x, y;
- 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 ) );
+ // 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 );
+ }
}
- 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 ) );
+ }
+
+ // 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 );
+ }
}
- break;
- default:
- FG_LOG( FG_TERRAIN, FG_WARN, "UNKNOWN SCROLL DIRECTION in schedule_row" );
- ;
}
- 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, "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 ) );
- }
-
- }
+ schedule_needed();
+ // 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() ) {
- FG_LOG( FG_TERRAIN, FG_DEBUG,
+ SG_LOG( SG_TERRAIN, SG_DEBUG,
"Load queue not empty, loading a tile" );
- FGLoadRec pending = load_queue.front();
+ SGBucket pending = load_queue.front();
load_queue.pop_front();
- load_tile( pending.b, pending.cache_index );
+ load_tile( pending );
}
}
+#endif
}
-// 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 lon, double lat ) {
+ // SG_LOG( SG_TERRAIN, SG_DEBUG, "FGTileMgr::update() for "
+ // << lon << " " << lat );
- // 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] <<
+ longitude = lon;
+ latitude = lat;
+ // SG_LOG( SG_TERRAIN, SG_DEBUG, "lon "<< lonlat[LON] <<
// " lat " << lonlat[LAT] );
current_bucket.set_bucket( longitude, latitude );
- // FG_LOG( FG_TERRAIN, FG_DEBUG, "Updating Tile list for " << current_bucket );
-
- tile_index = global_tile_cache.exists(current_bucket);
- // FG_LOG( FG_TERRAIN, FG_DEBUG, "tile index " << tile_index );
+ // SG_LOG( SG_TERRAIN, SG_DEBUG, "Updating Tile list for " << current_bucket );
- if ( tile_index >= 0 ) {
- current_tile = global_tile_cache.get_tile(tile_index);
- scenery.next_center = current_tile->center;
+ if ( tile_cache.exists( current_bucket ) ) {
+ current_tile = tile_cache.get_tile( current_bucket );
+ scenery.set_next_center( current_tile->center );
} else {
- FG_LOG( FG_TERRAIN, FG_WARN, "Tile not found" );
+ SG_LOG( SG_TERRAIN, SG_WARN, "Tile not found (Ok if initializing)" );
+ scenery.set_next_center( Point3D(0.0) );
}
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();
+ 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();
}
-
- } else if ( (state == Start) || (state == Inited) ) {
+ } else if ( state == Start || state == Inited ) {
+ SG_LOG( SG_TERRAIN, SG_INFO, "State == Start || 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 );
+ // load the next tile in the load queue (or authorize the next
+ // load in the case of the threaded tile pager)
+ loader.update();
}
- // 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;
+ // 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()) );
+ ssgEntity *obj_model
+ = ssgLoad( (char *)(dm->get_model_path().c_str()) );
+ if ( obj_model != NULL ) {
+ dm->get_obj_trans()->addKid( obj_model );
+ }
+ dm->get_tile()->dec_pending_models();
- // set scenery.cur_elev and scenery.cur_radius
+ delete dm;
+ }
- current_elev_ssg( current_view.abs_view_pos,
- current_view.view_pos );
- // cout << "current elevation (ssg) == " << scenery.cur_elev << endl;
+ // cout << "current elevation (ssg) == " << scenery.get_cur_elev() << endl;
previous_bucket = current_bucket;
last_longitude = longitude;
last_latitude = latitude;
+ // 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();
+
+ }
+ 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( terrain_branch,
+ gnd_lights_branch,
+ rwy_lights_branch );
+ // cout << "Adding ssg nodes for "
+ }
+
+ sgdVec3 sc;
+ sgdSetVec3( sc,
+ scenery.get_center()[0],
+ scenery.get_center()[1],
+ scenery.get_center()[2] );
+
+#if 0
+ if ( scenery.center == Point3D(0.0) ) {
+ // initializing
+ cout << "initializing scenery current elevation ... " << endl;
+ sgdVec3 tmp_abs_view_pos;
+
+ Point3D geod_pos = Point3D( longitude * SGD_DEGREES_TO_RADIANS,
+ latitude * SGD_DEGREES_TO_RADIANS,
+ 0.0);
+ Point3D tmp = sgGeodToCart( geod_pos );
+ scenery.center = tmp;
+ sgdSetVec3( tmp_abs_view_pos, tmp.x(), tmp.y(), tmp.z() );
+
+ // cout << "abs_view_pos = " << tmp_abs_view_pos << endl;
+ prep_ssg_nodes();
+
+ double tmp_elev;
+ if ( fgCurrentElev(tmp_abs_view_pos, sc, &hit_list,
+ &tmp_elev, &scenery.cur_radius, scenery.cur_normal) )
+ {
+ scenery.set_cur_elev( tmp_elev );
+ } else {
+ scenery.set_cur_elev( 0.0 );
+ }
+ cout << "result = " << scenery.get_cur_elev() << endl;
+ } else {
+#endif
+ /*
+ cout << "abs view pos = "
+ << globals->get_current_view()->get_abs_view_pos()[0] << ","
+ << globals->get_current_view()->get_abs_view_pos()[1] << ","
+ << globals->get_current_view()->get_abs_view_pos()[2]
+ << " view pos = "
+ << globals->get_current_view()->get_view_pos()[0] << ","
+ << globals->get_current_view()->get_view_pos()[1] << ","
+ << globals->get_current_view()->get_view_pos()[2]
+ << endl;
+ cout << "current_tile = " << current_tile << endl;
+ cout << "Scenery center = " << sc[0] << "," << sc[1] << "," << sc[2]
+ << endl;
+ */
+
+ // 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(globals->get_current_view()->get_abs_view_pos(),
+ sc,
+ &hit_list,
+ &hit_elev,
+ &hit_radius,
+ hit_normal);
+ }
+
+ if ( hit ) {
+ scenery.set_cur_elev( hit_elev );
+ scenery.set_cur_radius( hit_radius );
+ scenery.set_cur_normal( hit_normal );
+ } else {
+ scenery.set_cur_elev( -9999.0 );
+ scenery.set_cur_radius( 0.0 );
+ scenery.set_cur_normal( hit_normal );
+ }
+
+ // cout << "Current elevation = " << scenery.get_cur_elev() << endl;
+#if 0
+ }
+#endif
+
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 = 0.0;
+
+ vis = fgGetDouble("/environment/visibility-m");
// 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 );
+ FGTileEntry *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( scenery.get_center(), vis);
+ } else {
+ cout << "warning ... empty tile in cache" << endl;
}
- }
+ tile_cache.next();
+ }
}
projects / flightgear.git / blobdiff