]> git.mxchange.org Git - flightgear.git/blobdiff - src/Scenery/tileentry.cxx
A long, long time ago, a bug was inadvertently introduced into the threaded
[flightgear.git] / src / Scenery / tileentry.cxx
index 231d55269fd36e05ce7215ea0a541aac2a10f977..a457c76c35b584416dd1c409754467be755502b0 100644 (file)
@@ -2,7 +2,7 @@
 //
 // Written by Curtis Olson, started May 1998.
 //
-// Copyright (C) 1998 - 2001  Curtis L. Olson  - curt@flightgear.org
+// Copyright (C) 1998 - 2001  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
@@ -26,7 +26,7 @@
 #endif
 
 #include <simgear/compiler.h>
-
+#include <plib/ul.h>
 #include <Main/main.hxx>
 
 
@@ -34,6 +34,7 @@
 
 #include <simgear/bucket/newbucket.hxx>
 #include <simgear/debug/logstream.hxx>
+#include <simgear/math/polar3d.hxx>
 #include <simgear/math/sg_geodesy.hxx>
 #include <simgear/math/sg_random.h>
 #include <simgear/misc/sgstream.hxx>
@@ -41,6 +42,8 @@
 #include <simgear/scene/material/matlib.hxx>
 #include <simgear/scene/tgdb/apt_signs.hxx>
 #include <simgear/scene/tgdb/obj.hxx>
+#include <simgear/scene/tgdb/vasi.hxx>
+#include <simgear/scene/model/placementtrans.hxx>
 
 #include <Aircraft/aircraft.hxx>
 #include <Include/general.hxx>
@@ -60,16 +63,17 @@ SG_USING_STD(string);
 FGTileEntry::FGTileEntry ( const SGBucket& b )
     : center( Point3D( 0.0 ) ),
       tile_bucket( b ),
-      terra_transform( new ssgTransform ),
-      vasi_lights_transform( new ssgTransform ),
-      rwy_lights_transform( new ssgTransform ),
-      taxi_lights_transform( new ssgTransform ),
+      terra_transform( new ssgPlacementTransform ),
+      vasi_lights_transform( new ssgPlacementTransform ),
+      rwy_lights_transform( new ssgPlacementTransform ),
+      taxi_lights_transform( new ssgPlacementTransform ),
       terra_range( new ssgRangeSelector ),
       vasi_lights_selector( new ssgSelector ),
       rwy_lights_selector( new ssgSelector ),
       taxi_lights_selector( new ssgSelector ),
       loaded(false),
       pending_models(0),
+      is_inner_ring(false),
       free_tracker(0)
 {
     // update the contents
@@ -313,8 +317,6 @@ bool FGTileEntry::free_tile() {
 void FGTileEntry::prep_ssg_node( const Point3D& p, sgVec3 up, float vis) {
     if ( !loaded ) return;
 
-    SetOffset( p );
-
     // visibility can change from frame to frame so we update the
     // range selector cutoff's each time.
     terra_range->setRange( 0, SG_ZERO );
@@ -325,9 +327,8 @@ void FGTileEntry::prep_ssg_node( const Point3D& p, sgVec3 up, float vis) {
         gnd_lights_range->setRange( 1, vis * 1.5 + bounding_radius );
     }
 
-    sgVec3 sgTrans;
-    sgSetVec3( sgTrans, offset.x(), offset.y(), offset.z() );
-    terra_transform->setTransform( sgTrans );
+    sgdVec3 sgdTrans;
+    sgdSetVec3( sgdTrans, center.x(), center.y(), center.z() );
 
     FGLight *l = (FGLight *)(globals->get_subsystem("lighting"));
     if ( gnd_lights_transform ) {
@@ -342,15 +343,11 @@ void FGTileEntry::prep_ssg_node( const Point3D& p, sgVec3 up, float vis) {
         sgCopyVec3( lift_vec, up );
 
         double agl;
-        agl = globals->get_current_view()->getAltitudeASL_ft()
-            * SG_FEET_TO_METER - globals->get_scenery()->get_cur_elev();
+        agl = globals->get_current_view()->getAltitudeASL_ft()*SG_FEET_TO_METER
+          - globals->get_current_view()->getSGLocation()->get_cur_elev_m();
 
-        // sgTrans just happens to be the
-        // vector from scenery center to the center of this tile which
-        // is what we want to calculate the distance of
-        sgVec3 to;
-        sgCopyVec3( to, sgTrans );
-        double dist = sgLengthVec3( to );
+        // Compute the distance of the scenery center from the view position.
+        double dist = center.distance3D(p);
 
         if ( general.get_glDepthBits() > 16 ) {
             sgScaleVec3( lift_vec, 10.0 + agl / 100.0 + dist / 10000 );
@@ -358,11 +355,12 @@ void FGTileEntry::prep_ssg_node( const Point3D& p, sgVec3 up, float vis) {
             sgScaleVec3( lift_vec, 10.0 + agl / 20.0 + dist / 5000 );
         }
 
-        sgVec3 lt_trans;
-        sgCopyVec3( lt_trans, sgTrans );
-
-        sgAddVec3( lt_trans, lift_vec );
-        gnd_lights_transform->setTransform( lt_trans );
+        sgdVec3 dlt_trans;
+        sgdCopyVec3( dlt_trans, sgdTrans );
+        sgdVec3 dlift_vec;
+        sgdSetVec3( dlift_vec, lift_vec );
+        sgdAddVec3( dlt_trans, dlift_vec );
+        gnd_lights_transform->setTransform( dlt_trans );
 
         // select which set of lights based on sun angle
         float sun_angle = l->get_sun_angle() * SGD_RADIANS_TO_DEGREES;
@@ -388,24 +386,25 @@ void FGTileEntry::prep_ssg_node( const Point3D& p, sgVec3 up, float vis) {
         // we fudge agl by 30 meters so that the lifting function
         // doesn't phase in until we are > 30m agl.
         double agl;
-        agl = globals->get_current_view()->getAltitudeASL_ft()
-            * SG_FEET_TO_METER - globals->get_scenery()->get_cur_elev()
-            - 30.0;
+        agl = globals->get_current_view()->getAltitudeASL_ft()*SG_FEET_TO_METER
+          - globals->get_current_view()->getSGLocation()->get_cur_elev_m()
+          - 30.0;
         if ( agl < 0.0 ) {
             agl = 0.0;
         }
         
         if ( general.get_glDepthBits() > 16 ) {
-            sgScaleVec3( lift_vec, 0.0 + agl / 500.0 );
+            sgScaleVec3( lift_vec, 0.25 + agl / 400.0 + agl*agl / 5000000.0 );
         } else {
-            sgScaleVec3( lift_vec, 0.0 + agl / 150.0 );
+            sgScaleVec3( lift_vec, 0.25 + agl / 150.0 );
         }
 
-        sgVec3 lt_trans;
-        sgCopyVec3( lt_trans, sgTrans );
-
-        sgAddVec3( lt_trans, lift_vec );
-        vasi_lights_transform->setTransform( lt_trans );
+        sgdVec3 dlt_trans;
+        sgdCopyVec3( dlt_trans, sgdTrans );
+        sgdVec3 dlift_vec;
+        sgdSetVec3( dlift_vec, lift_vec );
+        sgdAddVec3( dlt_trans, dlift_vec );
+        vasi_lights_transform->setTransform( dlt_trans );
 
         // generally, vasi lights are always on
         vasi_lights_selector->select(0x01);
@@ -422,24 +421,25 @@ void FGTileEntry::prep_ssg_node( const Point3D& p, sgVec3 up, float vis) {
         // we fudge agl by 30 meters so that the lifting function
         // doesn't phase in until we are > 30m agl.
         double agl;
-        agl = globals->get_current_view()->getAltitudeASL_ft()
-            * SG_FEET_TO_METER - globals->get_scenery()->get_cur_elev()
-            - 30.0;
+        agl = globals->get_current_view()->getAltitudeASL_ft()*SG_FEET_TO_METER
+          - globals->get_current_view()->getSGLocation()->get_cur_elev_m()
+          - 30.0;
         if ( agl < 0.0 ) {
             agl = 0.0;
         }
         
         if ( general.get_glDepthBits() > 16 ) {
-            sgScaleVec3( lift_vec, 0.0 + agl / 500.0 );
+            sgScaleVec3( lift_vec, 0.01 + agl / 400.0 + agl*agl / 5000000.0 );
         } else {
-            sgScaleVec3( lift_vec, 0.0 + agl / 150.0 );
+            sgScaleVec3( lift_vec, 0.25 + agl / 150.0 );
         }
 
-        sgVec3 lt_trans;
-        sgCopyVec3( lt_trans, sgTrans );
-
-        sgAddVec3( lt_trans, lift_vec );
-        rwy_lights_transform->setTransform( lt_trans );
+        sgdVec3 dlt_trans;
+        sgdCopyVec3( dlt_trans, sgdTrans );
+        sgdVec3 dlift_vec;
+        sgdSetVec3( dlift_vec, lift_vec );
+        sgdAddVec3( dlt_trans, dlift_vec );
+        rwy_lights_transform->setTransform( dlt_trans );
 
         // turn runway lights on/off based on sun angle and visibility
         float sun_angle = l->get_sun_angle() * SGD_RADIANS_TO_DEGREES;
@@ -462,24 +462,25 @@ void FGTileEntry::prep_ssg_node( const Point3D& p, sgVec3 up, float vis) {
         // we fudge agl by 30 meters so that the lifting function
         // doesn't phase in until we are > 30m agl.
         double agl;
-        agl = globals->get_current_view()->getAltitudeASL_ft()
-            * SG_FEET_TO_METER - globals->get_scenery()->get_cur_elev()
-            - 30.0;
+        agl = globals->get_current_view()->getAltitudeASL_ft()*SG_FEET_TO_METER
+          - globals->get_current_view()->getSGLocation()->get_cur_elev_m()
+          - 30.0;
         if ( agl < 0.0 ) {
             agl = 0.0;
         }
         
         if ( general.get_glDepthBits() > 16 ) {
-            sgScaleVec3( lift_vec, 0.0 + agl / 500.0 );
+            sgScaleVec3( lift_vec, 0.01 + agl / 400.0 + agl*agl / 5000000.0 );
         } else {
-            sgScaleVec3( lift_vec, 0.0 + agl / 150.0 );
+            sgScaleVec3( lift_vec, 0.25 + agl / 150.0 );
         }
 
-        sgVec3 lt_trans;
-        sgCopyVec3( lt_trans, sgTrans );
-
-        sgAddVec3( lt_trans, lift_vec );
-        taxi_lights_transform->setTransform( lt_trans );
+        sgdVec3 dlt_trans;
+        sgdCopyVec3( dlt_trans, sgdTrans );
+        sgdVec3 dlift_vec;
+        sgdSetVec3( dlift_vec, lift_vec );
+        sgdAddVec3( dlt_trans, dlift_vec );
+        taxi_lights_transform->setTransform( dlt_trans );
 
         // turn taxi lights on/off based on sun angle and visibility
         float sun_angle = l->get_sun_angle() * SGD_RADIANS_TO_DEGREES;
@@ -490,6 +491,55 @@ void FGTileEntry::prep_ssg_node( const Point3D& p, sgVec3 up, float vis) {
             taxi_lights_selector->select(0x00);
         }
     }
+
+    if ( vasi_lights_transform && is_inner_ring ) {
+        // now we need to traverse the list of vasi lights and update
+        // their coloring (but only for the inner ring, no point in
+        // doing this extra work for tiles that are relatively far
+        // away.)
+        for ( int i = 0; i < vasi_lights_transform->getNumKids(); ++i ) {
+            // cout << "vasi root = " << i << endl;
+            ssgBranch *v = (ssgBranch *)vasi_lights_transform->getKid(i);
+            for ( int j = 0; j < v->getNumKids(); ++j ) {
+                // cout << "  vasi branch = " << j << endl;
+                ssgTransform *kid = (ssgTransform *)v->getKid(j);
+                SGVASIUserData *vasi = (SGVASIUserData *)kid->getUserData();
+
+                if ( vasi != NULL ) {
+                    sgdVec3 s;
+                    sgdCopyVec3( s, vasi->get_abs_pos() );
+                    Point3D start(s[0], s[1], s[2]);
+
+                    sgdVec3 d;
+                    sgdCopyVec3( d, globals->get_current_view()->get_absolute_view_pos() );
+
+                    double dist = sgdDistanceVec3( s, d );
+
+                    if ( dist < 10000 ) {
+                        double cur_alt
+                            = globals->get_current_view()->getAltitudeASL_ft()
+                            * SG_FEET_TO_METER;
+
+                        double y = cur_alt - vasi->get_alt_m();
+
+                        double angle;
+                        if ( dist != 0 ) {
+                            angle = asin( y / dist );
+                        } else {
+                            angle = 0.0;
+                        }
+
+                        vasi->set_color(angle * SG_RADIANS_TO_DEGREES);
+                    }
+                    // cout << "    dist = " << dist
+                    //      << " angle = " << angle * SG_RADIANS_TO_DEGREES
+                    //      << endl;
+                } else {
+                    SG_LOG( SG_TERRAIN, SG_ALERT, "no vasi data!" );
+                }
+            }
+        }
+    }
 }
 
 
@@ -610,27 +660,24 @@ bool FGTileEntry::obj_load( const string& path,
 
 
 void
-FGTileEntry::load( const string &base_path, bool is_base )
+FGTileEntry::load( const string_list &path_list, bool is_base )
 {
-    SG_LOG( SG_TERRAIN, SG_INFO, "load() base search path = "
-            << base_path );
-
     bool found_tile_base = false;
 
-    string_list search = sgPathSplit( base_path );
-
     // obj_load() will generate ground lighting for us ...
     ssgVertexArray *light_pts = new ssgVertexArray( 100 );
 
     ssgBranch* new_tile = new ssgBranch;
 
     unsigned int i = 0;
-    while ( i < search.size() && !found_tile_base ) {
+    while ( i < path_list.size() ) {
+
+        bool has_base = false;
 
         // Generate names for later use
         string index_str = tile_bucket.gen_index_str();
 
-        SGPath tile_path = search[i];
+        SGPath tile_path = path_list[i];
         tile_path.append( tile_bucket.gen_base_path() );
 
         SGPath basename = tile_path;
@@ -653,68 +700,89 @@ FGTileEntry::load( const string &base_path, bool is_base )
             while ( ! in.eof() ) {
                 in >> token;
 
+                if ( token[0] == '#' ) {
+                   in >> ::skipeol;
+                   continue;
+                }
+                                // Load only once (first found)
                 if ( token == "OBJECT_BASE" ) {
                     in >> name >> ::skipws;
                     SG_LOG( SG_TERRAIN, SG_INFO, "token = " << token
                             << " name = " << name );
 
-                    found_tile_base = true;
-
-                    SGPath custom_path = tile_path;
-                    custom_path.append( name );
-
-                    ssgBranch *geometry = new ssgBranch;
-                    if ( obj_load( custom_path.str(),
-                                   geometry, NULL, NULL, NULL, light_pts,
-                                   true ) )
-                    {
-                        new_tile -> addKid( geometry );
+                    if (!found_tile_base) {
+                        found_tile_base = true;
+                        has_base = true;
+
+                        SGPath custom_path = tile_path;
+                        custom_path.append( name );
+
+                        ssgBranch *geometry = new ssgBranch;
+                        if ( obj_load( custom_path.str(),
+                                       geometry, NULL, NULL, NULL, light_pts,
+                                       true ) )
+                            {
+                                geometry->getKid( 0 )->setTravCallback( 
+                                                        SSG_CALLBACK_PRETRAV,
+                                                        &FGTileMgr::tile_filter_cb );
+                                new_tile -> addKid( geometry );
+                            } else {
+                                delete geometry;
+                            }
                     } else {
-                        delete geometry;
+                        SG_LOG( SG_TERRAIN, SG_INFO, " (skipped)" );
                     }
-                } else if ( token == "OBJECT" ) {
-                    in >> name >> ::skipws;
-                    SG_LOG( SG_TERRAIN, SG_INFO, "token = " << token
-                            << " name = " << name );
-
-                    SGPath custom_path = tile_path;
-                    custom_path.append( name );
 
-                    ssgBranch *geometry = new ssgBranch;
-                    ssgBranch *vasi_lights = new ssgBranch;
-                    ssgBranch *rwy_lights = new ssgBranch;
-                    ssgBranch *taxi_lights = new ssgBranch;
-                    if ( obj_load( custom_path.str(),
-                                   geometry, vasi_lights, rwy_lights,
-                                   taxi_lights, NULL, false ) )
-                    {
-                        if ( geometry -> getNumKids() > 0 ) {
-                            new_tile -> addKid( geometry );
-                        } else {
-                            delete geometry;
-                        }
-                        if ( vasi_lights -> getNumKids() > 0 ) {
-                            vasi_lights_transform -> addKid( vasi_lights );
-                        } else {
-                            delete vasi_lights;
-                        }
-                        if ( rwy_lights -> getNumKids() > 0 ) {
-                            rwy_lights_transform -> addKid( rwy_lights );
-                        } else {
-                            delete rwy_lights;
-                        }
-                        if ( taxi_lights -> getNumKids() > 0 ) {
-                            taxi_lights_transform -> addKid( taxi_lights );
-                        } else {
-                            delete taxi_lights;
-                        }
-                    } else {
-                        delete geometry;
-                        delete vasi_lights;
-                        delete rwy_lights;
-                        delete taxi_lights;
+                                // Load only if base is not in another file
+                } else if ( token == "OBJECT" ) {
+                    if (!found_tile_base || has_base) {
+                        in >> name >> ::skipws;
+                        SG_LOG( SG_TERRAIN, SG_INFO, "token = " << token
+                                << " name = " << name );
+
+                        SGPath custom_path = tile_path;
+                        custom_path.append( name );
+
+                        ssgBranch *geometry = new ssgBranch;
+                        ssgBranch *vasi_lights = new ssgBranch;
+                        ssgBranch *rwy_lights = new ssgBranch;
+                        ssgBranch *taxi_lights = new ssgBranch;
+                        if ( obj_load( custom_path.str(),
+                                       geometry, vasi_lights, rwy_lights,
+                                       taxi_lights, NULL, false ) )
+                            {
+                                if ( geometry -> getNumKids() > 0 ) {
+                                    geometry->getKid( 0 )->setTravCallback(
+                                                                SSG_CALLBACK_PRETRAV,
+                                                                &FGTileMgr::tile_filter_cb );
+                                    new_tile -> addKid( geometry );
+                                } else {
+                                    delete geometry;
+                                }
+                                if ( vasi_lights -> getNumKids() > 0 ) {
+                                    vasi_lights_transform -> addKid( vasi_lights );
+                                } else {
+                                    delete vasi_lights;
+                                }
+                                if ( rwy_lights -> getNumKids() > 0 ) {
+                                    rwy_lights_transform -> addKid( rwy_lights );
+                                } else {
+                                    delete rwy_lights;
+                                }
+                                if ( taxi_lights -> getNumKids() > 0 ) {
+                                    taxi_lights_transform -> addKid( taxi_lights );
+                                } else {
+                                    delete taxi_lights;
+                                }
+                            } else {
+                                delete geometry;
+                                delete vasi_lights;
+                                delete rwy_lights;
+                                delete taxi_lights;
+                            }
                     }
 
+                                // Always OK to load
                 } else if ( token == "OBJECT_STATIC" ||
                             token == "OBJECT_SHARED" ) {
                     // load object info
@@ -752,8 +820,11 @@ FGTileEntry::load( const string &base_path, bool is_base )
                     FGDeferredModel *dm
                         = new FGDeferredModel( custom_path.str(),
                                                tile_path.str(),
+                                               tile_bucket,
                                                this, obj_trans );
                     FGTileMgr::model_ready( dm );
+
+                                // Do we even use this one?
                 } else if ( token == "OBJECT_TAXI_SIGN" ) {
                     // load object info
                     double lon, lat, elev, hdg;
@@ -783,6 +854,8 @@ FGTileEntry::load( const string &base_path, bool is_base )
                         obj_trans -> addKid( custom_obj );
                     }
                     new_tile->addKid( obj_trans );
+
+                                // Do we even use this one?
                 } else if ( token == "OBJECT_RUNWAY_SIGN" ) {
                     // load object info
                     double lon, lat, elev, hdg;
@@ -812,6 +885,8 @@ FGTileEntry::load( const string &base_path, bool is_base )
                         obj_trans -> addKid( custom_obj );
                     }
                     new_tile->addKid( obj_trans );
+
+                                // I don't think we use this, either
                 } else if ( token == "RWY_LIGHTS" ) {
                     double lon, lat, hdg, len, width;
                     string common, end1, end2;
@@ -824,7 +899,7 @@ FGTileEntry::load( const string &base_path, bool is_base )
                             << " codes = " << common << " "
                             << end1 << " " << end2 );
                 } else {
-                    SG_LOG( SG_TERRAIN, SG_ALERT,
+                    SG_LOG( SG_TERRAIN, SG_DEBUG,
                             "Unknown token " << token << " in "
                             << stg_name.str() );
                     in >> ::skipws;
@@ -841,7 +916,7 @@ FGTileEntry::load( const string &base_path, bool is_base )
         ssgBranch *geometry = new ssgBranch;
         Point3D c;
         double br;
-        if ( sgGenTile( search[0], tile_bucket, &c, &br,
+        if ( sgGenTile( path_list[0], tile_bucket, &c, &br,
                         globals->get_matlib(), geometry ) )
         {
             center = c;
@@ -861,20 +936,16 @@ FGTileEntry::load( const string &base_path, bool is_base )
     terra_transform->addKid( terra_range );
 
     // calculate initial tile offset
-    SetOffset( globals->get_scenery()->get_center() );
-    sgCoord sgcoord;
-    sgSetCoord( &sgcoord,
-                offset.x(), offset.y(), offset.z(),
-                0.0, 0.0, 0.0 );
-    terra_transform->setTransform( &sgcoord );
-    // terrain->addKid( terra_transform );
+    sgdVec3 sgdTrans;
+    sgdSetVec3( sgdTrans, center.x(), center.y(), center.z() );
+    terra_transform->setTransform( sgdTrans );
 
     // Add ground lights to scene graph if any exist
     gnd_lights_transform = NULL;
     gnd_lights_range = NULL;
     if ( light_pts->getNum() ) {
         SG_LOG( SG_TERRAIN, SG_DEBUG, "generating lights" );
-        gnd_lights_transform = new ssgTransform;
+        gnd_lights_transform = new ssgPlacementTransform;
         gnd_lights_range = new ssgRangeSelector;
         gnd_lights_brightness = new ssgSelector;
         ssgLeaf *lights;
@@ -890,25 +961,40 @@ FGTileEntry::load( const string &base_path, bool is_base )
 
         gnd_lights_range->addKid( gnd_lights_brightness );
         gnd_lights_transform->addKid( gnd_lights_range );
-        gnd_lights_transform->setTransform( &sgcoord );
+        gnd_lights_transform->setTransform( sgdTrans );
     }
 
     // Update vasi lights transform
     if ( vasi_lights_transform->getNumKids() > 0 ) {
-        vasi_lights_transform->setTransform( &sgcoord );
+        vasi_lights_transform->setTransform( sgdTrans );
     }
 
     // Update runway lights transform
     if ( rwy_lights_transform->getNumKids() > 0 ) {
-        rwy_lights_transform->setTransform( &sgcoord );
+        rwy_lights_transform->setTransform( sgdTrans );
     }
 
      // Update taxi lights transform
     if ( taxi_lights_transform->getNumKids() > 0 ) {
-        taxi_lights_transform->setTransform( &sgcoord );
+        taxi_lights_transform->setTransform( sgdTrans );
     }
+
+    delete light_pts;
 }
 
+void
+FGTileEntry::makeDList( ssgBranch *b )
+{
+    int nb = b->getNumKids();
+    for (int i = 0; i<nb; i++) {
+        ssgEntity *e = b->getKid(i);
+        if (e->isAKindOf(ssgTypeLeaf())) {
+            ((ssgLeaf*)e)->makeDList();
+        } else if (e->isAKindOf(ssgTypeBranch())) {
+            makeDList( (ssgBranch*)e );
+        }
+    }
+}
 
 void
 FGTileEntry::add_ssg_nodes( ssgBranch *terrain_branch,
@@ -919,8 +1005,15 @@ FGTileEntry::add_ssg_nodes( ssgBranch *terrain_branch,
 {
     // bump up the ref count so we can remove this later without
     // having ssg try to free the memory.
+#if PLIB_VERSION > 183
+    if ( fgGetBool( "/sim/rendering/use-display-list", true ) ) {
+        makeDList( terra_transform );
+    }
+#endif
+
     terra_transform->ref();
     terrain_branch->addKid( terra_transform );
+    globals->get_scenery()->register_placement_transform(terra_transform);
 
     SG_LOG( SG_TERRAIN, SG_DEBUG,
             "connected a tile into scene graph.  terra_transform = "
@@ -933,6 +1026,7 @@ FGTileEntry::add_ssg_nodes( ssgBranch *terrain_branch,
         // having ssg try to free the memory.
         gnd_lights_transform->ref();
         gnd_lights_branch->addKid( gnd_lights_transform );
+        globals->get_scenery()->register_placement_transform(gnd_lights_transform);
     }
 
     if ( vasi_lights_transform != NULL ) {
@@ -940,6 +1034,7 @@ FGTileEntry::add_ssg_nodes( ssgBranch *terrain_branch,
         // having ssg try to free the memory.
         vasi_lights_selector->ref();
         vasi_lights_selector->addKid( vasi_lights_transform );
+        globals->get_scenery()->register_placement_transform(vasi_lights_transform);
         vasi_lights_branch->addKid( vasi_lights_selector );
     }
 
@@ -948,6 +1043,7 @@ FGTileEntry::add_ssg_nodes( ssgBranch *terrain_branch,
         // having ssg try to free the memory.
         rwy_lights_selector->ref();
         rwy_lights_selector->addKid( rwy_lights_transform );
+        globals->get_scenery()->register_placement_transform(rwy_lights_transform);
         rwy_lights_branch->addKid( rwy_lights_selector );
     }
 
@@ -956,6 +1052,7 @@ FGTileEntry::add_ssg_nodes( ssgBranch *terrain_branch,
         // having ssg try to free the memory.
         taxi_lights_selector->ref();
         taxi_lights_selector->addKid( taxi_lights_transform );
+        globals->get_scenery()->register_placement_transform(taxi_lights_transform);
         taxi_lights_branch->addKid( taxi_lights_selector );
     }
 
@@ -974,6 +1071,9 @@ FGTileEntry::disconnect_ssg_nodes()
         SG_LOG( SG_TERRAIN, SG_DEBUG, "removing a fully loaded tile!  terra_transform = " << terra_transform );
     }
         
+    // Unregister that one at the scenery manager
+    globals->get_scenery()->unregister_placement_transform(terra_transform);
+
     // find the terrain branch parent
     int pcount = terra_transform->getNumParents();
     if ( pcount > 0 ) {
@@ -996,6 +1096,8 @@ FGTileEntry::disconnect_ssg_nodes()
 
     // find the ground lighting branch
     if ( gnd_lights_transform ) {
+        // Unregister that one at the scenery manager
+        globals->get_scenery()->unregister_placement_transform(gnd_lights_transform);
         pcount = gnd_lights_transform->getNumParents();
         if ( pcount > 0 ) {
             // find the first parent (should only be one)
@@ -1018,6 +1120,8 @@ FGTileEntry::disconnect_ssg_nodes()
 
     // find the vasi lighting branch
     if ( vasi_lights_transform ) {
+        // Unregister that one at the scenery manager
+        globals->get_scenery()->unregister_placement_transform(vasi_lights_transform);
         pcount = vasi_lights_transform->getNumParents();
         if ( pcount > 0 ) {
             // find the first parent (should only be one)
@@ -1040,6 +1144,8 @@ FGTileEntry::disconnect_ssg_nodes()
 
     // find the runway lighting branch
     if ( rwy_lights_transform ) {
+        // Unregister that one at the scenery manager
+        globals->get_scenery()->unregister_placement_transform(rwy_lights_transform);
         pcount = rwy_lights_transform->getNumParents();
         if ( pcount > 0 ) {
             // find the first parent (should only be one)
@@ -1062,6 +1168,8 @@ FGTileEntry::disconnect_ssg_nodes()
 
     // find the taxi lighting branch
     if ( taxi_lights_transform ) {
+        // Unregister that one at the scenery manager
+        globals->get_scenery()->unregister_placement_transform(taxi_lights_transform);
         pcount = taxi_lights_transform->getNumParents();
         if ( pcount > 0 ) {
             // find the first parent (should only be one)