1 // tileentry.cxx -- routines to handle a scenery tile
3 // Written by Curtis Olson, started May 1998.
5 // Copyright (C) 1998 - 2001 Curtis L. Olson - http://www.flightgear.org/~curt
7 // This program is free software; you can redistribute it and/or
8 // modify it under the terms of the GNU General Public License as
9 // published by the Free Software Foundation; either version 2 of the
10 // License, or (at your option) any later version.
12 // This program is distributed in the hope that it will be useful, but
13 // WITHOUT ANY WARRANTY; without even the implied warranty of
14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 // General Public License for more details.
17 // You should have received a copy of the GNU General Public License
18 // along with this program; if not, write to the Free Software
19 // Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
28 #include <simgear/compiler.h>
30 #include <Main/main.hxx>
37 #include <osg/Geometry>
40 #include <osg/MatrixTransform>
41 #include <osg/NodeCallback>
44 #include <osgDB/FileNameUtils>
45 #include <osgDB/ReaderWriter>
46 #include <osgDB/ReadFile>
47 #include <osgDB/Registry>
49 #include <simgear/bucket/newbucket.hxx>
50 #include <simgear/debug/logstream.hxx>
51 #include <simgear/math/polar3d.hxx>
52 #include <simgear/math/sg_geodesy.hxx>
53 #include <simgear/math/sg_random.h>
54 #include <simgear/misc/sgstream.hxx>
55 #include <simgear/scene/material/mat.hxx>
56 #include <simgear/scene/material/matlib.hxx>
57 #include <simgear/scene/model/ModelRegistry.hxx>
58 #include <simgear/scene/tgdb/apt_signs.hxx>
59 #include <simgear/scene/tgdb/obj.hxx>
60 #include <simgear/scene/tgdb/SGReaderWriterBTGOptions.hxx>
61 #include <simgear/scene/model/placementtrans.hxx>
62 #include <simgear/scene/util/SGUpdateVisitor.hxx>
64 #include <Aircraft/aircraft.hxx>
65 #include <Include/general.hxx>
66 #include <Main/fg_props.hxx>
67 #include <Main/globals.hxx>
68 #include <Main/viewer.hxx>
69 #include <Scenery/scenery.hxx>
70 #include <Time/light.hxx>
72 #include "tileentry.hxx"
73 #include "tilemgr.hxx"
76 using namespace simgear;
78 // FIXME: investigate what huge update flood is clamped away here ...
79 class FGTileUpdateCallback : public osg::NodeCallback {
81 virtual void operator()(osg::Node* node, osg::NodeVisitor* nv)
83 assert(dynamic_cast<SGUpdateVisitor*>(nv));
84 SGUpdateVisitor* updateVisitor = static_cast<SGUpdateVisitor*>(nv);
86 osg::Vec3 center = node->getBound().center();
87 double distance = dist(updateVisitor->getGlobalEyePos(),
88 SGVec3d(center[0], center[1], center[2]));
89 if (updateVisitor->getVisibility() + node->getBound().radius() < distance)
97 FGTileEntry::FGTileEntry ( const SGBucket& b )
99 terra_transform( new osg::Group ),
100 terra_range( new osg::LOD ),
103 is_inner_ring(false),
106 terra_transform->setUpdateCallback(new FGTileUpdateCallback);
111 FGTileEntry::~FGTileEntry () {
114 static void WorldCoordinate( osg::Matrix& obj_pos, double lat,
115 double lon, double elev, double hdg )
117 double lon_rad = lon * SGD_DEGREES_TO_RADIANS;
118 double lat_rad = lat * SGD_DEGREES_TO_RADIANS;
119 double hdg_rad = hdg * SGD_DEGREES_TO_RADIANS;
122 Point3D geod( lon_rad, lat_rad, elev );
123 Point3D world_pos = sgGeodToCart( geod );
125 double sin_lat = sin( lat_rad );
126 double cos_lat = cos( lat_rad );
127 double cos_lon = cos( lon_rad );
128 double sin_lon = sin( lon_rad );
129 double sin_hdg = sin( hdg_rad ) ;
130 double cos_hdg = cos( hdg_rad ) ;
132 obj_pos(0, 0) = cos_hdg * sin_lat * cos_lon - sin_hdg * sin_lon;
133 obj_pos(0, 1) = cos_hdg * sin_lat * sin_lon + sin_hdg * cos_lon;
134 obj_pos(0, 2) = -cos_hdg * cos_lat;
135 obj_pos(0, 3) = SG_ZERO;
137 obj_pos(1, 0) = -sin_hdg * sin_lat * cos_lon - cos_hdg * sin_lon;
138 obj_pos(1, 1) = -sin_hdg * sin_lat * sin_lon + cos_hdg * cos_lon;
139 obj_pos(1, 2) = sin_hdg * cos_lat;
140 obj_pos(1, 3) = SG_ZERO;
142 obj_pos(2, 0) = cos_lat * cos_lon;
143 obj_pos(2, 1) = cos_lat * sin_lon;
144 obj_pos(2, 2) = sin_lat;
145 obj_pos(2, 3) = SG_ZERO;
147 obj_pos(3, 0) = world_pos.x();
148 obj_pos(3, 1) = world_pos.y();
149 obj_pos(3, 2) = world_pos.z();
150 obj_pos(3, 3) = SG_ONE ;
154 // Free "n" leaf elements of an ssg tree. returns the number of
155 // elements freed. An empty branch node is considered a leaf. This
156 // is intended to spread the load of freeing a complex tile out over
158 static int fgPartialFreeSSGtree( osg::Group *b, int n ) {
159 int num_deletes = b->getNumChildren();
161 b->removeChildren(0, b->getNumChildren());
167 // Clean up the memory used by this tile and delete the arrays used by
168 // ssg as well as the whole ssg branch
169 bool FGTileEntry::free_tile() {
170 int delete_size = 100;
171 SG_LOG( SG_TERRAIN, SG_DEBUG,
172 "FREEING TILE = (" << tile_bucket << ")" );
174 SG_LOG( SG_TERRAIN, SG_DEBUG, "(start) free_tracker = " << free_tracker );
176 if ( !(free_tracker & NODES) ) {
177 free_tracker |= NODES;
178 } else if ( !(free_tracker & VEC_PTRS) ) {
179 free_tracker |= VEC_PTRS;
180 } else if ( !(free_tracker & TERRA_NODE) ) {
181 // delete the terrain branch (this should already have been
182 // disconnected from the scene graph)
183 SG_LOG( SG_TERRAIN, SG_DEBUG, "FREEING terra_transform" );
184 if ( fgPartialFreeSSGtree( terra_transform.get(), delete_size ) == 0 ) {
186 free_tracker |= TERRA_NODE;
188 } else if ( !(free_tracker & LIGHTMAPS) ) {
189 free_tracker |= LIGHTMAPS;
194 SG_LOG( SG_TERRAIN, SG_DEBUG, "(end) free_tracker = " << free_tracker );
196 // if we fall down to here, we still have work todo, return false
201 // Update the ssg transform node for this tile so it can be
202 // properly drawn relative to our (0,0,0) point
203 void FGTileEntry::prep_ssg_node(float vis) {
204 if ( !loaded ) return;
206 // visibility can change from frame to frame so we update the
207 // range selector cutoff's each time.
208 float bounding_radius = terra_range->getChild(0)->getBound().radius();
209 terra_range->setRange( 0, 0, vis + bounding_radius );
212 bool FGTileEntry::obj_load( const string& path,
213 osg::Group *geometry, bool is_base )
215 bool use_random_objects =
216 fgGetBool("/sim/rendering/random-objects", true);
218 // try loading binary format
219 osg::ref_ptr<SGReaderWriterBTGOptions> options
220 = new SGReaderWriterBTGOptions();
221 options->setMatlib(globals->get_matlib());
222 options->setCalcLights(is_base);
223 options->setUseRandomObjects(use_random_objects);
224 osg::Node* node = osgDB::readNodeFile(path, options.get());
226 geometry->addChild(node);
241 // storage class for deferred object processing in FGTileEntry::load()
243 Object(object_type t, const string& token, const SGPath& p, istream& in)
248 in >> lon >> lat >> elev >> hdg;
252 SG_LOG(SG_TERRAIN, SG_INFO, " " << token << " " << name);
254 SG_LOG(SG_TERRAIN, SG_INFO, " " << token << " " << name << " lon=" <<
255 lon << " lat=" << lat << " elev=" << elev << " hdg=" << hdg);
260 double lon, lat, elev, hdg;
263 // Work in progress... load the tile based entirely by name cuz that's
264 // what we'll want to do with the database pager.
266 FGTileEntry::load( const string_list &path_list, bool is_base )
268 osgDB::ReaderWriter::ReadResult result
269 = osgDB::Registry::instance()->readNode(tile_bucket.gen_index_str()
271 if (result.validNode()) {
272 osg::Node* new_tile = result.getNode();
273 terra_range->addChild( new_tile );
275 terra_transform->addChild( terra_range.get() );
279 FGTileEntry::loadTileByName(const string& index_str,
280 const string_list &path_list)
284 istringstream idxStream(index_str);
285 idxStream >> tileIndex;
287 SGBucket tile_bucket(tileIndex);
288 const string basePath = tile_bucket.gen_base_path();
290 bool found_tile_base = false;
293 vector<const Object*> objects;
295 SG_LOG( SG_TERRAIN, SG_INFO, "Loading tile " << index_str );
297 // scan and parse all files and store information
298 for (unsigned int i = 0; i < path_list.size(); i++) {
299 // If we found a terrain tile in Terrain/, we have to process the
300 // Objects/ dir in the same group, too, before we can stop scanning.
301 // FGGlobals::set_fg_scenery() inserts an empty string to path_list
303 if (path_list[i].empty()) {
310 bool has_base = false;
312 SGPath tile_path = path_list[i];
313 tile_path.append(basePath);
315 SGPath basename = tile_path;
316 basename.append( index_str );
318 SG_LOG( SG_TERRAIN, SG_INFO, " Trying " << basename.str() );
321 // Check for master .stg (scene terra gear) file
322 SGPath stg_name = basename;
323 stg_name.concat( ".stg" );
325 sg_gzifstream in( stg_name.str() );
329 while ( ! in.eof() ) {
333 if ( token.empty() || token[0] == '#' ) {
337 // Load only once (first found)
338 if ( token == "OBJECT_BASE" ) {
340 in >> name >> ::skipws;
341 SG_LOG( SG_TERRAIN, SG_INFO, " " << token << " " << name );
343 if (!found_tile_base) {
344 found_tile_base = true;
347 object_base = tile_path;
348 object_base.append(name);
351 SG_LOG(SG_TERRAIN, SG_INFO, " (skipped)");
353 // Load only if base is not in another file
354 } else if ( token == "OBJECT" ) {
355 if (!found_tile_base || has_base)
356 objects.push_back(new Object(OBJECT, token, tile_path, in));
359 in >> name >> ::skipeol;
360 SG_LOG(SG_TERRAIN, SG_INFO, " " << token << " "
361 << name << " (skipped)");
365 } else if ( token == "OBJECT_STATIC" ) {
366 objects.push_back(new Object(OBJECT_STATIC, token, tile_path, in));
368 } else if ( token == "OBJECT_SHARED" ) {
369 objects.push_back(new Object(OBJECT_SHARED, token, tile_path, in));
371 } else if ( token == "OBJECT_SIGN" ) {
372 objects.push_back(new Object(OBJECT_SIGN, token, tile_path, in));
374 } else if ( token == "OBJECT_RUNWAY_SIGN" ) {
375 objects.push_back(new Object(OBJECT_RUNWAY_SIGN, token, tile_path, in));
378 SG_LOG( SG_TERRAIN, SG_DEBUG,
379 "Unknown token '" << token << "' in " << stg_name.str() );
386 // obj_load() will generate ground lighting for us ...
387 osg::Group* new_tile = new osg::Group;
389 if (found_tile_base) {
390 // load tile if found ...
391 obj_load( object_base.str(), new_tile, true );
394 // ... or generate an ocean tile on the fly
395 SG_LOG(SG_TERRAIN, SG_INFO, " Generating ocean tile");
396 if ( !SGGenTile( path_list[0], tile_bucket,
397 globals->get_matlib(), new_tile ) ) {
398 SG_LOG( SG_TERRAIN, SG_ALERT,
399 "Warning: failed to generate ocean tile!" );
404 // now that we have a valid center, process all the objects
405 for (unsigned int j = 0; j < objects.size(); j++) {
406 const Object *obj = objects[j];
408 if (obj->type == OBJECT) {
409 SGPath custom_path = obj->path;
410 custom_path.append( obj->name );
411 obj_load( custom_path.str(), new_tile, false );
413 } else if (obj->type == OBJECT_SHARED || obj->type == OBJECT_STATIC) {
414 // object loading is deferred to main render thread,
415 // but lets figure out the paths right now.
417 if ( obj->type == OBJECT_STATIC ) {
418 custom_path = obj->path;
420 custom_path = globals->get_fg_root();
422 custom_path.append( obj->name );
425 WorldCoordinate( obj_pos, obj->lat, obj->lon, obj->elev, obj->hdg );
427 osg::MatrixTransform *obj_trans = new osg::MatrixTransform;
428 obj_trans->setMatrix( obj_pos );
430 // wire as much of the scene graph together as we can
431 new_tile->addChild( obj_trans );
434 = FGTileMgr::loadTileModel(custom_path.str(),
435 obj->type == OBJECT_SHARED);
437 obj_trans->addChild(model);
438 } else if (obj->type == OBJECT_SIGN || obj->type == OBJECT_RUNWAY_SIGN) {
439 // load the object itself
440 SGPath custom_path = obj->path;
441 custom_path.append( obj->name );
444 WorldCoordinate( obj_pos, obj->lat, obj->lon, obj->elev, obj->hdg );
446 osg::MatrixTransform *obj_trans = new osg::MatrixTransform;
447 obj_trans->setMatrix( obj_pos );
449 osg::Node *custom_obj = 0;
450 if (obj->type == OBJECT_SIGN)
451 custom_obj = SGMakeSign(globals->get_matlib(), custom_path.str(), obj->name);
453 custom_obj = SGMakeRunwaySign(globals->get_matlib(), custom_path.str(), obj->name);
455 // wire the pieces together
456 if ( custom_obj != NULL ) {
457 obj_trans -> addChild( custom_obj );
459 new_tile->addChild( obj_trans );
468 FGTileEntry::add_ssg_nodes( osg::Group *terrain_branch )
470 // bump up the ref count so we can remove this later without
471 // having ssg try to free the memory.
472 terrain_branch->addChild( terra_transform.get() );
474 SG_LOG( SG_TERRAIN, SG_DEBUG,
475 "connected a tile into scene graph. terra_transform = "
476 << terra_transform.get() );
477 SG_LOG( SG_TERRAIN, SG_DEBUG, "num parents now = "
478 << terra_transform->getNumParents() );
485 FGTileEntry::disconnect_ssg_nodes()
487 SG_LOG( SG_TERRAIN, SG_DEBUG, "disconnecting ssg nodes" );
490 SG_LOG( SG_TERRAIN, SG_DEBUG, "removing a not-fully loaded tile!" );
492 SG_LOG( SG_TERRAIN, SG_DEBUG, "removing a fully loaded tile! terra_transform = " << terra_transform.get() );
495 // find the terrain branch parent
496 int pcount = terra_transform->getNumParents();
498 // find the first parent (should only be one)
499 osg::Group *parent = terra_transform->getParent( 0 ) ;
501 // disconnect the tile (we previously ref()'d it so it
502 // won't get freed now)
503 parent->removeChild( terra_transform.get() );
505 SG_LOG( SG_TERRAIN, SG_ALERT,
506 "parent pointer is NULL! Dying" );
510 SG_LOG( SG_TERRAIN, SG_ALERT,
511 "Parent count is zero for an ssg tile! Dying" );
519 class ReaderWriterSTG : public osgDB::ReaderWriter {
521 virtual const char* className() const;
523 virtual bool acceptsExtension(const string& extension) const;
525 virtual ReadResult readNode(const string& fileName,
526 const osgDB::ReaderWriter::Options* options)
530 const char* ReaderWriterSTG::className() const
532 return "STG Database reader";
535 bool ReaderWriterSTG::acceptsExtension(const string& extension) const
537 return (osgDB::equalCaseInsensitive(extension, "gz")
538 || osgDB::equalCaseInsensitive(extension, "stg"));
541 osgDB::ReaderWriter::ReadResult
542 ReaderWriterSTG::readNode(const string& fileName,
543 const osgDB::ReaderWriter::Options* options) const
545 string ext = osgDB::getLowerCaseFileExtension(fileName);
546 if(!acceptsExtension(ext))
547 return ReadResult::FILE_NOT_HANDLED;
549 if (osgDB::equalCaseInsensitive(ext, "gz")) {
550 stgFileName = osgDB::getNameLessExtension(fileName);
551 if (!acceptsExtension(
552 osgDB::getLowerCaseFileExtension(stgFileName))) {
553 return ReadResult::FILE_NOT_HANDLED;
556 stgFileName = fileName;
559 = FGTileEntry::loadTileByName(osgDB::getNameLessExtension(stgFileName),
560 globals->get_fg_scenery());
562 return result; // Constructor converts to ReadResult
564 return ReadResult::FILE_NOT_HANDLED;
567 osgDB::RegisterReaderWriterProxy<ReaderWriterSTG> g_readerWriterSTGProxy;
568 ModelRegistryCallbackProxy<LoadOnlyCallback> g_stgCallbackProxy("stg");