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source: osgVisual/trunk/src/object/visual_object.cpp @ 222

Last change on this file since 222 was 222, checked in by Torben Dannhauer, 13 years ago
Object definition via XML file: Angels are now interpreted as degree.
File size: 21.6 KB

Line
1	/* --c++-- osgVisual - Copyright (C) 2009-2011 Torben Dannhauer
2	*
3	* This library is based on OpenSceneGraph, open source and may be redistributed and/or modified under
4	* the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
5	* (at your option) any later version. The full license is in LICENSE file
6	* included with this distribution, and on the openscenegraph.org website.
7	*
8	* osgVisual requires for some proprietary modules a license from the correspondig manufacturer.
9	* You have to aquire licenses for all used proprietary modules.
10	*
11	* This library is distributed in the hope that it will be useful,
12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14	* OpenSceneGraph Public License for more details.
15	*/
16
17	#include <visual_object.h>
18
19	using namespace osgVisual;
20
21	visual_object::visual_object( osg::CoordinateSystemNode* sceneRoot_, std::string nodeName_)
22	{
23	// Add this node to Scenegraph
24	sceneRoot_->addChild( this );
25
26	// Set Nodename for further identification
27	this->setName( nodeName_ );
28
29	// Set callback.
30	/** \todo: welcher update ist der richtige? voraussichtlich event.) */
31	//this->setUpdateCallback( new visual_objectPositionCallback() );
32	this->setEventCallback( new visual_objectPositionCallback() );
33
34	// Init Position and Attitude
35	lat = 0;
36	lon = 0;
37	alt = 0;
38
39	azimuthAngle_psi = 0;
40	pitchAngle_theta = 0;
41	bankAngle_phi = 0;
42
43	geometry_offset_rotation.makeRotate( 0.0, 1.0, 1.0, 1.0 );
44
45	// Init Scale factor
46	scaleX = 1.0;
47	scaleY = 1.0;
48	scaleZ = 1.0;
49
50	// Init cameraOffset
51	cameraTranslationOffset.makeTranslate( osg::Vec3d(0.0, 0.0, 0.0) ); // Trans: (y, x, -z_down)
52	cameraRotationOffset.makeRotate( osg::DegreesToRadians( 90.0 ), osg::Vec3(1, 0, 0) ); // Rot: (-y, +x , -z)
53
54	//setCameraOffsetTranslation(0.0, -150.0, 50.0); // Trans: (rechts davon, longitudinal, vertikal)
55	setCameraOffsetTranslation( 150.0, 0.0, 30.0);
56	setCameraOffsetRotation( osg::DegreesToRadians(0.0), osg::DegreesToRadians(-15.0), osg::DegreesToRadians(-90.0) );
57
58	// Geometrynode hinzufügen
59	geometry = new osg::Group();
60	this->addChild( geometry );
61	unsetGeometry(); // adds an osg::Node as geometry to make the visual_object trackable for node trackers.
62
63	// Tracking ID
64	trackingId = -1;
65
66	// Labelnode hinzufügen
67	labels = new osg::Geode();
68	this->addChild( labels );
69	}
70
71	visual_object::~visual_object()
72	{
73
74	}
75
76	visual_object* visual_object::createNodeFromXMLConfig(osg::CoordinateSystemNode* sceneRoot_, xmlNode* a_node)
77	{
78	if(a_node == NULL)
79	return NULL;
80
81	OSG_NOTIFY( osg::ALWAYS ) << __FUNCTION__ << " - Try to creating a new Model.." << std::endl;
82
83	// Prepare Variables
84	std::string objectname="", filename="", label="";
85	bool dynamic = false;
86	int trackingID=-1;
87	double lat=0.0, lon=0.0, alt=0.0, rot_x=0.0, rot_y=0.0, rot_z=0.0;
88	double cam_trans_x=0.0, cam_trans_y=0.0, cam_trans_z=0.0, cam_rot_x=0.0, cam_rot_y=0.0, cam_rot_z=0.0;
89	double geometry_rot_x=0.0, geometry_rot_y=0.0, geometry_rot_z=0.0;
90	double geometry_scale_x=1.0, geometry_scale_y=1.0, geometry_scale_z=1.0;
91	osg::ref_ptr<osgVisual::object_updater> updater = NULL;
92	std::string updater_lat="", updater_lon="", updater_alt="", updater_rot_x="", updater_rot_y="", updater_rot_z="", updater_label="";
93
94	// extract model properties
95	xmlAttr *attr = a_node->properties;
96	while ( attr )
97	{
98	std::string attr_name=reinterpret_cast<const char*>(attr->name);
99	std::string attr_value=reinterpret_cast<const char*>(attr->children->content);
100	if( attr_name == "objectname" ) objectname = attr_value;
101	if( attr_name == "trackingid" ) trackingID = util::strToInt(attr_value);
102	if( attr_name == "label" ) label = attr_value;
103	if( attr_name == "dynamic" ) dynamic = util::strToBool(attr_value);
104
105	attr = attr->next;
106	}
107	for (xmlNode *cur_node = a_node->children; cur_node; cur_node = cur_node->next)
108	{
109	std::string node_name=reinterpret_cast<const char*>(cur_node->name);
110
111	if(cur_node->type == XML_ELEMENT_NODE && node_name == "position")
112	{
113	xmlAttr *attr = cur_node->properties;
114	while ( attr )
115	{
116	std::string attr_name=reinterpret_cast<const char*>(attr->name);
117	std::string attr_value=reinterpret_cast<const char*>(attr->children->content);
118	if( attr_name == "lat" ) lat = osg::DegreesToRadians(util::strToDouble(attr_value));
119	if( attr_name == "lon" ) lon = osg::DegreesToRadians(util::strToDouble(attr_value));
120	if( attr_name == "alt" ) alt = util::strToDouble(attr_value);
121
122	attr = attr->next;
123	}
124	}
125
126	if(cur_node->type == XML_ELEMENT_NODE && node_name == "attitude")
127	{
128	xmlAttr *attr = cur_node->properties;
129	while ( attr )
130	{
131	std::string attr_name=reinterpret_cast<const char*>(attr->name);
132	std::string attr_value=reinterpret_cast<const char*>(attr->children->content);
133	if( attr_name == "rot_x" ) rot_x = osg::DegreesToRadians(util::strToDouble(attr_value));
134	if( attr_name == "rot_y" ) rot_y = osg::DegreesToRadians(util::strToDouble(attr_value));
135	if( attr_name == "rot_z" ) rot_z = osg::DegreesToRadians(util::strToDouble(attr_value));
136
137	attr = attr->next;
138	}
139	}
140
141	if(cur_node->type == XML_ELEMENT_NODE && node_name == "updater")
142	{
143	for (xmlNode *sub_cur_node = cur_node->children; sub_cur_node; sub_cur_node = sub_cur_node->next)
144	{
145	std::string sub_node_name=reinterpret_cast<const char*>(cur_node->children->name);
146	if(sub_cur_node->type == XML_ELEMENT_NODE && sub_node_name == "position")
147	{
148	xmlAttr *attr = sub_cur_node->properties;
149	while ( attr )
150	{
151	std::string attr_name=reinterpret_cast<const char*>(attr->name);
152	std::string attr_value=reinterpret_cast<const char*>(attr->children->content);
153	if( attr_name == "lat" )
154	updater_lat = attr_value;
155	if( attr_name == "lon" )
156	updater_lon = attr_value;
157	if( attr_name == "alt" )
158	updater_alt = attr_value;
159	attr = attr->next;
160	}
161	}
162	if(sub_cur_node->type == XML_ELEMENT_NODE && sub_node_name == "attitude")
163	{
164	xmlAttr *attr = sub_cur_node->properties;
165	while ( attr )
166	{
167	std::string attr_name=reinterpret_cast<const char*>(attr->name);
168	std::string attr_value=reinterpret_cast<const char*>(attr->children->content);
169	if( attr_name == "rot_x" )
170	updater_rot_x = attr_value;
171	if( attr_name == "rot_y" )
172	updater_rot_y = attr_value;
173	if( attr_name == "rot_z" )
174	updater_rot_z = attr_value;
175	attr = attr->next;
176	}
177	}
178	if(sub_cur_node->type == XML_ELEMENT_NODE && sub_node_name == "label")
179	{
180	xmlAttr *attr = sub_cur_node->properties;
181	while ( attr )
182	{
183	std::string attr_name=reinterpret_cast<const char*>(attr->name);
184	std::string attr_value=reinterpret_cast<const char*>(attr->children->content);
185	if( attr_name == "text" )
186	updater_label = attr_value;
187	attr = attr->next;
188	}
189	}
190	}
191	}
192
193	if(cur_node->type == XML_ELEMENT_NODE && node_name == "cameraoffset")
194	{
195	for (xmlNode *sub_cur_node = cur_node->children; sub_cur_node; sub_cur_node = sub_cur_node->next)
196	{
197	std::string sub_node_name=reinterpret_cast<const char*>(cur_node->children->name);
198	if(sub_cur_node->type == XML_ELEMENT_NODE && sub_node_name == "translation")
199	{
200	xmlAttr *attr = sub_cur_node->properties;
201	while ( attr )
202	{
203	std::string attr_name=reinterpret_cast<const char*>(attr->name);
204	std::string attr_value=reinterpret_cast<const char*>(attr->children->content);
205	if( attr_name == "trans_x" ) cam_trans_x = util::strToDouble(attr_value);
206	if( attr_name == "trans_y" ) cam_trans_y = util::strToDouble(attr_value);
207	if( attr_name == "trans_z" ) cam_trans_z = util::strToDouble(attr_value);
208
209	attr = attr->next;
210	}
211	}
212	if(sub_cur_node->type == XML_ELEMENT_NODE && sub_node_name == "rotation")
213	{
214	xmlAttr *attr = sub_cur_node->properties;
215	while ( attr )
216	{
217	std::string attr_name=reinterpret_cast<const char*>(attr->name);
218	std::string attr_value=reinterpret_cast<const char*>(attr->children->content);
219	if( attr_name == "rot_x" ) cam_rot_x = osg::DegreesToRadians(util::strToDouble(attr_value));
220	if( attr_name == "rot_y" ) cam_rot_y = osg::DegreesToRadians(util::strToDouble(attr_value));
221	if( attr_name == "rot_z" ) cam_rot_z = osg::DegreesToRadians(util::strToDouble(attr_value));
222
223	attr = attr->next;
224	}
225	}
226	}
227	}
228
229	if(cur_node->type == XML_ELEMENT_NODE && node_name == "geometry")
230	{
231	// extract filename
232	xmlAttr *attr = cur_node->properties;
233	while ( attr )
234	{
235	std::string attr_name=reinterpret_cast<const char*>(attr->name);
236	std::string attr_value=reinterpret_cast<const char*>(attr->children->content);
237	if( attr_name == "filename" )
238	filename = attr_value;
239	attr = attr->next;
240	}
241
242	// Extract optional settings
243	for (xmlNode *sub_cur_node = cur_node->children; sub_cur_node; sub_cur_node = sub_cur_node->next)
244	{
245	std::string sub_node_name=reinterpret_cast<const char*>(sub_cur_node->name);
246	if(sub_cur_node->type == XML_ELEMENT_NODE && sub_node_name == "offset")
247	{
248	xmlAttr *attr = sub_cur_node->properties;
249	while ( attr )
250	{
251	std::string attr_name=reinterpret_cast<const char*>(attr->name);
252	std::string attr_value=reinterpret_cast<const char*>(attr->children->content);
253	if( attr_name == "rot_x" ) geometry_rot_x = osg::DegreesToRadians(util::strToDouble(attr_value));
254	if( attr_name == "rot_y" ) geometry_rot_y = osg::DegreesToRadians(util::strToDouble(attr_value));
255	if( attr_name == "rot_z" ) geometry_rot_z = osg::DegreesToRadians(util::strToDouble(attr_value));
256
257	attr = attr->next;
258	}
259	}
260	if(sub_cur_node->type == XML_ELEMENT_NODE && sub_node_name == "scalefactor")
261	{
262	xmlAttr *attr = sub_cur_node->properties;
263	while ( attr )
264	{
265	std::string attr_name=reinterpret_cast<const char*>(attr->name);
266	std::string attr_value=reinterpret_cast<const char*>(attr->children->content);
267	if( attr_name == "scale_x" ) geometry_scale_x = util::strToDouble(attr_value);
268	if( attr_name == "scale_y" ) geometry_scale_y = util::strToDouble(attr_value);
269	if( attr_name == "scale_z" ) geometry_scale_z = util::strToDouble(attr_value);
270
271	attr = attr->next;
272	}
273	}
274	}
275	}
276	}
277
278
279	osgVisual::visual_object* object = new osgVisual::visual_object( sceneRoot_, objectname );
280	object->lat = lat;
281	object->lon = lon;
282	object->alt = alt;
283	object->azimuthAngle_psi = rot_x;
284	object->pitchAngle_theta = rot_y;
285	object->bankAngle_phi = rot_z;
286	if(label!="")
287	object->addLabel("default", label);
288	if(dynamic)
289	{
290	updater = new osgVisual::object_updater(object);
291	object->addUpdater( updater );
292	}
293	object->setCameraOffset( cam_trans_x, cam_trans_y, cam_trans_z, cam_rot_x, cam_rot_y, cam_rot_z);
294	if(filename!="")
295	{
296	object->loadGeometry( filename );
297	object->setGeometryOffset( geometry_rot_x, geometry_rot_y, geometry_rot_z );
298	object->setScale( geometry_scale_x, geometry_scale_y, geometry_scale_z );
299	}
300
301	if(updater.valid())
302	{
303	updater->setUpdaterSlotNames( object, updater_lat, updater_lon, updater_alt, updater_rot_x, updater_rot_y, updater_rot_z, updater_label);
304	}
305
306	OSG_NOTIFY( osg::ALWAYS ) << "Done." << std::endl;
307	return object;
308	}
309
310	void visual_object::setNewPositionAttitude( double lat_, double lon_, double alt_, double azimuthAngle_psi_, double pitchAngle_theta_, double bankAngle_phi_ )
311	{
312	lat = lat_;
313	lon = lon_;
314	alt = alt_;
315
316	azimuthAngle_psi = azimuthAngle_psi_;
317	pitchAngle_theta = pitchAngle_theta_;
318	bankAngle_phi = bankAngle_phi_;
319	}
320
321	void visual_object::setNewPosition( double lat_, double lon_, double alt_ )
322	{
323	lat = lat_;
324	lon = lon_;
325	alt = alt_;
326	}
327
328	void visual_object::setNewAttitude( double azimuthAngle_psi_, double pitchAngle_theta_, double bankAngle_phi_ )
329	{
330	azimuthAngle_psi = azimuthAngle_psi_;
331	pitchAngle_theta = pitchAngle_theta_;
332	bankAngle_phi = bankAngle_phi_;
333	}
334
335	void visual_object::setGeometryOffset( double rotX_, double rotY_, double rotZ_ )
336	{
337	geometry_offset_rotation.makeRotate( rotX_, osg::Vec3f(1.0, 0.0, 0.0),
338	rotY_, osg::Vec3f(0.0, 1.0, 0.0),
339	rotZ_, osg::Vec3f(0.0, 0.0, 1.0) );
340	}
341
342	void visual_object::setScale( double scale_ )
343	{
344	scaleX = scale_;
345	scaleY = scale_;
346	scaleZ = scale_;
347	}
348
349	void visual_object::setScale( double scaleX_, double scaleY_, double scaleZ_ )
350	{
351	scaleX = scaleX_;
352	scaleY = scaleY_;
353	scaleZ = scaleZ_;
354	}
355
356	bool visual_object::loadGeometry(std::string filename_)
357	{
358	// Check if file exists
359	if( !osgDB::fileExists(filename_) )
360	{
361	OSG_NOTIFY(osg::FATAL) << "Error: Model not loaded. File '" << filename_ << "' does not exist." << std::endl;
362	}
363
364	osg::ref_ptr<osg::Node> tmpModel = osgDB::readNodeFile( filename_ );
365
366	if( tmpModel.valid() )
367	{
368	// remove old geometry
369	geometry->removeChildren(0, geometry->getNumChildren());
370
371	// add new geometry
372	geometry->addChild( tmpModel.get() );
373	return true;
374	}
375	else
376	{
377	std::cout <<": No model loaded: " << filename_ << std::endl;
378	return false;
379	}
380	}
381
382	bool visual_object::setGeometry(osg::Node* geometry_)
383	{
384	// remove old geometry
385	geometry->removeChildren(0, geometry->getNumChildren());
386
387	// add new geometry
388	geometry->addChild( geometry_ );
389
390	return true;
391	}
392
393	void visual_object::unsetGeometry()
394	{
395	// remove old geometry
396	geometry->removeChildren(0, geometry->getNumChildren());
397
398	// Set std OSG Node to allow tracking of an osgVisual without
399	geometry->addChild( new osg::Node() );
400	}
401
402	void visual_object::addUpdater( object_updater* updater_ )
403	{
404	if ( updater.valid() )
405	updater->addUpdater( updater_ );
406	else
407	updater = updater_;
408	}
409
410	void visual_object::clearAllUpdater()
411	{
412	// release only first updater. Because smartpointer: Will be deleted if not referenced.
413	if ( updater.valid() )
414	updater = NULL;
415	}
416
417	std::vector<object_updater*> visual_object::getUpdaterList()
418	{
419	// iterate through updater and add all pointer.
420	std::vector<object_updater*> updaterList;
421	osg::ref_ptr<object_updater> tmpUpdater = updater;
422
423	while (tmpUpdater.valid())
424	{
425	updaterList.push_back( tmpUpdater );
426	tmpUpdater = tmpUpdater->getPointer();
427	}
428
429	// return list
430	return updaterList;
431	}
432
433	void visual_object::visual_objectPositionCallback::operator()(osg::Node* node, osg::NodeVisitor* nv)
434	{
435	visual_object* object = dynamic_cast<visual_object*>(node);
436	if ( !object )
437	{
438	OSG_NOTIFY(osg::FATAL) << "ERROR : No object found. Unable to apply this callback!" << std::endl;
439	return;
440	}
441
442	// execute preUpdater to get new data of this object.
443	if ( object->updater.valid() )
444	object->updater->preUpdate(object);
445
446	// Nodepath from this node to absolute parent (if no endnode specified)
447	osg::NodePath nodePath = nv->getNodePath();
448
449	// If Nodepath != empty, then mt = last element of node path
450	osg::MatrixTransform* mt = nodePath.empty() ? 0 : dynamic_cast<osg::MatrixTransform*>(nodePath.back());
451	if (mt)
452	{
453	osg::CoordinateSystemNode* csn = 0;
454
455	// find coordinate system node from our parental chain: traverse chain and try to convert every node to a csn.
456	unsigned int i;
457	for(i=0; i<nodePath.size() && csn==0; ++i) // "&& csn" means: exit loop if csn found
458	{
459	csn = dynamic_cast<osg::CoordinateSystemNode*>(nodePath[i]); // dynamic_cast returns 0 if dynamic_cast fails.
460	}
461
462	// Wenn csn gefunden:
463	if (csn)
464	{
465	// Ellipsoidmodel erfragen
466	osg::EllipsoidModel* ellipsoid = csn->getEllipsoidModel();
467	if (ellipsoid)
468	{
469	osg::Matrix inheritedMatrix;
470
471	// durch den _restlichen_ Nodepath durchgehen und alle anfallenden Transformationen durchführen.
472	for(i+=1; i<nodePath.size()-1; ++i)
473	{
474	osg::Transform* transform = nodePath[i]->asTransform(); // Versuchen, den Node zu einer Transformation zu konvertieren
475
476	// wenn Node wirklich Trafo, dann die Tranformationsmatrix von Nodekoordinaten nach Global auf inheritedMatrix draufschlagen.
477	if (transform) transform->computeLocalToWorldMatrix(inheritedMatrix, nv);
478	}
479
480	osg::Matrixd matrix(inheritedMatrix);
481
482	// Set position
483	ellipsoid->computeLocalToWorldTransformFromLatLongHeight(object->lat, object->lon, object->alt, matrix);
484
485	// Set Upvector for position
486	double X,Y,Z;
487	util::calculateXYZAtWGS84Coordinate(object->lat, object->lon, object->alt, csn, X, Y, Z );
488	object->upVector = ellipsoid->computeLocalUpVector(X,Y,Z);
489
490	// Set scale
491	osg::Matrixd scaleMatrix;
492	scaleMatrix.makeScale( object->scaleX, object->scaleY, object->scaleZ );
493	matrix.preMult( scaleMatrix );
494
495	// Set rotation
496	// rotation von links ranmultiplizieren, entspricht: matrix = rotation * matrix. Da rotation ein Quat ist, wäre die direkte Multiplikation nur über Umwege machbar.
497	// Rotate Object to Attitude.
498	osg::Matrixd rotationMatrix;
499	// Move Model by Azimuth
500	rotationMatrix.makeRotate( -object->azimuthAngle_psi, osg::Vec3d(0.0, 0.0, 1.0) );
501	matrix.preMult(rotationMatrix);
502	// Move Model by Pitch
503	rotationMatrix.makeRotate( object->pitchAngle_theta, osg::Vec3d(1.0, 0.0, 0.0) );
504	matrix.preMult(rotationMatrix);
505	// Move Model by Bank
506	rotationMatrix.makeRotate( object->bankAngle_phi, osg::Vec3d(0.0, 1.0, 0.0) );
507	matrix.preMult(rotationMatrix);
508
509	// Also update camera matrix (without geometry offset, because camera is interested in the objects matrix, not in the model's matrix.)
510	object->cameraMatrix = matrix;
511	/** \todo : Clean up camera matrix management: try to solve it with a single matrix. (each frame two matrix mults less) */
512	// dont know, why this rotation is necessary - maybe manipulator and node MatrixTransform interpret a matrix in different way?
513	object->cameraMatrix.preMult( object->cameraTranslationOffset );
514	object->cameraMatrix.preMult( object->cameraRotationOffset );
515
516
517	// Set geometry correction
518	matrix.preMultRotate( object->geometry_offset_rotation );
519
520	// Set cumulated object matrix as the matrix of this matrix transform
521	mt->setMatrix(matrix);
522	}
523	}
524	}
525
526	// Call any nested callbacks.
527	traverse(node,nv);
528
529	// If SLAVE: execute postUpdater to pass new data of this object to dataIO.
530	if( visual_dataIO::getInstance()->isSlave() )
531	{
532	if ( object->updater.valid() )
533	object->updater->postUpdate(object);
534	}
535
536	} // Callbackfunction [ Operater() ] END
537
538	void visual_object::setCameraOffsetTranslation( double x_, double y_, double z_)
539	{
540	cameraTranslationOffset.makeTranslate( osg::Vec3d(x_, y_, z_) ); // Trans: (rechts davon, longitudinal, vertikal)
541	}
542
543	void visual_object::setCameraOffset(double x_, double y_, double z_, double rotX_, double rotY_, double rotZ_)
544	{
545	setCameraOffsetTranslation( x_, y_, z_);
546	setCameraOffsetRotation( rotX_, rotY_, rotZ_);
547	}
548
549	void visual_object::setCameraOffsetRotation(double rotX_, double rotY_, double rotZ_)
550	{
551	osg::Matrix tmp;
552	cameraRotationOffset.makeRotate( osg::DegreesToRadians( 90.0 ), osg::Vec3(1, 0, 0) );
553	tmp.makeRotate( -rotZ_, osg::Vec3d(0.0, 1.0, 0.0) );
554	cameraRotationOffset.preMult(tmp);
555	tmp.makeRotate( rotY_, osg::Vec3d(1.0, 0.0, 0.0) );
556	cameraRotationOffset.preMult(tmp);
557	tmp.makeRotate( -rotX_, osg::Vec3d(0.0, 0.0, 1.0) );
558	cameraRotationOffset.preMult(tmp);
559	}
560
561	void visual_object::clearLabels()
562	{
563	labels->removeDrawables(0, labels->getNumDrawables());
564	}
565
566	void visual_object::addLabel(std::string idString_, std::string label_, osg::Vec4 color_, osg::Vec3 offset_)
567	{
568	osg::ref_ptr<osgText::Text> text = new osgText::Text();
569
570	text->setName(idString_);
571	text->setText(label_);
572	text->setColor(color_);
573	text->setFont("fonts/arial.ttf");
574	text->setCharacterSizeMode(osgText::Text::OBJECT_COORDS_WITH_MAXIMUM_SCREEN_SIZE_CAPPED_BY_FONT_HEIGHT);
575	text->setAutoRotateToScreen(true);
576	text->setPosition(offset_);
577
578	text->getOrCreateStateSet()->setMode(GL_DEPTH_TEST,osg::StateAttribute::OFF);
579	labels->addDrawable( text );
580	}
581
582	bool visual_object::removeLabel(std::string idString_)
583	{
584	osg::Node* labelToRemove = util::findNamedNode(idString_, this);
585
586	if(labelToRemove)
587	{
588	removeChild( labelToRemove );
589	return true;
590	}
591	else
592	return false;
593	}
594
595	bool visual_object::updateLabelText(std::string idString_, std::string label_)
596	{
597	osg::Node* labelToUpdate = util::findNamedNode(idString_, this);
598
599	if(labelToUpdate)
600	{
601	osgText::Text* text = dynamic_cast<osgText::Text*>(labelToUpdate);
602	if(text)
603	{
604	text->setText(label_);
605	return true;
606	}
607	return false;
608	}
609	return false;
610	}
611
612	osgText::Text* visual_object::getLabel(std::string idString_)
613	{
614	osg::Node* labelToFind = util::findNamedNode(idString_, this);
615
616	if(labelToFind)
617	{
618	osgText::Text* text = dynamic_cast<osgText::Text*>(labelToFind);
619	if(text)
620	return text;
621	}
622	return NULL;
623
624	}
625
626	bool visual_object::setDrawLabelAsOverlay(std::string idString_, bool drawAsOverlay)
627	{
628	osg::Node* labelToFind = util::findNamedNode(idString_, this);
629
630	if(labelToFind)
631	{
632	if (drawAsOverlay)
633	labelToFind->getOrCreateStateSet()->setMode(GL_DEPTH_TEST,osg::StateAttribute::OFF);
634	else
635	labelToFind->getOrCreateStateSet()->setMode(GL_DEPTH_TEST,osg::StateAttribute::ON);
636	return true;
637	}
638	else
639	return false;
640	}
641
642	bool visual_object::getDrawLabelAsOverlay(std::string idString_)
643	{
644	osg::Node* labelToFind = util::findNamedNode(idString_, this);
645
646	if(labelToFind)
647	{
648	if(labelToFind->getOrCreateStateSet()->getMode(GL_DEPTH_TEST) == osg::StateAttribute::OFF)
649	return false;
650	else
651	return true;
652	}
653	return false;
654	}

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