1 // modelmgr.cxx - manage a collection of 3D models.
2 // Written by David Megginson, started 2002.
4 // This file is in the Public Domain, and comes with no warranty.
10 #include <simgear/compiler.h>
16 #include <simgear/scene/model/placement.hxx>
17 #include <simgear/scene/model/modellib.hxx>
18 #include <simgear/scene/model/shadowvolume.hxx>
19 #include <simgear/structure/exception.hxx>
21 #include <Main/fg_props.hxx>
22 #include <Scenery/scenery.hxx>
25 #include "modelmgr.hxx"
29 extern SGShadowVolume *shadows;
32 FGModelMgr::FGModelMgr ()
33 : _models(fgGetNode("/models", true)),
34 _listener(new Listener(this))
36 _models->addChangeListener(_listener);
39 FGModelMgr::~FGModelMgr ()
41 _models->removeChangeListener(_listener);
44 for (unsigned int i = 0; i < _instances.size(); i++) {
45 globals->get_scenery()->get_scene_graph()
46 ->removeKid(_instances[i]->model->getSceneGraph());
54 vector<SGPropertyNode_ptr> model_nodes = _models->getChildren("model");
56 for (unsigned int i = 0; i < model_nodes.size(); i++) {
58 add_model(model_nodes[i]);
59 } catch (const sg_throwable& t) {
60 SG_LOG(SG_GENERAL, SG_ALERT, t.getFormattedMessage() << t.getOrigin());
66 FGModelMgr::add_model (SGPropertyNode * node)
68 SG_LOG(SG_GENERAL, SG_INFO,
69 "Adding model " << node->getStringValue("name", "[unnamed]"));
70 Instance * instance = new Instance;
71 SGModelPlacement *model = new SGModelPlacement;
72 instance->model = model;
73 instance->node = node;
74 SGModelLib *model_lib = globals->get_model_lib();
75 ssgBranch *object = (ssgBranch *)model_lib->load_model(
76 globals->get_fg_root(),
77 node->getStringValue("path",
78 "Models/Geometry/glider.ac"),
80 globals->get_sim_time_sec(), /*cache_object=*/false);
82 model->init( object );
84 // Set position and orientation either
85 // indirectly through property refs
86 // or directly with static values.
87 SGPropertyNode * child = node->getChild("longitude-deg-prop");
89 instance->lon_deg_node = fgGetNode(child->getStringValue(), true);
91 model->setLongitudeDeg(node->getDoubleValue("longitude-deg"));
93 child = node->getChild("latitude-deg-prop");
95 instance->lat_deg_node = fgGetNode(child->getStringValue(), true);
97 model->setLatitudeDeg(node->getDoubleValue("latitude-deg"));
99 child = node->getChild("elevation-ft-prop");
101 instance->elev_ft_node = fgGetNode(child->getStringValue(), true);
103 model->setElevationFt(node->getDoubleValue("elevation-ft"));
105 child = node->getChild("roll-deg-prop");
107 instance->roll_deg_node = fgGetNode(child->getStringValue(), true);
109 model->setRollDeg(node->getDoubleValue("roll-deg"));
111 child = node->getChild("pitch-deg-prop");
113 instance->pitch_deg_node = fgGetNode(child->getStringValue(), true);
115 model->setPitchDeg(node->getDoubleValue("pitch-deg"));
117 child = node->getChild("heading-deg-prop");
119 instance->heading_deg_node = fgGetNode(child->getStringValue(), true);
121 model->setHeadingDeg(node->getDoubleValue("heading-deg"));
123 // Add this model to the global scene graph
124 globals->get_scenery()->get_scene_graph()->addKid(model->getSceneGraph());
126 // Register that one at the scenery manager
127 globals->get_scenery()->register_placement_transform(model->getTransform());
130 // Save this instance for updating
131 add_instance(instance);
140 FGModelMgr::unbind ()
145 FGModelMgr::update (double dt)
147 for (unsigned int i = 0; i < _instances.size(); i++) {
148 Instance * instance = _instances[i];
149 SGModelPlacement * model = instance->model;
151 // Optionally set position from properties
152 if (instance->lon_deg_node != 0)
153 model->setLongitudeDeg(instance->lon_deg_node->getDoubleValue());
154 if (instance->lat_deg_node != 0)
155 model->setLatitudeDeg(instance->lat_deg_node->getDoubleValue());
156 if (instance->elev_ft_node != 0)
157 model->setElevationFt(instance->elev_ft_node->getDoubleValue());
159 // Optionally set orientation from properties
160 if (instance->roll_deg_node != 0)
161 model->setRollDeg(instance->roll_deg_node->getDoubleValue());
162 if (instance->pitch_deg_node != 0)
163 model->setPitchDeg(instance->pitch_deg_node->getDoubleValue());
164 if (instance->heading_deg_node != 0)
165 model->setHeadingDeg(instance->heading_deg_node->getDoubleValue());
167 instance->model->update();
169 if (shadows && !instance->shadow) {
170 ssgBranch *branch = (ssgBranch *)instance->model->getSceneGraph();
171 shadows->addOccluder(branch, SGShadowVolume::occluderTypeTileObject);
172 instance->shadow = true;
178 FGModelMgr::add_instance (Instance * instance)
180 _instances.push_back(instance);
184 FGModelMgr::remove_instance (Instance * instance)
186 vector<Instance *>::iterator it;
187 for (it = _instances.begin(); it != _instances.end(); it++) {
188 if (*it == instance) {
189 _instances.erase(it);
199 // ssgSetNearFar(_nearplane, _farplane);
200 // ssgCullAndDraw(_scene);
205 ////////////////////////////////////////////////////////////////////////
206 // Implementation of FGModelMgr::Instance
207 ////////////////////////////////////////////////////////////////////////
209 FGModelMgr::Instance::Instance ()
222 FGModelMgr::Instance::~Instance ()
224 // Unregister that one at the scenery manager
225 globals->get_scenery()->unregister_placement_transform(model->getTransform());
232 ////////////////////////////////////////////////////////////////////////
233 // Implementation of FGModelMgr::Listener
234 ////////////////////////////////////////////////////////////////////////
237 FGModelMgr::Listener::childAdded(SGPropertyNode * parent, SGPropertyNode * child)
239 if (strcmp(parent->getName(), "model") || strcmp(child->getName(), "load"))
243 _mgr->add_model(parent);
244 } catch (const sg_throwable& t) {
245 SG_LOG(SG_GENERAL, SG_ALERT, t.getFormattedMessage() << t.getOrigin());
250 FGModelMgr::Listener::childRemoved(SGPropertyNode * parent, SGPropertyNode * child)
252 if (strcmp(parent->getName(), "models") || strcmp(child->getName(), "model"))
255 // search instance by node and remove it from scenegraph
256 vector<Instance *>::iterator it = _mgr->_instances.begin();
257 vector<Instance *>::iterator end = _mgr->_instances.end();
259 for (; it != end; ++it) {
260 Instance *instance = *it;
261 if (instance->node != child)
264 _mgr->_instances.erase(it);
265 ssgBranch *branch = (ssgBranch *)instance->model->getSceneGraph();
266 if (shadows && instance->shadow)
267 shadows->deleteOccluder(branch);
268 globals->get_scenery()->get_scene_graph()->removeKid(branch);
275 // end of modelmgr.cxx