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))
37 _models->addChangeListener(_listener);
40 FGModelMgr::~FGModelMgr ()
42 _models->removeChangeListener(_listener);
45 for (unsigned int i = 0; i < _instances.size(); i++) {
46 globals->get_scenery()->get_scene_graph()
47 ->removeKid(_instances[i]->model->getSceneGraph());
55 vector<SGPropertyNode_ptr> model_nodes = _models->getChildren("model");
57 for (unsigned int i = 0; i < model_nodes.size(); i++) {
59 add_model(model_nodes[i]);
60 } catch (const sg_throwable& t) {
61 SG_LOG(SG_GENERAL, SG_ALERT, t.getFormattedMessage() << t.getOrigin());
67 FGModelMgr::add_model (SGPropertyNode * node)
69 SG_LOG(SG_GENERAL, SG_INFO,
70 "Adding model " << node->getStringValue("name", "[unnamed]"));
71 Instance * instance = new Instance;
72 SGModelPlacement *model = new SGModelPlacement;
73 instance->model = model;
74 instance->node = node;
75 SGModelLib *model_lib = globals->get_model_lib();
76 ssgBranch *object = (ssgBranch *)model_lib->load_model(
77 globals->get_fg_root(),
78 node->getStringValue("path",
79 "Models/Geometry/glider.ac"),
81 globals->get_sim_time_sec(), /*cache_object=*/false);
83 model->init( object );
84 shadows->addOccluder((ssgBranch *)object, SGShadowVolume::occluderTypeTileObject);
86 // Set position and orientation either
87 // indirectly through property refs
88 // or directly with static values.
89 SGPropertyNode * child = node->getChild("longitude-deg-prop");
91 instance->lon_deg_node = fgGetNode(child->getStringValue(), true);
93 model->setLongitudeDeg(node->getDoubleValue("longitude-deg"));
95 child = node->getChild("latitude-deg-prop");
97 instance->lat_deg_node = fgGetNode(child->getStringValue(), true);
99 model->setLatitudeDeg(node->getDoubleValue("latitude-deg"));
101 child = node->getChild("elevation-ft-prop");
103 instance->elev_ft_node = fgGetNode(child->getStringValue(), true);
105 model->setElevationFt(node->getDoubleValue("elevation-ft"));
107 child = node->getChild("roll-deg-prop");
109 instance->roll_deg_node = fgGetNode(child->getStringValue(), true);
111 model->setRollDeg(node->getDoubleValue("roll-deg"));
113 child = node->getChild("pitch-deg-prop");
115 instance->pitch_deg_node = fgGetNode(child->getStringValue(), true);
117 model->setPitchDeg(node->getDoubleValue("pitch-deg"));
119 child = node->getChild("heading-deg-prop");
121 instance->heading_deg_node = fgGetNode(child->getStringValue(), true);
123 model->setHeadingDeg(node->getDoubleValue("heading-deg"));
125 // Add this model to the global scene graph
126 globals->get_scenery()->get_scene_graph()->addKid(model->getSceneGraph());
128 // Register that one at the scenery manager
129 globals->get_scenery()->register_placement_transform(model->getTransform());
132 // Save this instance for updating
133 add_instance(instance);
142 FGModelMgr::unbind ()
147 FGModelMgr::update (double dt)
149 for (unsigned int i = 0; i < _instances.size(); i++) {
150 Instance * instance = _instances[i];
151 SGModelPlacement * model = instance->model;
153 // Optionally set position from properties
154 if (instance->lon_deg_node != 0)
155 model->setLongitudeDeg(instance->lon_deg_node->getDoubleValue());
156 if (instance->lat_deg_node != 0)
157 model->setLatitudeDeg(instance->lat_deg_node->getDoubleValue());
158 if (instance->elev_ft_node != 0)
159 model->setElevationFt(instance->elev_ft_node->getDoubleValue());
161 // Optionally set orientation from properties
162 if (instance->roll_deg_node != 0)
163 model->setRollDeg(instance->roll_deg_node->getDoubleValue());
164 if (instance->pitch_deg_node != 0)
165 model->setPitchDeg(instance->pitch_deg_node->getDoubleValue());
166 if (instance->heading_deg_node != 0)
167 model->setHeadingDeg(instance->heading_deg_node->getDoubleValue());
169 instance->model->update();
174 FGModelMgr::add_instance (Instance * instance)
176 _instances.push_back(instance);
180 FGModelMgr::remove_instance (Instance * instance)
182 vector<Instance *>::iterator it;
183 for (it = _instances.begin(); it != _instances.end(); it++) {
184 if (*it == instance) {
185 _instances.erase(it);
195 // ssgSetNearFar(_nearplane, _farplane);
196 // ssgCullAndDraw(_scene);
201 ////////////////////////////////////////////////////////////////////////
202 // Implementation of FGModelMgr::Instance
203 ////////////////////////////////////////////////////////////////////////
205 FGModelMgr::Instance::Instance ()
217 FGModelMgr::Instance::~Instance ()
219 // Unregister that one at the scenery manager
220 globals->get_scenery()->unregister_placement_transform(model->getTransform());
227 ////////////////////////////////////////////////////////////////////////
228 // Implementation of FGModelMgr::Listener
229 ////////////////////////////////////////////////////////////////////////
232 FGModelMgr::Listener::childAdded(SGPropertyNode * parent, SGPropertyNode * child)
234 if (strcmp(parent->getName(), "model") || strcmp(child->getName(), "load"))
238 _mgr->add_model(parent);
239 } catch (const sg_throwable& t) {
240 SG_LOG(SG_GENERAL, SG_ALERT, t.getFormattedMessage() << t.getOrigin());
245 FGModelMgr::Listener::childRemoved(SGPropertyNode * parent, SGPropertyNode * child)
247 if (strcmp(parent->getName(), "models") || strcmp(child->getName(), "model"))
250 // search instance by node and remove it from scenegraph
251 vector<Instance *>::iterator it = _mgr->_instances.begin();
252 vector<Instance *>::iterator end = _mgr->_instances.end();
254 for (; it != end; ++it) {
255 Instance *instance = *it;
256 if (instance->node != child)
259 _mgr->_instances.erase(it);
260 ssgBranch *branch = (ssgBranch *)instance->model->getSceneGraph();
261 shadows->deleteOccluder(branch);
262 globals->get_scenery()->get_scene_graph()->removeKid(branch);
269 // end of modelmgr.cxx