+
+// Little helper class that holds an extra reference to a
+// loaded 3d model.
+// Since we clone all structural nodes from our 3d models,
+// the database pager will only see one single reference to
+// top node of the model and expire it relatively fast.
+// We attach that extra reference to every model cloned from
+// a base model in the pager. When that cloned model is deleted
+// this extra reference is deleted too. So if there are no
+// cloned models left the model will expire.
+namespace {
+class SGDatabaseReference : public osg::Observer
+{
+public:
+ SGDatabaseReference(osg::Referenced* referenced) :
+ mReferenced(referenced)
+ { }
+ virtual void objectDeleted(void*)
+ {
+ mReferenced = 0;
+ }
+private:
+ osg::ref_ptr<osg::Referenced> mReferenced;
+};
+
+void makeEffectAnimations(PropertyList& animation_nodes,
+ PropertyList& effect_nodes)
+{
+ for (PropertyList::iterator itr = animation_nodes.begin();
+ itr != animation_nodes.end();
+ ++itr) {
+ SGPropertyNode_ptr effectProp;
+ SGPropertyNode* animProp = itr->ptr();
+ SGPropertyNode* typeProp = animProp->getChild("type");
+ if (!typeProp)
+ continue;
+ const char* typeString = typeProp->getStringValue();
+ if (!strcmp(typeString, "material")) {
+ effectProp
+ = SGMaterialAnimation::makeEffectProperties(animProp);
+ } else if (!strcmp(typeString, "shader")) {
+
+ SGPropertyNode* shaderProp = animProp->getChild("shader");
+ if (!shaderProp || strcmp(shaderProp->getStringValue(), "chrome"))
+ continue;
+ *itr = 0; // effect replaces animation
+ SGPropertyNode* textureProp = animProp->getChild("texture");
+ if (!textureProp)
+ continue;
+ effectProp = new SGPropertyNode();
+ makeChild(effectProp.ptr(), "inherits-from")
+ ->setValue("Effects/chrome");
+ SGPropertyNode* paramsProp = makeChild(effectProp.get(), "parameters");
+ makeChild(paramsProp, "chrome-texture")
+ ->setValue(textureProp->getStringValue());
+ }
+ if (effectProp.valid()) {
+ PropertyList objectNameNodes = animProp->getChildren("object-name");
+ for (PropertyList::iterator objItr = objectNameNodes.begin(),
+ end = objectNameNodes.end();
+ objItr != end;
+ ++objItr)
+ effectProp->addChild("object-name")
+ ->setStringValue((*objItr)->getStringValue());
+ effect_nodes.push_back(effectProp);
+
+ }
+ }
+ animation_nodes.erase(remove_if(animation_nodes.begin(),
+ animation_nodes.end(),
+ !boost::bind(&SGPropertyNode_ptr::valid,
+ _1)),
+ animation_nodes.end());
+}
+}
+
+static osg::Node *
+sgLoad3DModel_internal(const SGPath& path,
+ const osgDB::Options* dbOptions,