add modeltree:get_model(index)

src/objects/Entities.hpp

@@ -69,7 +69,8 @@ class LineBatch;
 class ModelBatch;
 class Frustum;
 class Entities;
-namespace riggining {
+
+namespace rigging {
     struct Rig;
     class RigConfig;
 }
@@ -112,6 +113,8 @@ public:
         return registry.get<Scripting>(entity);
     }
 
+    rigging::Rig& getModeltree() const;
+
     entityid_t getUID() const {
         return registry.get<EntityId>(entity).uid;
     }