actor_self_collide

diff -r f7d9beae4a9c gazebo/physics/Actor.cc
--- a/gazebo/physics/Actor.cc	Fri Apr 01 09:37:55 2016 -0700
+++ b/gazebo/physics/Actor.cc	Fri Apr 01 12:25:23 2016 -0700
@@ -818,6 +818,17 @@
       this->skinScale, this->skinScale));
 }
 
+/////////////////////////////////////////////////
+void Actor::SetSelfCollide(bool /*_self_collide*/)
+{
+}
+
+/////////////////////////////////////////////////
+bool Actor::GetSelfCollide() const
+{
+  return false;
+}
+
 //////////////////////////////////////////////////
 TrajectoryInfo::TrajectoryInfo()
   : id(0), type(""), duration(0.0), startTime(0.0), endTime(0.0),
diff -r f7d9beae4a9c gazebo/physics/Actor.hh
--- a/gazebo/physics/Actor.hh	Fri Apr 01 09:37:55 2016 -0700
+++ b/gazebo/physics/Actor.hh	Fri Apr 01 12:25:23 2016 -0700
@@ -131,6 +131,12 @@
       /// \brief Reset custom trajectory of the actor.
       public: void ResetCustomTrajectory();
 
+      // Documentation inherited.
+      public: virtual bool GetSelfCollide() const;
+
+      // Documentation inherited.
+      public: virtual void SetSelfCollide(bool _self_collide);
+
       /// \brief Add inertia for a sphere.
       /// \param[in] _linkSdf The link to add the inertia to.
       /// \param[in] _pose Pose of the inertia.
diff -r f7d9beae4a9c gazebo/physics/Model.hh
--- a/gazebo/physics/Model.hh	Fri Apr 01 09:37:55 2016 -0700
+++ b/gazebo/physics/Model.hh	Fri Apr 01 12:25:23 2016 -0700
@@ -202,12 +202,12 @@
       /// Bodies connected by a joint are exempt from this, and will
       /// never collide.
       /// \return True if self-collide enabled for this model, false otherwise.
-      public: bool GetSelfCollide() const;
+      public: virtual bool GetSelfCollide() const;
 
       /// \brief Set this model's self_collide property
       /// \sa GetSelfCollide
       /// \param[in] _self_collide True if self-collisions enabled by default.
-      public: void SetSelfCollide(bool _self_collide);
+      public: virtual void SetSelfCollide(bool _self_collide);
 
       /// \brief Set the gravity mode of the model.
       /// \param[in] _value False to turn gravity on for the model.