diff --git a/gamecore/modules/world/actors/actor2D.lua b/gamecore/modules/world/actors/actor2D.lua
index 2f16d3a..ed20ae8 100644
--- a/gamecore/modules/world/actors/actor2D.lua
+++ b/gamecore/modules/world/actors/actor2D.lua
@@ -36,32 +36,9 @@ function Actor2D:new(world, type, x, y, w, h, isSolid)
   self:register()
 end
 
-function Actor2D:initPhysics()
-  self:initMovement()
-  self:setBounceFactor()
-  self:initGravity()
-
-  self:setFilter()
-end
-
-function Actor2D:setBounceFactor(newBounceFactor)
-  self.bounceFactor = newBounceFactor or 0
-end
-
 -- MOVEMENT FUNCTIONS
 -- Basic functions from the movement.
 
-function Actor2D:setFilter()
-  -- Init the bump filter
-  self.filter = function(item, other)
-    if (other.isSolid) then
-      return "slide"
-    else
-      return "cross"
-    end
-  end
-end
-
 function Actor2D:initMovement()
   self.xsp    = 0
   self.ysp    = 0
diff --git a/gamecore/modules/world/actors/baseactor.lua b/gamecore/modules/world/actors/baseactor.lua
index a513ed7..d6e2b2e 100644
--- a/gamecore/modules/world/actors/baseactor.lua
+++ b/gamecore/modules/world/actors/baseactor.lua
@@ -66,6 +66,41 @@ function BaseActor:destroy()
   self.isDestroyed = true
 end
 
+-- PHYSICS INITIALISATION
+-- Basic initialization of the physic systems
+
+function BaseActor:initPhysics()
+  self:initMovement()
+  self:initGravity()
+
+  self:setBounceFactor()
+  self:setFilter()
+end
+
+function BaseActor:setBounceFactor(newBounceFactor)
+  self.bounceFactor = newBounceFactor or 0
+end
+
+function BaseActor:setFilter()
+  -- Init the bump filter
+  self.filter = function(item, other)
+    if (other.isSolid) then
+      return "slide"
+    else
+      return "cross"
+    end
+  end
+end
+
+function BaseActor:initMovement( )
+  -- Empty placeholder function
+end
+
+function BaseActor:initGravity( )
+  -- Empty placeholder function
+end
+
+
 -- UPDATE FUNCTIONS
 -- Theses functions are activated every steps