Все еще воюю с физикой

tank.py

@@ -46,6 +46,13 @@ class Tank():
     Tank.ls.append(self)
   def get_sprite(self):
     return self.sp_body[0]
+  def get_sprite_list(self):
+    sp = arcade.SpriteList()
+    for sprite in self.sp_body:
+      sp.append(sprite)
+    for sprite in self.sp_gun:
+      sp.append(sprite)
+    return sp
   def gun_to_xy(self,x,y):
     for gun in self.sp_gun:
       gun.angle = math.atan2(x-gun.center_x,y-gun.center_y) * 180 / math.pi
@@ -56,8 +63,11 @@ class Tank():
       if dx != 0 or dy != 0:
         body.angle = math.atan2(dx,dy) * 180 / math.pi
     for gun in self.sp_gun:
-      gun.change_x = self.sp_body[0].change_x
-      gun.change_y = self.sp_body[0].change_y
+      gun.change_x = dx*self.speed
+      gun.change_y = dy*self.speed
+  def move_engine(self,engine,dx,dy):
+    for sprite in self.sp_body:#,*self.sp_gun]:
+      engine.apply_force(sprite,(dx*self.speed,dy*self.speed))
   def shoot(self):
     for gun in self.sp_gun:
       Bullet(