Все еще воюю с физикой

main.py

@@ -16,7 +16,9 @@ class MainView(arcade.View):
     
     self.map = Map(SCREEN_WIDTH,SCREEN_HEIGHT,64,64)
     self.player = list(filter(lambda tank: tank.type=='player', Tank.ls))[0]
-    self.physics_engine = arcade.PhysicsEngineSimple(self.player.get_sprite(),Map.block_list)
+    self.physics_engine = arcade.PymunkPhysicsEngine(gravity=(0, 0),damping=0.01)
+    self.physics_engine.add_sprite(self.player.get_sprite(), friction=0.5, mass=1.0)
+    #self.physics_engine.add_sprite_list(Map.block_list, friction=0.5, collision_type="wall")
 
   def on_draw(self):
     self.clear()
@@ -26,7 +28,7 @@ class MainView(arcade.View):
     Bullet.draw()
 
   def on_update(self,time_delta):
-    self.physics_engine.update()
+    self.physics_engine.step()
     Tank.update()
     Bonus.update_list(time_delta)
     Bullet.update_list()
@@ -37,7 +39,8 @@ class MainView(arcade.View):
   def on_key_press(self,key,mod):
     if key == arcade.key.A:
       self.last_key = key
-      self.player.move(-1,0)
+      #self.player.move(-1,0)
+      self.player.move_engine(self.physics_engine,-1,0)
     elif key == arcade.key.D:
       self.last_key = key
       self.player.move(1,0)

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(