Implement basic enemy movement.

Enemy.gd

@@ -1,26 +1,45 @@
 extends Node2D
 
+var speed = 50
 var type = "Enemy"
 
-func choose_move_target(player_pos):
+var mv_delta = 0
+
+func choose_move_offset(player_pos):
 	var state = get_parent().get_state()
-	var target = null
-	var pos = global_position
-	var delta_x = player_pos[0] - pos[0]
-	var delta_y = player_pos[1] - pos[1]
-	if delta_x > delta_y:
+	var mv_offset = null
+	var my_pos = get_pos()
+	var delta_x = player_pos.x - my_pos.x
+	var delta_y = player_pos.y - my_pos.y
+	if abs(delta_x) > abs(delta_y):
 		if delta_x > 0:
-			target = Vector2(pos[0] + 1, pos[1])
+			mv_offset = Vector2(1, 0)
 		else:
-			target = Vector2(pos[0] - 1, pos[1])
+			mv_offset = Vector2(-1, 0)
 	else:
 		if delta_y > 0:
-			target = Vector2(pos[0], pos[1] + 1)
+			mv_offset = Vector2(0, 1)
 		else:
-			target = Vector2(pos[0], pos[1] - 1)
+			mv_offset = Vector2(0, -1)
 
-	if state.is_open(target):
-		return target
+	var mv_target = my_pos + mv_offset
+	if state.get_type(mv_target) == "Empty":
+		return mv_offset
 	else:
 		# TODO follow a wall.
-		pass
+		pass
+		
+func _physics_process(delta):
+	mv_delta += delta
+	if mv_delta >= 1:
+		mv_delta = 0
+		var state = get_parent().get_state()
+		var player_pos = state.player_pos
+		var mv_offset = choose_move_offset(player_pos)
+		if not mv_offset == null:
+			self.translate(mv_offset * Vector2(speed, speed))
+		
+func get_pos():
+	var pos = self.global_position
+	pos = Vector2(pos.x/50, pos.y/50)
+	return pos

Enemy.tscn

@@ -11,4 +11,3 @@ margin_right = 40.0
 margin_bottom = 40.0
 texture = ExtResource( 2 )
 expand = true
-