Player gun, bullet and its collisiions. Refactor.

metroidvania/Scenes/Enemies/WalkingEnemy.gd

@@ -0,0 +1,32 @@
+extends "res://Scenes/Enemies/Enemy.gd"
+
+enum DIRECTION {LEFT = -1, RIGHT = 1}
+
+export (DIRECTION) var WALKING_DIRECTION = DIRECTION.RIGHT
+
+var state
+
+onready var sprite = $Sprite
+onready var floor_left = $FloorLeft
+onready var floor_right = $FloorRight
+onready var wall_right = $WallRight
+onready var wall_left = $WallLeft
+
+func _ready():
+	motion.y = 8
+	state = WALKING_DIRECTION
+	
+func _physics_process(_delta):
+	match state:
+		DIRECTION.RIGHT:
+			motion.x = MAX_SPEED
+			if not floor_right.is_colliding() or wall_right.is_colliding():
+				state = DIRECTION.LEFT
+
+		DIRECTION.LEFT:
+			motion.x = -MAX_SPEED
+			if not floor_left.is_colliding() or wall_left.is_colliding():
+				state = DIRECTION.RIGHT
+	
+	sprite.scale.x = sign(motion.x)
+	motion = move_and_slide_with_snap(motion, Vector2.DOWN * 4, Vector2.UP, true, 4, deg2rad(46))