smarter slimes

scripts/slime.gd

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+class_name Slime extends Area2D
+@onready var enemy_graphic: AnimatedSprite2D = $EnemyGraphic
+@onready var right_cast: RayCast2D = $RightCast
+@onready var right_down_cast: RayCast2D = $RightDownCast
+@onready var left_down_cast: RayCast2D = $LeftDownCast
+@onready var left_cast: RayCast2D = $LeftCast
+
+signal enemyAttackSignal(body, enemy)
+
+var speed = 100
+enum FaceDirection {RIGHT,LEFT}
+var facing:FaceDirection = FaceDirection.RIGHT
+var direction = 0
+
+enum EnemyStates {RUN, ATTACK, SPAWN}
+var currentEnemyState:EnemyStates = EnemyStates.SPAWN
+
+# Called when the node enters the scene tree for the first time.
+func _ready() -> void:
+	pass # Replace with function body.
+
+
+# Called every frame. 'delta' is the elapsed time since the previous frame.
+func _process(delta: float) -> void:
+	handleMovement(delta)
+	handleStates()
+	handleAnimation()
+	handleCollisions()
+	
+func _on_body_entered(body: Node2D) -> void:
+	if body is Player:
+		print("Attack the player")
+		currentEnemyState = EnemyStates.ATTACK
+		direction = 0
+		enemyAttackSignal.emit(body, self)
+
+func handleMovement(delta)->void:
+	position.x += direction*speed*delta
+	match facing:
+		FaceDirection.LEFT:
+			enemy_graphic.flip_h = true
+		FaceDirection.RIGHT:
+			enemy_graphic.flip_h = false
+	
+func handleStates()->void:
+	match currentEnemyState:
+		EnemyStates.SPAWN when not direction ==0 :
+			print("setting state to run")
+			currentEnemyState = EnemyStates.RUN
+			
+			
+func handleAnimation()->void:
+	match currentEnemyState:
+		EnemyStates.SPAWN:
+			enemy_graphic.play("spawn")
+		EnemyStates.RUN:
+			enemy_graphic.play("idle")
+		EnemyStates.ATTACK:
+			enemy_graphic.play("attack")
+			
+func handleCollisions()->void:
+	if not right_down_cast.is_colliding():
+		direction =-1
+		facing = FaceDirection.LEFT
+	if not left_down_cast.is_colliding():
+		direction = 1
+		facing = FaceDirection.RIGHT	
+	if right_cast.is_colliding() && not right_cast.get_collider() is Player:
+		direction = -1
+		facing=FaceDirection.LEFT
+	if left_cast.is_colliding() && not left_cast.get_collider() is Player:
+		direction = 1
+		facing=FaceDirection.RIGHT
+
+func _on_animation_finished() -> void:
+	match currentEnemyState:
+		EnemyStates.SPAWN:
+			currentEnemyState = EnemyStates.RUN
+			direction = 1
+		EnemyStates.ATTACK:
+			currentEnemyState = EnemyStates.RUN
+			direction = (randi() % 2) * 2 - 1

scripts/slime.gd.uid

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+uid://c83er3jdb7i8d