Initial commit

scenes/characters/Enemy.gd

@@ -0,0 +1,135 @@
+extends CharacterBody2D
+
+class_name Enemy
+
+"""
+This implements a very rudimentary state machine. There are better implementations
+in the AssetLib if you want to make something more complex. Also it shares code with Enemy.gd
+and probably both should extend some parent script
+"""
+
+@export var WALK_SPEED: int = 350
+@export var ROLL_SPEED: int = 1000
+@export var hitpoints: int = 3
+
+var despawn_fx = preload("res://scenes/misc/DespawnFX.tscn")
+
+var linear_vel = Vector2()
+@export var facing = "down" # (String, "up", "down", "left", "right")
+
+var anim = ""
+var new_anim = ""
+
+enum { STATE_IDLE, STATE_WALKING, STATE_ATTACK, STATE_ROLL, STATE_DIE, STATE_HURT }
+
+var state = STATE_IDLE
+
+func _ready():
+	randomize()
+
+func _physics_process(_delta):
+	
+	match state:
+		STATE_IDLE:
+			new_anim = "idle_" + facing
+		STATE_WALKING:
+			set_velocity(linear_vel)
+			move_and_slide()
+			linear_vel = velocity
+			
+			var target_speed = Vector2()
+			
+			if facing == "down":
+				target_speed += Vector2.DOWN
+			if facing == "left":
+				target_speed += Vector2.LEFT
+			if facing == "right":
+				target_speed += Vector2.RIGHT
+			if facing == "up":
+				target_speed += Vector2.UP
+			
+			target_speed *= WALK_SPEED
+			linear_vel = linear_vel.lerp(target_speed, 0.9)
+			
+			new_anim = ""
+			if abs(linear_vel.x) > abs(linear_vel.y):
+				if linear_vel.x < 0:
+					facing = "left"
+				if linear_vel.x > 0:
+					facing = "right"
+			if abs(linear_vel.y) > abs(linear_vel.x):
+				if linear_vel.y < 0:
+					facing = "up"
+				if linear_vel.y > 0:
+					facing = "down"
+			
+			if linear_vel != Vector2.ZERO:
+				new_anim = "walk_" + facing
+			else:
+				state = STATE_IDLE
+			pass
+		STATE_ATTACK:
+			new_anim = "slash_" + facing
+			pass
+		STATE_ROLL:
+			set_velocity(linear_vel)
+			move_and_slide()
+			linear_vel = velocity
+			var target_speed = Vector2()
+			if facing == "up":
+				target_speed.y = -1
+			if facing == "down":
+				target_speed.y = 1
+			if facing == "left":
+				target_speed.x = -1
+			if facing == "right":
+				target_speed.x = 1
+			target_speed *= ROLL_SPEED
+			linear_vel = linear_vel.lerp(target_speed, 0.9)
+			new_anim = "roll"
+			pass
+		STATE_DIE:
+			new_anim = "die"
+		STATE_HURT:
+			new_anim = "hurt"
+	
+
+
+	if new_anim != anim:
+		anim = new_anim
+		$anims.play(anim)
+	pass
+
+
+func goto_idle():
+	state = STATE_IDLE
+
+func _on_state_changer_timeout():
+	$state_changer.wait_time = randf_range(1.0, 5.0)
+	#state = randi() %3
+	state = STATE_ATTACK
+	facing = ["left", "right", "up", "down"][randi()%3]
+	pass # Replace with function body.
+
+
+func _on_hurtbox_area_entered(area):
+	if state != STATE_DIE and area.name == "player_sword":
+		hitpoints -= 1
+		var pushback_direction = (global_position - area.global_position).normalized()
+		set_velocity(pushback_direction * 5000)
+		move_and_slide()
+		state = STATE_HURT
+		$state_changer.start()
+		if hitpoints <= 0:
+			$state_changer.stop()
+			state = STATE_DIE
+	pass # Replace with function body.
+
+func despawn():
+	var despawn_particles = despawn_fx.instantiate()
+	get_parent().add_child(despawn_particles)
+	despawn_particles.global_position = global_position
+	if has_node("item_spawner"):
+		get_node("item_spawner").spawn()
+	queue_free()
+	pass