add blightwing's behavior

godot/characters/enemies/blightwing/Blightwing.gd

@@ -1,27 +1,82 @@
 extends KinematicBody2D
 
 
-# Declare member variables here. Examples:
-# var a: int = 2
-# var b: String = "text"
+signal player_touched
+
+
+export var direction = -1
+export var speed = 50
+export var follow_path = false
+var target: Vector2 = Vector2(0, 0)
+var target_id = 0
+var start_position = Vector2()
 
 
-# Called when the node enters the scene tree for the first time.
 func _ready() -> void:
-	pass # Replace with function body.
+	start_position = position
+	if follow_path:
+		if $Path.get_child_count() == 0:
+			follow_path = false
+		else:
+			target = $Path.get_child(0).position
+	if direction == 1:
+		$AnimatedSprite.flip_h = true
 
 
-# Called every frame. 'delta' is the elapsed time since the previous frame.
 func _physics_process(delta: float) -> void:
-	var velocity = Vector2()
-	velocity.x += 1 * 50
-	#velocity.y -= 1 * 50
-	velocity = move_and_slide(velocity, Vector2(0, 0), true, 2)
-	for i in get_slide_count():
-		var collision = get_slide_collision(i)
-		#if collision.collider.name == "Player":
-		#	print("Blightwing: " + String(OS.get_unix_time()) + " " + collision.collider.name)
+	if $LeftWallChecker.is_colliding():
+		wall_checker_collided($LeftWallChecker)
+	elif $RightWallChecker.is_colliding():
+		wall_checker_collided($RightWallChecker)
+
+	if not follow_path:
+		var target_position = position
+		target_position.x *= 2 * direction
+		position = position.move_toward(target_position, round(speed * delta))
+
+		var velocity = get_velocity_towards_target(delta)
+		var collision = move_and_collide(velocity, true, true, true)
+		if collision and collision.collider.name != "Player":
+			var _collision = move_and_collide(velocity)
+	else:
+		var velocity = get_velocity_towards_target(delta)
+
+		var collision = move_and_collide(velocity, true, true, true)
+		if collision and collision.collider.name != "Player":
+			var _collision = move_and_collide(velocity)
+		else:
+			position = position.move_toward(start_position + target, round(speed * delta))
+
+		if position == start_position + target:
+			if $Path.get_child_count() - 1 == target_id:
+				target_id = -1
+				target = $Path.position
+			else:
+				target_id += 1
+				target = $Path.get_child(target_id).position
+
+			if start_position.x + target.x > position.x:
+				$AnimatedSprite.flip_h = true
+			elif start_position.x + target.x < position.x:
+				$AnimatedSprite.flip_h = false
 
 
-func _on_Area2D_body_entered(body: Node) -> void:
-	print(body.name)
+func get_velocity_towards_target(delta: float) -> Vector2:
+	var velocity = Vector2(0, 0)
+	if start_position.x + target.x > position.x:
+		velocity.x = speed * delta
+	elif start_position.x + target.x < position.x:
+		velocity.x = -speed * delta
+
+	if start_position.y + target.y > position.y:
+		velocity.y = speed * delta
+	elif start_position.y + target.y < position.y:
+		velocity.y = -speed * delta
+	return velocity
+
+
+func wall_checker_collided(wall_checker: RayCast2D) -> void:
+	if wall_checker.get_collider().name == "Player":
+		emit_signal("player_touched")
+	direction *= -1
+	$AnimatedSprite.flip_h = not $AnimatedSprite.flip_h

godot/characters/enemies/blightwing/Blightwing.tscn

@@ -1,6 +1,7 @@
-[gd_scene load_steps=7 format=2]
+[gd_scene load_steps=8 format=2]
 
 [ext_resource path="res://assets/characters/characters.png" type="Texture" id=1]
+[ext_resource path="res://characters/enemies/blightwing/Blightwing.gd" type="Script" id=2]
 
 [sub_resource type="AtlasTexture" id=1]
 atlas = ExtResource( 1 )
@@ -23,18 +24,32 @@ animations = [ {
 } ]
 
 [sub_resource type="RectangleShape2D" id=5]
-extents = Vector2( 5, 5 )
+extents = Vector2( 4.5, 5 )
 
-[node name="Blightwing" type="KinematicBody2D" groups=["enemy"]]
+[node name="Blightwing" type="KinematicBody2D" groups=["enemy", "rideable"]]
 collision_layer = 8
 collision_mask = 11
+script = ExtResource( 2 )
 
 [node name="AnimatedSprite" type="AnimatedSprite" parent="."]
 frames = SubResource( 4 )
 animation = "fly"
+frame = 3
 playing = true
 
 [node name="CollisionShape2D" type="CollisionShape2D" parent="."]
-position = Vector2( 3.47893e-06, 0.999998 )
+position = Vector2( 1.66894e-06, 1.5 )
 rotation = 1.5708
 shape = SubResource( 5 )
+
+[node name="LeftWallChecker" type="RayCast2D" parent="."]
+rotation = 1.5708
+enabled = true
+cast_to = Vector2( 0, 10 )
+collision_mask = 11
+
+[node name="RightWallChecker" type="RayCast2D" parent="."]
+rotation = -1.5708
+enabled = true
+cast_to = Vector2( 0, 10 )
+collision_mask = 11