class_name SimpleLinearBehavior
extends BulletBehavior
## Makes bullets move in [member Bullet.direction], potentially accelerating.


## Initial speed of the bullet when it is spawned.
@export_custom(0, "suffix:px/s") var initial_speed: float = 0.0

## Rate at which the bullet will speed up.
@export_custom(0, "suffix:px/s²") var acceleration: float = 0.0


func process_bullet(bullet: Bullet, delta: float) -> void:
	var speed = initial_speed + acceleration * bullet.time_elapsed
	bullet.position += bullet.direction * speed * delta