class_name Spikeball extends Area3D

const BASE_SPIN_SPEED := 120.0
const NORMAL_POWER := 600.0

@export var power: float = NORMAL_POWER

@onready var mesh := $'Mesh' as MeshInstance3D

func _ready() -> void:
	body_entered.connect(propel)
	mesh.set_instance_shader_parameter(&'hue_shift', power - NORMAL_POWER)

func propel(body: PhysicsBody3D) -> void:
	if body is Runner:
		(body as Runner).knockback(global_position, power)

func _process(delta: float) -> void:
	global_rotation_degrees += (
		Vector3.UP*BASE_SPIN_SPEED*power*delta/NORMAL_POWER
	)