void Start()
{
rend = this.gameObject.AddComponent <LineRenderer>();
rend.positionCount = arcLength;
rend.material = lineMaterial;
rend.textureMode = LineTextureMode.Tile;
rend.startWidth = startWidth;
rend.endWidth = endWidth;
slingShooter = pullPoint.GetComponent <SlingShooter>();
projectileSpeed = slingShooter.projectileSpeed;
slingShooter.onPullReset.AddListener(OnPullReturn);
}