public void CreateMainPoint()
{
GameObject ball = Instantiate(this.ball, this.transform);
ball.name = "Ball";
if (trajectory != null)
{
trajectory.AddMainPoint(ball);
}
else
{
trajectory = new Trajectory(ball);
}
TextMesh text = ball.GetComponentInChildren <TextMesh>();
text.text = (trajectory.NumMainPoint()).ToString();
}