注意继承的是ScriptableObject类，创建的资源类型是.asset。

using UnityEngine;

[CreateAssetMenu(menuName = "MotionType/Screw")]
public class MotionScrew : ScriptableObject
{
	public Transform trPut;
	public Transform trStart;
	public Transform trOriginal;
	public float speed = 10.0f;
}