2.小球转动 AddTorque();方法

private int que;//旋转方向

pulic float force=10f;//旋转角度

void Update(){
if(Input.GetKey(KeyCode.Q)){

que=-1;

}

else if(Input.GetKey(KeyCode.E)){
que=1;

}

else{

que=0;

}

}

void ForceUpdate(){

if(!stop){

Ball_Rigidbody.AddForce(direction*force,ForceMode.Force);

Ball_Rigidbody.Torque(vector3.up.*que*force;

}

else{

Ball_Rigidbody.velocity=vector3.Lerp(Ball_Rigidbody.velocity,new vector3(0,Ball_Rigidbody.velocity.y,0),20;

}

//摄像机跟踪 方法一

private Transform Tan_Camera;

public Transform    Tan_ball;

public vector3 dir;

void Start(){
Tan_Camera=this.Transform;//获取组件

Tan_ball=GameObject.GetComponent<Transform>();//获取组件

dir=new vector3(0,3,-5);

}

//摄像机的跟踪

void ForceUpdate(){
Tan_Camera.position=Tan_ball.position+dir;

Tan_Camera.LookAt(Tan_Ball);

}

//摄像机跟踪方法二 脚本挂于小球上

private Tansform Camera;

private Tansform Ball;

public vector3 dir;

void Start(){

Camera=GameObject.GetComponent<Transform>();

Ball=this.transform;

dir= Mathf.Abs(Camera.position-Ball.position);

}

void ForceUpdate(){
Camera.position=Ball.position+dir;

Camera.LookAt(gameObject);

}