Angular 角速度

GetComponent<RigidBody>().angularVelocity = Random.insideUntSphere * tumble

rigidbody component中的angular drag是角速度的空氣阻力

Instantiate

Instantiate(gameObject,transform.position,transform.rotation)在游戲里生成一個(gè)gameObject，后兩個(gè)參數(shù)是將要賦值給gameObject的transform和rotation
gameObject可以有自己的script，比如Start()函數(shù)里設(shè)置velocity從而給它一個(gè)初始速度。

Collider

Collider勾選isTrigger代表碰撞作為一個(gè)trigger。
相關(guān)函數(shù)示例：

void OnTriggerEnter(Collider other)
{ 
Destory(other.gameObject);
}
void OnTirggerExit(Collider other)
{
Destory(other.gameObject);
}

子彈發(fā)射的冷卻時(shí)間設(shè)置

public float fireRate;
private float nextTime;
private void Update()
{
if(Input.GetButton("Fire1")&&Time.time>nextTime)
{
nextFire = Time.time+fireRate;
Instantiate(Shot,ShotSpawn.position,ShotSpawn.rotation);
}
}