//实例化组件
private Rigidbody rigi;
public float speed = 5.0f;
void Start()
{
//获取组件
rigi = gameobject.GetComponent<Rigidbody>();
}
void Update()
{
if(Input.GetKey(KeyCode.W))
{
//刚体移动方法        物体当前位置       方向+距离 
rigi.MovePosition(transform.position+Vector3.forward*Time.deltaTime*speed);
}
if(Input.GetKey(KeyCode.S))
{
rigi.MovePosition(transform.position+Vector3.back*Time.deltaTime*speed);
}
if(Input.GetKey(KeyCode.A))
{
rigi.MovePosition(transform.position+Vector3.left*Time.deltaTime*speed);
}
if(Input.GetKey(KeyCode.D))
{
rigi.MovePosition(transform.position+Vector3.right*Time.deltaTime*speed);
}
}