public GameObject[] obj;//观察对象集合
private int num=0;
//  public Transform target;
public float distance = 3.0f;//摄像机正对物体的距离
public float height = 1.0f;//摄像机正对物体的高度
public float damping = 5.0f;//摄像机位移速度
private bool smppthRotation = true;//是否平滑转动角度
public float rotationDamping = 10.0f;//摄像机角度转动的速度
public float x_=0f;//摄像机距离物体x轴的距离
private Vector3 targetLookAtOffset;//
public float bumperDistanceCheck = 2.5f;
public float bumperCameraHeight = 1.0f;
private Vector3 bumperRayOffset;
// Update is called once per frame
void Update () {
lookatobj(obj[num].transform);
}
void lookatobj(Transform target)
{
Vector3 wantedPosition = target.TransformPoint(x_, height, -distance);
RaycastHit hit;
//若摄像机和物体之间有障碍物 则将摄像机拉到障碍物之前
//Vector3 back = target.transform.TransformDirection(-1 * Vector3.forward);
//if (Physics.Raycast(target.TransformPoint(bumperRayOffset), back, out hit, bumperDistanceCheck))
//{
//    // clamp wanted position to hit position
//    wantedPosition.x = hit.point.x;
//    wantedPosition.z = hit.point.z;
//  //  wantedPosition.y = Mathf.Lerp(wantedPosition.y, hit.point.y + bumperCameraHeight,  Time.deltaTime * damping);
//}
transform.position = Vector3.Lerp(transform.position, wantedPosition, Time.deltaTime * damping);//摄像机位移
Vector3 lookPosition = target.position;//target.TransformPoint(targetLookAtOffset);
Quaternion wantedRotation = Quaternion.LookRotation(lookPosition - transform.position, target.up);
if (smppthRotation)
{
//平滑转动摄像机
transform.rotation = Quaternion.Slerp(transform.rotation, wantedRotation, Time.deltaTime * rotationDamping);
}
else transform.rotation = wantedRotation;
//将障碍物隐藏
if (Vector3.Distance(transform.position, wantedPosition) <=2f)
{
Vector3 dir=transform.TransformDirection(Vector3.forward);
if (Physics.Raycast(transform.position, dir, out hit))
{
if (hit.collider.gameObject.name != target.name)
{
hit.collider.gameObject.SetActive(false);
}
}
}
if (transform.position == wantedPosition && transform.rotation == wantedRotation)//循环观察
{
num++;
num %= obj.Length;
obj[num].SetActive(true);//显示对象
}
}