Question

我正在开发Unity上的二维游戏。但是我收到了一些错误。我不知道如何解决这些问题。我是新手，并从一些链接获取参考。也许我正在创建检查站，产生点，死亡区，这就是为什么会出错。

PlayerRespawn.js -

var Player : GameObject;
var spawnPoint: Transform;

function OnTriggerEnter(other : Collider) {
Destroy(other.gameObject);
var P: GameObject = Instantiate(Player,spawnPoint.position,Quaternion.identity);
var sf=Camera.main.GetComponent(SmoothFollow);
sf.target=P.transform;
}

SmoothFollow.js -

var target : Transform;
// The distance in the x-z plane to the target
var distance = 10.0;
// the height we want the camera to be above the target
var height = 5.0;
// How much we 
var heightDamping = 2.0;
var rotationDamping = 3.0;

// Place the script in the Camera-Control group in the component menu
@script AddComponentMenu("Camera-Control/Smooth Follow")


function LateUpdate () {
    // Early out if we don't have a target
    if (!target)
        return;

    // Calculate the current rotation angles
    var wantedRotationAngle = target.eulerAngles.y;
    var wantedHeight = target.position.y + height;

    var currentRotationAngle = transform.eulerAngles.y;
    var currentHeight = transform.position.y;

    // Damp the rotation around the y-axis
    currentRotationAngle = Mathf.LerpAngle (currentRotationAngle, wantedRotationAngle, rotationDamping * Time.deltaTime);

    // Damp the height
    currentHeight = Mathf.Lerp (currentHeight, wantedHeight, heightDamping * Time.deltaTime);

    // Convert the angle into a rotation
    var currentRotation = Quaternion.Euler (0, currentRotationAngle, 0);

    // Set the position of the camera on the x-z plane to:
    // distance meters behind the target
    transform.position = target.position;
    transform.position -= currentRotation * Vector3.forward * distance;

    // Set the height of the camera
    transform.position.y = currentHeight;

    // Always look at the target
    transform.LookAt (target);
}

我得到的错误是 -

NullReferenceException
PlayerRespawn.OnTriggerEnter (UnityEngine.Collider other) (at Assets/scripts/PlayerRespawn.js:8)

Answer 1

在这一行：

var sf = Camera.main.GetComponent（SmoothFollow）;

检查SmoothFollow组件是否已添加到主摄像头。问题可能是在此语句之后，var sf为null。

如何解决这些错误

1 个答案: