c# - 试图在 unity3d 中将游戏对象保持在屏幕左右边界内

Question

我的游戏对象有以下代码:

private float screenx;
Vector3 playerPosScreen;
 void Start () {
 screenx=Camera.main.pixelWidth-renderer.bounds.size.x ;
 }

 void update(){
  playerPosScreen = Camera.main.WorldToScreenPoint(transform.position);
  if (playerPosScreen.x >= screenx) {
        //playerPosScreen.x=screenx;
        transform.position=new Vector3 (screenx, transform.position.y,transform.position.z);
    }
    //txt.text = playerPosScreen.x.ToString();
    else if(playerPosScreen.x<=renderer.bounds.size.x){
        transform.position=new Vector3 (renderer.bounds.size.x, transform.position.y,transform.position.z);
    }
 }

我正在开发一个带有orthographic 相机的2D 游戏，我的问题是游戏对象一直在屏幕外，我是不是漏掉了什么？

Answer 1

经过一些研究，我发现了一个解决方案希望对我来说效果很好:

Vector3 playerPosScreen;
Vector3 wrld;
float half_szX;
float half_szY;
void Start () {
    wrld = Camera.main.ScreenToWorldPoint(new Vector3(Screen.width, 0.0f, 0.0f));
    half_szX = renderer.bounds.size.x / 2;
    half_szY = renderer.bounds.size.y /2 ;
}
void Update () {
    playerPosScreen = transform.position;
 if (playerPosScreen.x >=(wrld.x-half_szX) ) {
        playerPosScreen.x=wrld.x-half_szX;
        transform.position=playerPosScreen;
    }
    if(playerPosScreen.x<=-(wrld.x-half_szX)){
        playerPosScreen.x=-(wrld.x-half_szX);
        transform.position=playerPosScreen;
    }
}