C# 试图在unity3d中将游戏对象保持在屏幕左右边界内

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正交摄像头的2D游戏，我的问题是游戏对象一直在屏幕外，我是不是遗漏了什么？

首先，你的函数从来没有被调用过，因为它的名字有拼写错误。它应该是更新的，而不是更新的

其次，坐标的问题是代码混合了屏幕坐标和世界坐标。屏幕坐标从0，0到Screen.width，Screen.height。可以使用WorldToScreenPoint将坐标从世界坐标更改为屏幕坐标，然后使用ScreenToWorldPoint将坐标更改为屏幕坐标，其中Z值是转换点与摄影机的距离

下面是一个完整的代码示例，可在更改播放器位置后使用，以确保其位于屏幕区域内：

    Vector2 playerPosScreen = Camera.main.WorldToScreenPoint(transform.position);
    if (playerPosScreen.x > Screen.width)
    {
        transform.position = 
            Camera.main.ScreenToWorldPoint(
                new Vector3(Screen.width, 
                            playerPosScreen.y, 
                            transform.position.z - Camera.main.transform.position.z));
    }
    else if (playerPosScreen.x < 0.0f)
    {
        transform.position = 
            Camera.main.ScreenToWorldPoint(
                new Vector3(0.0f, 
                            playerPosScreen.y, 
                            transform.position.z - Camera.main.transform.position.z));
    }

---

首先，你的函数永远不会被调用，因为它的名字有拼写错误。它应该是更新的，而不是更新的

其次，坐标的问题是代码混合了屏幕坐标和世界坐标。屏幕坐标从0，0到Screen.width，Screen.height。可以使用WorldToScreenPoint将坐标从世界坐标更改为屏幕坐标，然后使用ScreenToWorldPoint将坐标更改为屏幕坐标，其中Z值是转换点与摄影机的距离

下面是一个完整的代码示例，可在更改播放器位置后使用，以确保其位于屏幕区域内：

    Vector2 playerPosScreen = Camera.main.WorldToScreenPoint(transform.position);
    if (playerPosScreen.x > Screen.width)
    {
        transform.position = 
            Camera.main.ScreenToWorldPoint(
                new Vector3(Screen.width, 
                            playerPosScreen.y, 
                            transform.position.z - Camera.main.transform.position.z));
    }
    else if (playerPosScreen.x < 0.0f)
    {
        transform.position = 
            Camera.main.ScreenToWorldPoint(
                new Vector3(0.0f, 
                            playerPosScreen.y, 
                            transform.position.z - Camera.main.transform.position.z));
    }

---

经过一些研究，我发现一个解决方案非常适合我：

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;
    }
}

---

经过一些研究，我发现一个解决方案非常适合我：

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;
    }
}

---

我为输入错误感到抱歉，这只是一个输入错误，感谢您提供有关说明和代码的提示。我将测试它：没问题。至少对我来说，这段代码适用于正字法和透视相机。我很抱歉键入错误更新，这只是一个键入错误，感谢您提供有关说明和代码的提示。我将测试它：没问题。至少对我来说，这段代码对正交和透视相机都有效。