Question

我有一个场景，我的相机没有跟随我的播放器。当玩家到达相机的末端时，我希望玩家不能再往前走（在相机视图之外）。我怎么能这样做？

我的行动守则

public class PlayerBlueController : MonoBehaviour {

public float speed;
private float x;



// Use this for initialization
void Start () {


}

// Update is called once per frame
void FixedUpdate () {

    x = Input.GetAxis ("Horizontal") / 100 * speed;
    transform.Translate (x,0,0);

}
}

从中可以看出这一点。它离开了相机的视野。

Answer 1

我注意到你使用了Collider2D。 您应该使用Rigidbody2D.MovePosition代替transform.Translate ，否则在使用transform.Translate时您可能会遇到问题。

1 。使用Camera.main.WorldToViewportPoint

获取最终移动位置并将其转换为ViewPortPoint中的新位置

2 。对＃1 中的结果应用Mathf.Clamp限制。

3 。使用Camera.main.ViewportToWorldPoint将ViewPortPoint转换回世界点。

4 。最后，将其移至Rigidbody2D.MovePosition。

以下代码从this回复修改为包含限制到屏幕边界。

不使用Rigidbody移动：

仅在不需要碰撞和物理时使用：

public float speed = 100;
public Transform obj;

public void Update()
{
    float h = Input.GetAxis("Horizontal");
    float v = Input.GetAxis("Vertical");

    //Move only if we actually pressed something
    if ((h > 0 || v > 0) || (h < 0 || v < 0))
    {
        Vector3 tempVect = new Vector3(h, v, 0);
        tempVect = tempVect.normalized * speed * Time.deltaTime;


        Vector3 newPos = obj.transform.position + tempVect;
        checkBoundary(newPos);
    }
}

void checkBoundary(Vector3 newPos)
{
    //Convert to camera view point
    Vector3 camViewPoint = Camera.main.WorldToViewportPoint(newPos);

    //Apply limit
    camViewPoint.x = Mathf.Clamp(camViewPoint.x, 0.04f, 0.96f);
    camViewPoint.y = Mathf.Clamp(camViewPoint.y, 0.07f, 0.93f);

    //Convert to world point then apply result to the target object
    obj.position = Camera.main.ViewportToWorldPoint(camViewPoint);
}

使用Rigidbody2D 移动对象：

如果需要碰撞和物理，请使用：

public float speed = 100;
public Rigidbody2D rb;

public void Update()
{
    float h = Input.GetAxis("Horizontal");
    float v = Input.GetAxis("Vertical");

    //Move only if we actually pressed something
    if ((h > 0 || v > 0) || (h < 0 || v < 0))
    {
        Vector3 tempVect = new Vector3(h, v, 0);
        tempVect = tempVect.normalized * speed * Time.deltaTime;

        //rb.MovePosition(rb.transform.position + tempVect);

        Vector3 newPos = rb.transform.position + tempVect;
        checkBoundary(newPos);
    }
}

void checkBoundary(Vector3 newPos)
{
    //Convert to camera view point
    Vector3 camViewPoint = Camera.main.WorldToViewportPoint(newPos);

    //Apply limit
    camViewPoint.x = Mathf.Clamp(camViewPoint.x, 0.04f, 0.96f);
    camViewPoint.y = Mathf.Clamp(camViewPoint.y, 0.07f, 0.93f);

    //Convert to world point then apply result to the target object
    Vector3 finalPos = Camera.main.ViewportToWorldPoint(camViewPoint);
    rb.MovePosition(finalPos);
}

Answer 2

图片无响应。但你可以查看球员位置

x = Input.GetAxis ("Horizontal") / 100 * speed;
if(gameobject.transform.x > someValue)
    x=0

gameobject将在您附加类的场景中为OBJECT。

另一种方法是将2个空游戏对象放置在对撞机上作为invisibleWall并将对手送到玩家

Answer 3

可能的解决方案是：

1.获取屏幕角的坐标（左上角，右上角，左下角，右下角）。您可以使用Screen.height and Screen.width获取此坐标。

2.使用Camera.ScreenToWorldPoint所需的相机转换此坐标。

3.获取你的玩家坐标并检查它们是否在由4个坐标的屏幕角落形成的矩形内。

Answer 4

您需要根据相机的边缘限制变换的位置。 Here is an answer describing the different coordinate systems in unity

你可能希望做这样的事情：

float xMin = Camera.main.ViewportToWorldPoint(Vector3.zero).x;
float xMax = Camera.main.ViewportToWorldPoint(Vector3.one).x;

Vector3 currentPos = transform.position;
float dx = Input.GetAxis ("Horizontal") / 100 * speed;
Vector3 desiredPos = new Vector3(currentPos.x + dx, currentPos.y, currentPos.z);

Vector3 realPos = desiredPos;

if(desiredPos.x > xMax)
    realPos.x = xMax;
else if(desiredPos.x < xMin)
    realPos.x = xMin;

transform.position = realPos;

Read up here for more info on ViewportToWorldPoint(), it's extremely useful to become comfortable with the different coordinate spaces and how you can convert between them.

如何在摄像机视图边界内移动2D对象

4 个答案: