Question

我有一个脚本可以在方向上移动角色取决于它碰撞的内容。继承我的代码：

var speed : float = 1;
private var leftBool : boolean;
private var rightBool : boolean;
private var upBool : boolean;
private var downBool : boolean;

function Update () {
    if(leftBool == true) {
        gameObject.GetComponent(Rigidbody2D).velocity.x =         gameObject.GetComponent(Rigidbody2D).velocity.x - speed * Time.deltaTime;
        rightBool = false;
        upBool = false;
        downBool = false;
    }
    if(upBool == true) {
        gameObject.GetComponent(Rigidbody2D).velocity.y = gameObject.GetComponent(Rigidbody2D).velocity.y + speed * Time.deltaTime;
        rightBool = false;
        leftBool = false;
        downBool = false;
    }
    if(rightBool == true) {
        gameObject.GetComponent(Rigidbody2D).velocity.x = gameObject.GetComponent(Rigidbody2D).velocity.x + speed * Time.deltaTime;
        rightBool = false;
        leftBool = false;
        downBool = false;
    }
    if(downBool == true) {
        gameObject.GetComponent(Rigidbody2D).velocity.y = gameObject.GetComponent(Rigidbody2D).velocity.y - speed * Time.deltaTime;
        rightBool = false;
        leftBool = false;
        upBool = false;
    }   
}

function Start () {
    leftBool = true;
}


function OnTriggerEnter2D (other : Collider2D) {
    if(other.GetComponent(Arrows).rotationNumber == 1) {
        leftBool = true;
        Debug.Log("Entered");
    }
    if(other.GetComponent(Arrows).rotationNumber == 2) {
        upBool = true;
        Debug.Log("Entered");
    }
    if(other.GetComponent(Arrows).rotationNumber == 3) {
        rightBool = true;
        Debug.Log("Entered");
    }
    if(other.GetComponent(Arrows).rotationNumber == 4) {
        downBool = true;
        Debug.Log("Entered");
    }
}

它显示＆＃34;输入＆＃34;在debug.log中但角色在碰撞时没有改变方向。为什么会这样？感谢。

Answer 1

首先当与rotationNumber == 1发生碰撞时，leftBool保持为true。根据声明和Update（）中的代码，其他错误。现在，当你与rotationNumber == 2发生碰撞时，upBool返回true。但是如前所述，leftBool在Update（）中仍然是正确的，并且它位于代码执行顺序的顶部，upBool将立即返回false。所以，你永远不会得到if（upBool == true）{}的东西（顺便说一下，你不必使用==运算符来表示bools，if（upBool）表示true，if（！upBool）表示false ）。希望它能消除你的困惑。现在，有很多方法可以达到你想要的效果。但是，我在这里修改了你的代码，以便你可以理解发生了什么 -

var speed : float = 1;
private var leftBool : boolean;
private var rightBool : boolean;
private var upBool : boolean;
private var downBool : boolean;

function Start () {
    leftBool = true;
}

function Update () {
    if(leftBool) {
        gameObject.GetComponent(Rigidbody2D).velocity.x = gameObject.GetComponent(Rigidbody2D).velocity.x - speed * Time.deltaTime; 
    }
    if(upBool) {
        gameObject.GetComponent(Rigidbody2D).velocity.y = gameObject.GetComponent(Rigidbody2D).velocity.y + speed * Time.deltaTime;   
    }
    if(rightBool) {
        gameObject.GetComponent(Rigidbody2D).velocity.x = gameObject.GetComponent(Rigidbody2D).velocity.x + speed * Time.deltaTime;
    }
    if(downBool) {
        gameObject.GetComponent(Rigidbody2D).velocity.y = gameObject.GetComponent(Rigidbody2D).velocity.y - speed * Time.deltaTime;
    }   
}

function OnTriggerEnter2D (other : Collider2D) {
    if(other.GetComponent(Arrows).rotationNumber == 1) {
        leftBool = true;
        rightBool = false;
        upBool = false;
        downBool = false;
        Debug.Log("Entered");
    }
    if(other.GetComponent(Arrows).rotationNumber == 2) {
        upBool = true;
        rightBool = false;
        leftBool = false;
        downBool = false;
        Debug.Log("Entered");
    }
    if(other.GetComponent(Arrows).rotationNumber == 3) {
        rightBool = true;
        upBool = false;
        leftBool = false;
        downBool = false;
        Debug.Log("Entered");
    }
    if(other.GetComponent(Arrows).rotationNumber == 4) {
        downBool = true;
        rightBool = false;
        leftBool = false;
        upBool = false;
        Debug.Log("Entered");
    }
}

希望它会有所帮助。

字符移动代码不工作 - Unity3D unityscript

1 个答案: