如何使用（調用）函數（AS3）中的變量？

Question

我正在嘗試對在地圖中移動的帶有Array的角色（perso）進行編程。 我的變量“ t”調用了我的“ Tuiles” MovieClip，並在我的“地圖”數組上創建了一個網格（網格），每個網格塊均帶有“ 1”。 首先，我使用一個貼圖Child修復了碰撞功能，因此，我創建了“地圖”和“網格”功能。 我需要“ t”變量來創建世界和角色碰撞。 如果將變量放在函數“ creeDecor”上，則Flash會很好地生成該變量，但說沖突函數不存在變量“ t”。 如果將“ t”變量作為通用變量放在代碼之上，則Flash會在舞台的右下角生成一個圖塊，並且碰撞函數運行良好...

我如何將它們混合兩次？ 可能嗎 ？

我讓你我的整個代碼。 如果您希望它起作用，則只需創建一個MovieClip類名“ Tuiles”（正方形：32 * 32）和另一個MC“ Perso”。

//Creation of perso

var perso:Perso = new Perso();

var grille:MovieClip = new MovieClip();

var t:Tuiles = new Tuiles();

var T:int = 32;



var map:Array = [

                 [1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1],

                 [1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1],

                 [1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1],

                 [1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1],

                 [1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1],

                 [1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1],

                 [1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1],

                 [1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1],

                 [1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1],

                 [1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1],

                 [1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1],

                 [1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1],

                 [1,8,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1],

                 [1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1],

                 [1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1],

                 ]



// temporary stockage

var stock:Array = [

                 [0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],

                 [0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],

                 [0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],

                 [0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],

                 [0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],

                 [0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],

                 [0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],

                 [0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],

                 [0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],

                 [0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],

                 [0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],

                 [0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],

                 [0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],

                 [0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],

                 [0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]

                 ]



creeDecor()                                                                        

initHero();




stage.addEventListener(KeyboardEvent.KEY_DOWN, clavierDown);

stage.addEventListener(KeyboardEvent.KEY_UP, clavierUp);

stage.addEventListener(Event.ENTER_FRAME, animation);



// Stage collision

var minX = 0;

var minY = 0;

var maxX = stage.stageWidth - perso.width;

var maxY = stage.stageHeight - perso.height;

var speedHero = 5;



function clavierDown(e)

{

    switch(e.keyCode)

    {  

        case 37:

            perso.speedX = -speedHero;

            break;

        case 39:

            perso.speedX = speedHero;

            break;

        case 38:

            perso.speedY = -speedHero;

            break;

        case 40:

            perso.speedY = speedHero;

            break;

}

}



function clavierUp(e)

{

    switch(e.keyCode)

    {

        case 37:

            perso.speedX = 0;

            break; 



        case 39:

            perso.speedX = 0;

            break;



        case 38:

            perso.speedY = 0;

            break;



            case 40:

            perso.speedY = 0;

            break;

    }

}



function animation(e)

{

    animeHero();

}

   // Stage border collision function

function animeHero()

{       

       if(perso.x + perso.speedX >= minX && perso.x + perso.speedX <= maxX)

   {

       perso.x += perso.speedX;

   } else if (perso.speedX < 0)

   {

       perso.x -= Math.abs(perso.x-minX);

               //trace(Math.abs(perso.x-minX));

   } else {

       perso.x += Math.abs(perso.x-maxX) ;

   }



   if(perso.y + perso.speedY >= minY && perso.y + perso.speedY <= maxY)

   {

       perso.y += perso.speedY;

   }

  collision();

}



function initHero()

{

    perso.speedX = 0;

    perso.speedY = 0;



    perso.x = 200;

    perso.y = 300;


    addChild(perso);

}



function collision() {



    if (perso.hitTestObject(t))

    {

        if (perso.x >= t.x + t.width - speedHero && perso.x <= t.x +t.width + 2)

        {

            perso.x = t.x + t.width;

        }



        if (perso.x + perso.width >= t.x - 2 && perso.x + perso.width <= t.x + speedHero)

        {

            perso.x = t.x - perso.width;

        }

        if (perso.y >= t.y + t.height - speedHero && perso.y <= t.y +t.height + 2)

        {

            perso.y = t.y + t.height;

        }



        if (perso.y + perso.height >= t.y - 2 && perso.y + perso.height <= t.y + speedHero)

        {

            perso.y = t.y - perso.height;

        }

    }

}



// level creation

function creeDecor():void{

    for (var i:int=0; i<20; i++){                                // boucle sur les 20 colonnes

        for (var j:int=0; j<15; j++){                            // boucle sur les 15 lignes de chaque colonne

            var f:int = map[j][i] 



            if(f>0)  {     
                t.x= i*T;  

                t.y= j*T;  

                t.gotoAndStop(f)             

                grille.addChild(t)         


                // Specialisation

                if (f==1)

                stock[j][i] = t;

            }



            else

            {

                stock[j][i] = []                               

            }

        }

    }

}

addChild(grille)    

Answer 1

您想制作許多不同的Tuiles ，並檢查與其中每一個的碰撞。 聽起來您最初是在creeDecor()中制作新的Tuiles ，但是除非您在其中存儲新的圖塊，否則只有creeDecor()知道它們。 （這就是為什么Flash說t在collision()不存在的原因。） 關於函數作用域的頁面以及該文檔的其余部分，如果您尚未閱讀，可能會有所幫助。

因此，您可以在頂層准備所有Tuiles的列表，例如：

var tList:Vector.<Tuiles> = new Vector.<Tuiles>();

這意味着creeDecor()和collision()都可以看到tList 。 然后像以前一樣，在每次需要時在creeDecor()創建新的Tuiles ，並將其添加到列表中 ：

if(f>0)  {
    var newT:Tuiles = new Tuiles();
    tList.push(newT);
    // Set up newT's position etc...

然后，你可以運行你的命中測試每Tuiles在tList使用“為每個...在”

for each (var t:Tuiles in tList) {
    if (perso.hitTestObject(t))
        // Your collision code...
    }
}

如果您只有簡單的正方形，則可能比使用hitTestObject多次hitTestObject更快的碰撞檢測方法，因此如果速度較慢，則進行下一步調整可能是一個不錯的選擇。