编码错误 - Adob​​e Flash

Question

无法弄清楚我的代码有什么问题。请帮忙。

错误：

场景1，层 '操作'，帧3，线120 1180：调用可能未定义的方法rad2deg。 场景1，图层'操作'，帧3，行121 1180：调用一个可能未定义的方法rad2deg。 场景1，图层'操作'，帧3，行129 1180：调用可能未定义的方法rad2deg。

代码：

import flash.utils.Timer; 
import flash.events.TimerEvent; 

var upPressed:Boolean = false; 
var downPressed:Boolean = false; 
var leftPressed:Boolean = false; 
var rightPressed:Boolean = false; 
var missile:Array = new Array(); 
var timer: Timer = new Timer(1000); 
timer.addEventListener(TimerEvent.TIMER, addMissile); 
timer.start(); 

plane.addEventListener(Event.ENTER_FRAME, fl_MoveInDirectionOfKey_2); 
stage.addEventListener(KeyboardEvent.KEY_DOWN, fl_SetKeyPressed_2); 
stage.addEventListener(KeyboardEvent.KEY_UP, fl_UnsetKeyPressed_2); 
stage.addEventListener(Event.ENTER_FRAME, moveObjects); 

function fl_MoveInDirectionOfKey_2(event:Event) 
{ 
    if (upPressed) 
    { 
     plane.y -= 8; 
    } 
    if (downPressed) 
    { 
     plane.y += 8; 
    } 
    if (leftPressed) 
    { 
     plane.x -= 8; 
    } 
    if (rightPressed) 
    { 
     plane.x += 8; 
    } 
} 

function fl_SetKeyPressed_2(event:KeyboardEvent):void 
{ 
    switch (event.keyCode) 
    { 
     case Keyboard.UP: 
     { 
      upPressed = true; 
      break; 
     } 
     case Keyboard.DOWN: 
     { 
      downPressed = true; 
      break; 
     } 
     case Keyboard.LEFT: 
     { 
      leftPressed = true; 
      break; 
     } 
     case Keyboard.RIGHT: 
     { 
      rightPressed = true; 
      break; 
     } 
    } 
} 

function fl_UnsetKeyPressed_2(event:KeyboardEvent):void 
{ 
    switch (event.keyCode) 
    { 
     case Keyboard.UP: 
     { 
      upPressed = false; 
      break; 
     } 
     case Keyboard.DOWN: 
     { 
      downPressed = false; 
      break; 
     } 
     case Keyboard.LEFT: 
     { 
      leftPressed = false; 
      break; 
     } 
     case Keyboard.RIGHT: 
     { 
      rightPressed = false; 
      break; 
     } 
    } 
} 

function addMissile(evt:TimerEvent):void { 
    var missile:Missile = new Missile(); 
    var side:Number = Math.ceil(Math.random() * 4); 
    if (side == 1) { 
     missile.x = Math.random() * stage.stageWidth; 
     missile.y = - missile.height; 
    } else if (side == 2) { 
     missile.x = stage.stageWidth + missile.width; 
     missile.y = Math.random() * stage.stageHeight; 
    } else if (side == 3) { 
     missile.x = Math.random() * stage.stageWidth; 
     missile.y = stage.stageHeight + missile.height; 
    } else if (side == 4) { 
     missile.x = - missile.width 
     missile.y = Math.random() * stage.stageHeight; 
    } 
    missile.angle = getAngle(missile.x, missile.y, plane.x, plane.y); 
    missile.speed = Math.ceil(Math.random() * 15); 
    addChild(missile); 
    missile.push(missile); 
} 

function moveObjects(evt:Event):void { 
    moveMissile(); 
} 

function moveMissile():void { 
    for (var i:int = 0; i < missile.length; i++) { 
     var dx = Math.cos(rad2deg(missile[i].angle)) * missile[i].speed; 
     var dy = Math.sin(rad2deg(missile[i].angle)) * missile[i].speed; 
     missile[i].x += dx; 
     missile[i].y += dy; 
    } 
} 

function getAngle(x1:Number, y1:Number, x2:Number, y2:Number):Number { 
    var radians:Number = Math.atan2(y2 - y1, x2 - x1); 
    return rad2deg(radians); 
} 

Answer 1

我想我找到了答案。尝试添加到您的代码：

deg2rad = Math.PI/180; 
rad2deg = 180/Math.PI; 

让我知道这是否工作。

Answer 2

它看起来不像你定义了一个函数rad2deg()？

添加这个地方：

function rad2deg(radians:Number):Number 
{ 
    return radians * 180/Math.PI; 
} 

需要注意的是，唯一的地方，你会发现在Flash中有用度被设置DisplayObject的rotation。

例如，您的代码中的此行将无法按预期工作 - Math.cos()等等需要弧度。

Math.cos(rad2deg(missile[i].angle))