AS3 中的对象障碍？

Question

我是编码初学者，但我正在尝试制作 flash rpg 类型的游戏。我的游戏和步行者 (manmc) 周围有障碍。我一直在看 videos/reading 篇关于如何制作对象屏障的文章，但我似乎无法在不出错的情况下正确编码。我试图让我的角色在他撞到一棵树时停下来。这棵树被编码为 (treer1_MC)。我只是尝试在按下时对其进行编码，但它什么也没做，导致角色无法往回走。

import flash.events.KeyboardEvent;
import flash.ui.Keyboard;
import flash.display.MovieClip;
import flash.events.Event;
import flash.display.Stage;

manmc.gotoAndStop ("Stand Front Frame");

var rightPressed:Boolean = new Boolean(false);
var leftPressed:Boolean = new Boolean(false);
var upPressed:Boolean = new Boolean(false);
var downPressed:Boolean = new Boolean(false);
var manSpeed:Number = 3;

stage.addEventListener(KeyboardEvent.KEY_DOWN, keyDownHandler);
stage.addEventListener(KeyboardEvent.KEY_UP, keyUpHandler);
stage.addEventListener(Event.ENTER_FRAME, gameLoop);

function keyDownHandler (keyEvent:KeyboardEvent):void
{
    if(keyEvent.keyCode == Keyboard.RIGHT)
    {
        rightPressed = true;
    }
    else if(keyEvent.keyCode == Keyboard.LEFT)
    {
        leftPressed = true;
    }
    else if(keyEvent.keyCode == Keyboard.UP)
    {
        upPressed = true;
    }
    else if(keyEvent.keyCode == Keyboard.DOWN)
    {
        downPressed = true;
    }
}

function keyUpHandler (keyEvent:KeyboardEvent):void
{
    if(keyEvent.keyCode == Keyboard.RIGHT)
    {
        rightPressed = false;
        manmc.gotoAndStop("Stand Right Frame");
    }
    else if(keyEvent.keyCode == Keyboard.LEFT)
    {
        leftPressed = false;
        manmc.gotoAndStop("Stand Left Frame");
    }
    else if(keyEvent.keyCode == Keyboard.UP)
    {
        upPressed = false;
        manmc.gotoAndStop("Stand Back Frame");
    }
    else if(keyEvent.keyCode == Keyboard.DOWN)
    {
        downPressed = false;
        manmc.gotoAndStop("Stand Front Frame");
    }
}

function gameLoop(loopEvent:Event):void
{
    if(rightPressed)
    {
        if(manmc.x < 1050)
        {
            manmc.x += manSpeed;
        }
        manmc.gotoAndStop("Walk Right Frame");
    }
    else if(leftPressed)
    {
        if (manmc.x > 145)
        {
            manmc.x -= manSpeed;
        }
        manmc.gotoAndStop("Walk Left Frame");
    } 
    else if(downPressed)
    {
        if(manmc.y < 780)
        {
        manmc.y += manSpeed;
        }
        manmc.gotoAndStop("Walk Front Frame");
    }
        if (manmc.hitTest(treer1_MC))
    {
            trace("leftHit");
            manmc._x += 3;

    }
    else if(upPressed)
    {
        if(manmc.y > 145)
        {
            manmc.y -= manSpeed;
        }
        manmc.gotoAndStop("Walk Back Frame");
    }
}

这是据说要使用的编码教程。有什么建议吗？

if (manmc.hitTest(treer1_MC))
        trace("leftHit");
        manmc._x += 3;

Answer 1

只是因为碰撞条件的声明在你的"downPress"条件之外：

 else if(downPressed)
{
    if(manmc.y < 780)
    {
    manmc.y += manSpeed;
    }
    manmc.gotoAndStop("Walk Front Frame");
}
    if (manmc.hitTest(treer1_MC))
{
        trace("leftHit");
        manmc._x += 3;

}

缩进问题:)，正确的做法应该是：

 else if(downPressed)
{
    if(manmc.y < 780)
    {
    manmc.y += manSpeed;
    }
    manmc.gotoAndStop("Walk Front Frame");

    if (manmc.hitTest(treer1_MC))
    {
        trace("leftHit");
        manmc._x += 3;
    }
}

希望对您有所帮助 ;)

编辑：

manmc.hitTest(treer1_MC)

应该是：

manmc.hitTest对象(treer1_MC)

因为函数：hitTest() 是一个 AS2 函数，在 AS3 上有：hitTestPoint() 和 hitTestObject() ;)

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