AS3 - 射击游戏 - hitTestObject答案

【问题标题】：AS3 - Shooting Game - hitTestObjectAS3 - 射击游戏 - hitTestObject
【发布时间】：2015-09-17 16:21:50
【问题描述】：

我即将完成我的大学项目。但我坚持使用hittestobject。

var Player: gun = new gun();
Player.x = mouseX;
Player.y = mouseY;
addChild(Player);

stage.addEventListener(MouseEvent.MOUSE_MOVE, mousemove);
stage.addEventListener(MouseEvent.MOUSE_DOWN, shoot);
stage.addEventListener(MouseEvent.MOUSE_UP, release_shoot);

function mousemove(e: MouseEvent): void
{
	Player.x = mouseX + 200;
	Player.y = mouseY + 35;
}

function shoot(event: Event): void
{
	var Bullet: bullet = new bullet();
	/*var explosion:explo1 = new explo1(); */
	Bullet.x = Player.x;
	Bullet.y = Player.y;
	/*	explosion.x = Player.x;
		explosion.y = Player.y;*/
	Player.rotationX = 5;
	Player.rotationY = 5;
	addChild(Bullet);
	/*	addChild(explosion);*/
	Bullet.addEventListener(Event.ENTER_FRAME, moveBullet);
}

function release_shoot(event: Event): void
{
	var explosion: explo1 = new explo1();
	Player.rotationX = -5;
	Player.rotationY = -5;
}

function moveBullet(e: Event): void
{
	e.target.y -= 12;
	e.target.x -= 96;
	if (e.target.y <= -200 || e.target.x <= -200)
	{
		e.target.removeEventListener(Event.ENTER_FRAME, moveBullet);
		removeChild(MovieClip(e.target));
	}
}

function goesside_1(event: Event): void
{
	mc_target.x -= 2;
	if (mc_target.x < -20)
		mc_target.x = 550;
}
mc_target.addEventListener(Event.ENTER_FRAME, goesside_1);

function targeting(event: Event): void
{
	var bullet: MovieClip = MovieClip(event.target);
	if (bullet.hitTestObject(mc_target))
	{
		mc_burst.x = mc_target.x;
		mc_burst.y = mc_target.y;
		mc_burst.gotoAndPlay(2);
		mc_target.x = 200;
		mc_target.removeEventListener(Event.ENTER_FRAME, targeting);
		mc_target.x = 200;
		trace("targerting");
	}
	else if (mc_target.x > 550)
		bullet.removeEventListener(Event.ENTER_FRAME, targeting);
	else
		bullet.y -= 12;
	bullet.x -= 96;
}

毫无疑问，子弹正中目标，我看到了哈哈……但不会用mc_burst 替换mc_target。

编辑

这是我为感兴趣的人使用的工作代码：

var Player:gun = new gun(); 
Player.x = mouseX; 
Player.y = mouseY; 
addChild(Player); 

stage.addEventListener(MouseEvent.MOUSE_MOVE, mousemove); 
stage.addEventListener(MouseEvent.MOUSE_DOWN, shoot); 
stage.addEventListener(MouseEvent.MOUSE_UP, release_shoot); 
function mousemove(e:MouseEvent):void{ 
Player.x = mouseX + 200; 
Player.y = mouseY + 35; 
} 

function shoot(event:Event):void{ 
var bullet1:bullet = new bullet();
/*var explosion:explo1 = new explo1(); */
    bullet1.x = Player.x;
    bullet1.y = Player.y;
/*  explosion.x = Player.x;
    explosion.y = Player.y;*/
    Player.rotationX = 5;
    Player.rotationY = 5;
    addChild(bullet1); 
/*  addChild(explosion);*/
    bullet1.addEventListener(Event.ENTER_FRAME, targeting); 
} 

function release_shoot(event:Event):void{ 
var explosion:explo1 = new explo1(); 
    Player.rotationX =- 5;
    Player.rotationY =- 5;

}

function movebullet(e:Event):void{ 
e.target.y -= 12;
e.target.x -=96;/*When the function is called the targets Y position will be subract by 40 pixels every frame, this makes the movieclip move up. The target is the Bullet movieclip.*/
if(e.target.y <= -200 && e.target.x <= -200 ){ 
e.target.removeEventListener(Event.ENTER_FRAME, movebullet);
removeChild(MovieClip(e.target));
}
}
function goesside_1(event:Event):void {
    mc_target.x -= 2;
        if (mc_target.x < -20)
        mc_target.x = 550;
}
mc_target.addEventListener(Event.ENTER_FRAME, goesside_1);

function targeting(event:Event):void {
    var bullet1:MovieClip = MovieClip(event.target);
    if (bullet1.hitTestObject(mc_target)){
        mc_burst.x = mc_target.y;
        mc_burst.y = mc_target.x;
        mc_burst.gotoAndPlay(2);
        mc_target.x = 200;
        mc_target.removeEventListener(Event.ENTER_FRAME, targeting);
        mc_target.x = 200;
        trace("targerting");
    } 
    else if (mc_target.x > 550){
        bullet1.removeEventListener(Event.ENTER_FRAME, targeting);
    }
    else{
    bullet1.y -= 12;
    bullet1.x -= 96;}

}
// REPLACING CURSOR BY A SIGHT //

import flash.ui.Mouse;

Mouse.hide();

var myCursor:sight = new sight();

myCursor.visible = false;

function init()
{
    addChild(myCursor);
    stage.addEventListener(MouseEvent.MOUSE_MOVE, mouseMoveHandler);
    stage.addEventListener(Event.MOUSE_LEAVE, mouseLeaveHandler);
    stage.addEventListener(MouseEvent.ROLL_OVER, mouseLeaveHandler);
    stage.addEventListener(MouseEvent.ROLL_OUT, mouseMoveHandler);

}

function mouseMoveHandler(evt:MouseEvent):void
{
    myCursor.visible = true;
    myCursor.x = evt.stageX + 10;
    myCursor.y = evt.stageY + 10;
}

function mouseLeaveHandler(evt:Event):void
{
    myCursor.visible = false;
}
init();

【问题讨论】：

你得到“定位”跟踪了吗？
我希望我得到它...但根本不是我放置它的原因。有什么方法可以给你发我的 FLash 吗？
顺便说一句，您在发布的代码末尾的最后一个 else if/else 语句中缺少大括号，因为它是块中的最后一个功能代码，它仍然可以工作
我没有看到您在任何地方调用该函数 (targeting) - 似乎您的意思是将其附加到 Enter Frame 事件。
我只是修复了 {} 并且不会改变任何东西。将检查定位

标签： actionscript-3 flash

【解决方案1】：

假设您发布的代码就是一切，问题是永远不会调用 targeting 方法。

似乎您想将其添加为输入帧事件的处理程序（因为您要在方法内删除该端的侦听器）

例如。

bulletInstance.addEventListener(Event.ENTER_FRAME, targeting);

也就是说，看看你的代码，你会想要结合你的移动和瞄准功能（你不想在你删除 moveBullet 函数中的项目符号后继续进行碰撞检查） - 或当您从屏幕上移除按钮时，至少移除 targeting 输入帧侦听器。

可能是这样的：

function removeBullet(b:MovieClip):void {
    b.removeEventListener(Event.ENTER_FRAME, moveBullet);
    removeChild(MovieClip(b));
}

function moveBullet(e:Event):void { 
    var bullet:MovieClip = MovieClip(event.target);

    bullet.y -= 12;
    bullet.x -= 96;

    if(bullet.y <= -200 || bullet.x <= -200 ){ 
        removeBullet(bullet);
    }

    if (bullet.hitTestObject(mc_target)){
        mc_burst.x = mc_target.x;
        mc_burst.y = mc_target.y;
        mc_burst.gotoAndPlay(2);
        mc_target.x = 200;

        removeBullet(bullet);
        trace("targerting");
    } else if (mc_target.x > 550){  
        removeBullet(bullet);
    }
}

如果您有许多项目符号，您可能希望只有一个进入帧处理程序，并在那里迭代每个项目符号 - 而不是为每个项目符号设置单独的进入帧处理程序。

另外，我很惊讶您没有收到错误，因为您的命名不明确。您有一个名为bullet 的类，但随后您也创建了名为bullet 的变量。 AS3 中的标准做法是给你的类名一个大写首字母，你的实例命名一个小写首字母。我建议您这样做以避免错误和模棱两可的代码。

【讨论】：

我可以在私信中问你其他事情吗？
StackOverflow 没有私人消息（我也没有提供任何形式的联系信息），但您可以在聊天中或作为评论提出问题

【解决方案2】：

我要感谢 BadFeelingAboutThis 在这里的快速帮助。

所以对于想要使用我的代码的人来说，现在就开始吧

var Player:gun = new gun(); 
Player.x = mouseX; 
Player.y = mouseY; 
addChild(Player); 

stage.addEventListener(MouseEvent.MOUSE_MOVE, mousemove); 
stage.addEventListener(MouseEvent.MOUSE_DOWN, shoot); 
stage.addEventListener(MouseEvent.MOUSE_UP, release_shoot); 
function mousemove(e:MouseEvent):void{ 
Player.x = mouseX + 200; 
Player.y = mouseY + 35; 
} 

function shoot(event:Event):void{ 
var bullet1:bullet = new bullet();
/*var explosion:explo1 = new explo1(); */
    bullet1.x = Player.x;
    bullet1.y = Player.y;
/*  explosion.x = Player.x;
    explosion.y = Player.y;*/
    Player.rotationX = 5;
    Player.rotationY = 5;
    addChild(bullet1); 
/*  addChild(explosion);*/
    bullet1.addEventListener(Event.ENTER_FRAME, targeting); 
} 

function release_shoot(event:Event):void{ 
var explosion:explo1 = new explo1(); 
    Player.rotationX =- 5;
    Player.rotationY =- 5;

}

function movebullet(e:Event):void{ 
e.target.y -= 12;
e.target.x -=96;/*When the function is called the targets Y position will be subract by 40 pixels every frame, this makes the movieclip move up. The target is the Bullet movieclip.*/
if(e.target.y <= -200 && e.target.x <= -200 ){ 
e.target.removeEventListener(Event.ENTER_FRAME, movebullet);
removeChild(MovieClip(e.target));
}
}
function goesside_1(event:Event):void {
    mc_target.x -= 2;
        if (mc_target.x < -20)
        mc_target.x = 550;
}
mc_target.addEventListener(Event.ENTER_FRAME, goesside_1);

function targeting(event:Event):void {
    var bullet1:MovieClip = MovieClip(event.target);
    if (bullet1.hitTestObject(mc_target)){
        mc_burst.x = mc_target.y;
        mc_burst.y = mc_target.x;
        mc_burst.gotoAndPlay(2);
        mc_target.x = 200;
        mc_target.removeEventListener(Event.ENTER_FRAME, targeting);
        mc_target.x = 200;
        trace("targerting");
    } 
    else if (mc_target.x > 550){
        bullet1.removeEventListener(Event.ENTER_FRAME, targeting);
    }
    else{
    bullet1.y -= 12;
    bullet1.x -= 96;}

}
// REPLACING CURSOR BY A SIGHT //

import flash.ui.Mouse;

Mouse.hide();

var myCursor:sight = new sight();

myCursor.visible = false;

function init()
{
    addChild(myCursor);
    stage.addEventListener(MouseEvent.MOUSE_MOVE, mouseMoveHandler);
    stage.addEventListener(Event.MOUSE_LEAVE, mouseLeaveHandler);
    stage.addEventListener(MouseEvent.ROLL_OVER, mouseLeaveHandler);
    stage.addEventListener(MouseEvent.ROLL_OUT, mouseMoveHandler);

}

function mouseMoveHandler(evt:MouseEvent):void
{
    myCursor.visible = true;
    myCursor.x = evt.stageX + 10;
    myCursor.y = evt.stageY + 10;
}

function mouseLeaveHandler(evt:Event):void
{
    myCursor.visible = false;
}
init();

【讨论】：