Actionscript 3 游戏中需要的程序帮助

Posted 2023-02-18

【中文标题】Actionscript 3 游戏中需要的程序帮助

【英文标题】：Program help needed in Actionscript 3 game

【发布时间】：2016-06-25 08:53:05

【问题描述】：

我一直在用 AS3 制作这个游戏，并且基本工作正常。我遇到的问题是在游戏开始时以及玩家死亡时出现“开始”菜单。我一直在尝试 .visible 代码，但这似乎不起作用。

问题：我在我的游戏中添加了哪些代码，以使开始按钮在游戏开始时出现，并且在玩家死亡时出现。代码：

package
import flash.display.MovieClip;
import flash.events.KeyboardEvent;
import flash.ui.Keyboard;
import flash.events.Event; //used for ENTER_FRAME event

public class Main extends MovieClip

    //constants
    const gravity:Number = 1.5;            //gravity of the game
    const dist_btw_obstacles:Number = 300; //distance between two obstacles
    const ob_speed:Number = 8;             //speed of the obstacle
    const jump_force:Number = 15;          //force with which it jumps

    //variables
    var player:Player = new Player();      
    var lastob:Obstacle = new Obstacle();  //varible to store the last obstacle in the obstacle array
    var obstacles:Array = new Array();     //an array to store all the obstacles
    var yspeed:Number = 0;                 //A variable representing the vertical speed of the bird
    var score:Number = 0;                  //A variable representing the score

    public function Main()
        init();
    

    function init():void 
        //initialize all the variables
        player = new Player();
        lastob = new Obstacle();
        obstacles = new Array();
        yspeed = 0;
        score = 0;

        //add player to center of the stage the stage
        player.x = stage.stageWidth/2;
        player.y = stage.stageHeight/2;
        addChild(player);

        //create 3 obstacles ()
        createObstacle();
        createObstacle();
        createObstacle();

        //Add EnterFrame EventListeners (which is called every frame) and KeyBoard EventListeners
        addEventListener(Event.ENTER_FRAME,onEnterFrameHandler);
        stage.addEventListener(KeyboardEvent.KEY_UP, key_up);
    

    private function key_up(event:KeyboardEvent)
        if(event.keyCode == Keyboard.SPACE)
            //If space is pressed then make the bird
            yspeed = -jump_force;
        
    

    function restart()
        if(contains(player))
            removeChild(player);
            for(var i:int = 0; i < obstacles.length; ++i)
                if(contains(obstacles[i]) && obstacles[i] != null)
                removeChild(obstacles[i]);
                obstacles[i] = null;
            
            obstacles.slice(0);
            init();
    

    function onEnterFrameHandler(event:Event)
        //update player
        yspeed += gravity;
        player.y += yspeed;

        //restart if the player touches the ground
        if(player.y + player.height/2 > stage.stageHeight)
            restart();
        

        //Don't allow the bird to go above the screen
        if(player.y - player.height/2 < 0)
            player.y = player.height/2;
        

        //update obstacles
        for(var i:int = 0;i<obstacles.length;++i)
            updateObstacle(i);
        

        //display the score
        scoretxt.text = String(score);
    

    //This functions update the obstacle
    function updateObstacle(i:int)
        var ob:Obstacle = obstacles[i];

        if(ob == null)
        return;
        ob.x -= ob_speed;

        if(ob.x < -ob.width)
            //if an obstacle reaches left of the stage then change its position to the back of the last obstacle
            changeObstacle(ob);
        

        //If the bird hits an obstacle then restart the game
        if(ob.hitTestPoint(player.x + player.width/2,player.y + player.height/2,true)
           || ob.hitTestPoint(player.x + player.width/2,player.y - player.height/2,true)
           || ob.hitTestPoint(player.x - player.width/2,player.y + player.height/2,true)
           || ob.hitTestPoint(player.x - player.width/2,player.y - player.height/2,true))
            restart();
        

        //If the bird got through the obstacle without hitting it then increase the score
        if((player.x - player.width/2 > ob.x + ob.width/2) && !ob.covered)
            ++score;
            ob.covered = true;
        
    

    //This function changes the position of the obstacle such that it will be the last obstacle and it also randomizes its y position
    function changeObstacle(ob:Obstacle)
        ob.x = lastob.x + dist_btw_obstacles;
        ob.y = 100+Math.random()*(stage.stageHeight-200);
        lastob = ob;
        ob.covered = false;
    

    //this function creates an obstacle
    function createObstacle()
        var ob:Obstacle = new Obstacle();
        if(lastob.x == 0)
        ob.x = 800;
        else
        ob.x = lastob.x + dist_btw_obstacles;
        ob.y = 100+Math.random()*(stage.stageHeight-200);
        addChild(ob);
        obstacles.push(ob);
        lastob = ob;
    

提前致谢！

【问题讨论】：

您问题中的开始按钮可见性代码在哪里？

这听起来像是家庭作业？

代码中没有关于菜单的内容。

【参考方案1】：

画一个盒子（有颜色填充但没有轮廓）。转换为MovieClip 类型。给一个名称，例如：“菜单” 它将是 菜单的容器。双击添加内容，添加 新图层上的图形和文本。或者，如果您在其他一些帧上已有内容，则只需

“剪切帧”

，然后在此新影片剪辑的时间轴内执行

“粘贴帧”

。李> 转换后，它被添加到

库

部分 (ctrl + L)。在库中找到它（“菜单”）并右键单击，然后选择“属性”。在

链接

部分点击“export for actionscript”。

类名

应自动变为“菜单”。现在只需点击“确定”即可。

游戏代码中的用法示例..（即：添加到屏幕或删除等）

//# load the movieClip...
var Menu_Screen : Menu = new Menu(); //# Menu is linkage name given in Library

//# Adding to screen...
gameContainer_MC.addChild( Menu_Screen );
gameCcontainer_MC.removeChild( Menu_Screen );

//# Controlling the movieClip...
Menu_Screen.x = 50;
gameContainer_MC.Menu_Screen.x = 50;