character random movement on stage as3

var iswalking = false;
var goX = char.x;
var goY = char.y;
var movespeed = 1;
var dir = "down";
var previousDistance:Number = 0;
var currentDistance:Number = 0;
var totalDistance:Number;

goX = Math.floor(Math.random() * (1+ (stage.stageWidth + char.width) + char.width) - char.width);
goY = Math.floor(Math.random() * (1+ (stage.stageHeight + char.height) + char.height) - char.height);

stage.addEventListener(Event.ENTER_FRAME, loop);
function loop(Event)
{// animation handling

    var GetDistance = Math.sqrt(Math.pow(char.x - this.goX,2) + Math.pow(char.y - this.goY,2));
    trace(GetDistance);


    if (iswalking == true)
    {
        char.w.play();
    }
    else
    {
        char.w.gotoAndStop(1);
    }
    // direction handling;
    char.gotoAndStop(dir);
    // movement handling;
    if ((goY-movespeed)>char.y)
    {
        char.y +=  movespeed;
        dir = "down";
        iswalking = true;
    }
    else if ((goY+movespeed)<char.y)
    {
        char.y -=  movespeed;
        dir = "up";
        iswalking = true;
    }
    else if ((goX-movespeed)>char.x)
    {
        char.x +=  movespeed;
        dir = "right";
        iswalking = true;
    }
    else if ((goX+movespeed)<char.x)
    {
        char.x -=  movespeed;
        dir = "left";
        iswalking = true;
    }
    else
    {
        iswalking = false;
        goX = Math.floor(Math.random() * (1+ (stage.stageWidth + char.width) + char.width) - char.width);
        goY = Math.floor(Math.random() * (1+ (stage.stageHeight + char.height) + char.height) - char.height);

    }
}

How to change registration point dynamically as3

function setRegPoint(obj:DisplayObjectContainer, newX:Number, newY:Number):void {
    //get the bounds of the object and the location
    //of the current registration point in relation
    //to the upper left corner of the graphical content
    //note: this is a PSEUDO currentRegX and currentRegY, as the
    //registration point of a display object is ALWAYS (0, 0):
    var bounds:Rectangle = obj.getBounds(obj.parent);
    var currentRegX:Number = obj.x - bounds.left;
    var currentRegY:Number = obj.y - bounds.top;
   
    var xOffset:Number = newX - currentRegX;
    var yOffset:Number = newY - currentRegY;
    //shift the object to its new location--
    //this will put it back in the same position
    //where it started (that is, VISUALLY anyway):
    obj.x += xOffset;
    obj.y += yOffset;
   
    //shift all the children the same amount,
    //but in the opposite direction
    for(var i:int = 0; i < obj.numChildren; i++) {
        obj.getChildAt(i).x -= xOffset;
        obj.getChildAt(i).y -= yOffset;
    }
}
book.addEventListener(MouseEvent.CLICK, bookClicked);
function bookClicked(event:MouseEvent):void {
    book.scaleX += .1;
    book.scaleY += .1;
}

//set the registration point for the book object in the middle instead:
setRegPoint(book, book.width / 2, book.height / 2);

Timer in as3

Timer in AS3:-

• 1.      Create one dynamic text named as ‘timer’.
• 2.      Go to action layer and write action script code.
• 3.      i.e., create one integer variable ‘timer’ assigned as 10.
• 4.      Create one timer object called ‘MyTimer’. And start the object by using start() function
• 5.      Create one enterframe event  and format time function for (mm:ss)
• 6.      And send that format to dynamic text by using .currentCount
• 7.      Press Ctrl+Enter to check the output.
•  

var square:MovieClip = new MovieClip();
var loader_txt:TextField = new TextField();
addChild(loader_txt);
addChild(square);

//square.graphics.lineStyle(3,0x00ff00);
square.graphics.beginFill(0x0000FF);
square.graphics.drawRect(0,0,150,15);
square.graphics.endFill();
square.x = stage.stageWidth/2-square.width/2;
square.y = stage.stageHeight/2-square.height/2;

var myTimer:Timer=new Timer(1000,10);
this.addEventListener(Event.ENTER_FRAME, loading);
myTimer.start();
function loading(e:Event):void {
    var total:Number=5;
    var loaded:Number=myTimer.currentCount;
    square.scaleX=loaded/total;
    loader_txt.text = ((loaded/total)*100)+ "%";
    if (total==loaded) {
        play();
        this.removeEventListener(Event.ENTER_FRAME, loading);
    }

}

var myTimer:Timer=new Timer(1000,10);
this.addEventListener(Event.ENTER_FRAME, loading);
myTimer.start();
function loading(e:Event):void {
    var total:Number=10;
    var loaded:Number=myTimer.currentCount;
    bar_mc.scaleX=loaded/total;
    loader_txt.text = ((loaded/total)*100)+ "%";
    if (total==loaded) {
        play();
        this.removeEventListener(Event.ENTER_FRAME, loading);
    }

}

zoom in, zoom out in as3

var count_zoom:Number = 0;

zoomInButton.addEventListener(MouseEvent.MOUSE_DOWN, zoomIn);
zoomOutButton.addEventListener(MouseEvent.MOUSE_DOWN, zoomOut);
function zoomIn(e:MouseEvent)
{
    bg.scaleX +=  .1;
    bg.scaleY +=  .1;
    count_zoom++;

}
function zoomOut(e:MouseEvent)
{
    bg.scaleX -=  .1;
    bg.scaleY -=  .1;
    count_zoom--;

}


stage.addEventListener(Event.ENTER_FRAME, loop);
function loop(e:Event)
{
    if (count_zoom == 0)
    {
        trace("0");
        zoomOutButton.visible = false;
    }
    if (count_zoom == 5)
    {
        trace("5");
        zoomInButton.visible = false;
    }
    if (count_zoom >= 1 && count_zoom <= 4)
    {
        trace("1,2,3,4");
        zoomInButton.visible = true;
        zoomOutButton.visible = true;
    }
}

1. Create movieclips instance name of bg, zoomInButton, zoomOutButton

Out put :-

swap depth using 'contains' keyword

var a:MovieClip = new MovieClip();
a.graphics.beginFill(0xFF0000);
a.graphics.drawRect(0,0,200,200);
a.graphics.endFill();
addChild(a);
var b:MovieClip = new MovieClip();
b.graphics.beginFill(0x00FF00);
b.graphics.drawRect(0,0,200,200);
b.graphics.endFill();
b.x = 350;
addChild(b);
var c:MovieClip = new MovieClip();
c.graphics.beginFill(0x0000FF);
c.graphics.drawCircle(0,0,50);
c.graphics.endFill();
a.addChild(c);

stage.addEventListener(MouseEvent.CLICK, swapChild);

function swapChild(e:MouseEvent){
    if(a.contains(c)){
        b.addChild(c);
    }else{
        a.addChild(c);
    }
}

How to set depth index in action script

var aindex = getChildIndex(a);
var bindex = getChildIndex(b);
var cindex = getChildIndex(c);
trace(aindex);
trace(bindex);
trace(cindex);
xx.addEventListener(MouseEvent.CLICK, clickScrollerItem);
function clickScrollerItem(e:MouseEvent):void
{
    //setChildIndex( bindex, 0);
   

    if (a > b)
    {
        setChildIndex(a,b.numChildren);
    }
    if (a < b)
    {
        setChildIndex(a,b.numChildren-1);
    }
    trace(aindex);
    trace(bindex);
    trace(cindex);
}

1. Create a movieclips with the instance names a,b,c,d.

Arrange as per the Fig below and press Ctrl+Enter to check output :

0
1
2

play sound using button in action script 3.0

var my_sound:SoundId = new SoundId();
var my_channel:SoundChannel = new SoundChannel();


play_btn.addEventListener(MouseEvent.CLICK, playSound);
stop_btn.addEventListener(MouseEvent.CLICK, stopSound);


function playSound(event:MouseEvent):void{
my_channel = my_sound.play();
}


function stopSound(event:MouseEvent):void{
my_channel.stop();
}


1. Create play button instance of 'play_btn'.
2. Create stop button instance of 'stop_btn'.