Flash AS3: Random Number Function, Returns a Random Number in Range

Posted October 2010 by Dan

Here’s a little Flash AS3 (ActionScript 3) function that returns a random number in a range given two numbers. Comes in handy when doing many things that require random values within a set range.

function randomRange(minNum:Number, maxNum:Number):Number {
var myRandomNum:Number = Math.floor(Math.random() * (maxNum - minNum + 1)) + minNum;
return myRandomNum;
}

//usuage
randomRange(2,22);

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Flash Helps: Create Text Field or Text Fields Dynamically

Posted April 2009 by Dan

Here’s a simple little example of creating actionscript 3 text fields dynamically.  It is also a great example of using functions to do all the dirty work for you.

In order for this to work you need to put a button component in the library.

This sample will create an input text field instance and a button instance.  When the user click on the button, it will create a new text field and set its x,y to random.

Here is the code:

import fl.controls.Button;
import flash.text.TextField;
import flash.text.TextFieldType;

//create a button
var myButton:Button = new Button();
myButton.label = "set text random x,y";
myButton.emphasized = true;
myButton.width = 150;
myButton.move(50, 100);
addChild(myButton);

var tf1:TextField = createTextField(10, 10, 400, 22, true);
tf1.type = TextFieldType.INPUT;

//create an input text field function
function createTextField(x:Number, y:Number, width:Number, height:Number, border:Boolean):TextField {
     var result:TextField = new TextField();
     result.x = x;
     result.y = y;
     result.width = width;
     result.height = height;
     result.background = true;
     result.border = border;
     addChild(result);
     return result;
}

//event that listens for the button to be clicked
myButton.addEventListener(MouseEvent.CLICK,setRandomXY);

//function that creates the new text field and sets the text
function setRandomXY(e:Event){
     var randomX = Math.random()*stage.width;
     var randomY = Math.random()*stage.height;
     var tf2:TextField = createTextField(randomX,randomY,50,20,false)
     tf2.type = TextFieldType.DYNAMIC;
     tf2.text = tf1.text;
}

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