Random Number Question

rose

Hello all..

I have this simple bit of code which is used regularly in my movie...

minNum = 1;
maxNum = 200;
number = Math.ceil(Math.random() * (maxNum - minNum + 1)) + (minNum - 1);

Is it possible to add something to this code to stop the same number being called more than once?

David

You can thank the forums by not cross-posting next time! :)

Here is another method, though it is a bit longer: var minNum:Number = 1;
var maxNum:Number = 200;
var numbers:Array = new Array();
var count:Number = 0;
for (i=minNum; i<=maxNum; i++) {
numbers[i-1] = i;
}
numbers.sort(shuffle);
this.onMouseDown = function():Void {
trace(getNum());
};
function shuffle():Number {
return Math.floor(Math.random()*3)-1;
}
function getNum():Number {
if (numbers[count] == numbers[numbers.length-1]) {
numbers.sort(shuffle);
count = 0;
}
return numbers[count++];
}

I don't remember where I first saw the shuffle function, but it isn't my creation.

Cheers for all of the help...

Much appreciated...

David

hmmm, there are several ways to do this I'm sure but the way I've done this in the past is to generate an array containing all your numbers - then randomly pick a number from the array, after retreiving that number, splice that number from the array.

var numArr:Array = ;
var minNum:Number = 0;
var maxNum:Number = 200;

// popluate array
for(var i:Number=0; i<=maxNum; i++) {
numArr.push(i);
}

// function to retreive number
var retreiveNum = function():Number {
var max:Number = numArr.length-1;

// if max is less than 0, then all numbers from the array have been picked
if(max >= 0) {
var num:Number = minNum + Math.floor(Math.random()*(max+1-minNum));
var arNum:Number = numArr[num];
numArr.splice(num,1);
return arNum;
}
}

_root.onMouseDown = function() {
trace(retreiveNum());
}

lol

#If you have any other info about this subject , Please add it free.#

edit

Random Number Question

Pages

Categories

Archives

Meta