Increment variable on click jquery

Question

i´m working on an interactive Infographic. Basically there are is a number of circles flying around. I try to change the amount of circles by clicking on a button, therefor I want to increase the variable d by 1 on click, to get an other element from the array. But it doesnt´t work. Any ideas?

var leuko = ["167", "143", "134", "96"]; //array


var d = 0; //variable

$("#day").click(function() {

d += 1;

_

for (var i = 0; i < leuko[d]; i++) {

var x = 20 + (Math.random() * (canvasWidth - 40));
var y = 20 + (Math.random() * (canvasHeight - 40));

var radius = 5;
var vX = Math.random() * 0.2;
var vY = Math.random() * 0.2;

I hope you can understand my problem, as my english isn´t the best.

Here is a jsfiddle-link. Layout looks a little bit messed up..

http://jsfiddle.net/JDU6H/

Thanks!

your script is incrementing d, but the problem is, that this variable is used only once on document ready.. — Michal Klouda
– Michal Klouda, Commented Nov 10, 2012 at 15:19
If you want to totally rewrite your code, I could help you in StackOverflow chat here. My first language is German ;) — ComFreek
– ComFreek, Commented Nov 10, 2012 at 15:24
@FelixSchneider Click here: chat.stackoverflow.com/rooms/19373/… — ComFreek
– ComFreek, Commented Nov 10, 2012 at 15:48

ComFreek · Accepted Answer · 2012-11-10 15:31:56Z

1

Without rewriting many parts of your code, you can simply change your click function:

$("#day").click(function() {
    d += 1;

    var x = 20 + (Math.random() * (canvasWidth - 40));
    var y = 20 + (Math.random() * (canvasHeight - 40));

    var radius = 5;
    var vX = Math.random() * 0.2;
    var vY = Math.random() * 0.2;

    zellen.push(new Zelle(x, y, radius, vX, vY));
});

http://jsfiddle.net/JDU6H/2/

Nevertheless I'd recommend you creating a class for all cells and adding an add() function.

edited Nov 10, 2012 at 15:31

answered Nov 10, 2012 at 15:21

ComFreek

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1 Comment

Felix Schneider Over a year ago

This works fine. The only problem is, that I dont want to add just one more circel, but change the elemet from the array. For example I want to draw leuko[0] (167 circles) and then change the element to leuko[1] (143 circles) and so on...

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