cast int to float in javascript

Unity Engine
1

This is an embarrassing question but:
How do I cast an int to a float in javascript?

In C/C++, this would be:
int a = 10;
float b = (float)a;

For now I am using:
var a = 10;
var b = 20;

/…/

var c:float = a;
var d:float = b;

var e:float = c/d;

But I don’t want to create a new variable just to cast something.

More generally, how does one cast objects/primitives in javascript? I could not find a good resource on this anywhere.

Thanks,
Jon

2

Casting in UnityScript is done through as
so

a as float

for example.
though the cast in that direction should normally work implicitely too

3

I tried that earlier and got:
Assets/Height Map/DynamicallyMakePlanes.js(370,41): BCE0006: ‘int’ is a value type. The ‘as’ operator can only be used with reference types.

I think it doesn’t work since int is a primitive?

4

In Javascript it would be

var a = 10;
var b : float = a;

–Eric

5

heh I log in for a completely unrelated purpose and learn something useful (“as”). Thanks dreamora. (I really need to go update my JavaScript/UnityScript article, but I think someone else did a better one…)

6

Eric:

Maybe this is nitpicky, but say you have:

var a = 10;
var b = 20;
var c:float = a/b;

You would get c == 0.
Is the only way to get around this to do:

var a = 10;
var b = 20;
var af:float = a;
var bf:float = b;

var c:float = af/bf;

7

var c : float = parseFloat(a) / b;

or

var c : float = (a+0.0) / b;

–Eric

8

Thanks! I appreciate the fix Eric.

9

for my project I have gotten this to work out pretty simply:

#pragma strict

var af =0.0;

var ai = 0;

function Update ()
{
ai=af;
}