request Vector.randomUnitVector()

Hey, I’ve seen this in a handful of other libraries and always wondered why it wasn’t included. If you don’t use random vectors, then what are you doing with you life? I use it so often I add it in almost all my projects, it looks like this;

THREE.Vector3.prototype.randomUnitVector = function(){
    this.x = Math.random() * 2 - 1;
    this.y = Math.random() * 2 - 1;
    this.z = Math.random() * 2 - 1;
    this.normalize();
    return this;
}

You would call it like this; let v = new THREE.Vector3().randomUnitVector();

The name is quite long, maybe in relations to other vector functions names like .randomize() (like normalize) or just .random() would be more logical? You could also give it an argument to set the length, but I find it more logical to call .setLength() afterwards because it wouldn’t be a unit vector anymore and it’s easier to read. I’m curious of what you think of it.

Kind regards, Ethan.

[Mugen87]

I still consider this whole topic application-specific.

You are right. Unless @mrdoob has a different opinion, I think I would prefer to wait if there are more similar feature requests in the future. Something like examples/jsm/math/Sampling.js or examples/jsm/math/Random.js can still be added then.

[greggman]

Just to add to the choir, for random colors I almost always prefer random hsl with a random hue but not random saturation or level (or some range but not 100% random). Like I don’t want something too light or too dark. In other words I agree with those claiming this is application specific.