Cycling 74 » Topic: Curious how to write this JS using Max objects

Curious how to write this JS using Max objects

withakay — Sat, 14 Jan 2012 23:00:48 +0000

This is a pretty simple bit of Javascript but I can’t figure out a clear way to get the same results with Max objects, it was just masses of spaghetti so I gave up and just used the JS. But it has been bugging me so, out of curiosity, would anyone care to show me how you would do this in Max?

var lastindex = 0;
var a = 0;
var b = 1;

function msg_int(index)
{
	if (index > lastindex) {
		if (index % 2 > 0) {
			a += (index-lastindex)+1;
		} else { // even
			b += (index-lastindex)+1;
		}
	} else {
		if (index % 2 > 0) {
			b -= (lastindex-index)+1;
		} else {
			a -= (lastindex-index)+1;
		}
	}
	lastindex = index;
	outlet(0,a,b);
}

Re: Curious how to write this JS using Max objects

Ch — Sun, 15 Jan 2012 01:30:49 +0000

here is a way :

– Pasted Max Patch, click to expand. –

but it is not really readable…
maybe it would be better by using some large [expr], but i think keeping it in the js is the best option for readability of the algorithm.

Re: Curious how to write this JS using Max objects

Christopher Dobrian — Sun, 15 Jan 2012 20:42:49 +0000

IMHO, what you have here — setting variables in nested if clauses — is a pretty classic situation where an imperative language seems (to most) to be simpler than the more dataflow-ish model of Max. Since you’ve already solved it in JS, there’s no need to redo it in Max, right? It’s feasible to rewrite it as an abstraction, but why bother?

Re: Curious how to write this JS using Max objects

Roman Thilenius — Sun, 15 Jan 2012 21:50:32 +0000

i dont really get that java stuff, but from what i can tell it could look something like that:

[expr ($f2>$f1)*( (($f2%2)>0)*(($f2-$f1)(notpossible)+1) ) + ($f2< =$f1)*( ($f2%2)>0)*(($f2-$f1)(notpossible)+1) )]

but since there cant be an accumulator inside expr, i think you would need at least 6 objects to do this, even
if you accumulate by routing the expr´s output back to some +$f3.

-110