MousePressed : select only item in front

[GoToLoop]

@Chrisir

It is necessary in the constructor, but not in clicked() or show().

Converting my Processing code to p5.js (ArrayList + others!)

That’s not how we define classes’ constructor, methods & fields under JS syntax! You should read the JS reference for it: Also, there’s no ArrayList either. We use JS arrays instead: And while in Java we can generally omit the keyword this before accessing a class member, in JS it’s mandatory: [This Dot - Daniel Shiffman (Coding Train)] Now w/ all the info above, here’s a partial but proper JS conversion of your class ParticleSystem: class ParticleSystem { constructor(posit…