Algodoo

I like the concept, functionality, and presentation, but what's up with "sim.borders"? I don't believe Algodoo supports a "sim.borders" method.

Thanks for pointing it out. The code doesn´t work out currently on the uploaded version. The sign is supposed to change to text: "hide particles" when clicked and simultaniously hide the borders of the particles. The first part is easily enabled by adding an onSpawn line for setting sim.borders to true, but the latter still doesn´t work somehow, even though it did when I created the simulation. I´ll need to check that on my main PC when I have time.

It should now work as intended.

Yes, works as intended. Congratulations on fixing the issue. Creating new application variables is not good practice, better to use "Scene.my." variables.

yes, thanks for pointing that out as well. I intended to do that but accidently typed "sim.borders" and didnt question it because it initially worked

You can keep all of the particle selection code in onClick like this:

onClick = (e)=>{
sim.borders = ! sim.borders;
sim.borders ? {
text = "hide particles"
} : {
text = "show particles"
}
}