Algodoo

Quote: "Why are they doing this?"

Answer: Particles do not misbehave. They do exactly what YOU commanded them to do in your onCollide script.

Yeah, I know Im just joking, but thanks for taking the time and pointing it out anyway ^^

Why dont the contol keys a and s work, when I download the scene on another computer? Arent keybinds saved within the scene?

What keys are used in this scene? I may be able to answer your question if I can see the actual script.

Sorry, I meant to say "Where did you place the key handling script? I cannot seem to find it anywhere in the scene.

I have typed them into the main console:

keys.bind("a",{scene.my.multi = scene.my.multi +1})
keys.bind("s",{scene.my.multi = scene.my.multi -1})

Nevermind, I forgot to add "scene.my" at the beginning.

Oh, that's the problem! As of around 2012 we no longer use keys.bind because of some issues with it. We now use keys.isDown("key").

You can place the script in onKey, but for most applications it works just fine in postStep. In onKey, you get just one key press with each key press. In postStep, you get multiple key presses (machine gun style) if you hold the key down. For the keys you mentioned above, the script would look like the following:

Keys.isDown("a") ? {scene.my.delvel = scene.my.delvel +1}:{};
Keys.isDown("s") ? {scene.my.delvel = scene.my.delvel -1}:{}

Try it and let me know if you have any problems with it.

I tried it, and it seems to be working really well. Thanks alot!

It is actually multiple key presses on hold down even in onKey, just seems to be slower than postStep.

Okay, great!

Here is another helpful script for ya....

You probably noticed that the very first keypress of "a" or "s" it does not work. That's because the scene is always in "edit" mode, and keys a and s are used to trigger built-in functions. You can prevent that by forcing the scene into PLAY mode each time the scene RUNs. Here's how: In the upDate event of any geometry put the following script:
app.gui.playMode = sim.running

I use that in nearly every scene that I make. I think you will like it!

Works like a charm, thanks!