Show HN: A gravitational simulator toy that implements the Barnes-Hut algorithm

#1

Post by voithos » Thu, Jul 06, 2017, 1:39 AM UTC

Show HN: A gravitational simulator toy that implements the Barnes-Hut algorithm
skepsi.me

Re: Show HN: A gravitational simulator toy that implements the Barnes-Hut algorithm

#2

Post by vortico » Thu, Jul 06, 2017, 3:09 AM UTC

The "show quad tree" feature is really neat looking and educational for showing someone the Barnes-Hut algorithm. Is there a way to create lots of particles at once? Barnes-Hut isn't really needed until you hit thousands of particles, so can I create a galaxy of n particles quickly?

Re: Show HN: A gravitational simulator toy that implements the Barnes-Hut algorithm

#3

Post by voithos » Thu, Jul 06, 2017, 3:37 AM UTC

vortico wrote: post #2

The "show quad tree" feature is really neat looking and educational for showing someone the Barnes-Hut algorithm. Is there a way to create lots of particles at once? Barnes-Hut isn't really needed until you hit thousands of particles, so can I create a galaxy of n particles quickly?

You can use the "r" hotkey to create a bunch of random particles, but I think it only creates ~10 at a time (but you can hold the button down). That's a good idea, though.