A test to figure out how fast it can get with javascript, doing verlet integration on 1000 points, with a hashgrid. No PVector. The inverse square root doesn't work with javascript, it seems... but in java, it doesn't seem to make a real difference (maybe my code isn't good enough!). Didn't use yet sleeping mode for points with velocity close to zero...
verlet code : thanks to keith peters! https://www.youtube.com/channel/UCF6F8LdCSWlRwQm_hfA2bcQ
hashgrid : thanks to ale! http://www.openprocessing.org/user/12899
inverse square root : thanks to kof! http://www.openprocessing.org/user/3942
Oh, that naughty sketch! Please let us know what the issue is below.
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