Boids
Learning and science
artificial life simulation
SHOW HN2015
63points
28comments
#443of 2,565 in 2015
Top 18%of 2015 by points
How HN took it
MixedNo clear lean
3 positive, 2 neutral or asking, 1 mixed, 1 critical, out of 7 comments about the project. Thread score +0.22.
Execution: 3 for, 0 againstPerformance: 0 for, 1 against
The thread, comment by comment
Each row is a top-level comment and its replies, in HN's order. Select a cell to open that comment on HN.
positive neutral or mixed critical about another commenter or something else the maker
What HN said
What people liked
Looks beautiful and fun to watch
From 1 comment
Yes, looks beautiful. Quite similar, I guess. I had run in to some performance issues, the initial few ticks are quiet slow even now, esp. on a phone. This one uses a kdtree…
anoop-elias on HN
Objections
Frame rate display is inaccurate and animation looks jerky
From 1 comment
I don't think the fps calculation is quite accurate, I was getting close to 60 fps and seeing lots of jerks.
luddypants on HN
Slow initial ticks, especially on phones
From 2 comments
Yes, looks beautiful. Quite similar, I guess. I had run in to some performance issues, the initial few ticks are quiet slow even now, esp. on a phone. This one uses a kdtree…
anoop-elias on HNI will have a look. The value initializes as 60, so it will show as 60 until it gets updated for the first time. Would that be what you are talking about? The initial few seconds…
anoopelias on HN
Requests
Suggestions for faster neighbour lookup using bins or quadtrees
From 2 comments
The best data structure to use depends a lot on what you're actually doing with your neighbours. If what you actually want to do is to have each boid be affected by each boid in…
repsilat on HNI mean if your world is 1024 by 768, and a boid is affected by all other boids within 64 pixels of it, you should just break the world up into 16 by 12 bins, each representing a…
repsilat on HN
Questions
Where to read about fixed-size bins
From 1 comment
Where can I read more about fixed-size bins?
anoopelias on HN
Alternatives named
SwarmJS quadtree boids simulation
From 1 comment
I was inspired by this to create my own a few months ago. It uses a quadtree to optimize nearest neighbor lookup to ideally reduce complexity from n^2 to nlogn on each tick.…
postnihilism on HN
Three.js GPU boids example
From 1 comment
Somewhat related: ThreeJS GPU boids simulation http://threejs.org/examples/#webgl_gpgpu_birds
bhouston on HN
Khan Academy natural simulations course
From 1 comment
Khan Academy has a good Natural Simulations in JS tract. https://www.khanacademy.org/computing/computer-programming/programming-natural-simulations It uses processing.js when I…
akilism on HN