Gravitle
Languages and libraries
physics engine library
SHOW HN2019
How HN took it
5 positive, 9 neutral or asking, 0 mixed, 7 critical, out of 21 comments about the project. Thread score -0.13.
Execution: 3 for, 6 againstIdea: 2 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
Fun to play with
From 1 comment
Man this is great fun! I got all scrunched up by the circles of doom.
andai on HN
Runs on unusual devices like BlackBerry and Firefox on Android
From 2 comments
This is very nice. It works perfectly on a BlackBerry K2 - with full keyboard support :)
boomskats on HNIdk if it breaks on other platforms, but Firefox on Android it's working to tap and hold the middle of the screen for the center thruster, left for left thruster, and right for…
connicpu on HN
Objections
Freezes or fails to load on several mobile browsers and devices
From 3 comments
Site freezes on Moto G4, latest Chrome after about a second. At least back button still worked.
markdog12 on HNDidn’t work on my iphone
mdonahoe on HNFreezes in Firefox mobile on a LG G5.
hu3 on HN
Fails in Safari without experimental WebGL 2.0 enabled
From 2 comments
This works in Chrome, but not Safari (macOS 10.14.5).
rgovostes on HNIt indeed works on Safari with WebGL 2.0 enabled (Developer -> Experimental Features)
boardwaalk on HN
Inconsistent results in Firefox on desktop
From 3 comments
Doesn't work in Firefox 67 on Windows.
Narishma on HNFreezes Firefox 67.0.4 on Mac.
rectang on HNRunning fine on FF 67.0.4 on win 10 here.
NikkiA on HN
Requests
Write a blog post explaining the implementation
From 1 comment
super interesting. Is there a blog post somewhere? how much better is the performance due to rust/wasm compared to implementing the physics in JS?
aloer on HN
Consider finite element methods for realism and robustness
From 1 comment
You might want to look into finite elements. That's a bit harder conceptually, but it's not that hard to implement and should be far more realistic and robust.
joelthelion on HN
Questions
How is stability ensured in the soft-body simulation
From 1 comment
How do you ensure stability? Based on the "learn more" section, I would presume the soft body is made up of vertices stitched together with damped springs. Is that accurate?
slavik81 on HN
How to use it on mobile
From 1 comment
How do I use this on mobile? The controls mention touchscreen...
gitgud on HN
Alternatives named
Xspringies
From 1 comment
Like the old xspringies from '93.
phkahler on HN