Show HN: Simple 2D car physics with JavaScript

Happy new year, everyone<p><a href="https:&#x2F;&#x2F;imgur.com&#x2F;a&#x2F;AIxvWUh" rel="nofollow">https:&#x2F;&#x2F;imgur.com&#x2F;a&#x2F;AIxvWUh</a>

not 100% related but is there any good information source on the web to learn how to build a good car simulator ? I&#x27;ve looked around and it&#x27;s not very helpful. Usually I end up with physics courses which always repeating the same things. But not much about about : pneumatic (especially how they influence the overall speed), independent wheel modelling, suspension, mass shift, frame deformation, ...<p>I&#x27;ve checked the source code of torcs but it seems quite simple (although the results are very convincing).<p>My goal was to model a (indoor) kart.

&gt; multiplayer<p>before you venture there I suggest you move the control code outside of the physic code, abstracting car inputs into a throttle, brake, steer structure which is piloted by inputs elsewhere and feed into the physic update tick along with the car state, or it&#x27;ll make exceptionally hard to build input prediction and lag compensation further on

Love it. Reminds me of playing with similar car simulations in Flash when I was at school.<p>Now just make it isometric with collision detection and use maps built with this (currently also on the front page):<p><a href="https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=21923940" rel="nofollow">https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=21923940</a>

This is great and inspiring. Every few months I spin up a socket.io server and attempt to make an RPG. I get about as far as having the character move around the screen and then usually give up :D

Project page: <a href="https:&#x2F;&#x2F;github.com&#x2F;pakastin&#x2F;car" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;pakastin&#x2F;car</a>

That is totally amazing! Have played it for 5 minutes on my phone now :-)

How long would it take to make the whole screen one color (excluding the red car)? And what is the best strategy: driving in circles or fast alternating between gas and brake?

I see that it works on mobile but u can not for the life of me figure it what the control scheme is. I just touch the screen and the car and to randomly move.

I love how instantly hackable this is... clone the repo and serve the directory localy and still connects through websockets, no npm crap in the way. :)

The physics is really nice! Played with it for couple of minutes and even managed to drift&#x2F;draw &quot;2020&quot; trace on the ground :D

That&#x27;s pretty cool! Just fooling around with this made me think about replicating it with an Elixir backend.

Great work @pkstn! Works surprisingly well on a touchscreen. Really enjoyed deck of cards as well :)

Good work! Q: How well would multiplayer work if you used webRTC data sockets instead?

I spent more time than I care to admit zooming around on this page

This is very cool and fun! and its only one page of js code!

Wonderful! Please add some sounds for drifting :)

Networked spirograph simulator :)

This is nice. It would be cool to have an option of rendering the controls under my thumb?

Nice, but I do feel like it&#x27;s missing a set of tracks from the other set of wheels.

Multiplayer is live now!!! :D

Nice, can we get tracks too?

I like it how those patterns reveal different screen sizes&#x2F;resolutions.

Drifting is awesome.

it&#x27;s pretty cool and fun

Nice!

It&#x27;s fun! Nice work.