2D Collision Response | C Game + Engine From Scratch 09

If you would like to know more, here are the sources I used in no particular order:
* noonat.github.io/intersect
* blog.hamaluik.ca/posts/simple...
* github.com/pgkelley4/line-seg...
* • Handmade Hero Day 050 ... - Handmade Hero 50
* tavianator.com/2011/ray_box.html
* tavianator.com/2015/ray_box_n...
* www.deengames.com/blog/2020/a...
* Real-Time Collision Detection by Christer Ericson
Code used in recording: github.com/Falconerd/engine-f...
Pixel art for this series is custom made by Presley Carvalho. Check out his website here: perigic.com/
Background pixel art for this series is Kings and Pigs by Pixel Frog. Check it out here: pixelfrog-assets.itch.io/king...
Music for this series is from Breezy's Mega Quest by RyanAvx. Check it out here: ryanavx.itch.io/breezys-mega-...
➤ Website: dylanfalconer.com
➤ GitHub: github.com/Falconerd
➤ Twitch: / falconerd
➤ Discord: / discord

[@crix_h3eadshotgg992]

Here, have some motivation :D

[@DylanFalconer]

Thanks :)

[@AlexHicks_Tutorials]

Was doing this part this weekend on my engine, was nice to see we came around very closely to the same solution. I do like the exact step for when the collision time is equal and you solve the higher velocity axis first. 👍

[@DylanFalconer]

Nice one!

[@manasjoshi2939]

really great video! keep it up🙌

[@stillww]

2:38 C does have a sign function in the form of copysign(1, x) which compiles to just 2 instructions (andps with -0.0, orps with 1.0). In the case of x=0 it behaves differently than the method in the video (it returns 1 instead of 0) but that should be ok for the case in the video

[@DylanFalconer]

Oh good to know, thanks!

[@bricksnbuttons2000]

If we're calling sweep_response and static_response `iterations` times per physics_update() and and physics_update() is called once per frame isn't the true tick rate fps * iterations??

[@ashrasmun1]

2:58 would it be reasonable to get rid of the if-statement and write
hit.normal[(px < py)] = (px < py)((dx > 0) - (dx < 0)) + (px >= py)((dy > 0) - (dy < 0))
to make it branchless?

[@m.hosseinmahmoodi]

Can you push this part's code to Git? Thanks!

[@DylanFalconer]

Yes I can, cheers for the reminder.

[@mr.treefrog8641]

Are you sure you need stationary response? I remade this in Rust and I commented out my stationery response and I don’t have any issues with tunneling or glitchyness it’s as smooth as can be. Perhaps i am missing something or I am not hitting some edge case?

[@DylanFalconer]

I have found that without the stationary response there is glitching through corners. Perhaps there's some difference in the way our code is running that prevents this? Keen to understand why.

[@theunbearables]

Can you publish your rust version?

[@sphinxturner3520]

Which ide are you using?

[@DylanFalconer]

Neovim, with a few plugins - most notably Telescope, nvim-cmp, and the clangd language server

[@sphinxturner3520]

Thank you

[@nobodyinparticular968]

beautiful, now consider rotated ellipses 😈

[@ameera999]

please convert that to javascript