Coding a Physics Engine from scratch!

Published: 03 November 2025
on channel: Zanzlanz

453,852

23k

but man, rigid bodies got hands

Really into it? Want the source code? Join my Patreon!   / zanzlanz

Obstacle course:
Play in browser (Use Chrome, please): https://zanzlanz.com/g/Skater_Without...

HUGE thanks to ‪@crypticsea‬ for inspiring this video! Please follow his development on YouTube and Bluesky: https://bsky.app/profile/crypticsea.b...

My other work mentioned:
"The PowerPoint video":    • Making the most complicated PowerPoint game!
Infinite Bounce: https://zanzlanz.com/g/Infinite_Bounce
Differential growth: https://zanzlanz.com/doodles?q=%23dif...

Games mentioned or shown:
Skate or Don't!: https://store.steampowered.com/app/18...
World of Goo 2: https://store.steampowered.com/app/33...
Unravel: https://store.steampowered.com/app/12...
The Floor is Jelly: https://store.steampowered.com/app/29...
Line Rider: https://www.linerider.com/
Gish (By Cryptic Sea): https://store.steampowered.com/app/95...

‪@anukarimusic‬ is so cool!! I'm so sorry for mispronouncing it in the video AAAH

All music is my own, many "Works In Progress" for this monthly series:
At 0:00 and 7:53 - WIP made specifically for this video! Download available to patrons.
At 1:06 - WIP made for    • I analyzed 100 games to see why they are fun!   Download available to patrons.
At 2:13 - "Mirror Road":    • Zanzlanz - Mirror Road (music video coded ...
At 4:40 - WIP made for    • Making the most complicated PowerPoint game!   Download available to patrons.
Outro and at 5:39 - WIP made for this series! Starting with    • I coded 100 games in 20 years!   Download available to patrons.
At 7:04 - "A Feeling of Tread":    • A Feeling of Tread - Full track (Henry Sti...
At 8:58 - WIP made for unrelated series:    • I added multiplayer! — Mine Blocks 1.31: S...
At 10:19 - Instrumental version of "Where Did the Time Go": https://www.newgrounds.com/audio/list...

Chapters:
00:00 Intro
00:31 Level 1: Bouncing ball
02:12 Level 2: Angled walls
04:35 Level 3: Corners
05:37 Level 4: Colliding circles
07:01 Level 5: Ropes
08:07 Level 6: Soft bodies
08:35 Level 7: Differential growth
08:57 Level 8: Rigid bodies
10:18 Level 9: Skate or Don't
11:24 Finale

#gamedev #gamedevelopment #programming

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