sleitnick

@sleitnick • 39,102 subscribers

Engineer at https://t.co/fmbN8adq7V

Shorts

16,459 views

13,703 views

Videos

sweetdream.ai

Watch Anya Live

Anya is streaming live right now! Join her private show and enjoy exclusive content.

Private Show

Join now for exclusive access

Free preview available • Premium content

1,402,919 views • 5 months ago

61,939 views • 2 months ago

276,353 views • 2 years ago

39,210 views • 3 months ago

19,053 views • 10 months ago

11,714 views • 5 months ago

16,910 views • 10 months ago

20,358 views • 1 year ago

20,523 views • 1 year ago

15,579 views • 1 year ago

13,346 views • 11 months ago

11,468 views • 1 year ago

12,689 views • 1 year ago

13,455 views • 2 years ago

15,350 views • 3 years ago

10,406 views • 2 years ago

No more content to load

Live Cam

sleitnick

Shorts

Pop quiz! Why does one spinner wobble while the other does not? #RobloxDev

Gotta find a way to secretly deploy this to all Roblox devs

Videos

Watch Anya Live

You can use the quadratic formula to make homing missiles properly lead and hit their target. I've used this in games for like a decade. I wish they'd use examples like that in math class. Give practical/fun examples. I hated math b/c it was too abstract. Gamedev made it fun.

Manipulating 3D object with physical device! Lots of other things that this could be used for, e.g. recording handheld camera cinematics. ESP32 + Accelerometer/Gryo + WebSockets

Playing around with Roblox's aerodynamics! This is NOT using my airfoil module. I did add some control logic for flight stability, but raw control surface input is pretty stable still. I'm just actuating control surfaces and applying forward velocity! #RobloxDev

Stress-testing 100k agents. FPS dropped to 60. I had to move most of the logic to C++ to make this work. I could only scale to ~10k in GDScript before hitting a wall. Each "agent" is also just a cube here. Nothing complex. My goal is to get this stable at 144hz w/ 100k agents.

A tower crane using physical constraints. I don't really know what to do with this, but it was a fun experiment! #RobloxDev

ATC test using Roblox's TTS feature 🔊

The new crane generator makes this so much better

That satisfying seconds-hand tween. Just a fast tween using elastic easing function

Server authoritative movement with client prediction and rollback/replay support. In this example, the client exploits by moving a wall out of the way. But the server owns the movement. The client has failed predictions due to the exploit, and rolls back. #RobloxDev

DataStore Editor v3.6 is coming tomorrow! - Name field autocompletes to datastores in your experience - Key version selection - Recent keys are remembered - Closing/reopening the plugin retains state - Internal UI framework swapped to React Lua - And lots of bug fixes #RobloxDev

I've always wondered how box selection works, so I tried it out this morning as a warmup for the day. My algo here is simple, but not efficient (like 5ms for 10k cubes): - Get rectangle min/max points - Get screen point of each cube - Compare screen point to min/max bounds

It's almost ready

Another game dev pop quiz! I want to move a block forward until it hits the closest surface in front of it without clipping. Blockcasting can be used. But on Roblox, the result gives you a single point of contact (yellow dot). How do you solve for the green dot? #RobloxDev

My weekend project: Building a small "Right to Forget" helper service using Roblox OAuth and API keys.

Wired in the ball indicator UI. A lot still to do, but I'm glad I got the first pass of this part done tonight. Not finalized, but good enough for now. I DID end up sticking with Roact after all. #RobloxDev

16 bits of addressable read/write memory! This took me over an hour to wire up. #RobloxDev