Freya Holmér

Video: "Lerp Smoothing is broken" + interactive slides! (Patreon)

Published:

2024-05-30 13:34:01

Imported:

2026-06

Tags:

math talks video

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My talk about lerp smoothing from Guadalindie 2024 is now live!

Also, as patreon supporters, y'all get access to the slides I made for this presentation as well~ 💖

You'll find the slides attached to this post! They look much better in person I promise, the AV team at the venue had me lower the framerate for this presentation you have no idea how much it hurt ;-; also the video compression on top? horrible, when it's a framerate sensitive talk 😔

Anyway, be sure to open the slides in an up-to-date browser on desktop, ideally chrome. It should work in firefox as well though. You'll have to zoom in your browser to make the slides fit the screen, it's not the most user friendly, since they were designed for only one user, ie: me, and then use WASD to navigate the slides, plus some mouse interaction where applicable!

Also, since it's web tech, the source is readable, which might be useful or educational! (That said, keep in mind that it's not open source, and you don't have my permission to use my code)

I've also got a blog post coming up soon on the same topic, that goes a little more in-depth about some of the approximations of lerp smoothing, and their benefits and drawbacks, so, stay tuned for that!

As always, thanks a ton for your support. You're all the reason I'm able to do these financially questionable deep dives into obscure topics like this~ 💞

// Freya

Files

Lerp smoothing is broken - a journey of decay and delta time

I had to learn differential equations for this oh boy First off - a big thanks to the organizers at Guadalindie for inviting me and letting me publish the recording! Second - I've been working on a blog post about lerp smoothing in the background, this talk is like a distilled version of that yet-to-be-published blog, so keep an eye out for that if you want to dig deeper! If you want to stay in touch and in the know whenever I release new videos, blog posts or unity plugins, be sure to sign up to my mailing list! https://acegikmo.substack.com/ Recorded at Guadalindie 2024, May 3rd Timestamps: 00:00 Start 00:20 How to lerp smooth 02:07 The problem of framerate dependence 03:49 Linear motion 10:55 What is lerp? 12:32 The non-linear behavior of lerp smoothing 18:40 Finding continuity 20:23 Unraveling recursion 28:51 Going framerate independent 40:00 Half-Life 47:21 Summary 49:37 tldr (the useful part you want to copy/paste) 51:00 Q: How important is experimenting with math? 54:30 Bonus slide: Differential calculus 55:33 Bonus slide: Spring physics 56:39 Outro 💖 Patreon ❱ https://www.patreon.com/acegikmo 🐦 Twitter ❱ https://twitter.com/FreyaHolmer 📺 Twitch ❱ https://www.twitch.tv/acegikmo 💬 Discord ❱ https://discord.gg/v5VWuga 🌸 Instagram ❱ https://instagram.com/freya_holmer