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Danny Chapman

@rat-face.bsky.social
60 followers 44 following 34 posts

Procedural/physical animation at Epic Games, previously founder at WeightShift & lead Euphoria dev at NaturalMotion. Wrote PicaSim (R/C flight simulator). I play the concertina, cello and bandoneon. Based in Oxford (UK).

PostsRepliesMedia
Danny Chapman @rat-face.bsky.social · 17/12/2025
"Can you pet the octopus?" www.youtube.com/watch?v=Zu0S... by @andidev.bsky.social
youtube.com
Roris' Garden - Meta Quest Unreal Physic Control Rig Sandbox
YouTube video by AndiDev
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Danny Chapman @rat-face.bsky.social · 12/12/2025
My talk at #UnrealFest Stockholm on #ControlRig physics in #UnrealEngine has just been released: youtu.be/HennjwB6zZ8?...
youtu.be
Control Rig Physics: Fast, Fun, and Expressive Character Animation | Unreal Fest Stockholm 2025
YouTube video by Unreal Engine
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Danny Chapman @rat-face.bsky.social · 27/11/2025
Lyra recommends: How to rig a dog leg in #ControlEngine dev.epicgames.com/community/le...
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Reposted by Danny Chapman
Randall Munroe @xkcd.com · 08/04/2025
Tariffs xkcd.com/3073
256312048709
Danny Chapman @rat-face.bsky.social · 08/04/2025
1. I'm half way through listening to this, which is horrifying. The question for me is, as a potential traveller to the US: "Is CostOfDetention*P(detained) - BenefitOfTrip * (1 - P(detained))" +ve or -ve? www.theguardian.com/news/audio/2...
theguardian.com
Is it safe to visit the US? – podcast
Adam Gabbatt reports on the visa and green-card holders being held in US detention centres
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Andreas - Match Tree, Wishlist on Steam 🐑 @andidev.bsky.social · 21/03/2025
Heute abend auf twitch.tv/ard findet die Preisvergabe für den Puls GameJam statt. Es wird spannend in 5 Kategorien. Es sind einfach tolle Spiele entstanden.
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Danny Chapman @rat-face.bsky.social · 03/03/2025
Whenever there's an internet outage here I always do a little ratty web search to check if it's back. But... is this the most horrific episode of Dexter ever?!
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Daniel Holden @theorangeduck.bsky.social · 25/02/2025
Learned a new spring fact from my colleague @rat-face.bsky.social recently. For a critically damped spring tracking a target moving at a constant velocity, the amount of time the spring will lag behind the target is given by "halflife / ln(2)". Added to my blog post theorangeduck.com/page/spring-...
theorangeduck.com
Spring-It-On: The Game Developer's Spring-Roll-Call
Computer Science, Machine Learning, Programming, Art, Mathematics, Philosophy, and Short Fiction
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Danny Chapman @rat-face.bsky.social · 29/01/2025
My best typo ever. How did that happen?!
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Danny Chapman @rat-face.bsky.social · 19/12/2024
@chrisbrooke.bsky.social Does this count as a credit or debit on my #FestiveBrookeEntryTax bill?
Dog and cat lying side by side on the tummy of a long suffering owner as he tries to sleep on the sofa
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Danny Chapman @rat-face.bsky.social · 16/12/2024
Very impressive (and fun!) demo: metamotivo.metademolab.com/demo
metamotivo.metademolab.com
Meta Motivo
A first-of-its-kind behavioral foundation model to control a virtual physics-based humanoid agent for a wide range of whole-body tasks.
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Danny Chapman @rat-face.bsky.social · 06/12/2024
UE sample Project Titan is now available, and it looks great (I don't care if I'm biased!) - www.unrealengine.com/en-US/news/t...
unrealengine.com
Download the Project Titan Sample Game
The Project Titan Sample Game is now available! Dive in and explore this huge open world environment created with 4,000 developers and artists in an epic collaborative art jam over the course of 10 we...
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Danny Chapman @rat-face.bsky.social · 25/11/2024
Just stumbled across this old video by accident (from WeightShift days) - I remember having fun with this chap!
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Daniel Holden @theorangeduck.bsky.social · 23/11/2024
My latest article is about one of my favorite techniques in graphics - Müller's method of Polar Decomposition. It also details some variations, including one which is ~2x faster to compute with more regular convergence. theorangeduck.com/page/variati...
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Joseph Conlon @josephpconlon.bsky.social · 18/11/2024
I'm a physicist and I don't major in complex emotions, but when I think about my subject my spine tingles. Me reading from my book. Let's see how this compares to the other place. (Split in two as videos have to be less than 60 secs)
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Thomas Geijtenbeek @tgeijten.bsky.social · 18/11/2024
Now that Bluesky has native video support, I figured it's time for a repost: Teaching a biomechanical model to run using reinforcement learning. New results coming soon! #BiomechSky
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Danny Chapman @rat-face.bsky.social · 17/11/2024
His Dark Materials - this is the bit where Mrs Coulter shouts "Lyra!", and I sit up straight and quiver, but Lyra just carries on snoring. #NervesOfSteel
Dog called Lyra sleeping and snoring whilst Mrs Coulter shouts "Lyra" in a scary voice
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Remco Nijs @remconicedev.bsky.social · 13/11/2024
Wanted to showcase some of my early experimentation with the physics control plugin in Unreal Engine. Physics control allows direct tweaking and modifying of a physics asset's "ragdoll behavior" on a bone-per-bone basis through blueprints, making it modifiable in runtime and highly customizable!
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Caleb Longmire @clongmire42.bsky.social · 14/11/2024
Do you like Gameplay Animation and want to learn more about how it works? Well we just released an update to our Game Animation Sample project for #UE5 .5! Get it here - fab.com/s/46a85e1ef0c5 P.S. You may have to remove local content in the EGL library in order to get the 5.5 version.
fab.com
Game Animation Sample
This project showcases fully functional animation systems that are commonly needed in games. It is built using current best practices and can be used for learning or to help you kickstart your own cre...
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Michiel van de Panne @mvandepanne.bsky.social · 08/11/2024
Control physics-based characters at interactive rates to climb over tables and more. No learning! Key ideas: (a) partwise MPC: switch between full-body and factored body-part MPC as convenient; (b) strategy guidance via sparse contact keyframes. SCA 2024 www.cs.ubc.ca/~van/papers/...
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Danny Chapman @rat-face.bsky.social · 12/11/2024
Derek Sivers is a smart guy and likes rats. I approve. t.co/ZTYiMdM8wh
t.co
https://sive.rs/rats
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