Danny Chapman
@rat-face.bsky.social
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).
Reposted by Danny Chapman
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...
www.theguardian.com/news/audio/2...
Is it safe to visit the US? – podcast
Adam Gabbatt reports on the visa and green-card holders being held in US detention centres
www.theguardian.com
April 8, 2025 at 10:27 AM
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...
www.theguardian.com/news/audio/2...
Reposted by Danny Chapman
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.
March 21, 2025 at 2:43 PM
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.
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?!
March 3, 2025 at 11:47 AM
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?!
Reposted by Danny Chapman
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-...
Spring-It-On: The Game Developer's Spring-Roll-Call
Computer Science, Machine Learning, Programming, Art, Mathematics, Philosophy, and Short Fiction
theorangeduck.com
February 25, 2025 at 1:28 AM
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-...
My best typo ever. How did that happen?!
January 29, 2025 at 3:21 PM
My best typo ever. How did that happen?!
@chrisbrooke.bsky.social Does this count as a credit or debit on my #FestiveBrookeEntryTax bill?
December 19, 2024 at 9:15 PM
@chrisbrooke.bsky.social Does this count as a credit or debit on my #FestiveBrookeEntryTax bill?
Very impressive (and fun!) demo: metamotivo.metademolab.com/demo
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.
metamotivo.metademolab.com
December 16, 2024 at 4:38 PM
Very impressive (and fun!) demo: metamotivo.metademolab.com/demo
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...
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...
www.unrealengine.com
December 6, 2024 at 1:14 PM
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...
Just stumbled across this old video by accident (from WeightShift days) - I remember having fun with this chap!
November 25, 2024 at 11:25 PM
Just stumbled across this old video by accident (from WeightShift days) - I remember having fun with this chap!
Reposted by Danny Chapman
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...
It also details some variations, including one which is ~2x faster to compute with more regular convergence.
theorangeduck.com/page/variati...
November 23, 2024 at 4:27 PM
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...
It also details some variations, including one which is ~2x faster to compute with more regular convergence.
theorangeduck.com/page/variati...
Reposted by Danny Chapman
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)
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)
November 18, 2024 at 7:47 PM
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)
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)
Reposted by Danny Chapman
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
New results coming soon! #BiomechSky
November 18, 2024 at 2:15 PM
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
New results coming soon! #BiomechSky
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
November 17, 2024 at 2:00 AM
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
Reposted by Danny Chapman
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!
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!
November 13, 2024 at 9:13 AM
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!
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!
Reposted by Danny Chapman
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.
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.
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...
fab.com
November 14, 2024 at 6:54 PM
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.
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.
Reposted by Danny Chapman
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/...
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/...
November 8, 2024 at 5:32 AM
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/...
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/...
Derek Sivers is a smart guy and likes rats. I approve. t.co/ZTYiMdM8wh
https://sive.rs/rats
t.co
November 12, 2024 at 6:45 PM
Derek Sivers is a smart guy and likes rats. I approve. t.co/ZTYiMdM8wh