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Jorrit Rouwe @jrouwe.bsky.social · 16/07/2026

Faster ray casting, fluid simulation, larger scale soft body simulation, perhaps rigid body simulation for VFX. See: github.com/jrouwe/JoltP...

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Jorrit Rouwe @jrouwe.bsky.social · 12/07/2026

Using HLSL means no dependencies need to be installed on Windows (my main platform) because DXC comes with WinSDK. Switching to slang would introduce a dependency on Win and change a dependency on macOS, so I don't immediately see what this move gains me.

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Jorrit Rouwe @jrouwe.bsky.social · 10/04/2026

That's interesting. I was focused on providing a minimal API but completely overlooked that you can dynamically link to VK. I'll see if I can fix that.

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Jorrit Rouwe @jrouwe.bsky.social · 06/04/2026

Jolt Physics just hit 10K GitHub stars! What started in 2014 as a CPU vs GPU ray casting experiment became a full physics engine in 2021. Seeing what you’re building with it is amazing. Thank you!

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Jorrit Rouwe @jrouwe.bsky.social · 06/04/2026

Was it difficult to integrate? I wasn't sure what the best API was to provide to users to allow integrating in their own engine / with their own renderer.

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Jorrit Rouwe @jrouwe.bsky.social · 27/01/2026

A typical way of creating a reproduction project is to take your existing project and strip out everything that is irrellevant until you have the smallest possible project that still shows the issue.

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Jorrit Rouwe @jrouwe.bsky.social · 27/01/2026

You create a small godot project that demonstrates the problem (i.e. crashes or misbehaves) and attach it to the ticket so that I can debug it. 1 ticket per issue please (a crash is something else than misbehaving physics).

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Jorrit Rouwe @jrouwe.bsky.social · 25/01/2026

Create a ticket with a MRP at github.com/godotengine/... and I'll have a look.

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Reposted by Jorrit Rouwe

stellarica-io.bsky.social @stellarica-io.bsky.social · 22/01/2026

Early prototype of a real-time, physics-driven car deformation system built in Godot on top of Jolt Physics. All deformation is computed at runtime (no pre-baked damage), and it runs in real time on older mobile hardware. Video: youtu.be/5Msbd0XtCsg

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Reposted by Jorrit Rouwe

Walaber @walaber.com · 17/01/2026

I should mention this is made with #Godot (4.5 will probably ship on 4.6) and will be my 3rd commercial release using @godotengine.org after Parking Garage Rally Circuit and Replicube!

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Jorrit Rouwe @jrouwe.bsky.social · 11/01/2026

Collision is against convex hulls. Each vertex finds the closest plane and uses that to collide. Simulation uses this: animation.rwth-aachen.de/media/papers...

animation.rwth-aachen.de

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Jorrit Rouwe @jrouwe.bsky.social · 11/01/2026

Currently 4 ms on my 5070 Ti laptop GPU with the sim running at 360 Hz. I have to further optimize it though.

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Jorrit Rouwe @jrouwe.bsky.social · 10/01/2026

A sneak peak of what I've been working on: A strand based hair system for Jolt Physics (WIP): youtu.be/Rl19G0c003o

youtu.be

A strand based hair simulation running on GPU

YouTube video by Jorrit Rouwe

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Jorrit Rouwe @jrouwe.bsky.social · 08/01/2026

It is intended for future systems that are too compute heavy to run on a CPU, e.g. fluids. I'm about to publish the first new system (not fluids) that uses it. Since not all environments support compute, it will always be an optional thing.

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Jorrit Rouwe @jrouwe.bsky.social · 06/05/2025

The tree consisting of 2047 rods runs in about 0.4 ms on my i9-12900H. The multi threading of this single instance could be made better. If I simulate 20 of these trees at the same time then it does achieve better parallelism and the time per instance is about 0.1 ms.

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Jorrit Rouwe @jrouwe.bsky.social · 05/05/2025

Added support for Cosserat rods to Jolt Physics. This is a stick constraint with an orientation that can be used to attach geometry. Can be used e.g. to simulate vegetation in a cheap way.

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Jorrit Rouwe @jrouwe.bsky.social · 15/03/2025

Jolt Physics v5.3.0 is out! Release notes are here: github.com/jrouwe/JoltP... (Video is from a new test that validates cross platform character determinism)

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Jorrit Rouwe @jrouwe.bsky.social · 03/01/2025

The Jolt Physics samples now also run on macOS (using Vulkan)! I'm pretty new to making apps for mac. If you have experience and I'm doing it wrong, let me know. Change is here: github.com/jrouwe/JoltP...

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Jorrit Rouwe @jrouwe.bsky.social · 29/12/2024

The Jolt Physics samples now run natively on Linux (using Vulkan).

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Jorrit Rouwe @jrouwe.bsky.social · 03/11/2024

JoltPhysics v5.2.0 is out! Amongst other things, it includes a new tapered cylinder shape. Check out the release notes at github.com/jrouwe/JoltP...

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