Cloth / Spring-Mass
Grab and swing a piece of cloth. It's a grid of masses linked by springs, pinned at the top and falling under gravity.
Cloth / Spring-Mass StudioLive
Verlet integration · constraint relaxation
Controls
A grid of masses linked by springs, pinned at the top. Grab any node and drag it around — it's a real Verlet cloth simulation.
Presets
Data Inspector
Nodes28×20
IntegratorVerlet
Constraintsdistance (×3/frame)
Governing equation
Reading this result: No wind, so the cloth hangs straight down from its pinned top row and settles into a smooth catenary once the motion damps out.
Runs locally in your browser — free forever. Scale to the cloud when reality gets heavy.
★ Sign in to save this setupSave your tuned setup, or drop this simulation into your own site, docs, or course page.
How it works
Each node is integrated with position-based Verlet dynamics, and the distances between neighbors are corrected by several relaxation passes per frame — the standard technique behind real-time cloth and soft-body simulation in games and film.
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The math, the assumptions, real-world uses, or a code translation — explained for this exact simulation.
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Frequently asked questions
Is this cloth simulation tool really free?▾
Yes. Cloth / Spring-Mass runs entirely in your browser using your device's own compute, so local use is free forever. You only pay Compute Tokens if you scale a job to the cloud.
Do I need to install anything?▾
No. Everything runs client-side in a modern browser — no downloads, no license, no account required to start.
Can I save or share my simulation?▾
Create a free account to save projects, and use a shareable embed or minted DOI to publish a live, interactive version anywhere.
How accurate are the results?▾
The solver uses established numerical methods, but results are for research and educational purposes and should be validated against experiment or professional review before you rely on them.