PPolySim OS
For First Responders · Cloth / Spring-Mass

Cloth / Spring-Mass for a roller-coaster loop

Built for first responders planning or training for real incidents. Run fast what-if scenarios for response planning and training — no software to install in the field. Simulate a roller-coaster loop live below — adjust the inputs and watch it respond, right in your browser.

Cloth / Spring-Mass StudioLive

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

▶ Run in Python

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.

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More with Cloth / Spring-Mass

Frequently asked questions

Is this good for first responders?
Yes — this version of "Cloth / Spring-Mass for a roller-coaster loop" is framed for first responders planning or training for real incidents. Run fast what-if scenarios for response planning and training — no software to install in the field.
Do I need to install anything?
No. It runs in any modern browser, free, with no account required.