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Spring-mass system | Simulation | Computer Animation | Khan Academy

Introduces the spring-mass system, where each segment of a modeled hair strand is connected to its neighbors by a virtual spring so the whole strand can bend and settle under gravity and motion. The core physics behind Merida's hair simulation in Brave.

Khan Academy Labs · 3 min · Advanced · VFX · VFX · 2017

What you take away

Explain how connecting points with virtual springs lets a modeled strand bend realistically.

Watch it

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SanDisk Professional G-DRIVE 8TB — Desktop archive drive built for footage
Corsair 128GB DDR5 kit — For Unreal, caches and twelve open applications
Intel Core Ultra 9 285K — Quick Sync, which some codecs still love
Apple Mac mini M4 — The cheapest Mac that cuts 4K without complaint
AMD Ryzen 9 9950X — 16 cores — the sweet spot for a cutting room
NVIDIA GeForce RTX 5080 — The sensible half-price render card

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