Jiggle bones

Jiggle bones are a feature of the Source Engine that allow a model skeleton to bounce or wiggle realistically with the object it is attached to. The effect is calculated and rendered in real time, giving a more realistic depiction of the way the part would move. Jiggle bones are used frequently on several items in Team Fortress 2 to add to their appearance.

Items that use jigglebones

Type	Object	Location of jigglebones
Hat	Alien Swarm Parasite	The tail and legs.
Hat	Max's Severed Head	The ears.
Misc. Item	Earbuds	The cords.
Hat	Hustler's Hallmark	The feather.
Hat	Napper's Respite	The tip of the hat.
Hat	Triboniophorus Tyrannus	The entire creature.
Hat	Respectless Rubber Glove	The fingers of the glove.
Hat	Handyman's Handle	The wooden handle.
Weapon	Mad Milk	The milk inside the bottle.
Weapon	Holy Mackerel	The fish.
Weapon	Black Box	The flaps on the front and back.
Weapon	Darwin's Danger Shield	The tail at the bottom.
Hat	Sober Stuntman	The straps
Hat	Pugilist's Protector	The straps.
Weapon	Medigun	The tube connecting it to the backpack.
Model	Medic	The twin tails of his coat.
Model	Scout	The dogtags on his neck.
Weapon	Vita-Saw	The liquid in the container.

External links

• $jigglebone on the Valve Developer Community – technical explanation of $jigglebone