Jiggle bones

Jiggle bones are a feature of the Source Engine that allow a skeleton model 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.

Objects that use jiggle bones

The Hustler's Hallmark's jiggle bones.

Class	Type	Object	Location of jiggle bones
Scout	Weapons	Holy Mackerel	The fish.
		Mad Milk	The milk inside the bottle.
		Unarmed Combat	The arm.
		Wrap Assassin	The wrapping paper.
	Hats	Hero's Tail	The ponytail.
Soldier	Weapons	Black Box	The flap on the back.
		Buff Banner	The flag.
		Disciplinary Action	The leather loop.
	Misc	Professor's Pineapple	The vials.
Pyro	Weapons	Manmelter	The liquid.
	Hats	Area 451	The entire head.
		Birdcage	The cage door and perch.
		Connoisseur's Cap	The entire hat.
		Flamboyant Flamenco	The skulls.
		Handyman's Handle	The wooden handle.
		Napper's Respite	The tip of the hat.
		Respectless Rubber Glove	The glove's fingers.
		Stately Steel Toe	The entire boot.
		Triboniophorus Tyrannus	The entire creature.
		Waxy Wayfinder	The flame.
	Misc	Cremator's Conscience	The dolls.
		Fallen Angel	The wings.
		Jingle Belt	The bells.
		Professor's Pineapple	The vials.
		Scrap Pack	The robot's chainsaw and fuel tank.
		Sight for Sore Eyes	The pupils.
		Stockbroker's Scarf	The tie.
		Tail From the Crypt	The tail.
Demoman	Hats	Buccaneer's Bicorne	The feathers.
		Conjurer's Cowl	The tail of the hood.
		Hustler's Hallmark	The feather.
		Mask of the Shaman	The hair-like tendrils.
		Sober Stuntman	The straps.
	Misc	Aladdin's Private Reserve	The rings.
		Bird-Man of Aberdeen	The bird.
		Liquor Locker	The chest itself, as well as its lock.
		Professor's Pineapple	The vials.
		King of Scotland Cape	The back of the cape
Heavy	Hats	Coupe D'isaster	The toupee.
		Gym Rat	The quiff.
		Pugilist's Protector	The straps.
Engineer	Misc	Googly Gazer	The eye.
		Teddy Roosebelt	The bear's head.
Medic	Weapons	Vita-Saw	The liquid within the container.
	Hats	Doctor's Sack	The entire ice-pack.
	Misc	Dr. Gogglestache	The flaps.
		Emerald Jarate	The neon liquid and antennae.
		Nine-Pipe Problem	The pipe.
		Quadwrangler	The tubing.
		Scrap Pack	The robot's chainsaw and fuel tank.
		Surgeon's Side Satchel	The clipboard attached to the satchel.
		Surgeon's Stethoscope	The tube.
Sniper	Weapons
		Cozy Camper	The Stainless Pot and Jarate.
		Darwin's Danger Shield	The crocodile's tail.
	Hats	Swagman's Swatter	The corks.
	Misc	Crocodile Smile	The teeth.
All classes	Weapons	Botkiller Weapons	The head.
	Hats	A Rather Festive Tree	The tree.
		Alien Swarm Parasite	The tail.
		B.M.O.C.	The pom-pom.
		Full Head Of Steam	The pressure gauge.
		Max's Severed Head	The ears.
		MONOCULUS!	The eyeball and stalk at the back.
		Spiral Sallet	The plume on the back.
		Treasure Hat	The chest's lid.
	Skull Island Topper	The eyeball.
	Misc	Companion Cube Pin	The cube.
		Earbuds	The cords.
Resurrection Associate Pin		The cube.
NPC	N/A	Horseless Headless Horsemann	The Horsemann's cape.
		MONOCULUS	The eye stalk and flaps of skin at the back.

Bugs

• Currently, some items with jigglebones will appear to be fixed at their furthest position during movement. Whilst in this position they seem to vibrate.
• Items that can jiggle in a circular motion, such as the Holy Mackerel, may twist themselves in impossible ways, making the item appear X-shaped.

Notes

• Jigglebones will be automatically frozen below a given framerate (45 fps by default), set by cl_jiggle_bone_framerate_cutoff.

External links

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