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
		King of Scotland Cape	The back of the cape
		Liquor Locker	The chest itself, as well as its lock
		Professor's Pineapple	The vials
Heavy	Hats	Coupe D'isaster	The toupee
		Gym Rat	The quiff
		Pugilist's Protector	The straps
	Misc	Grand Duchess Tutu	The entire tutu
Engineer	Misc	Googly Gazer	The eye
		Teddy Roosebelt	The bear's head
Medic	Weapons	Vaccinator	The liquid within the glass vial
		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 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	Bat Outta Hell	The entire spine and lower jaw
		Botkiller weapons	The head
		Festive weapons	The decorations
		Ham Shank	The meat
	Hats	A Rather Festive Tree	The tree
		Alien Swarm Parasite	The tail
		B.M.O.C.	The pom-pom
		Crone's Dome	The tip of the hat
		Full Head Of Steam	The pressure gauge
		Ghostly Gibus	The ghost
		Max's Severed Head	The ears
		MONOCULUS!	The eyeball and stalk at the back
		Skull Island Topper	The eyeball
		Spiral Sallet	The plume on the back
		Treasure Hat	The chest's lid
	Misc	Companion Cube Pin	The cube
		Earbuds	The cords
		Resurrection Associate Pin	The cube
		Saxxy Clapper Badge	The clapper
		Fortune Hunter	The axe
NPCs	N/A	Horseless Headless Horsemann	The Horsemann's cape
		Merasmus	His Cloak, The fish heads, The bag and the Eyeball in his hat
		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