Component:DynamicBoneChain

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Component image 

Dynamic Bone Chain component as seen in the Scene Inspector

Dynamic Bone Chain is a component that allows you to add rigidbody physics to the bones of a rigged model or avatar. Bones with rigidbody physics are called dynamic bones; this name is derived from a Unity asset that offers similar functionality.

To add dynamic bones to a model, navigate through the model's armature in the Inspector until you locate the bone you want to use as the "root" or "master" bone. Then, attach the Dynamic Bone Chain component, and click Setup From Children. This will add the root bone and all its children to the dynamic bone chain.

The Dynamic Bone Chain component contains various properties for adjusting the physical behavior of the bone chain. The most important properties in the component are Inertia, InertiaForce, Damping, Elasticity, and Stiffness. The descriptions of each are listed below:

Fields

Fields

Name	Type	Description
persistent	Bool	Determines whether or not this item will be saved to the server.
UpdateOrder	Int	Controls the order in which this component is updated.
Enabled	Bool	Controls whether or not this component is enabled.
Inertia	Float	Controls the amount of inertia a bone experiences. Does not affect acceleration of bones.
InertiaForce	Float	Controls the amount of inertia a bone experiences. Does affect acceleration of bones.
Damping	Float	Controls the amount of damping a bone experiences. A high damping value will cause bones to decelerate quickly.
Elasticity	Float	Controls the elasticity of bone joints. A high elasticity value will cause bones to accelerate toward their starting rotation more quickly.
Stiffness	Float	Controls the stiffness of bone joints.
SimulateTerminalBones	Bool	Whether or not to use the last bone in the chain. If your armature has end bones that do not control anything, you probably want this off.
BaseBoneRadius	Float	The default size of the sphere that allows a bone to be interacted with.
DynamicPlayerCollision	Bool
CollideWithOwnBody	Bool
HandCollisionVibration	VibratePreset
CollideWithHead	Bool
CollideWithBody	Bool
CollideWithLeftHand	Bool
CollideWithRightHand	Bool
Gravity	Float3
LocalSpace	Slot
UseParentSpace	Bool
OverrideRootSpace	RootSpace
UseUserGravityDirection	Bool
LocalForce	Float3
GlobalStretch	Float	How stretched out the bone chain should be at rest.
MaxStretchRatio	Float	The maximum amount of stretching that can be caused by pulling on the bones.
CurrentStretchRatio	Float	The current amount of stretching applied to the bones.
StretchRestoreSpeed	Float	How quickly extra stretching dissipates.
UseLocalUserSpace	SyncRefList<IDynamicBoneCollider>
LocalSpace	Slot
UseParentSpace	Bool
OverrideRootSpace	RootSpace
StaticColliders	SyncRefList`1	A list of dynamic bone collider components to be used.
VisualizeColliders	Bool	Causes all bone colliders to be displayed.
VisualizeBones	Bool	Causes the bones and the connections between them to be displayed.
IsGrabbable	Bool	Allows you to grab bones by touching them and grabbing.
ActiveUserRootOnly	Bool
AllowSteal	Bool	Whether or not a second user can grab the chain while someone is holding it.
GrabPriority	Int	Determines what gets grabbed if several grabbable objects are touching someone's grab sphere.
IgnoreGrabOnFirstBone	Bool
GrabRadiusTolerance	Float
GrabReleaseDistance	Float	How far a bone can be dragged before it automatically releases.
GrabSlipping	Bool
GrabTerminalBones	Bool	Whether or not the final bone in the chain can be grabbed.
GrabVibration	VibratePreset
IgnoreOwnLeftHand	Bool
IgnoreOwnRightHand	Bool
EffectorTarget	SyncList<Bone>	The chain tries to position one if its bones at this slot (used for grabbing)
EffectorBoneIndex	Int	Which bone is being positioned
EffectorBoneOffset	Float3
_activeGrabber	Grabber
Bones	SyncList`1