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# Interface: HDIKSys

Interfaces > Core Interfaces > HDIKSys

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This Core Interface provides methods for creating and removing History Dependent IK Chains.

Methods

    <void>HDIKSys.ikChain <node>startJoint <node>endJoint <boolean>createEndEffector

Creates an IK chain from the given start joint to the given end joint node.

If createEndEffect: is true, an end effector will be created.

    <boolean>HDIKSys.RemoveChain <node>chainNode

Calling this method on the master controller causes all slave controllers in the chain to be replaced with default transform controllers (PRS).

This method will support undo if it is enabled but will not turn undo on.

This method does not cause viewports to be redrawn.

#### See Also

- HD IK controller chains can be assigned to existing hierarchies