FK Chain

Creates a simple FK chain.

Guides:

• ‘{number} Guide’ – Position where the FK joints will be. Number of guides is determined by the attribute ‘Joints’.

Attributes:

1. ‘Single Side Guide’ – For some Aim Guides, the ‘side_vector’ (twist) is locked and driven by a single ‘side_vector’, which keeps the orientation consistent. Uncheck this attribute to unlock them if you need more control over the twist. Re-template is required when changes are made. [Video]
2. ‘Ctrls Scale’ – Scale all the node ctrls. Note that the attachments ‘Ctrls Settings’ and ‘CtrlsShape’ will override this.
   [As of version 1.06.03]  ‘Update’ button to change the ctrls size without requiring a rebuild. [Video]
3. ‘Clean Transformations’ –  If checked, the zeroed pose will be the same as the bind pose; if unchecked, when zeroing the ctrls, they will align with a world axis specified in the following two attributes. [Video]
4. ‘World Orientation’ – The world axis the ctrls will align with when zeroed. Usually, this attribute’s default value is the correct value. [Video]
5. ‘World Orient Twist’ – Along with ‘World Orientation’, defines the ctrls zeroed pose. Usually, the default value of 0 is the correct value. [Video]
6. ‘Expose RotateOrder’ – Exposes all the ctrls ‘RotateOrder’ attribute in the Channel Box. [Video] 
7. ‘Secondary Ctrls’ – Secondary ctrls are added under some ctrls to help prevent gimbal lock.
   A visibility attribute is added to the parent ctrl. [Video]
8. ‘Joints’ – The number of joints/guides; modifying this attribute requires a ‘re-template’.
9. ‘Ctrls Translate’ – If checked, animators will also be able to translate the FK ctrls.
10. ‘Create Last Joint Ctrl’ – Creates a ctrl for the last joint.

Connections:

• ‘Root Input’ – Drives the whole node.
• ‘Root Output’ – An output at ‘fk_chain_0_jnt’.
• ‘Tip Output’ – An output at the last joint of the chain.

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