| Since | 20.5 |
This component sets up the necessary constraints and blends to do a local blend between an IK and FK chain. The IK/FK blend control consists of two parts - an abstract control that drives the blend value between IK and FK, and a position control that allows you to set the position of the abstract control.
The IK/FK blend component uses an IK chain as a reference, so one must be set up upstream using the multi IK component. However, it is not necessary to have existing FK nodes in the hierarchy. The IK/FK blend finds the relevant skeleton joints used for IK, and automatically creates FK nodes at those joints if they don’t already exist.
See rigging a character for an example use of this component.
Parameters ¶
name
The name to add to the IK/FK blend abstract and position controls. This name is not necessary when using segments because the segment name is also added to the nodes.
mapping
The mapping used to identify the relationship between the IK and FK nodes. This parameter is in the format mapping:<skeleton>, for example, mapping:Guides.skel.
When an FK transform component converts a skeleton joint hierarchy to a TransformObject node hierarchy, it adds a mapping entry to the properties dictionary attribute on each node. This mapping entry contains the name of the reference skeleton and the joint that was used to create the node, for example, "mapping:Guides.skel":"hand_l". Later on, if you set up an IK chain using the multi IK component, the new IK controls will also contain a mapping entry to specify the reference skeleton and joint used to create the control. So you could have an FK control and IK control that have the same mapping information because they were created from the same skeleton and joint. The IK/FK blend component then fetches the joints with the same mapping and performs a blend between the two.
Settings ¶
abstractpos
The position of the abstract control as a relative offset. By default, the abstract control is placed in the middle of the joint chain.
abstractscale
The scale of the abstract control.
promote_t
When turned on, promotes the translate of the FK controls added by this component.
promote_r
When turned on, promotes the rotate of the FK controls added by this component.
promote_s
When turned on, promotes the scale of the FK controls added by this component.
Driven ¶
segments
Segments are tags that separate each IK/FK blend. For example, *Leg loops over tags L_Leg and R_Leg. Tags can be set up on skeleton joints using an 
Attribute Adjust Array SOP. See preparing skeletons for rigging for more information.
If segments is empty, the IK/FK blend logic is run once.
Note
The segments parameter does not take APEX path patterns, for example, the %tag() function. Instead, specify the tag names directly in this field.
iknodes
An APEX path pattern that specifies the IK nodes that are included in the IK/FK blend.
fk_prefix
The prefix to add to the new FK chain. When setting up the IK/FK blend, you don’t need to have FK nodes in the hierarchy. The IK/FK blend component creates an FK chain if one doesn’t already exist.
fk_suffix
The suffix to add to the new FK chain. When setting up the IK/FK blend, you don’t need to have FK nodes in the hierarchy. The IK/FK component creates an FK chain if one doesn’t already exist.
fknodes
An APEX path pattern that specifies the FK nodes to include in the IK/FK blend. This can be used if the FK nodes already exist in the rig hierarchy. The IK/FK component loops over the IK nodes, and uses the mapping value to make sure that the IK and FK hierarchies match.
Driver ¶
parent
The main driver of the abstract control. When empty, the abstract controls are not parented.
Tags ¶
| See also |
APEX Autorig Component