Private
_aimThe aim axis of the constraint.
Private
_dstThe rest quaternion of the destination.
Private
_v3The _aimAxis but in an actual Vector3 form.
The object being constrained by the source.
The object constrains the destination.
The weight of the constraint.
The aim axis of the constraint.
The aim axis of the constraint.
A constraint that makes it look at a source object.
See: https://github.com/vrm-c/vrm-specification/tree/master/specification/VRMC_node_constraint-1.0_beta#roll-constraint