Stores the current pose for an IK constraint. Stores the current pose for an IK constraint. An IK constraint adjusts the rotation of 1 or 2 constrained bones so the tip of the last bone is as close to the target bone as possible. See [url]http://esotericsoftware.com/spine-ik-constraints[/url] in the Spine User Guide. For two bone IK, controls the bend direction of the IK bones, either 1 or -1. The bones that will be modified by this IK constraint. Modifying the array has no effect. For one bone IK, when true and the target is too close, the bone is scaled to reach it. The IK constraint's setup pose data. A percentage (0-1) that controls the mix between the constrained and unconstrained rotation. For two bone IK: if the parent bone has local nonuniform scale, the child bone's local Y translation is set to 0. For two bone IK, the target bone's distance from the maximum reach of the bones where rotation begins to slow. The bones will not straighten completely until the target is this far out of range. When true and the target is out of range, the parent bone is scaled to reach it. For two bone IK: 1) the child bone's local Y translation is set to 0, 2) stretch is not applied if softness is > 0, and 3) if the parent bone has local nonuniform scale, stretch is not applied. The bone that is the IK target.