Expression Controller Builder

A builder that lets you assemble expressions like distance and length by clicking buttons instead of typing them by hand. Bind node sub-anims or constants to two scalar variables (dis, dis2) and two vector variables (a, b), and load and edit existing expressions from the target track. It is handy for quickly building stretch-bone and joint-correction setups in rigging, and comes with built-in joint presets such as Thigh, Knee, and Biceps.