curveik's Introduction

CurveIK

CurveIK is an IK library for Unreal Engine 4. It provides a simple, single bone chain (no branches) solver that uses bezier curves to model the path of the bone chain.

This repo contains the initial release of the project - use in commercial projects should be done cautiously.

Demo

Animation Blueprints

Solver

Debug

Demo

Animation Blueprints

CurveIK provides a single animation blueprint node:

Paramaters

Solver

Property	Usage
Curve Type	Which type of curve the bones align with
Tip Bone	The last bone in the chain to be affected
Root Bone	The first bone in the chain to be affected
Max Iterations	Increasing this value can increase accuracy but may affect performance if set too high
Curve Detail	The number of subdivisions the curve is partitioned into. Increasing this value should make the curve smoother, but may affect performance
Curve Fit Tolerance	The acceptable amount of error between bone positions and the calculated curve position
Stretch	The degree to which the bones should stretch to fit the curve more precisely. High values will create short bones in areas of the curve with more bends, and longer bones in straight areas.
Handle Angle	The angle of offset (in degrees) for the bezier handles. The owning component's up vector is defined to be 0-degrees