I'm trying to make the switch from matrices to quaternions for skeletal animation in my OpenGL program, but I've encountered a problem:
Given a number of unit quaternions, I need to get a quaternion that when used to transform a vector will give a vector that is the average of the vector transformed by each quaternion individually. (with matrices I would simply add the matrices together and divide by the number of matrices)
I tried Slerping the quaternions as suggested here but that didn't work for what I'm trying to do (model was distorted), so I simply ended up transforming the vectors by each quaternion and then doing an average (until I can find a better solution).