Stores the absolute transforms. There is a seperate one of these for each keyframe.

• Need matrix, and quat+pos_vector versions - The matrix versions would be used to transform verts. - The quat_pos_vector versions will blend with other bones. - The conversion to matrices will need to be cached. - Use three arrays. - rotation quats( an array of four elements ). - translation quats(array of four elements ).

Maybe only need matrix version for absolute? - No, need to slerp between two absolute bones.

Don't need a matrix representation? - maybe not, if the these are only used to slerp up an intermediate set of bones.

NOTE: for transforming the verts, it will be faster to transform them with a 3x3 rotation matrix if there is no translation/scaling happening.