HI,

I have a question wheather it is pefectly reasonable to create bone transformation matricies without translation part.

in case, that, all bones are connected to each other, plus, bones cannot bend, plus, bonnes cannot scale (move their ends closer), plus, all bones are rooted to common ancestor. Will this result in a 'in place' animation, which will be the same animation, but bones will not move if the common ancestor translates (in the end, translation of common ancestor bone is ignored too). The common ancestor is spine. Each bone has its absolute 3x3 matrix of rotation, that contains in its matrix rotations of parent bones up to ancestor.

Thanks!

Becouse I have a little disbelief. If one rotates something in space by 3x3 matrix , he rotates it around 0,0,0 point. Rotation around an arbitray point of the space is a transformation thet needs the fourth translation part? Is it? I would like the bone matricies be in object space, not bone local space, thus, they would have to rotate around 0,0,0 point, but, have them effectively rotate around their local rooty point, which in turn is an arbitrary point of object space.