Hi @jwatte, seems like you know your math, so this approach you describe. Is there any chance you can create a BP that does that? I currently only have two points (positions of two motioncontrollers for VR). Do i use that vector between those two points as forward vector? and just use z-axis as up vector as default? If so, then i got that part done, but then you lost me when u said, i can plunk those into a matrix to make my orientation? Do you mean “Make Rotation from Axes”?
This btw, does NOT work. It still flips out at forward pointing up, and actually makes the orientation jitter around, probably because the up-vector changes constantly. And also the axes are flipped once i move one controller behind the other. See recording here:
[Video showing behavior][2]