how to use the pred_light in the rel

[xuheny]

hi @stevewongv, this is a very meaningful job. I have a question to ask. Is 'pred_light' a quaternion? Is it in the order of 'wxyz'? What kind of coordinate system is the result in?

[WebsheetPlugin]

@xuheny , did you solve this issue? Do you know how they should be constructed?