Is there any way to convert from Internal to Cartesian coordinates using simple formulas?
I have studied and implemented: INTERNAL TO CARTESIAN by Jack D. Kunitz.
But somehow the x, y and z values are not correct. I am not implementing the transformation back to the initial frame as it says, because I do not understand that step. Is that the reason for not being able to get correct answers or is this not a good tutorial or solution to follow.