Converts a rotation matrix to Euler angles in ZYX order.
A rotation matrix.
The Euler angles in ZYX order.
https://github.com/FFI-no/n-vector/blob/f77f43d18ddb6b8ea4e1a8bb23a53700af965abb/nvector/R2zyx.m
Converts a rotation matrix to Euler angles in ZYX order.