Convert a list of points into a list of coordinate numbers using a custom pattern.

By default the pattern equals XYZ which extracts the $x$, $y$, and $z$ coordinates of each input point and places them in the output list. Thus a list of three input points $[ABC]$ will result in a list of nine output numbers containing $[A_x{A}_y{A}_z{B}_x{B}_y{B}_z{C}_x{C}_y{C}_z]$.

The sequence of $x$, $y$, and $z$ characters in the pattern text defines the structure of the output list. Any other characters in the pattern are ignored.