Description :

The v option with four numbers matches two vertices on
the brick (second set of two index numbers) with two on the base
(first set of two index numbers) by a translation to align
the first pair of vertices, then a rotation to align the second pair.
In this example a pentagonal pyramid has a slanting edge aligned
with a slanting edge on a squre pyramid, but in the opposit direction.
View this model with the command
off_align v pyr5,4,0,0,5 pyr4 M 2  antiview

