Re: [Groff] Vertical position not affected by .sp request

[Dave Kemper]

> The
> problem  is caused by the vertial position registers
> (.d and nl) not being affected by the  .sp  request.

Anton,

I get different results with your sample code depending on which macro
package I use.  Putting your code in a file called "test" and running
groff 1.21:

$ groff test > /dev/null
Initial vert. pos.:                 -1
Vert. pos. after .sp 40:            40
Vert. pos. after another .sp 40:    80
Vert. pos. after .sp 40 after text: 12120
$ groff -me test > /dev/null
Initial vert. pos.:                 -1
Vert. pos. after .sp 40:            84000
Vert. pos. after another .sp 40:    84000
Vert. pos. after .sp 40 after text: 96040
$ groff -ms test > /dev/null
Initial vert. pos.:                 -1
Vert. pos. after .sp 40:            72000
Vert. pos. after another .sp 40:    72000
Vert. pos. after .sp 40 after text: 84040
$ groff -mom test > /dev/null
Initial vert. pos.:                 12000
Vert. pos. after .sp 40:            12040
Vert. pos. after another .sp 40:    12080
Vert. pos. after .sp 40 after text: 24120

So it looks like -me and -ms break the .sp request in this context.

I've noticed this before under -me when .sp is issued on any new page,
not just the first, before any text is output.  You can see see this by
running the same test on two consecutive pages, via a simple alteration
to the test file:

(cat test; echo .bp; cat test) > test2