Re: undiagnosed pic error

[Douglas McIlroy]

> I understand that groff has the \D escape which
> allows you, among other things, to draw outline
> and filled polygons.

Very helpful. I rely on the old testament book of
Ossanna and on groff(7), neither of which cover
that option for \D. One must look in "info groff". I
hope Branden's extensive edits to groff(7) for 1.23
may correct my myopia.

I could use \D'P by editing it into the output of pic, which
is probably easier than what I have done before: Fill
a right triangle by creating a filled box in pic and delete
one corner by editing the PostScript. Then a polygon
can be filled by decomposing it into right triangles and
rectangles.

Given groff's \D, it should be easy to add polygon support to
pic. Only ignorance of git deters me from doing it myself.

Doug