🚀 go-pugleaf

[Question: how to create a matrix of dots?]

You *should* be able to use a dashed line for this, since PostScript
gives you a lot of control over the dash pattern.  For example, the
following sets up the pattern you described (4 dots 5 mm apart--I've
assumed .1 mm wide--and then a 10 mm space) and starting at a point
1" up from the bottom of the page and 1" in from the left margin,
prints a grid:

72 25.4 div dup scale % user units are now millimeters
.1 setlinewidth
[.1 4.9 .1 4.9 .1 4.9 .1 9.9 ] 0 setdash
25.4 dup translate

0 -5 translate % we don't get a line at zero

0 5 250 {
    dup 25 mod 0 eq 
    {
	pop
    }{	
	0 exch moveto 200 0 rlineto stroke
    } ifelse
} for


This prints in no time flat on my SPARCprinter.

-- Rich
--
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Richard.Berlin@Eng.Sun.COM   |   The significant problems we face cannot be
			     |   solved at the same level of thinking we were
			     |   at when we created them.  -- Albert Einstein