Thanks a lot. This will be very helpful.
I tried processing it with metapost, but I get an error about a missing TEX file:

mpost protr.mp
This is MetaPost, version 1.209 (kpathsea version 5.1.0)
(./protr.mp (./protractor2.mp
! I can't find file `TEX'.
l.7 input TEX
             ;
Please type another input file name:

Is that "TEX" file some standard one or is it part of your library?

Vladimir

----- Цитат от Martin Budaj (m.budaj@gmail.com), на 16.10.2014 в 23:22 -----

Hi,

I'm attaching protractor source code in metapost. You can generate protractors using

mpost protr.mp

pdftex protr.tex

You can change configuration in protr.mp

The parameters mean:

- scale denominator

- length units

- angle units

- radius in the given length units

- major length marking in the given length units

- density of minor length marking

- density of minor angle marking

Martin