🚀 go-pugleaf

Earlier today I wrote complaining about using metric measurements in xfig:

>>>>> On Wed, 18 Nov 1992 00:27:44 GMT, jrm@beta.ma.adfa.oz.au (John R Marley) said:
> .. stuff about xfig ...
> All figures drawn with metric dimensions come out shrunk by 0.95.  This is
> ... more stuff ...

> If I get fed up enough I might have another go...  But until then, does anyone
> know how to fix this?

OK, I got fed up enough to discover the cause.  It's because xfig decided to
use 80 pixels per inch, and to use integers to keep track of coordinates.  Now
to calculate pixels per cm, you do 80/2.54 == 31.4961, which is not an integer.
xfig chose to use 30 instead because it is an integer and it's a multiple of
five (which is necessary to make the ruler tick marks work).  Now, 30 is
smaller than 31.4961, but by how much?  30/31.4961 == 0.9525, which is very
close to the 0.95 I mentioned before.  Voila!  Qed.

Now I know why, but I don't know how to fix it.  I could try changing pixels
per inch to 76 (assuming pix/cm = 30, pix/in = 76.2) and not use imperial and
see what I get.  Presumably, all dimensions should now be scaled by 0.9974
(76/76.2) which is pretty close to 1.0 .

> Thanks in advance,

Anytime! 8^)

Oh, if anyone has a better solution, please let me know!  Thanks.

--
Trust in the LORD with all your heart and    |  John Marley
lean not on your own understanding; in all  -+- j-marley@adfa.edu.au
your ways acknowledge him, and He will make  |  Programmer & Sys Admin
your paths straight.   - Proverbs 3:5-6      |  A.D.F.A. Maths Dept.