[pstricks] how to get absolute coordinates

[Franco Bagnoli]

I'm developing an optical mark reader system, and I need to know the 
absolute position of marks on the paper. Since the placement of marks is 
left to the author, using a latex macro, I though that the best is to 
include a postscript fragment in the macro to print the absolute 
coordinates to a file. 

The only problem I have is how to convert the 'currentpoint' coordinates 
to absolute ones (i.e. the ones displayed by gv). I'm not very fluent in 
postscript, and maybe someone has the needed information at hand.

-- 
Franco Bagnoli (franchino) <bagnoli at dma.unifi.it> 
virtual location: Dipartimento di Energetica "S. Stecco"
ultra-virtual affiliation: Centro Dinamiche Complesse (CSDC-Firenze)
real location: Dip. Matematica Applicata "G. Sansone", Universita' Firenze,
Via S. Marta, 3 I-50139 Firenze, Italy. Tel. +39 0554796422, fax: +39 055471787