Take a look at: http://sepwww.stanford.edu/software/ratfor.html
and in particular the link there to the original paper by Brian
Kernighan describing ratfor; it is only 14 pages, but it is a model
of clarity of exposition and design.
I wouldn't worry too much about the makefile -- it probably
kno
I'm testing some different formulations of pairwise interaction point processes
in Spatstat (version 1.11-6) using R 2.5.0 on a Windows platform and I wish to
simulate them using the Metropolis-Hastings algorithm implemented with Spatstat.
Spatstat utilizes Fortran77 code with the preprocessor RatF