nom_rules_extra.mf

%% nom_rules_extra.mf

%% * (1) Copyright and License.

%%%% This file is part of the source code for Mariu, a calligraphic font, programmed in METAFONT.
%%%% Copyright (C) 2022 Laurence D. Finston

%%%% Mariu is free software; you can redistribute it and/or modify 
%%%% it under the terms of the GNU General Public License as published by 
%%%% the Free Software Foundation; either version 3 of the License, or 
%%%% (at your option) any later version.  

%%%% Mariu is distributed in the hope that it will be useful, 
%%%% but WITHOUT ANY WARRANTY; without even the implied warranty of 
%%%% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the 
%%%% GNU General Public License for more details.  

%%%% You should have received a copy of the GNU General Public License 
%%%% along with Mariu; if not, write to the Free Software 
%%%% Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA 

%%%% Please send bug reports to Laurence.Finston@gmx.de

%%%% The author can be contacted at: 

%%%% Laurence D. Finston 
%%%% Laurence.Finston@gmx.de


%This is nom_rules_extra.mf. It makes proofrules for 
% the nominal box for letters that extend beyond the borders of
% their boxes.

if unknown nom_d: nom_d = 0; fi;
if unknown extra_under_width: extra_under_width = 0; fi;
if unknown extra_over_width: extra_over_width = 0; fi;

% vertical rules:

begingroup 
save a,b;

% b divides the nominal box by b.

b = 4;
for a=0 upto b:

proofrule(((a/b)*nom_w,-nom_d),((a/b)*nom_w,nom_h));
		

% horizontal rules:
proofrule((0,(a/b)*nom_h),(nom_w,(a/b)*nom_h));

endfor;

% horizontal rules for y<0 (depth):
for a= 0 upto b:
proofrule((0,(a/b)*(-nom_d)),(nom_w,(a/b)*(-nom_d)));
endfor;


% rules for portions of letter outside of box:
% horizontals:
if extra_under_width > 0:
for a = 0 upto b:
proofrule((-3/4nom_w,(a/b)*(-nom_d)),(0,(a/b)*(-nom_d)));
endfor;
% verticals:
for a = 0 upto 3:
proofrule(((-a/b)*nom_w,-nom_d),((-a/b)*nom_w,0));
endfor;
fi;


proofrulethickness .5mm#;
proofrule((0,0),(nom_w,0));

endgroup;