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% This is
% geo.mf
%
% Copyright (C) 1989-92 by Elmar Bartel.
%
% This program 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 1, or (at your option)
% any later version.
%
% This program 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 this program; if not, write to the Free Software
% Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
%
%
%we have to define six essential characters:
% WoW NoW BoW WoB NoB BoB
%Pawn 0 6 12 18 24 30
%Knight 1 7 13 19 25 31
%Bishop 2 8 14 20 26 32
%Rook 3 9 15 21 27 33
%Queen 4 10 16 22 28 34
%King 5 11 17 23 29 35
% All these cases are repeated three more times:
% Left turned, Right turned and upside down
%------------------------------------------
% From this result the first free positions
% usable for simple geometric signs.
def MakeCirclePath =
path CirclePath;
CirclePath = fullcircle scaled .70qs shifted Center;
enddef;
def MakeWhiteCircle =
pickup chess_pen;
clearit;
draw CirclePath;
cullit;
WhiteMan:= currentpicture;
enddef;
def MakeBlackCircle =
pickup chess_pen;
clearit;
filldraw CirclePath;
cullit;
BlackMan:= currentpicture;
enddef;
def MakeOuterShape =
pickup frame_pen;
clearit;
filldraw CirclePath;
cullit;
OuterShape:= currentpicture;
enddef;
MakeCirclePath;
MakeWhiteCircle;
MakeBlackCircle;
MakeNeutral(WhiteMan, BlackMan);
MakeOuterShape;
beginchar(Circle+White+OnWhite, qs#, qs#, 0);
"White circle on white field";
currentpicture:= WhiteMan;
endchar;
beginchar(Circle+Black+OnWhite, qs#, qs#, 0);
"Black circle on white field";
currentpicture:= BlackMan;
endchar;
beginchar(Circle+Neutral+OnWhite, qs#, qs#, 0);
"Neutral circle on white field";
currentpicture:= NeutralMan;
endchar;
beginchar(Circle+White+OnBlack, qs#, qs#, 0);
"White circle on black field";
MakeBlackField;
currentpicture:= currentpicture - OuterShape;
cullit;
currentpicture:= currentpicture + WhiteMan;
endchar;
beginchar(Circle+Neutral+OnBlack, qs#, qs#, 0);
"Neutral circle on black field";
MakeBlackField;
currentpicture:= currentpicture - OuterShape;
cullit;
currentpicture:= currentpicture + NeutralMan;
endchar;
beginchar(Circle+Black+OnBlack, qs#, qs#, 0);
"Black circle on black field";
MakeBlackField;
currentpicture:= currentpicture - OuterShape;
cullit;
currentpicture:= currentpicture + BlackMan;
endchar;
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