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%======================================================================
% This is
% equi.mf
%
% Copyright (C) 1995 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.
%======================================================================
%
% 11 _______________________ 12
% \ /
% \ /
% \ /
% 9 \---------------/ 10
% \ /
% \ /
% \ /
% \ /
% \ /
% \ /
% 7 +-------------+ 8 -
% |<---wdbar--->| | htbar
% 5 +-------------+ 6 -
% / \
% / \
% / \
% / \
% / \
% / \
% / \
% 3 /-----------------\ 4
% / \
% / \
% 1 ----------------------- 2
% |<--------wdbot-------->|
%
def SetParam =
numeric wdbott, wdbar, htbar, diagpos, rdiagpos;
wdbott:= .75 BottomWidth;
wdbar:= .50 BottomWidth;
htbar:= 0.065*(qs - BottomSpace - TopSpace);
diagpos=.095;
rdiagpos= 1-diagpos;
enddef;
def DefinePointsAndPaths =
% left points are odd numbered from 1 to 11 from lower to upper
% right points are even numbered from 2 to 12 lower tot upper
numeric x[], y[];
SetParam;
% At first the diag's
rt x1 = rt x11 = .5(qs-wdbott);
lft x2 = lft x12 = .5(qs+wdbott);
bot y1 = bot y2 = BottomSpace;
top y11 = top y12 = qs-TopSpace;
z0 = (.5qs, .5qs);
path shape; shape:= z1--z0--z11--z12--z0--z2--z1--cycle;
% now the top and bottom inner rule
path Ndiag; Ndiag= z2--z11;
path Zdiag; Zdiag= z12--z1;
z4 = point diagpos of Ndiag;
z3 = point rdiagpos of Zdiag;
z9 = point rdiagpos of Ndiag;
z10 = point diagpos of Zdiag;
path botin; botin= z3--z4;
path topin; topin= z9--z10;
% the bar in the middle
y7 - y5 = y8 - y6 = htbar;
x6 - x5 = x8 - x7 = wdbar;
x7 + x8 = x5 + x6 = qs;
y5 + y7 = y8 + y6 = qs;
path bar; bar=z5--z6--z8--z7--z5--cycle;
enddef;
def MakeWhiteEquihopper =
clearit;
pickup chess_pen;
draw shape;
pickup inner_pen;
draw topin;
draw botin;
erase fill bar;
draw bar;
WhiteMan:= currentpicture;
enddef;
def MakeBlackEquihopper =
clearit;
pickup chess_pen;
filldraw shape;
pickup chess_pen scaled 1.1;
undraw ShortenPath(topin, 2.5thin);
undraw ShortenPath(botin, 2.5thin);
filldraw bar;
BlackMan:= currentpicture;
enddef;
def MakeOuterShape =
clearit;
pickup frame_pen;
filldraw shape;
filldraw bar;
cullit;
OuterShape:= currentpicture;
enddef;
DefinePointsAndPaths;
MakeWhiteEquihopper;
MakeBlackEquihopper;
MakeNeutral(WhiteMan, BlackMan);
MakeOuterShape;
if proofing > 0:
ScreenGrid(0,qs)(0,qs);
% If you want a stop after each generated char:
%let _endchar= endchar;
%def endchar =
% string ans;
% ans= readstring;
% _endchar;
%enddef;
fi;
%%===========================================================
%% this one for testing
%beginchar(Equihopper+White+OnWhite, qs#, qs#, 0);
% "White Equihopper on white field";
% currentpicture:= WhiteMan;
% %currentpicture:= BlackMan;
%endchar;
%endinput
%%===========================================================
beginchar(Equihopper+White+OnWhite, qs#, qs#, 0);
"White equihopper on white field";
currentpicture:= WhiteMan;
endchar;
beginchar(Equihopper+White+OnWhite+LeftTurned, qs#, qs#, 0);
"White equihopper turned to the left on white field";
currentpicture:= TurnLeft(WhiteMan);
endchar;
%===========================================================
beginchar(Equihopper+White+OnBlack, qs#, qs#, 0);
"White equihopper on black field";
MakeBlackField;
cullit;
currentpicture:= currentpicture - OuterShape;
cullit;
currentpicture:= currentpicture + WhiteMan;
endchar;
beginchar(Equihopper+White+OnBlack+LeftTurned, qs#, qs#, 0);
"White equihopper turned to the left on black field";
MakeBlackField;
cullit;
currentpicture:= currentpicture - TurnLeft(OuterShape);
cullit;
currentpicture:= currentpicture + TurnLeft(WhiteMan);
endchar;
%===========================================================
beginchar(Equihopper+Neutral+OnWhite, qs#, qs#, 0);
"Neutral equihopper on white field";
currentpicture:= NeutralMan;
endchar;
beginchar(Equihopper+Neutral+OnWhite+LeftTurned, qs#, qs#, 0);
"Neutral equihopper turned to the left on white field";
currentpicture:= TurnLeft(NeutralMan);
endchar;
%===========================================================
beginchar(Equihopper+Neutral+OnBlack, qs#, qs#, 0);
"Neutral equihopper on black field";
MakeBlackField;
cullit;
currentpicture:= currentpicture - OuterShape;
cullit;
currentpicture:= currentpicture + NeutralMan;
endchar;
beginchar(Equihopper+Neutral+OnBlack+LeftTurned, qs#, qs#, 0);
"Neutral equihopper turned to the left on black field";
MakeBlackField;
cullit;
currentpicture:= currentpicture - TurnLeft(OuterShape);
cullit;
currentpicture:= currentpicture + TurnLeft(NeutralMan);
endchar;
%===========================================================
beginchar(Equihopper+Black+OnWhite, qs#, qs#, 0);
"Black equihopper on white field";
currentpicture:= BlackMan;
endchar;
beginchar(Equihopper+Black+OnWhite+LeftTurned, qs#, qs#, 0);
"Black equihopper turned to the left on white field";
currentpicture:= TurnLeft(BlackMan);
endchar;
%===========================================================
beginchar(Equihopper+Black+OnBlack, qs#, qs#, 0);
"Black equihopper on black field";
MakeBlackField;
cullit;
currentpicture:= currentpicture - OuterShape;
cullit;
currentpicture:= currentpicture + BlackMan;
endchar;
beginchar(Equihopper+Black+OnBlack+LeftTurned, qs#, qs#, 0);
"Black equihopper turned to the left on black field";
MakeBlackField;
cullit;
currentpicture:= currentpicture - TurnLeft(OuterShape);
cullit;
currentpicture:= currentpicture + TurnLeft(BlackMan);
endchar;
endinput
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