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%======================================================================
% This is
% pawn.mf
%
% Copyright (C) 1989-93 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.
% This is the oldest part of all my the MF-sources.
% I started Metafonting with this figure.
% ElB.
%======================================================================
%-----------------------------------------------------------
% This macro depends on some global sizes:
% thin, BottomSpace, BottomWidth, sidewith
% The values are defined as basic sizes of the Chess Characters
def PawnShape(expr wbf,hbf,wmf,hmf,wtf,htf,ibm,imt) =
%begingroup
%save wb,wm,wt,hb,hm,ht,interbm,intermt;
numeric wb,wm,wt,hb,hm,ht,interbm,intermt;
wb = BottomWidth*wbf; % width of bottom ellipse
hb = hbf*wb; % hight of bottom ellipse
wm = wmf*wb; hm = hmf*wm; % width and hight of middle ellipse
wt = wtf*wb; ht = htf*wt; % width and hight of top ellipse
interbm = ibm*thin; % amount of intersection of bottom
% and middle
intermt = imt*thin; % amount of intersection of middle
%and top
%save superb,superm,supert;
numeric superb,superm,supert;
superb=.73;
superm=.75;
supert=.73;
%save topb,topm,topt;
numeric topb,topm,topt;
topb=BottomSpace+hb;
topm=topb+hm-interbm;
topt=topm+ht-intermt;
%screenrule((0,BottomSpace),(qs,BottomSpace));
%screenrule(((qs-wb)/2,0),((qs-wb)/2,qs));
%screenrule(((qs+wb)/2,0),((qs+wb)/2,qs));
%screenrule((0,topb),(qs,topb));
%screenrule((0,topm),(qs,topm));
%screenrule((0,topt),(qs,topt));
%save bp,mp,tp;
numeric bp,mp,tp;
path bp,mp,tp,PawnPath;
%save x,y,z;
%pair z[]b,x[]b,y[]b;
%pair z[]m,x[]m,y[]m;
%pair z[]t,x[]t,y[]t;
bot rt z1b = ((qs+wb)/2, BottomSpace);
bot lft z3b = ((qs-wb)/2, BottomSpace);
bot y4b + hb = top y2b - hb = BottomSpace;
x2b = x4b = qs/2;
bp=superellipse(z1b,z2b,z3b,z4b,superb);
bp:= subpath(0,4) of bp;
rt x1m - wm/2 = lft x3m + wm/2 = qs/2;
top y2m = bot y4m + hm = topm;
y1m = y3m = (y2m+y4m)/2;
x2m = x4m = qs/2;
mp=superellipse(z1m,z2m,z3m,z4m,superm);
rt x1t - wt/2 = lft x3t + wt/2 = qs/2;
top y2t = bot y4t + ht = topt;
y1t = y3t = (y2t+y4t)/2;
x2t = x4t = qs/2;
tp=superellipse(z1t,z2t,z3t,z4t,supert);
% compute the intersectiontimes on the right side of the pawn
% The pathtimes of superellipses range from 0 to 8
%save scbr,scmbr,scmtr,sctr;
numeric scbr,scmbr,scmtr,sctr;
scbr = xpart (bp intersectiontimes (subpath(6,8)of mp));
scmbr = xpart (mp intersectiontimes (subpath(0,2)of bp));
scmtr = xpart (mp intersectiontimes (subpath(6,8)of tp));
sctr = xpart (tp intersectiontimes (subpath(0,2)of mp));
% here is a macro to mirror pathtimes of superellipses on y-axis
def mr(expr v) =
if v > 4: 12-v;
else: 4-v;
fi
enddef;
% Now the left intersectionpoints
%save scbl,scmbl,scmtl,sctl;
numeric scbl,scmbl,scmtl,sctl;
scbl = mr(scbr);
scmbl = mr(scmbr);
scmtl = mr(scmtr);
sctl = mr(sctr);
PawnPath:=subpath(0,scbr)of bp ..
subpath(scmbr,(8+scmtr)) of mp ..
subpath(sctr,8+sctl) of tp ..
subpath(scmtl,scmbl) of mp ..
subpath(scbl,4) of bp;
%endgroup
enddef;
%-----------------------------------------------------------
def MakePawnPath =
pickup chess_pen;
if unknown PawnPath:
% wb = qs - 2*sidespace; % width of bottom ellipse
% hb = hbf*wb; % hight of bottom ellipse
% wm = wmf*wb; hm = hmf*wm; % width and hight of middle
% ellipse
% wt = wtf*wb; ht = htf*wt; % width and hight of top
% ellipse
%
% wbf, hbf, ,wmf, hmf, wtf, htf, ibm, imt
%PawnShape( .80, .50, .55, .85, .3, 1.0, 2.0, 1.2);
%PawnShape( .85, .55, .60, .90, .4, 1.0, 2.0, 1.2);
PawnShape( .77, .61, .60, .84, .35, 0.95, 1.8, 1.4);
fi
enddef;
%------------------------------------------------------------
def CorrectPawnEdges =
pickup sqr;
drawdot(z1b);
drawdot(z3b);
enddef;
%-----------------------------------------------------------
%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
%------------------------------------------
def MakeWhitePawn =
pickup chess_pen;
clearit;
MakePawnPath;
draw PawnPath -- cycle;
cullit;
WhiteMan:= currentpicture;
enddef;
def MakeBlackPawn =
pickup chess_pen;
clearit;
MakePawnPath;
filldraw PawnPath -- cycle;
cullit;
BlackMan:= currentpicture;
enddef;
def MakeOuterShape =
pickup frame_pen;
clearit;
filldraw PawnPath -- cycle;
cullit;
OuterShape:= currentpicture;
enddef;
MakeWhitePawn;
MakeBlackPawn;
MakeNeutral(WhiteMan, BlackMan);
MakeOuterShape;
%===========================================================
% this one for testing
%beginchar(Pawn+White+OnBlack, qs#, qs#, 0);
% "White pawn on black field";
% MakeBlackField;
% currentpicture:= currentpicture - OuterShape;
% cullit;
% currentpicture:= currentpicture + WhiteMan;
%endchar;
%endinput
%===========================================================
beginchar(Pawn+White+OnWhite, qs#, qs#, 0);
"White pawn on white field";
currentpicture:= WhiteMan;
endchar;
beginchar(Pawn+White+OnWhite+LeftTurned, qs#, qs#, 0);
"White pawn on white field rotated to the left";
currentpicture:= TurnLeft(WhiteMan);
endchar;
beginchar(Pawn+White+OnWhite+RightTurned, qs#, qs#, 0);
"White pawn on white field rotated to the right";
currentpicture:= TurnRight(WhiteMan);
endchar;
beginchar(Pawn+White+OnWhite+UpSideDown, qs#, qs#, 0);
"White pawn on white field upside down";
currentpicture:= TurnUpSideDown(WhiteMan);
endchar;
beginchar(Pawn+Black+OnWhite, qs#, qs#, 0);
"Black pawn on white field";
currentpicture:= BlackMan;
endchar;
beginchar(Pawn+Black+OnWhite+LeftTurned, qs#, qs#, 0);
"Black pawn on white field rotated to the left";
currentpicture:= TurnLeft(BlackMan);
endchar;
beginchar(Pawn+Black+OnWhite+RightTurned, qs#, qs#, 0);
"Black pawn on white field rotated to the right";
currentpicture:= TurnRight(BlackMan);
endchar;
beginchar(Pawn+Black+OnWhite+UpSideDown, qs#, qs#, 0);
"Black pawn on white field upside down";
currentpicture:= TurnUpSideDown(BlackMan);
endchar;
beginchar(Pawn+Neutral+OnWhite, qs#, qs#, 0);
"Neutral pawn on white field";
currentpicture:= NeutralMan;
endchar;
beginchar(Pawn+Neutral+OnWhite+LeftTurned, qs#, qs#, 0);
"Neutral pawn on white field rotated to the left";
currentpicture:= TurnLeft(NeutralMan);
endchar;
beginchar(Pawn+Neutral+OnWhite+RightTurned, qs#, qs#, 0);
"Neutral pawn on white field rotated to the right";
currentpicture:= TurnRight(NeutralMan);
endchar;
beginchar(Pawn+Neutral+OnWhite+UpSideDown, qs#, qs#, 0);
"Neutral pawn on white field upside down";
currentpicture:= TurnUpSideDown(NeutralMan);
endchar;
beginchar(Pawn+White+OnBlack, qs#, qs#, 0);
"White pawn on black field";
MakeBlackField;
currentpicture:= currentpicture - OuterShape;
cullit;
currentpicture:= currentpicture + WhiteMan;
endchar;
beginchar(Pawn+White+OnBlack+LeftTurned, qs#, qs#, 0);
"White pawn on black field turned to the left";
MakeBlackField;
currentpicture:= currentpicture - TurnLeft(OuterShape);
cullit;
currentpicture:= currentpicture + TurnLeft(WhiteMan);
endchar;
beginchar(Pawn+White+OnBlack+RightTurned, qs#, qs#, 0);
"White pawn on black field turned to the right";
MakeBlackField;
currentpicture:= currentpicture - TurnRight(OuterShape);
cullit;
currentpicture:= currentpicture + TurnRight(WhiteMan);
endchar;
beginchar(Pawn+White+OnBlack+UpSideDown, qs#, qs#, 0);
"White pawn on black field upsidedown";
MakeBlackField;
currentpicture:= currentpicture - TurnUpSideDown(OuterShape);
cullit;
currentpicture:= currentpicture + TurnUpSideDown(WhiteMan);
endchar;
beginchar(Pawn+Neutral+OnBlack, qs#, qs#, 0);
"Neutral pawn on black field";
MakeBlackField;
currentpicture:= currentpicture - OuterShape;
cullit;
currentpicture:= currentpicture + NeutralMan;
endchar;
beginchar(Pawn+Neutral+OnBlack+LeftTurned, qs#, qs#, 0);
"Neutral pawn on black field turned to the left";
MakeBlackField;
currentpicture:= currentpicture - TurnLeft(OuterShape);
cullit;
currentpicture:= currentpicture + TurnLeft(NeutralMan);
endchar;
beginchar(Pawn+Neutral+OnBlack+RightTurned, qs#, qs#, 0);
"Neutral pawn on black field turned to the right";
MakeBlackField;
currentpicture:= currentpicture - TurnRight(OuterShape);
cullit;
currentpicture:= currentpicture + TurnRight(NeutralMan);
endchar;
beginchar(Pawn+Neutral+OnBlack+UpSideDown, qs#, qs#, 0);
"Neutral pawn on black field upsidedown";
MakeBlackField;
currentpicture:= currentpicture - TurnUpSideDown(OuterShape);
cullit;
currentpicture:= currentpicture + TurnUpSideDown(NeutralMan);
endchar;
beginchar(Pawn+Black+OnBlack, qs#, qs#, 0);
"Black pawn on black field";
MakeBlackField;
currentpicture:= currentpicture - OuterShape;
cullit;
currentpicture:= currentpicture + BlackMan;
endchar;
beginchar(Pawn+Black+OnBlack+LeftTurned, qs#, qs#, 0);
"Black pawn on black field turned to the left";
MakeBlackField;
currentpicture:= currentpicture - TurnLeft(OuterShape);
cullit;
currentpicture:= currentpicture + TurnLeft(BlackMan);
endchar;
beginchar(Pawn+Black+OnBlack+RightTurned, qs#, qs#, 0);
"Black pawn on black field turned to the right";
MakeBlackField;
currentpicture:= currentpicture - TurnRight(OuterShape);
cullit;
currentpicture:= currentpicture + TurnRight(BlackMan);
endchar;
beginchar(Pawn+Black+OnBlack+UpSideDown, qs#, qs#, 0);
"Black pawn on black field upsidedown";
MakeBlackField;
currentpicture:= currentpicture - TurnUpSideDown(OuterShape);
cullit;
currentpicture:= currentpicture + TurnUpSideDown(BlackMan);
endchar;
|
