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%D \module
%D [ file=mp-func.mpiv,
%D version=2001.12.29,
%D title=\CONTEXT\ \METAPOST\ graphics,
%D subtitle=function hacks,
%D author=Hans Hagen,
%D date=\currentdate,
%D copyright={PRAGMA ADE \& \CONTEXT\ Development Team}]
%C
%C This module is part of the \CONTEXT\ macro||package and is
%C therefore copyrighted by \PRAGMA. See licen-en.pdf for
%C details.
%D Under construction.
if known context_func : endinput ; fi ;
boolean context_func ; context_func := true ;
string mfun_pathconnectors[] ;
mfun_pathconnectors[0] := "," ;
mfun_pathconnectors[1] := "--" ;
mfun_pathconnectors[2] := ".." ;
mfun_pathconnectors[3] := "..." ;
mfun_pathconnectors[4] := "---" ;
def pathconnectors = mfun_pathconnectors enddef ;
vardef mfun_function (expr f) (expr u, t, b, e, s) =
save x ; numeric x ;
for xx := b step s until e :
hide (x := xx ;)
if xx > b :
scantokens(mfun_pathconnectors[f])
fi
(scantokens(u),scantokens(t))
endfor
enddef ;
def function = mfun_function enddef ; % let doesn't work here
def straightfunction = mfun_function (1) enddef ;
def curvedfunction = mfun_function (2) enddef ;
% def punkedfunction = mfun_function (1) enddef ; % same as straightfunction
% def tightfunction = mfun_function (3) enddef ; % same as curvedfunction
vardef mfun_constructedpath (expr f) (text t) =
save ok ; boolean ok ; ok := false ;
for i=t :
if ok :
scantokens(mfun_pathconnectors[f])
else :
ok := true ;
fi
i
endfor
enddef ;
def constructedpath = mfun_constructedpath enddef ; % let doesn't work here
def straightpath = mfun_constructedpath (1) enddef ;
def curvedpath = mfun_constructedpath (2) enddef ;
def punkedpath = mfun_constructedpath (1) enddef ; % same as straightpath
def tightpath = mfun_constructedpath (3) enddef ; % same as curvedpath
vardef mfun_constructedpairs (expr f) (text p) =
save i ; i := -1 ;
forever :
exitif unknown p[incr(i)] ;
if i>0 :
scantokens(mfun_pathconnectors[f])
fi
p[i]
endfor
enddef ;
def constructedpairs = mfun_constructedpairs enddef ; % let doesn't work here
def straightpairs = mfun_constructedpairs (1) enddef ;
def curvedpairs = mfun_constructedpairs (2) enddef ;
def punkedpairs = mfun_constructedpairs (1) enddef ; % same as straightpairs
def tightpairs = mfun_constructedpairs (3) enddef ; % same as curvedpairs
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