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+%D \module
+%D [ file=mp-symb.mp,
+%D version=very old,
+%D title=\CONTEXT\ \METAPOST\ graphics,
+%D subtitle=navigation symbol macros,
+%D author=Hans Hagen,
+%D date=\currentdate,
+%D copyright={PRAGMA / Hans Hagen \& Ton Otten}]
+%C
+%C This module is part of the \CONTEXT\ macro||package and is
+%C therefore copyrighted by \PRAGMA. See mreadme.pdf for
+%C details.
+
+%D Instead of these symbols, you can use the \type {contnav}
+%D font by Taco Hoekwater that is derived form this file.
+
+u := 3;
+h := 5u;
+wt := 5u;
+wb := .25wt;
+o := .1u;
+pw := .5u;
+
+drawoptions (withpen pencircle scaled pw);
+
+path lefttriangle, righttriangle, sublefttriangle, subrighttriangle;
+
+pair s ; s = (2wb,0) ;
+
+x1t = x2t = 0;
+x3t = wt;
+y3t = .5h;
+z1t-z2t = (z3t-z2t) rotated 60;
+
+z4t = (z2t--z3t) intersectionpoint ((z1t--z2t) shifted s) ;
+z5t = (z3t--z1t) intersectionpoint ((z1t--z2t) shifted s) ;
+
+righttriangle = z1t--z2t--z3t--cycle;
+lefttriangle = righttriangle rotatedaround((0,.5h), 180) shifted (wt,0);
+
+subrighttriangle = z4t--((z2t--z3t--z1t) shifted s)--z5t ;
+sublefttriangle = subrighttriangle rotatedaround((0,.5h), 180) shifted (wt,0);
+
+path sidebar;
+
+x1b = x4b = 0;
+x2b = x3b = wb;
+y1b = y2b = y1t;
+y3b = y4b = y2t;
+
+sidebar = z1b--z2b--z3b--z4b--cycle;
+
+path midbar, onebar, twobar;
+
+hh = abs(y1t-y2t);
+
+%midbar := unitsquare scaled 2hh/3;
+midbar := unitsquare scaled hh;
+onebar := unitsquare xscaled (hh/3) yscaled hh;
+twobar := onebar;
+
+def prepareglyph =
+ drawoptions (withpen pencircle scaled .5u);
+enddef;
+
+def finishglyph =
+ set_outer_boundingbox currentpicture;
+ bboxmargin := o;
+ setbounds currentpicture to bbox currentpicture;
+% draw boundingbox currentpicture withcolor red withpen pencircle scaled 1;
+enddef;
+
+beginfig (1);
+ prepareglyph;
+ fill lefttriangle;
+ draw lefttriangle; % draw gets the bbox right, filldraw doesn't
+ finishglyph;
+endfig;
+
+beginfig (2);
+ prepareglyph;
+ fill righttriangle;
+ draw righttriangle;
+ finishglyph;
+endfig;
+
+beginfig (3);
+ prepareglyph;
+ fill sidebar;
+ draw sidebar;
+ fill lefttriangle shifted (.5s);
+ draw lefttriangle shifted (.5s);
+ finishglyph;
+endfig;
+
+beginfig (4);
+ prepareglyph;
+ fill righttriangle;
+ draw righttriangle;
+ fill sidebar shifted (wt,0);
+ draw sidebar shifted (wt,0);
+ finishglyph;
+endfig;
+
+beginfig (5);
+ prepareglyph;
+ fill lefttriangle;
+ draw lefttriangle;
+ fill lefttriangle shifted s;
+ draw lefttriangle shifted s;
+ finishglyph;
+endfig;
+
+beginfig (6);
+ prepareglyph;
+ fill righttriangle;
+ draw righttriangle;
+ fill righttriangle shifted s;
+ draw righttriangle shifted s;
+ finishglyph;
+endfig;
+
+beginfig (7);
+ prepareglyph;
+ fill midbar;
+ draw midbar;
+ finishglyph;
+endfig;
+
+beginfig (8);
+ prepareglyph;
+ fill onebar;
+ draw onebar;
+ finishglyph;
+endfig;
+
+beginfig (9);
+ prepareglyph;
+ fill twobar;
+ draw twobar;
+ fill twobar shifted (pw+hh/2,0);
+ draw twobar shifted (pw+hh/2,0);
+ finishglyph;
+endfig;
+
+beginfig(101);
+ prepareglyph;
+ draw lefttriangle;
+ finishglyph;
+endfig;
+
+beginfig(102);
+ prepareglyph;
+ draw righttriangle;
+ finishglyph;
+endfig;
+
+beginfig(103);
+ prepareglyph;
+ draw sidebar;
+ draw lefttriangle shifted (.5s);
+ finishglyph;
+endfig;
+
+beginfig(104);
+ prepareglyph;
+ draw righttriangle;
+ draw sidebar shifted (wt,0);
+ finishglyph;
+endfig;
+
+beginfig(105);
+ prepareglyph;
+ draw lefttriangle;
+ draw lefttriangle shifted s;
+ finishglyph;
+endfig;
+
+beginfig(106);
+ prepareglyph;
+ draw righttriangle;
+ draw righttriangle shifted s;
+ finishglyph;
+endfig;
+
+beginfig(107);
+ prepareglyph;
+ draw midbar;
+ finishglyph;
+endfig;
+
+beginfig(108);
+ prepareglyph;
+ draw onebar;
+ finishglyph;
+endfig;
+
+beginfig(109);
+ prepareglyph;
+ draw twobar;
+ draw twobar shifted (pw+hh/2,0);
+ finishglyph;
+endfig;
+
+beginfig(201);
+ prepareglyph;
+ draw lefttriangle;
+ finishglyph;
+endfig;
+
+beginfig(202);
+ prepareglyph;
+ draw righttriangle;
+ finishglyph;
+endfig;
+
+beginfig(203);
+ prepareglyph;
+ draw sidebar;
+ draw lefttriangle shifted (.5s);
+ finishglyph;
+endfig;
+
+beginfig(204);
+ prepareglyph;
+ draw righttriangle;
+ draw sidebar shifted (wt,0);
+ finishglyph;
+endfig;
+
+beginfig(205);
+ prepareglyph;
+ draw sublefttriangle shifted s;
+ draw lefttriangle shifted s;
+ finishglyph;
+endfig;
+
+beginfig(206);
+ prepareglyph;
+ draw subrighttriangle;
+ draw righttriangle;
+ finishglyph;
+endfig;
+
+beginfig(207);
+ prepareglyph;
+ draw midbar;
+ finishglyph;
+endfig;
+
+beginfig(208);
+ prepareglyph;
+ draw onebar;
+ finishglyph;
+endfig;
+
+beginfig(209);
+ prepareglyph;
+ draw twobar;
+ draw twobar shifted (pw+hh/2,0);
+ finishglyph;
+endfig;
+
+
+beginfig(999);
+
+picture collection [] ;
+
+prepareglyph ;
+draw lefttriangle ;
+finishglyph ;
+collection[201] := currentpicture ;
+currentpicture := nullpicture ;
+
+prepareglyph ;
+draw righttriangle ;
+finishglyph ;
+collection[202] := currentpicture ;
+currentpicture := nullpicture ;
+
+prepareglyph ;
+draw sidebar ;
+draw lefttriangle shifted (.5s) ;
+finishglyph ;
+collection[203] := currentpicture ;
+currentpicture := nullpicture ;
+
+prepareglyph ;
+draw righttriangle ;
+draw sidebar shifted (wt,0) ;
+finishglyph ;
+collection[204] := currentpicture ;
+currentpicture := nullpicture ;
+
+prepareglyph ;
+draw sublefttriangle shifted s ;
+draw lefttriangle shifted s ;
+finishglyph ;
+collection[205] := currentpicture ;
+currentpicture := nullpicture ;
+
+prepareglyph ;
+draw subrighttriangle ;
+draw righttriangle ;
+finishglyph ;
+collection[206] := currentpicture ;
+currentpicture := nullpicture ;
+
+prepareglyph ;
+draw midbar ;
+finishglyph ;
+collection[207] := currentpicture ;
+currentpicture := nullpicture ;
+
+prepareglyph ;
+draw onebar ;
+finishglyph ;
+collection[208] := currentpicture ;
+currentpicture := nullpicture ;
+
+prepareglyph ;
+draw twobar ;
+draw twobar shifted (pw+hh/2,0) ;
+finishglyph ;
+collection[209] := currentpicture ;
+currentpicture := nullpicture ;
+
+for i=201 upto 209 :
+ collection[i] := collection[i] shifted - center collection[i] ;
+endfor ;
+
+addto currentpicture also collection[205] shifted ( 0, 0)
+ withcolor (.3,.4,.5) ;
+addto currentpicture also collection[202] shifted ( 0,1.5h)
+ withcolor (.5,.6,.7) ;
+addto currentpicture also collection[201] shifted (1.5h, 0)
+ withcolor (.6,.7,.8) ;
+addto currentpicture also collection[206] shifted (1.5h,1.5h)
+ withcolor (.4,.5,.6) ;
+
+collection[210] := currentpicture ;
+currentpicture := nullpicture ;
+
+bboxmargin := .25u;
+
+fill bbox collection[210] withcolor .95(1,1,0);
+addto currentpicture also collection[210] ;
+
+endfig ;
+
+end