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% thearchicon.mp
% L. Nobre G.
% 2002
%input featpost3Dplus2D;
f := 0.8*(6,3,4);
beginfig(1);
color tracecol, lockcol;
numeric altura, compri, radius, altfrac, comfrac, radang;
path theside, thefront, thelocka, thelockb, thelock;
color poi[];
numeric numpl, aux, i;
altura = 1;
compri = 2;
radius = 0.8;
altfrac = 0.2;
comfrac = 0.15;
radang = 37;
numpl = 9;
tracecol = blue;
lockcol = black;
currentpen := pencircle scaled 3mm;
drawoptions( withcolor tracecol );
rigorousdisc( 0, true, (-0.5compri,0,0), radius, (compri,0,0) );
poi1 = (0.5compri,-radius,0);
poi2 = (0.5compri,radius,0);
poi3 = (-0.5compri,radius,0);
poi4 = (0.5compri,-radius,-altura);
poi5 = (0.5compri,radius,-altura);
poi6 = (-0.5compri,radius,-altura);
theside = rp(poi1)--rp(poi2)--rp(poi5)--rp(poi4)--cycle;
thefront= rp(poi2)--rp(poi3)--rp(poi6)--rp(poi5)--cycle;
drawoptions( withcolor background );
fill theside;
fill thefront;
thelocka = rp((comfrac*compri,radius,-altfrac*altura))
--rp((comfrac*compri,radius,0));
thelockb = rp((-comfrac*compri,radius,-altfrac*altura))
--rp((-comfrac*compri,radius,0));
for i=1 upto numpl:
aux := i*radang/numpl;
poi7 := (comfrac*compri,radius*cosd(aux),radius*sind(aux));
poi8 := (-comfrac*compri,radius*cosd(aux),radius*sind(aux));
thelocka := thelocka...rp(poi7);
thelockb := thelockb...rp(poi8);
endfor;
thelock = thelocka--reverse thelockb--cycle;
drawoptions( withcolor lockcol );
filldraw thelock;
drawoptions( withcolor tracecol );
draw theside;
draw thefront;
endfig;
end;
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