info/examples/lgc2/4-2-15.mp


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% --- start of displayed preamble in the book ---

% --- end of displayed preamble in the book ---
defaultfont:="ptmr8r";
warningcheck:=0;
beginfig(1)
numeric u; u=5mm;
for i:=0 step 10 until 350:
  draw ((i/360)*10u,3u*sind(i))--
       (((i+10)/360)*10u,3u*sind(i+10));
endfor;
endfig;
end;