In addition to the ordinary (plain) style, all curve primitives and
plots can be drawn in dashed, dotted, or bold styles, by prepending
dash
, dot
, or bold
to the object's name. Dotted
and dashed graphs may look better when plotted adaptively. Bold
dashed/dotted plots are obtained by constructions such as
bold(); dashline(P(0,0), P(2,1)); end_bold();
All input coordinates are Cartesian, and are of type double.