The labels in the previous examples were made by using the functions
Point::dotlabel(), which make it
possible to include TeX text in a drawing.
string arguments for
the text of the label and the position of the label with respect to the
Point. The label text is formatted using TeX, so it can contain
math mode material between dollar signs. Please note that double backslashes
must be used, where a single backslash would suffice in a file of
MetaPost code, for example, for TeX control sequences.
short argument can be used for the label.
The position argument is optional, with
"top" as the default. If
"" is used, the label will centered about
Point itself. This will usually only make sense for
label(), because it would otherwise interfere with the dot.
Valid arguments for the
position are the same as in MetaPost:
"ulft" (upper left),
"urt" (upper right),
"llft" (lower left), and
"lrt" (lower right).
Point p0; Point p1(1); Point p2(2); Point p3(p0); Point p4(p1); Point p5(p2); p3 *= p4 *= p5.shift(0, 1); p0.draw(p1); p1.draw(p2); p2.draw(p5); p5.draw(p4); p4.draw(p3); p3.draw(p0); p0.label($p_0$, ""); p1.dotlabel(1); p2.dotlabel("p2", "bot"); p3.dotlabel("This is $p_3$", "lft"); p4.label(4); p5.label("$\\leftarrow p_5$", "rt");
For complete descriptions of
Point::dotlabel(), see Points; Labelling.