asymptote: Labels
3.4 Labels
==========
Adding labels is easy in 'Asymptote'; one specifies the label as a
double-quoted 'LaTeX' string, a coordinate, and an optional alignment
direction:
size(3cm);
draw(unitsquare);
label("$A$",(0,0),SW);
label("$B$",(1,0),SE);
label("$C$",(1,1),NE);
label("$D$",(0,1),NW);
[labelsquare]
'Asymptote' uses the standard compass directions 'E=(1,0)',
'N=(0,1)', 'NE=unit(N+E)', and 'ENE=unit(E+NE)', etc., which along with
the directions 'up', 'down', 'right', and 'left' are defined as pairs in
the 'Asymptote' base module 'plain' (a user who has a local variable
named 'E' may access the compass direction 'E' by prefixing it with the
name of the module where it is defined: 'plain.E').
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