labelpath ¶This module uses the PSTricks pstextpath macro to fit labels
along a path (properly kerned, as illustrated in the example file
curvedlabel.asy), using the command
void labelpath(picture pic=currentpicture, Label L, path g,
string justify=Centered, pen p=currentpen);
Here justify is one of LeftJustified, Centered, or
RightJustified. The x component of a shift transform
applied to the Label is interpreted as a shift along the curve, whereas
the y component is interpreted as a shift away from the curve.
All other Label transforms are ignored. This module requires the
latex tex engine and inherits the limitations of the
PSTricks \pstextpath macro.