The draws curves in the standard LaTeX picture environment
using parabolas between data points with continuous slope at
joins; for circles and arcs, it uses up to 16 parabolas. The
package also draws symbols or dash patterns along curves. The
package provides facilities equivalent to technical pens with
compasses and French curves. Curves consist of short secants
drawn by overlapping disks or line-drawing \special commands
selected by package options.
