A third variant of the plf command is plfp, which plots an arbitrary list of filled polygons; it is not limited to quadrilaterals. While pli is a special case of plf, plfp is a generalization of plf:

plfp, z, y, x, n |

Here z is the list of colors, and x and y the coordinates of the corners
of the polygons. The fourth argument n is a list of the number of
corners (or sides) for each successive polygon in the list. All four
arguments are now one dimensional arrays; the length of z and n is the
number of polygons, while the length of x and y is the total number of
corners, which is `sum(n)`. Again, plfp draws the polygons in the
order of the z (or n) array.

As a special case, if all of the lengths n after the first are 1, the
first polygon coordinates are taken to be in NDC units, and the
remaining single points are used as offsets to plot `numberof(n)-1`
copies of this polygon. This arcane feature is necessary for the plmk
function.

As of yorick 1.5, z may also be a 3 by `sum(n)` array of type char
in order to make a true color filled mesh. The first index of z is
(red, green, blue), with 0 minimum intensity and 255 maximum.