Generate a random pattern of line segments
obtained from the Poisson line process.
Intensity of the Poisson line process.
A positive number.
Window in which to simulate the pattern.
An object of class "owin"
or something acceptable to as.owin.
A line segment pattern (an object of class "psp").
The result also has an attribute called "lines" (an object of
class "infline" specifying the original infinite random lines)
and an attribute "linemap" (an integer vector mapping the line
segments to their parent lines).
This algorithm generates a realisation
of the uniform Poisson line process, and clips it to the window
The argument lambda must be a positive number.
It controls the intensity of the process. The expected number of
lines intersecting a convex region of the plane is equal to
lambda times the perimeter length of the region.
The expected total length of the lines crossing a region of the plane
is equal to lambda * pi times the area of the region.