selfcut.psp: Cut Line Segments Where They Intersect
Description
Finds any crossing points between the line segments in a
line segment pattern, and cuts the segments into pieces
at these crossing-points.
Usage
selfcut.psp(A, ..., eps)
Arguments
A
Line segment pattern (object of class "psp").
eps
Optional. Smallest permissible length of the resulting
line segments. There is a sensible default.
...
Ignored.
Value
Another line segment pattern (object of class "psp")
in the same window as A with the same kind of marks as A.
Details
This function finds any crossing points between
different line segments in the line segment pattern A,
and cuts the line segments into pieces at these intersection points.
A crossing point occurs whenever one of the line segments in A
intersects another line segment in A, at a nonzero
angle of intersection.
X <- psp(runif(10), runif(10), runif(10), runif(10), window=owin())
Y <- selfcut.psp(X)
n <- nsegments(Y)
plot(Y %mark% factor(sample(seq_len(n), n, replace=TRUE)))