Cut Line Segments Where They Intersect
Finds any crossing points between the line segments in a line segment pattern, and cuts the segments into pieces at these crossing-points.
selfcut.psp(A, ..., eps)
A |
Line segment pattern (object of class |
eps |
Optional. Smallest permissible length of the resulting line segments. There is a sensible default. |
... |
Ignored. |
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.
Another line segment pattern (object of class "psp")
in the same window as A with the same kind of marks as
A.
The result also has an attribute "camefrom" indicating
the provenance of each segment in the result.
For example camefrom[3]=2 means that the third segment in the
result is a piece of the second segment of A.
Adrian Baddeley Adrian.Baddeley@curtin.edu.au, Rolf Turner r.turner@auckland.ac.nz and Ege Rubak rubak@math.aau.dk.
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)))
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