Given a spatial pattern of line segments, extrapolate the segments to infinite lines.
Spatial pattern of line segments (object of class
Each line segment in the pattern
extrapolated to an infinite line, drawn through its two endpoints.
The resulting pattern of infinite lines
is returned as an object of class
If a segment's endpoints are identical (so that it has zero length) the resulting infinite line is vertical (i.e. parallel to the y coordinate axis).
An object of class
"infline" representing the pattern of
infinite lines. See
infline for details of
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