Description Usage Arguments Value Author(s) References See Also
View source: R/IntersectPoint.R
Find where point opposite segment intersects segment. It gives a proportion of AB that the orthogonal line passing through C meets. If outside (0,1) it does not pass through AB
1  IntersectPoint(A, B, C)

A 

B 

C 

returns a value which is the proportion of the length of AB
where AC
proects onto the line defined by AB. If the return value is between 0 and 1, the point is opposite the line segment. If negative, it falls on the A
side of AB
; if greater than 1, it falls to the B
side of AB
.
Shane T. Mueller and Brandon Perelman
See Mueller et al., (2016). https://sites.google.com/a/mtu.edu/mapping/
LineMagnitude
,ClosestPoint
,DistancePointSegment
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