I have been thinking about this problem a little differently, by comparing the length of the line-segment vector projected onto the radius in the same plane as the line-segment vector to the value of R or perhaps the reverse length (of the radius vector projected onto the line-segment), but I can't quite get beyond that starting thought.
Can anyone take my idea and tell me if it's really a good start? -- (B=) ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
