I want to choose the 3 points that have an equal slope so that I can draw the yellow line. Can someone help me out how to choose these 3 parameticly, so I don’t want to give the exact valua of them. I want to say like: The 3 closest points should be 1 line.

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I’m not in front of Rhino, but I would do something like:

- use vector2points to get the vector (direction) from one point to the next
- compare pairs of vectors, so the 1st with the 2nd, 2nd with the third and so on. (just subtract one from the other)
- Wherever 2 are very close, so their difference is close to 0, you will know the 3 points are more or less in line

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