Curve side inaccuracies?

Grasshopper
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1

I ran into the situation where the Curve Side component outputs a number other than 0 (coincident) for a midpoint of a curve.

afbeelding
afbeelding1642×827 81.7 KB

In the image above, there is only a single curve in each branch, so its midpoint should result in a 0, but there are plenty of -1 or 1s.

So to actually resolve which curve is left or right facing, I have to combine the data from two curves and two Curve Side components, in the hope that the two components together don’t have a failure in the same data branch:

afbeelding
afbeelding1920×746 88.1 KB

This method works for this particular input, but I can’t be certain that it will always work.

I just need to know which of the two offset curves is on the left or right relative to the other, but when the Curve Side component fails to output two different numbers, that’s not possible.
Curve side failure.gh (26.2 KB)
Curve side failure.3dm (56.9 KB)

2

I think this is a tolerance issue.

image
image2390×1131 187 KB

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3

In the cases as in the picture, I usually join and break. It will order them all. Probably this is the simplest solution.

5

Then the solution is actually much simpler:

afbeelding
afbeelding3189×1134 335 KB

Curve side failure_re.gh (10.8 KB)

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