Grasshopper

algorithmic modeling for Rhino

I don't want a tangent vector at the parameter but I want the perpendicular vector so that i can make lines shooting outward or inward on a 3d elipse.

Any help would be appreciated, thanks.

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Replies to This Discussion

I assume that the ellipse lies on xyPLane?
Then just take the cross product of the tangent with the worldZ-Vector.
The result will be the perpendicular Vector...
Thanks that worked well. I achieved a similar result with the curve curveture component.

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