grasshopper eats isocurves v0.gh (90.0 KB) I am using the latest R8 RC on windows 11. [image] [Bug?] Trimmed surface’s Isocurves missing at the seam position - Grasshopper - McNeel Forum

I am trying to understand the issue. To see what is happening I attached a list item component. [Schermafbeelding 2025-03-27 om 07.36.08] Now I see that the last and first isocurve are on the same place. I see that the four points you made are nicely along the Y- axis. The Iso Curve projects t…

I don’t understand, I only have two here, there should be four. May I ask what version do you use? [image]

I am macbook latest version Version 8 (8.18.25084.13002, 2025-03-25)

unnamed (27.3.2025, 15.46.41).gh (23.3 KB) Shouldn’t the Iso Curve component show something in this case? [image]

Guess this is the 0 not being 0 problem… AH… for God sake… [image]

@DanielPiker , please help me see what the cause is. I remember it was not like this in R7.

@Gijs Please help me look into this, see if this is a bug.

acts the same in Rhino 7. You need a uv point on the surface, try with the surface closest point first to get the uv point. Then this gives this in both Rhino 7 and 8: [image] grasshopper eats isocurves v0.gh (93.1 KB)

If it shows no isocurves at all, I will assume I have found the wrong component. However, the Iso Curve component shows all but two at the ends. That makes me think it was designed to display the correct isocurves but lost part of that ability after a rogue update.

Can it reliably display all but the two at the ends? If so, I would like to create a component that trims those two (retrieved from the underlying untrimmed surface) and adds them back to the rest for computational efficiency. Hi, @DavidRutten , was it designed to display all the isocurves on a trimm…

[BUG?] Trimmed surface shows fewer isocurves

Grasshopper

brian (Brian Gillespie) May 13, 2025, 11:27pm 17

RH-86991 is fixed in Rhino 8 Service Release 31

Merge surfaces (trim and untrim) sharing same edge

Sweep2 rails: edge continuity and/ or Blendsrf component

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[BUG?] Trimmed surface shows fewer isocurves

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