Light-like projection of curves onto a plane blocked by brep

Hey there,

I have 2 problems with curves projection which I could not figure out a solution. Would appreciate if someone could help me out with one or both (Grasshopper solution preferred, if possible):

1.) Is there a way to do a project curves onto a plane using “obstacles” in the way which block/consume the curves like if it was light?

What I mean is something like that:

What I am actually interested in is the curves on the plane - so not getting the curves on the blocking cone would be ok:

project.3dm (246.9 KB)

2.) When a closed curve (here in yellow) is projected onto a plane it also produces a closed curve (the blue curve). Is there a way to only get the “visible” open curve - as it looks like:

Untitled.3dm (55.6 KB)

Any hint to existing previous posts also appreciated.

hi @ore

AFAIK there are no such options. I’ll make YT’s to log these as new requests:

RH-85437 project ‘once’
RH-85438 Project to Open curve

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