I’ve searched the forum, but I don’t think I’m asking the right question… I’ve attached a simplified Rhino file version of what it is I’m trying to do.
I have an extruded curve normal to the surface of a sphere (grown on the surface of).
I’d like to create a V-channel which follows the maze-like line of extruded curves…
I cannot fathom how to orient the V-curve perpendicular to the first edge of each brep.
I’m still in the process of understanding lists, some YouTube videos have been helpful but I’ve not been able to extrapolate the specifics for this simple problem.
Regarding trimming, I thought I’d scale the breps from the area centroid and trim them between two surfaces and then trim the connection between each connecting face by hand.
Thank you for the response, the content is really helpful! Apologies, I should have provided more information. The idea is that the groove is normal to the surface of a sphere I’m working on.
@Joseph_Oster I’ve set the info within grasshopper so there are no legacy issues, thanks for the response.
Your Brep - sphere is not internalized so I created a sphere using the distance from origin to start point as radius.
Then I used Surface Closest Point and Evaluate Surface to properly orient the ‘V’ polyline, but that’s only at the start of the curve so fails to sweep properly. So I used discontinuity points on the curve instead of only the start point to get many sections…
I think that migt be as it was done in version 7? It was internalised. I’ve noted that if I back save a V7 as V5 and try and open it directly in something like Keyshot 10 I it doesn’t work. I have to open in in Rhino 5 and save it for it to work.
I actually had it but didn’t see it because it was obscured by the sphere and Brep on surface(which I didn’t use). Also, the ‘Data 1’ slider value was set too high, I reduced it to 4 to match @HS_Kim’s model.
I see some overlaps and places (only one?) where the sweep falls apart and doesn’t behave well but it works better than I expected with only one station curve.
Pulling the segmented Crv on surface to the sphere causes Sweep1 to break, yielding 433 results instead of four (or better yet, one) and SDiff to run very slowly.
Sorry for the late reply, I’ve been away from my computer for a few days. Pulling the curve to the surface also creates lots of smaller segments, this makes a mess of the Brep on surface walls, some become triangulated and resulting vertical edges not perpendicular to the sphere.
I found that making the extruded wall deeper than the surface of the sphere and intersecting with the sphere gave better results than pull. Then I exploded the resulting curves and rebuilt them with fewer, evenly distributed points - this seemed to solve the problem of the faceted grooves.
