This is currently 9 surfaces. I want to merge all the surfaces and then extrude a bit. But I can’t merge the corner pieces to the surface next to them. I wanted to try to smooth the corners first but if I run the smooth command, it doesn’t allow me to select the corners. Any ideas? Thanks in advance!
Hi Christine - surfacing, just the way surfaces work, does not really lend itself to this… see
https://wiki.mcneel.com/rhino/nurbssurfaces
-Pascal
It’s always good to attach a 3dm file and explain what the intended goal is.
Thanks for the response. Here’s the 3dm. I just want one smooth surface that I can extrude. deeper-macbook-air-sketch.3dm (524.6 KB)
Another way for me to do this might be the t-splines into Fusion 360. I watched a tutorial saying to export at .tsm but that extension doesn’t exist for me?
May be you should create your shape by another way to avoid those bad corners, and get clean surface.
sweep 2 with adding slash in corners is not bad in this case
deeper-macbook-air-sketch2.3dm (937.3 KB)
The MacBook Air has no G1 surface transitions, like in the model in question here. It is all proper G2, as befits Apple devices. The initial modeling approach seems wrong from the start.
Cyver, you are like a wish-granting Rhino genie. Thank you!
Did you take the top and bottom rounded rectangles and “sweep to rails” using that red curve? What does “adding slash in corners” mean?
Christine,
Add Slash is an option in sweep2 to control the flow of the surface, i made a little video, it’s more easy to understand.
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Brilliant! Thank you - super helpful!!
Hi,
Yeah its a standard corner problem, attached is my solution.
regards,
fixed corners_alvl.3dm (377.1 KB)
Look at it from the side. Also see the curvature combs. This is not a good solution. Besides, Apple’s products are built to G2 continuity.
Here’s one possibility with proper curves, G2 continuity and less complex surfaces.
deeper-macbook-air-sketch.3dm (689.6 KB)
How did you make Stephen? I tried a few of the usual suspects like NetworkSrf and Rail1 and I get very close to your solution but not exactly.
Also, do you mind sharing your script for randomly naming surfaces with male anglo-saxon names? 
You are right, I extruded the curves that were already there so spans are not where they are supposed to be for a proper-proper solution.
However the principle of trimming the flat bottom surface and having a single “connecting” surface is what I thought the problem is.
Well, that’s the trouble with you Krauts - missing the point and then getting lost in the wrong details, introducing new problems : )
The issue here was that the OP used the wrong patch layout strategy and forgot about G2. To do such a shape properly, one would need to treat the rear surface with the red curve shown below and then take it from there, as it is topologically impossible to achieve a proper G2 corner with a three-boundary surface. Besides that, the sort of elliptical curves used in the original model, as well as all our versions, have nothing to do with the MacBook Air. But that’s another issue…
Vorsprung durch technik : )
See, Herr Richard?
Monsieur Golay knows what one would have to do in the end: introduire cette courbe rouge là : )
But now - hush, to the pub, lads!
-Pascal
Vive la France!
Vive l’andouillette artisanale de Troyes!
Vive les courbes polynomiales décrites en 1962 par Pierre Beziér!