Help on Rhino, newbie

hello, I’m new to Rhino, I would like some help with a chair design, I’m having difficulty with some details.

in some parts of the drawing there are some raised parts, and I am not able to correct that.

follows the original dimensions of the model:
width 75.8cm
height 80.5cm
length 78.5cm
seating height 41.5cm
arm height 67cm

below model I’m trying to draw

chair.3dm (1.4 MB)

Thank you very much in advance

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Hi Eduardo - for one thing, I’d try to get away with fewer curves



Hi, thanks for the tip, but I still haven’t managed to get the desired result, but it’s close.

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What’s ‘the desired result’? I think @pascal is simply implying that fewer control curves will liberate the ability for Rhino to make smoother surface geometry, and therefore the ‘raised parts’ you’re having trouble with, should become much smoother with less curve density constraining them up.

I understood what @pascal suggested, I tried to apply the solution, but it didn’t work out as I expected.

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Ultimately it depends on the design intent behind the composition of curves that drive the foundation of the high compound curvature of organic shape.

You can see it’s possible to make it smoother, but the shapes that are derived from the curves are only going to be constrained in the manner the designer intends them to be.

A bystander such as myself can only look on and observe the overall design and guess onto infinity as to what the designer wants the shapes to be.

I’m guessing the designer wants the head rest to be taller… so maybe I smoothed that part too much.

Without some profile constraints, one can only guess…

I could put more time into this later, if I knew more about what the design constraint parameters are.

chair_emod.3dm (5.3 MB)

Locking down some curve shapes for a network srf process might be interesting in GH.

I basically played around with some curve networks, and smoothed out control points on UV a few times; did some rebuilding a few times, and used subD conversion a few times.

But I’m not sure how to feel about some of the deviations from the original, without knowing more about the design intent. I’m guessing there’s areas where I deviated too much.

Here again I’d use more of @pascal 's approach next time, and isolate a few curves from the original to prevent so much deviation. I guess I was being hasty and wasn’t careful enough in a few areas.

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Thank you very much, I added @pascal’s tips and yours and it worked.

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