Voronoi on a Trimmed Surface for an arm splint

voronoi
mesh
unhandled

(Giaco) #1

Hello,

I am trying to make a definition for reaching this goal: arm splint

Arm-voronoi.gh (38.6 KB)

I have two questions:

1- I first rebuilt a loft surface from a sequence of sections of an arm scan (stl).
Then I made some curves on surface and a cut for the thumb; as result, I have a trimmed surface.
I tried to follow some exemples on how to make a voronoi structure out of it, but I do not now how to deal with a trimmed surface.

2- Also tried to convert my trimmed surf to a mesh in order to do other stuff later, bit the conversion just selects out the faces that are insode the cut lines

Any sort of help is appreciated!! :slight_smile:


How i can make this
(Giaco) #2

…Forgot to say that I might have chosen the wrong way to make up it,
I am not an expert…

Here my definition.Arm-voronoi.gh (38.6 KB)


#3

This isn’t the whole answer, just one possible direction to follow.


Arm-voronoi_2018Apr15a.gh (43.1 KB)


#4

One of the methods I use is this.

Arm-voronoi_re.gh (54.6 KB)


(Giaco) #5

Thanks Kim!

from your method I learn something interesting on how to cope with trimmed surface; also, building closed nurbs curves from the discontinuity points is an effective way for avoiding the mess in offsetting polylines on a freeform surface, like I was trying this morning (see below)…

There is only this part grouped that I haven’t understood, could you enlighten me?

Then, I think I should clean up my surface, because at the hand level there is some useless detail that produces this weird shape:

Finally, is there a change to reach a smooth geometry following this method?

I tryied adding some WB smooth but the result is very bad (as expected, considering input topology)…

Maybe I have to work with meshes from the very beginning?

Any following suggestion is warmly welcome!!

Giac


#6

To select the trimmed surface that has the most longest edge length…

And check this mesh version with a decent topology as well.
But if I were you, I’ll just bake the final brep and add Fillet Edgesin rhino and then convert it into mesh for 3D print…

Arm-voronoi_reV2.gh (60.5 KB)


#7

More smoother mesh… and final mesh was flipped…

Arm-voronoi_reV3.gh (60.9 KB)


(Giaco) #8

Thanks a LOT Kim,

you rock! :wink: