topic Re: Mesh shell and modeling on uneven surface in Fusion Design, Validate & Document Forum

Mesh shell and modeling on uneven surface

Anonymous — Thu, 09 Jan 2020 14:20:17 GMT

Hello,

I am completely new to modeling (level: watched tons of videos and tried to model something simple). Now I am having challenge: make model around my 3D scanned hand.

First, what I need is create socket around hand (which is imported mesh obv) and the question is: is there a tool which allows to do it simply? I think the right term for it is "to shell model".

Second, I want this socket must have some pattern, hexagonal for example.

Third, I want to model further on uneven surface (on a socket which is around hand). Any advices and best practices here would be much appreciated.

What I am willing to get is:

-solution if its simple and wouldn't take much time

-links to learning sources so I will figure out myself

-keywords for me to google so I will figure out myself

-best practices in general, so I will make hopefully less stupid moves 🙂

Regarding videos and sources, they are great now I can model simple stuff like chair, etc. But I am stuck when trying to do something specific for my case, thats why asking for help here.

Also I feel that this thread futher researchers in future 🙂

Hand file: https://drive.google.com/file/d/1dRwRV82yzIiScz_WcPxylNic54dSWQGQ/view?usp=sharing (can't attach)

Thanks in advance.

Re: Mesh shell and modeling on uneven surface

TrippyLighting — Thu, 09 Jan 2020 18:18:10 GMT

@Anonymous wrote:

Hello,

I am completely new to modeling (level: watched tons of videos and tried to model something simple). Now I am having challenge: make model around my 3D scanned hand.

I can possibly show you a relatively simple way to get you hand model re-meshed, but depending on what you want to do with it this might not be the best way to handle this.

What is it you want to do with the resulting model ?

For the first part of this I would not use Fusion 360. The scanned 50MB file contains a triangulated mesh with over 1 million polygons. There's not much you can do with that in Fusion 360. Some folks will suggest to start creating a T-Spline and snap the T-Spline vertices to the mesh, but that's just silly!

There are much better methods and tools available.

You can re-mesh that very dense triangulated mesh into much less dense quad mesh retaining most of the detail. This then can be imported into Fusion 360 and converted into a T-Spline. Before you do that, however you should probably clean up the edges and make sure you don't have spurious and individual dislocated vertices so the re-mesher works properly.
That is something you might attempt in Meshmixer or Blender.

Once the mesh is cleaned up you can re-mesh it with Autodesk Re-Cap or my preference Instant Meshes.

Another method, which however, requires a good bit of skill is to re-topologize that mesh with tools such as TopoGun or the Blender plugin Retopoflow.

All the above will or should result in a quad mesh. That quad mesh can be imported into Fusion 360 and converted into a T-Spline.

This isn't for the faint of heart, but if you have the perseverance to stick with it, we'll be here to help you along.

This tutorial describes some of this:

Re: Mesh shell and modeling on uneven surface

Anonymous — Thu, 09 Jan 2020 20:35:22 GMT

Hey,

Big Thank You for the answer. I will review it and try to apply steps without the faint of a heart 🙂

Meanwhile answering to your question:

>What is it you want to do with the resulting model ?

I want to model socket around hand and then bionic device prototype on top of it (place for engine place, battery, etc.), so I want somehow to keep 3D scanned dimensions for hand also.

Re: Mesh shell and modeling on uneven surface

Anonymous — Mon, 13 Jan 2020 13:45:12 GMT

Thank you again and that was pretty easy.

As I said, my goal is to model socket around hand and then bionic device prototype on top of it (want to create place for engine, place for battery, etc.).

I solved first problem - importing 3d scanned object, next I need to solve prolems:

1 - how to make socket around hand (wrap hand with some solid with offset). Also how to make pattern on this solid.

2 - how to model on resulting solid (socket I created). It's round and uneven surface, would be appreciate for tips here 🙂

Re: Mesh shell and modeling on uneven surface

Anonymous — Wed, 15 Jan 2020 17:14:43 GMT

Successfully done what Peter adviced me to do and regarding next steps to resolve question I wrote below (also you can check my 1st message in this topic).

As I said, my goal is to model socket around hand and then bionic device prototype on top of it (want to create place for engine, place for battery, etc.).

I solved first problem - importing 3d scanned object, next I need to solve prolems:

1 - how to make socket around hand (wrap hand with some solid with offset). Also how to make pattern on this solid.

2 - how to model on resulting solid (socket I created). It's round and uneven surface, would be appreciate for tips here