topic Re: Error when using Prismatic Mesh Conversion in Fusion Design, Validate & Document Forum

Error when using Prismatic Mesh Conversion

tranq006 — Fri, 08 Apr 2022 02:37:21 GMT

Hello All,

I have a set of STLs that I am trying to convert the mesh to single surfaces that I can then extrude. Out of my 200+ STLs, these two (attached) give me errors on the conversion. I have been doing 'prismatic' mesh conversion to get the results I need on the others.

The only oddity that I have noticed on one of them is a particularly "sharp" point (see attached), and I am not sure if that is causing the issue or not, but if it is I assume there is some way to repair or smooth that point.

Any help on what is causing this issue and how to avoid it in the future would be great!

Re: Error when using Prismatic Mesh Conversion

TrippyLighting — Fri, 08 Apr 2022 10:25:18 GMT

I would not consider those meshes to be "prismatic".

Can you elaborate what this design is going to represent?

Re: Error when using Prismatic Mesh Conversion

tranq006 — Fri, 08 Apr 2022 14:03:53 GMT

They are contours for a lake. I was doing prismatic because that seemed to be giving me a single surface from which I could work with, but really all I need from these is the ability to extrude them.

Re: Error when using Prismatic Mesh Conversion

laughingcreek — Fri, 08 Apr 2022 16:25:24 GMT

I'm curious about the source of these meshes. Are mesh files what you are being given to start with, or are you creating the meshes from something else?

Re: Error when using Prismatic Mesh Conversion

tranq006 — Fri, 08 Apr 2022 16:41:40 GMT

I create the meshes in Matlab

Re: Error when using Prismatic Mesh Conversion

laughingcreek — Fri, 08 Apr 2022 16:47:07 GMT

from an image?

Re: Error when using Prismatic Mesh Conversion

tranq006 — Fri, 08 Apr 2022 17:12:21 GMT

Yes, and these are the only 2 meshes that I can't convert to a body

Re: Error when using Prismatic Mesh Conversion

laughingcreek — Fri, 08 Apr 2022 17:40:04 GMT

Personally, I wouldn't do this with meshes, at least not i fusion. fusions doesn't handle these types of meshes very well at all. (or really any type, but particularly the ones that use the type of meshing algorithm used here, the name of which I can't seem to remember, gaa). you might get more luck with converting the outline to a svg (break it up and use multiple sketches), but those have some pit fall also.

you can convert the mesh using the regular faceted approach, then edit the base feature and merge the faces (merge faces is only available in base feature mode or when the time line is off). here's a screen cast, you can see it still takes a while-

Re: Error when using Prismatic Mesh Conversion

hamid.sh. — Fri, 08 Apr 2022 23:35:29 GMT

I believe it's along this post. Just curious, can't you export to DXF? I see there are MATLAB libraries for this. If you can export to DXF it's more workable than mesh.

Re: Error when using Prismatic Mesh Conversion

tranq006 — Sat, 09 Apr 2022 02:29:04 GMT

Interesting, I didn't know meshes were so difficult to work with within Fusion. Thanks for the video, I will give that a try, but it seems like I should try a different approach. The contours themselves are not all that complex it seems, so there must be a more efficient way to get them in and working

Re: Error when using Prismatic Mesh Conversion

tranq006 — Sat, 09 Apr 2022 02:29:42 GMT

Hi Hamid,

I hadn't thought of exporting to DXF from Matlab, but I will give this a go

Re: Error when using Prismatic Mesh Conversion

jeff_strater — Sat, 09 Apr 2022 12:33:02 GMT

I would look into this method, that @TrippyLighting suggested, for working with "organic" meshes: how-to-work-with-irregular-and-organic-stl-files. This will produce a nice, smooth, representation of your lake geometry.