Mesh

[rushabhthakkar_910]

How Do you use Mesh, And Why and When....?

[TrippyLighting]

PLease create a screencast

[o.briggs.1 · Accepted solution]

It fully depends on the file type. Certain file types such as STL are mesh based so inserting an STL file will always bring it in as a mesh. Other files types are similar so it just depends what file type the person that made it uploaded.

You can convert mesh to brep. Depending what is imported and the complexity you may have to edit the mesh first as fusion can only convert files that are up to a certain number of mesh faces etc. It will tell you if it has too many.

There are limited mesh tools but I personally always convert it to a brep and make edits on the brep model 🙂

[TrippyLighting]

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@o.briggs.1 wrote:

There are limited mesh tools but I personally always convert it to a brep and make edits on the brep model 🙂

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More often than not, that's a bad idea!

[o.briggs.1]

Ah ok I didn’t realise! Thanks for letting me know. I mostly do stuff with mesh for 3D printing. Often editing an STL downloaded from online to print by adding stuff and or splitting bodies so I can do duel extrusion. Am I better off sticking to the mesh workspace would you say? 🙂 

[TrippyLighting]

If the edits don't slow down FUiosn 360 you are oK.

In FUiosn 360 and other CAD software, geometry is represented as analytical geometry or NURBS geometry often contained in BRep (solids). These mathematically precise representations require more computational resouces. 

When you convert a triangulated mesh into a BRep then all these triangular facets are converted into such mathematically precise representations.  That can slow down FUiosn 360. Imagine you are extruding a cylinder through a block to create a hole. Fusion 360 only has to compute the intersections between very few surfaces.

Now try that with a converted triangulated object. Fusion might have to compute the intersection between hundreds, or thousands of surfaces.

[o.briggs.1]

that makes sense! I am lucky to have quite a high powered computer so I may have just not encountered the issue, but it is very useful to know! Thanks 🙂 

[rushabhthakkar_910]

I agree with you in this Sir @TrippyLighting.

Tried Inserting an .STL file and converted it into B-Rep and Edited it... And made 4-5 copies of it.... 

And it had more than 80,000 Mesh Faces in it and it slowed down Fusion...

But, with me, this Slowing Down of Fusion Happens when the Design made from Scratch which does not have any Mesh Files crossed more number of Parts/Bodies, Because it's a Big Design, Then too Fusion's Response slows down....

[TrippyLighting]

Please share a design that you feel is slow (export as .f3d or .f3z and attach to post). I also asked you to share a screencast, so I can see how CAD geometry is importing as a Mesh.

Without data to analyze I can do very little.

Something I can tell you from vast experience in looking at other users Fusion 360 designs, here on the forum, on the Fusion 360 Facebook page, and privately that 95% of Fusion 360 users whose designs suffer from performance problem have committed the one or the other modeling/technique mistakes.