how to convert a mesh with too many triangles into a body
Go to mesh workspace and select reduce from the modify menu, then go to the model workspace and right-click the mesh and convert it into a BRep ( Mesh to BRep )
Regards
Saeed Hamza
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Here is the arm after I patched it and stitched it ( file is attached )
Saeed Hamza
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HI
I am having the same issue with the attached file. Every time i go to create> Create mesh so that i can turn on mesh work space on i get the bellow message. I am having issues printing this file and i believe it maybe because it doesn't have a flat surface, so i wanted to modify the file and make a flat surface at the bottom. P Lease help as i am a nube to Fusion
@adamjames95 wrote:
Hi @Anonymous ,
I created a YouTube video demonstrating the latest way to resolve this (linked below):
Hope this helps!
https://www.youtube.com/watch?v=_zy7LYrrpfI
-Adam James
This isn't "the latest way" to resolve that error and quite frankly your tutorial is outright misleading.
First I believe you should explain the reason for that warning message.
When you import a .stl, by definition of that data format it includes a triangulated mesh. A triangulated mesh is one way to represent 3D geometry. Triangulated meshes have a finite resolution and no topology (in a mathematical sense)
That finite resolution is the reason why most CAD software including Fusion 360 does not natively use meshes to represent 3D geometry (for design input) but uses NURBS / BRep. Those are mathematically precise descriptions of geometry with theoretically infinite resolution and models built with them have topology.
Meshes, are computationally simple. NURSB/BRep on the other hand are not. When a .stl is converted directly into a solid body, every triangular facet is converted into a 1-degree (flat) NURBS surface.
That alone will create a very "heavy" and computationally intensive model.
An egg shape, for example can be represented by a single NURBS surface. If you create a cylindrical hole though that egg, CAD software has to calculate two trimming loops where the cylindrical surface and the egg shape intersect.
However if that egg was converted into a .stl file and that was then directly converted into a faceted solid, now CAD software might have to calculate a few hundred NURBS surface intersections to create that hole and also has to store many more trimming loops in memory. That is very computationally intensive and to make users aware that warning message exists.
There are at least two main avenues a user can now explore if a solid model is desired:
1. Reduce the mesh density. That usually results in a large loss of detail and the end result is usually not very good!
2. Re-mesh the .stl into a quad mesh and convert that quad mesh into a T-Spline solid. I created the tutorial below a number of years ago to show a few techniques:
In the tutorial I used a few other software packages to get to an end result. I used InstantMeshes to re-mesh the objects. By now Fusion 360 has a built-in method with the organic mesh conversion. This requires a paid subscription:
However it is rather slow and there are a good number of other options that can help. ZBrush and 3DCoat have industry leading re-meshers. Blender has a marching cube and quadriflow remesher. I belive an InstatMeshes plugin exists for Blender. The Lab tools in SideFX Houdini also include InstantMeshes.
Remeshing complex, triangulated meshes is really the latest and greatest method to covert complex triangulated meshes into solids.