Convert surfaces to mesh with matching edges

Rhino
1

I want to convert NURBS object to mesh and use forward for meshing.

NURBS could represents closed objects - but they are exploded asto few segments I need them separated to set conditions.

If I joined them to closed polysurface - the result with mesh command is fine - closed mesh. Then is quite painful to manually explode meshes again, especially on more complex geometries

But if piecewise convert them to mesh, the edges of meshes are not matching.

Is there any trick or easy solution for that?

Below simple example with pipe and inlet face.

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2

the Mesh representation is always an approximation of the actual surface.

Depending on the tolerance you need, you make that mesh coarser or finer.

Here is some useful information about the meshing properties you can tune

3

If you mesh it all Joined up and then Explode the mesh, it will(should? To the extent that I’ve ever done this for rendering purposes,) divide it up based on the underlying surfaces.

4

I wasn’t reading this correctly. What you describe can happen if you have jagged seams option enabled, is that the case?

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5

Hi Simon -

For a shape like the cylinder that you posted, you can just mesh from the closed brep. Then run Unweld and then Explode. That will give you 3 different mesh objects that have edges that all line up.
-wim

6

Hi,

Thanks forhe answers!

@JimCarruthers and @wim yes that works, for simple pipes would be fine. but for complex geometries when you explode you get one mesh for each surface. For the cases with many polysurfaces each consists of dozen of surfaces it’s a lot of manual work joining them right…

@Gijs I tried it but no difference…