Split mesh in different parts

Hi!

I've a very long mesh, and I want to slice this mesh in three differents parts, more precisely I want to cut this mesh certain values of Z and obtain three different gameObjects. How can I do?

 

There's plenty of Google search results that do this kind of thing, did you try any of those?

 

The general case for chopping up geometry is a process called Constructive Solid Geometry (CSG).

Probuilder has an API for this but I haven't used it.

Ideally you should chop it up in your modeling program first, then import the parts into Unity.

 

I already seen but I can't find anything really useful.
The idea is to take all the vertices after a given z and to create two different meshes, one with the vertices before the given z and one with the vertices after z. The problem is that I don't know how to take triangles of the selected vertices, do you have an idea?

 

Yes, lots of ideas. It is super-easy to make triangles out of vertices in Unity. There is no easier engine for procedural geometry, IMNSHO.

You can see a few dozen different examples in my MakeGeo project, ranging from a single triangle out to much more complicated stuff.

MakeGeo is presently hosted at these locations:

https://bitbucket.org/kurtdekker/makegeo

https://github.com/kurtdekker/makegeo

https://gitlab.com/kurtdekker/makegeo

https://sourceforge.net/p/makegeo