Question Problem with splitting a mesh

I already wrote about this but I'll try again.
I'm writing a code that split a mesh in half. The cut point is Z = 0, so I have two meshes, one with everything on the left of Z = 0 and one with everything on the right.
My code is this:

Code (CSharp):

1.  
2.     Mesh mesh;
3.     Mesh newMesh;
4.     public List<Vector3> _Vertices;
5.     public List<int> _Triangles;
6.     int[] triangles;
7.     Vector3[] verts;
8.     public void AddTriangles(Vector3 vert1, Vector3 vert2, Vector3 vert3)
9.     {
10.         _Triangles.Add(_Vertices.Count);
11.         _Vertices.Add(vert1);
12.         _Triangles.Add(_Vertices.Count);
13.         _Vertices.Add(vert2);
14.         _Triangles.Add(_Vertices.Count);
15.         _Vertices.Add(vert3);
16.     }
17.     private void Awake()
18.     {
19.         GameObject newObj = GameObject.Find("default");
20.         mesh = GetComponent<MeshFilter>().mesh;
21.         newMesh = newObj.GetComponent<MeshFilter>().mesh;
22.         triangles = newMesh.triangles;
23.         verts = newMesh.vertices;
24.         for (int i = 0; i < triangles.Length; i += 3)
25.         {
26.             if ((verts[triangles[i]].z >= 0) && (verts[triangles[i + 1]].z >= 0) && (verts[triangles[i + 2]].z >= 0))
27.             {
28.                 AddTriangles(verts[triangles[i]], verts[triangles[i + 1]], verts[triangles[i + 2]]);
29.             }
30.         }
31.         mesh.vertices = _Vertices.ToArray();
32.         mesh.triangles = _Triangles.ToArray();
33.     }

But everytime that I run my code, if the mesh have a lot of triangles I obtain this kind of result:



Someone can tell me what I'm doing wrong?

 

Hello,

Have you watched this?

 

Why? I told you how to fix your data / logic error here:

https://forum.unity.com/threads/split-mesh-error.1276370/#post-8097947

Did you learn ANYTHING from that process? Remember we don't have your code running in our setup with your data and we don't even know exactly what you expect from the final output, nor were we privy to your thinking as you engineered it.

Just because you didn't like that answer and you failed to even have the common courtesy to respond to my post above, doesn't mean you just keep spamming the forum with fresh posts of the same question again and again.

I quote you the relevant forum section:



https://forum.unity.com/threads/unity-community-code-of-conduct.743180/

 

I apologize for not replying, I really appreciated the answer and it was absolutely not my intention to be rude. Unfortunately, despite trying all the suggestions, the error persists, so I thought I'd write the question again