How to trim the non-manifold triangle off the stl file?

Hi everyone

I have a question about the 3D stl file processing.

Suppose that I have the 3D geometry (stl file).

I use stlread and trimesh command to plot it, then I found that some of elements are non-manifold.

I try to directly remove these two triangule faces for about entire afternoon, but I haven't done it succefully yet.

Could any one give me some suggestions?

Attached is the stl file, to view the stl file, with the codes as below:

fv=stlread('test.stl')
figure();
trimesh(fv);
axis equal

Answer 1

[Bruno Luong]

There is SW that can detect topology issue and attempt to correct it, such as

https://www.meshlab.net/