import numpy as np
import open3d as o3d

def mesh_network(point_cloud):

    pcd = point_cloud
    cl, ind = pcd.remove_statistical_outlier(nb_neighbors=20, std_ratio=20.0)
    pcd = pcd.select_by_index(ind)

    pcd.estimate_normals()
    pcd.orient_normals_to_align_with_direction()

    mesh = o3d.geometry.TriangleMesh.create_from_point_cloud_poisson(pcd, depth=12, n_threads=1)[0]
    rotation = mesh.get_rotation_matrix_from_xyz((np.pi, 0, 0))
    mesh.rotate(rotation, center=(0, 0, 0))
    o3d.io.write_triangle_mesh(f'./mesh_depth12.obj', mesh)

    return mesh