Update utils.py

utils.py

@@ -1,37 +1,23 @@
 import pymeshlab
 import trimesh
-import numpy as np
+import open3d as o3d
 
 def mesh_to_pymesh(vertices, faces):
-    mesh = pymeshlab.Mesh(
-        vertex_matrix=np.asarray(vertices, dtype=np.float64),
-        face_matrix=np.asarray(faces, dtype=np.int32),
-    )
+    mesh = pymeshlab.Mesh(vertex_matrix=vertices, face_matrix=faces)
     ms = pymeshlab.MeshSet()
     ms.add_mesh(mesh)
     return ms
 
-def pymesh_to_trimesh(mesh: pymeshlab.Mesh):
-    verts = mesh.vertex_matrix()
-    faces = mesh.face_matrix()
-    return trimesh.Trimesh(
-        vertices=verts,
-        faces=faces,
-        process=False,   # IMPORTANT
-    )
+def pymesh_to_trimesh(mesh):
+    verts = mesh.vertex_matrix()#.tolist()
+    faces = mesh.face_matrix()#.tolist()
+    return trimesh.Trimesh(vertices=verts, faces=faces)  #, vID, fID
 
-def simplify_mesh(mesh: trimesh.Trimesh, n_faces: int):
-    if mesh.faces.shape[0] <= n_faces:
-        return mesh
-
-    ms = mesh_to_pymesh(mesh.vertices, mesh.faces)
-
-    ms.meshing_merge_close_vertices()
-    ms.meshing_decimation_quadric_edge_collapse(
-        targetfacenum=n_faces,
-        preserveboundary=True,
-        preservenormal=True,
-        preservetopology=True,
-    )
-
-    return pymesh_to_trimesh(ms.current_mesh())
+def simplify_mesh(mesh: trimesh.Trimesh, n_faces):
+    if mesh.faces.shape[0] > n_faces:
+        ms = mesh_to_pymesh(mesh.vertices, mesh.faces)
+        ms.meshing_merge_close_vertices()
+        ms.meshing_decimation_quadric_edge_collapse(targetfacenum = n_faces)
+        return pymesh_to_trimesh(ms.current_mesh())
+    else:
+        return mesh