MeshView
========

.. py:class:: py3dm.MeshView

   Tiny wrapper to read-only access `Mesh` (``ON_Mesh``) objects.



   .. py:method:: is_corrupt(repair: bool, silent_error: bool, text_log: TextLog | None = None) -> bool

      Check for corrupt data values that are likely to cause crashes.

      :param repair: If ``True``, ``const_cast<>`` will be used to change the corrupt
                     data so that crashes are less likely.
      :type repair: bool
      :param silent_error: If ``True``, ON_ERROR will not be called when corruption is
                           detected.
      :type silent_error: bool
      :param text_log: If text_log is not null, then a description of corruption is
                       printed using text_log.
      :type text_log: TextLog

      .. rubric:: Notes

      Ideally, ``is_corrupt`` would be a virtual function on ``ON_Object``,
      but doing that at this point would break the public SDK.



   .. py:method:: is_empty() -> bool

      Returns ``True`` if there are zero vertices or zero faces.




   .. py:method:: is_not_empty() -> bool

      Returns ``True`` if there are vertices or faces.




   .. py:method:: is_valid(text_log: TextLog | None = None) -> bool

      Tests an object to see if its data members are correctly
      initialized.

      :param text_log: If the object is not valid and ``text_log`` is not ``None``, then a
                       brief english description of the reason the object is not valid is
                       appended to the log. The information appended to ``text_log`` is
                       suitable for low-level debugging purposes by programmers and is not
                       intended to be useful as a high level user interface tool.
      :type text_log: `TextLog`, optional

      :returns: **success** -- ``True`` if the object is valid or ``False`` if the object is
                invalid, uninitialized, etc.
      :rtype: bool



   .. py:method:: face_count() -> int

      Return the number of faces.




   .. py:method:: hidden_vertex_count() -> int

      Return the number of hidden vertices.




   .. py:method:: invalid_face_count() -> int

      Return the number of faces that are invalid.




   .. py:method:: quad_count() -> int

      Return the number of faces that are quads.




   .. py:method:: triangle_count() -> int

      Return the number of faces that are triangles.




   .. py:method:: vertex_count() -> int

      Return the number of vertices.




   .. py:method:: has_face_normals() -> bool


   .. py:method:: has_ngons() -> bool


   .. py:method:: has_principal_curvatures() -> bool


   .. py:method:: has_surface_parameters() -> bool


   .. py:method:: has_vertex_colors() -> bool


   .. py:method:: has_vertex_normals() -> bool