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121 lines
3.7 KiB
ReStructuredText
121 lines
3.7 KiB
ReStructuredText
.. _smeshpy_interface_page:
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****************
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Python interface
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****************
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Python API of SALOME Mesh module defines several classes that can
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be used for easy mesh creation and edition.
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Documentation of SALOME Mesh module Python API is available in two forms:
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- :doc:`Structured documentation <modules>`, where all methods and classes are grouped by their functionality.
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- :ref:`Linear documentation <modindex>` grouped only by classes, declared in the :mod:`smeshBuilder` Python module.
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With SALOME 7.2, the Python interface for Mesh has been slightly modified to offer new functionality.
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You may have to modify your scripts generated with SALOME 6 or older versions.
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Please see :ref:`smesh_migration_page`.
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Class :class:`smeshBuilder.smeshBuilder` provides an interface to create and handle
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meshes. It can be used to create an empty mesh or to import mesh from the data file.
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As soon as a mesh is created, it is possible to manage it via its own
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methods, described in class :class:`smeshBuilder.Mesh` documentation.
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Class :class:`smeshstudytools.SMeshStudyTools` provides several methods to manipulate mesh objects in Salome study.
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A usual workflow to generate a mesh on geometry is following:
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#. Create an instance of :class:`smeshBuilder.smeshBuilder`:
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.. code-block:: python
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:linenos:
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from salome.smesh import smeshBuilder
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smesh = smeshBuilder.New()
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#. Create a :class:`smeshBuilder.Mesh` object:
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.. code-block:: python
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:linenos:
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mesh = smesh.Mesh( geometry )
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#. Create and assign :ref:`algorithms <basic_meshing_algos_page>` by calling corresponding methods of the mesh. If a sub-shape is provided as an argument, a :ref:`sub-mesh <constructing_submeshes_page>` is implicitly created on this sub-shape:
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.. code-block:: python
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:linenos:
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regular1D = mesh.Segment()
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mefisto = mesh.Triangle( smeshBuilder.MEFISTO )
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# use other triangle algorithm on a face -- a sub-mesh appears in the mesh
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netgen = mesh.Triangle( smeshBuilder.NETGEN_1D2D, face )
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#. Create and assign :ref:`hypotheses <about_hypo_page>` by calling corresponding methods of algorithms:
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.. code-block:: python
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:linenos:
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segLen10 = regular1D.LocalLength( 10. )
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maxArea = mefisto.LocalLength( 100. )
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netgen.SetMaxSize( 20. )
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netgen.SetFineness( smeshBuilder.VeryCoarse )
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#. :ref:`compute_anchor` the mesh (generate mesh nodes and elements):
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.. code-block:: python
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:linenos:
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mesh.Compute()
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An easiest way to start with Python scripting is to do something in
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GUI and then to get a corresponding Python script via
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**File > Dump Study** menu item. Don't forget that you can get
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all methods of any object in hand (e.g. a mesh group or a hypothesis)
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by calling *dir()* Python built-in function.
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All methods of the Mesh Group can be found in :ref:`tui_create_standalone_group` sample script.
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An example below demonstrates usage of the Python API for 3D mesh
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generation and for retrieving information on mesh nodes and elements.
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.. _example_3d_mesh:
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Example of 3d mesh generation:
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##############################
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.. literalinclude:: ../../../examples/3dmesh.py
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:linenos:
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:language: python
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:download:`Download this script <../../../examples/3dmesh.py>`
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Examples of Python scripts for Mesh operations are available by
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the following links:
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.. toctree::
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:titlesonly:
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tui_creating_meshes
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tui_defining_hypotheses
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tui_grouping_elements
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tui_filters
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tui_modifying_meshes
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tui_transforming_meshes
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tui_viewing_meshes
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tui_quality_controls
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tui_measurements
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tui_work_on_objects_from_gui
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tui_notebook_smesh
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tui_cartesian_algo
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tui_use_existing_faces
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tui_prism_3d_algo
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tui_generate_flat_elements
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.. toctree::
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:hidden:
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smesh_migration.rst
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smeshBuilder.rst
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StdMeshersBuilder.rst
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smeshstudytools.rst
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modules.rst
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smesh_module.rst
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