pyleecan.Classes.MeshMat module

Method code available at https://github.com/Eomys/pyleecan/tree/master/pyleecan/Methods/Mesh/MeshMat

class MeshMat(cell=- 1, node=- 1, _is_renum=False, sym=1, is_antiper_a=False, label=None, dimension=2, init_dict=None, init_str=None)

Bases: Mesh

Gather the mesh storage format

VERSION = 1

get_node(indices=None)

Return a matrix of nodes coordinates.

Parameters:

• self (Mesh) – an Mesh object

• indices (list) – Indices of the targeted nodes. If None, return all.

• is_indice (bool) – Option to return the nodes indices (useful for unsorted

Returns:

• coordinates (ndarray) – nodes coordinates

• indices (ndarray) – nodes indices

get_node_indice(coordinates=None)

Return a matrix of nodes coordinates.

Parameters:

• self (Mesh) – an Mesh object

• indices (list) – Indices of the targeted nodes. If None, return all.

• is_indice (bool) – Option to return the nodes indices (useful for unsorted

Returns:

• coordinates (ndarray) – nodes coordinates

• indices (ndarray) – nodes indices

get_cell(indices=None)

Return the connectivity for one selected element

Parameters:

• self (MeshMat) – an MeshMat object

• indices (list) – list of indice. If None, return all.

Returns:

cells – Dict of connectivities

Return type:

dict

get_mesh_pv(path='C:/Users/LAP21/Documents/pyleecan/pyleecan/Results/temp.vtk', indices=None)

Return the pyvista mesh object (or submesh).

Parameters:

• self (MeshMat) – a MeshMat object

• indices (list) – list of the nodes to extract (optional)

Returns:

mesh – a pyvista UnstructuredGrid object

Return type:

pyvista.core.pointset.UnstructuredGrid

get_cell_area(indices=None)

Return the area of the cells on the outer surface. #TODO address multiple cell type issue, i.e. distracted indices :param self: a MeshMat object :type self: MeshMat :param indices: list of the points to extract (optional) :type indices: list

Returns:

areas – Area of the cells

Return type:

ndarray

get_vertice(indices=None)

Return a connectivity matrix where the nodes indices are replaced by their coordinates.

Parameters:

• self (MeshMat) – an MeshMat object

• cell_type (str) – a key corresponding to an element type

• group (ndarray) – One or several group numbers to be returned

Returns:

vertice – Selected vertices

Return type:

ndarray

get_node2cell(node_indice)

Return all cell indices of cells containing a node.

Parameters:

• self (MeshMat) – an MeshMat object

• node_indice (int) – a node indice

Returns:

node_to_cell – Indices of cells containing the node

Return type:

ndarray

add_cell(node_indices, cell_type)

Add a new cell defined by node indices and cell type.

Parameters:

• self (MeshMat) – an Mesh object

• node_indices (ndarray) – a ndarray of points indices

• cell_type (str) – Define the type of cell.

Returns:

new_ind – indice of the newly created cell. None if the cell already exists.

Return type:

int

renum()

Restart point indices from 0, and update connectivity. Indices of cells stay the same.

Parameters:

self (MeshMat) – an Mesh object

find_cell(points, nb_pt, normal_t=None)

Return the cells containing the target point(s)

Parameters:

• self (MeshMat) – an MeshMat object

• points (ndarray) – coordinates of the target point(s)

• nb_pt (int) – number of target points

Returns:

cell_list – A list of of selected cells

Return type:

list

interface(other_mesh)

Define a MeshMat object corresponding to the exact intersection between two meshes (nodes must be in both meshes).

Parameters:

• self (MeshMat) – a Mesh object

• other_mesh (Mesh) –

  an other Mesh object

  Returns

• ------- –

clear_node()

Remove non-used nodes based on cells connectivity.

Parameters:

self (MeshMat) – an Mesh object

clear_cell()

Remove non-used cells based on node indices.

Parameters:

self (MeshMat) – an Mesh object

save(save_path='', is_folder=False, type_handle_old=2, type_compression=0)

Save the object to the save_path

Parameters:

• self – A pyleecan object

• save_path (str) – path to the folder to save the object

• is_folder (bool) – to split the object in different files: separate simulation machine and materials (json only)

• type_handle_old (int) – How to handle old file in folder mode (0:Nothing, 1:Delete, 2:Move to “Backup” folder)

• type_compression (int) – Available only for json, 0: no compression, 1: gzip

get_logger()

Get the object logger or its parent’s one

Parameters:

obj – A pyleecan object

Returns:

logger – Pyleecan object dedicated logger

Return type:

logging.Logger

compare(other, name='self', ignore_list=None, is_add_value=False)

Compare two objects and return list of differences

as_dict(type_handle_ndarray=0, keep_function=False, **kwargs)

Convert this object in a json serializable dict (can be use in __init__). type_handle_ndarray: int

How to handle ndarray (0: tolist, 1: copy, 2: nothing)

keep_functionbool

True to keep the function object, else return str

Optional keyword input parameter is for internal use only and may prevent json serializability.

copy()

Creates a deepcopy of the object

property cell

Storing connectivity

Type:

{CellMat}

property node

Storing nodes

Type:

NodeMat

property sym

Spatial symmetry factor

Type:

int

property is_antiper_a

True if there is a spatial antiperiod

Type:

bool