pysdic.Mesh.from_npz

classmethod Mesh.from_npz(filename, element_type=None, load_properties=True)

Create a Mesh instance from a NPZ file.

This method uses numpy to read the NPZ file and then converts it to a Mesh instance.

See also

• Mesh.to_npz() for the reverse operation.

• numpy documentation for more information.

• Mesh for more information on the Mesh class and element types.

Parameters:

• filename (str) – The path to the NPZ file.

• element_type (Optional[str], optional) – The expected type of elements in the mesh, by default None.

• load_properties (bool, optional) – If True, properties are extracted from the NPZ file, by default True.

Returns:

A Mesh instance created from the NPZ file.

Return type:

Mesh

Raises:

• FileNotFoundError – If the file does not exist.

• ValueError – If the file format is not supported or the mesh structure is invalid.

Examples

Create a simple meshio.Mesh object.

import numpy as np
from pysdic import Mesh

points = np.array([[0, 0, 0], [1, 0, 0], [0, 1, 0], [0, 0, 1]])
cells = np.array([[0, 1, 2], [0, 1, 3], [0, 2, 3], [1, 2, 3]])
mesh = Mesh(vertices=points, connectivity=cells, element_type="triangle_3")
mesh.save_npz("simple_mesh.npz")

Create a Mesh instance from the NPZ file.

mesh3d = Mesh.from_npz("simple_mesh.npz")
print(mesh3d.vertices)
# Output: PointCloud with 4 points [[0, 0, 0], [1, 0, 0], [0, 1, 0], [0, 0, 1]]