mymesh.primitives.Extrude

mymesh.primitives.Extrude(m, distance, step, axis=2, twist=0, twist_center=None, ElemType=None)

Extrude a 2D mesh to a 3D surface or volume

Parameters:

• m (mymesh.mesh) – mesh object of 2D line mesh (m.Type=’line’) or 2D surface mesh (m.Type=’surf’)

• distance (scalar) – Extrusion distance

• step (scalar) – Step size in the extrusion direction

• axis (int, optional) – Extrusion axis, either 0 (x), 1 (y), or 2 (z), by default 2

• twist (float, optional) – Amount to twist the initial geometry (in radians) over the course of the extrusion, by default 0.

• twist_center (array_like, optional) – Center of rotation for twisting. If None is provided, the center of the initial geometry will be used.

• ElemType (str, optional) – Specify the element type of the extruded mesh. If m.Type=’line’, this can be None or ‘tri’ or if m.Type=’surf’, this can be None or ‘tet’. If ‘tri’ or ‘tet’, the mesh will be converted to a purely triangular/ tetrahedral mesh, otherwise it will follow from the input mesh (input line meshes will get quadrilateral elements, input surf meshes could get hexahedral, or wedge meshes). By default, None.

Returns:

extruded – Mesh object containing the extruded mesh.

Return type:

mymesh.mesh

Note

Due to the ability to unpack the mesh object to NodeCoords and NodeConn, the NodeCoords and NodeConn array can be returned directly (instead of the mesh object) by running: NodeCoords, NodeConn = primitives.Extrude(...)

Examples

x = np.linspace(0,1,100)
y = np.sin(2*np.pi*x)
coordinates = np.column_stack([x, y, np.zeros(len(x))])
connectivity = np.column_stack([np.arange(len(x)-1), np.arange(len(x)-1)+1])
line = mesh(coordinates, connectivity)
extruded = primitives.Extrude(line, 1, 0.2)
extruded.plot(bgcolor='w', show_edges=True)