IGA manipulation module

Created on Fri Feb 23 2018

@author: thirschler

CONTAINS: Utility functions to apply boundary conditions and for multi-patch coupling.

yeti_iga.preprocessing.igaparametrization.IGAmanip.get_boundCPindice(Nkv, Jpqr, num_bound, num_patch=0, offset=0)

Get indices from boundary face control points of a given patch.

Returns local indices of control points controlling the boundary indexed at num_bound of the patch indexed at num_patch. The offset argument enables to return the indices of control points forming a following row.

Parameters:

  • Nkv (list of int) – Number of knots by direction.

  • Jpqr (list of int) – Degree by direction.

  • num_bound (int) – Index of the boundary face. Must be 1, 2, 3, 4, 5 or 6.

  • num_patch (int, optional) – Index of the patch. The default is 0.

  • offset (int, optional) – Offset to get the indices of a following row of control points. The default is 0.

Returns:

ind_face – List of local control points indices on the boundary.

Return type:

list of int

yeti_iga.preprocessing.igaparametrization.IGAmanip.get_vertexCPindice(Nkv, Jpqr, dim, num_patch=0)

Return indices of control points describing the corners of a given patch

Parameters:

  • Nkv (2D array of float) – knot vectors size for all patches

  • Jpqr (2D array of int) – degrees for all patches

  • dim (array of int) – dimension for all patches

  • num_patch (int, optional) – Index of the patch. The default is 0

Returns:

vertex – corner points of the patch

Return type:

array