fem.FaceGroup
fem.FaceGroup()A batch of boundary faces tagged for boundary-condition selection.
Attributes
| Name | Type | Description |
|---|---|---|
| nodes | np.ndarray | Vertex indices per face, outward oriented — shaped (M, 4) for hex quads, (M, 3) for tet triangles. |
| centers | np.ndarray | Face centroids, shaped (M, 3). |
| normals | np.ndarray | Unit outward geometric normals, shaped (M, 3). |