1(plex_transform_table)= 2 3# Summary of Unstructured Mesh Transformations 4 5```{eval-rst} 6.. list-table:: 7 :widths: auto 8 :align: center 9 :header-rows: 1 10 11 * - 12 - ``DMPlexTransformType`` 13 - Accepts Active Label 14 - Description 15 * - Mesh filtering 16 - transform_filter 17 - Yes 18 - Preserve a subset of the mesh marked by a `DMLabel` 19 * - Regular Refinement 20 - refine_regular 21 - No 22 - Splits all k-cells into :math:`2^k` pieces 23 * - Alfeld Refinement 24 - refine_alfeld 25 - No 26 - Barycentric refinement for simplicies 27 * - Skeleton-based Refinement (SBR) 28 - refine_sbr 29 - Yes 30 - Simplicial refinement from Plaza and Carey 31 * - 1D Refinement 32 - refine_1d 33 - No 34 - Optimized refinement for 1D meshes that preserves the canonical ordering 35 * - Simplex-to-Box transform 36 - refine_tobox 37 - No 38 - Replaces each simplex cell with :math:`2^d` box cells 39 * - Box-to-Simplex transform 40 - refine_tosimplex 41 - No 42 - Replaces each box cell with simplex cells 43 * - Mesh extrusion 44 - extrude 45 - Yes 46 - Extrude n layers of cells from a surface 47 * - Boundary Layer Extrusion 48 - refine_boundary_layer 49 - Yes 50 - Creates n layers of tensor cells along marked boundaries 51 * - Cohesive cell extrusion 52 - cohesive_extrude 53 - Yes 54 - Extrude a layer of cells into a mesh from an internal surface 55``` 56