cellFaces

Find faces belonging to two cuboids in a geometry consisting of four stacked cuboids.

Create a geometry that consists of four stacked cuboids.

gm = multicuboid(5,10,[1 2 3 4],"ZOffset",[0 1 3 6])

gm = 
  DiscreteGeometry with properties:

       NumCells: 4
       NumFaces: 21
       NumEdges: 36
    NumVertices: 20
       Vertices: [20×3 double]

Plot the geometry with the cell labels.

pdegplot(gm,"CellLabels","on","FaceAlpha",0.2)

Find faces belonging to cells 1 and 3.

faceIDs = cellFaces(gm,[1 3])

faceIDs = 1×12

     1     2     3     4     5     6     7    12    13    14    15    16

Plot the geometry with the face labels.

pdegplot(gm,"FaceLabels","on","FaceAlpha",0.2)

Find faces belonging to the outer cuboid in a geometry consisting of two nested cuboids.

Create a geometry that consists of two nested cuboids of the same height.

gm = multicuboid([2 5],[4 10],3)

gm = 
  DiscreteGeometry with properties:

       NumCells: 2
       NumFaces: 12
       NumEdges: 24
    NumVertices: 16
       Vertices: [16×3 double]

Plot the geometry with the cell labels.

pdegplot(gm,"CellLabels","on","FaceAlpha",0.2)

Find all faces belonging to the outer cell.

faceIDs = cellFaces(gm,2)

faceIDs = 1×10

     3     4     5     6     7     8     9    10    11    12

Find only the internal faces belonging to the outer cell. Internal faces are faces shared between multiple cells.

faceIDs_int = cellFaces(gm,2,"internal")

faceIDs_int = 1×4

     3     4     5     6

Find only the external faces belonging to the outer cell.

faceIDs_ext = cellFaces(gm,2,"external")

faceIDs_ext = 1×6

     7     8     9    10    11    12

Plot the geometry with the face labels.

pdegplot(gm,"FaceLabels","on","FaceAlpha",0.2)