cellEdges
Description
Examples
Edges Belonging to Specified Cells
Find edges belonging to the boundaries of the two middle cylinders in a geometry consisting of four stacked cylinders.
Create a geometry that consists of four stacked cylinders.
gm = multicylinder(5,[1 2 3 4],"ZOffset",[0 1 3 6])
gm = DiscreteGeometry with properties: NumCells: 4 NumFaces: 9 NumEdges: 5 NumVertices: 5 Vertices: [5x3 double]
Plot the geometry with the cell and edge labels.
pdegplot(gm,"CellLabels","on","EdgeLabels","on","FaceAlpha",0.2)
Find edges belonging to the boundaries of cells 2 and 3.
edgeIDs = cellEdges(gm,[2 3])
edgeIDs = 1×3
2 3 4
Cell Edges Belonging to Internal and External Faces
Find edges belonging to the boundaries of 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: [16x3 double]
Plot the geometry with the cell labels.
pdegplot(gm,"CellLabels","on","FaceAlpha",0.2)
Find all edges belonging to the boundaries of the outer cell. Show the first 10 edges.
edgeIDs = cellEdges(gm,2); edgeIDs(1:10)
ans = 1×10
1 2 3 4 5 6 7 8 9 10
From all edges belonging to the boundaries of the outer cell, return the edges belonging to only the internal faces. Internal faces are faces shared between multiple cells.
edgeIDs_int = cellEdges(gm,2,"internal")
edgeIDs_int = 1×4
9 10 11 12
From all edges belonging to the boundaries of the outer cell, return the edges belonging to the external faces. Show the first 10 edges.
edgeIDs_ext = cellEdges(gm,2,"external");
edgeIDs_ext(1:10)
ans = 1×10
1 2 3 4 5 6 7 8 13 14
Input Arguments
g
— 3-D geometry
fegeometry
object | DiscreteGeometry
object
3-D geometry, specified as an fegeometry
object
or a DiscreteGeometry
object.
RegionID
— Cell ID
positive number | vector of positive numbers
Cell ID, specified as a positive number or a vector of positive numbers. Each number represents a cell ID.
FilterType
— Type of edges to return
"all"
(default) | "internal"
| "external"
Type of edges to return, specified as "internal"
,
"external"
, or "all"
. Depending on this
argument, cellEdges
returns these types of faces:
"internal"
— Edges belonging to only internal faces. Internal faces are faces shared between multiple cells."external"
— Edges belonging to only external faces. External faces are faces not shared between multiple cells."all"
— All edges belonging to the specified cells.
Output Arguments
EdgeID
— IDs of edges belonging to boundaries of specified cells
positive number | vector of positive numbers
IDs of edges belonging to boundaries of specified cells, returned as a positive number or a vector of positive numbers.
Version History
Introduced in R2021aR2023a: Finite element model
cellEdges
now accepts geometries specified by fegeometry
objects.
See Also
Functions
Objects
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