neighbors - Class: TriRep
Simplex neighbor information
Syntax
SN = neighbors(TR, SI)
Description
SN = neighbors(TR, SI) returns the simplex
neighbor information for the specified simplices SI.
Inputs
| TR | Triangulation representation. |
| SI | SI is a column vector of simplex indices
that index into the triangulation matrix TR.Triangulation.
If SI is not specified the neighbor information
for the entire triangulation is returned, where the neighbors associated
with simplex i are defined by the i'th
row of SN. |
Outputs
| SN | SN is an m-by-n matrix,
where m = length(SI) , the number of specified
simplices, and n is the number of neighbors per
simplex. Each row SN(i,:) represents the neighbors
of the simplex SI(i). By convention,
the simplex opposite vertex(j) of simplex SI(i) is SN(i,j).
If a simplex has one or more boundary facets, the nonexistent neighbors
are represented by NaN. |
Definitions
A simplex is a triangle/tetrahedron or
higher-dimensional equivalent. A facet is an
edge of a triangle or a face of a tetrahedron.
Examples
Example 1
Load a 3-D triangulation and use TriRep to
compute the neighbors of all tetrahedra.
load tetmesh
trep = TriRep(tet, X)
nbrs = neighbors(trep)
Example 2
Query a 2-D triangulation created using DelaunayTri.
x = rand(10,1)
y = rand(10,1)
dt = DelaunayTri(x,y)
Find the neighbors of the first
triangle:
n1 = neighbors(dt, 1)
See Also
DelaunayTri
 | ne (MException) | | NET |  |
Includes the most popular MATLAB recorded presentations with Q&A sessions led by MATLAB experts.
Get the Interactive Kit
Store 
