1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
|
function edges = meshedge(elem, varargin)
%
% edges=meshedge(elem,opt)
%
% return all edges in a surface or volumetric mesh
%
% author: Qianqian Fang, <q.fang at neu.edu>
% date: 2011/02/26
%
% input:
% elem: element table of a mesh (support N-d space element)
% opt: optional input, giving the additional options. If opt
% is a struct, it can have the following field:
% opt.nodeorder: if 1, assuming the elem node indices is in CCW
% orientation; 0 use nchoosek() output to order edges
% you can replace opt by a series of ('param', value) pairs.
%
% output:
% edge: edge list; each row is an edge, specified by the starting and
% ending node indices, the total edge number is
% size(elem,1) x nchoosek(size(elem,2),2). All edges are ordered
% by looping through each element first.
%
% -- this function is part of iso2mesh toolbox (http://iso2mesh.sf.net)
%
dim = size(elem);
edgeid = nchoosek(1:dim(2), 2);
len = size(edgeid, 1);
edges = zeros(dim(1) * len, 2);
for i = 0:len - 1
edges((i * dim(1) + 1):((i + 1) * dim(1)), :) = [elem(:, edgeid(i + 1, 1)) elem(:, edgeid(i + 1, 2))];
end
|
