[Gmsh] How to do nodes reordering in gmsh

[xiang daopu]

Hi all gmsh users,

When I do 1D mesh in gmsh and then refine by splitting,
the segment nodes is wrong.


​Here is the msh file:
$MeshFormat
2.2 0 8
$EndMeshFormat
$Nodes
5
1 0 0 0
2 1 0 0
3 0.2499999999994083 0 0
4 0.4999999999986718 0 0
5 0.7499999999993359 0 0
$EndNodes
$Elements
6
1 15 2 0 1 1
2 15 2 0 2 2
3 1 2 0 1 1 3
4 1 2 0 1 3 4
5 1 2 0 1 4 5
6 1 2 0 1 5 2
$EndElements

>From the elements section we can see the segment nodes is wrong.
My question is: how to do nodes reordering in gmsh?

Thanks in advance!
Best regards!
Daopu
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