How to detect border edge of poliginal surface?

[dsinisa]

I want to select one of the border edges of a poligonal surface, with mel script ?
It seems hard to detect border edge, I tried with polySelectConstraint command, but couldnt achive good results.
Any help?
Thx.

[gdc]

You can get alist of all of the boarder edges on a mesh with the follwing bit of mel code:

select -r $yourMesh;
polySelectContraint -m -t 0x8000 -w 1;
string $boarderEdges[]=ls -sl;
polySelectContraint -dis;

What options where you tring with polySelectContraint?

--g

[dsinisa]

Yes, I tried this, but it selects all egdes of a primitive or a polygon mesh ?
I read docs. on polySelectContraint and tried to change flags for -w 1 or -w 2 to get proper edges selection but it seems that there are two cases :
1. all edges are selected
2. nothing is selected

Any help ?
Thx.

[gdc]

Hmmm, that's wierd. When I run this I get just the boarder edges selected...

--g

[dsinisa]

When you create a default polygon cube with 3 subdiv. in x,y,z, and run the script - do you get only border edges selected ???

[scifiwasabi]

a cube doesn't have any border edges.

delete one face. The following should select the faces that were connected to the face that was deleted:

polySelectConstraint -m 3 -t 0x8000 -w 1;
string $borderEdges[]=ls -sl -fl;
polySelectContraint -dis;

[dsinisa]

Thank you, it was my mistake.
I am tring to make a script that will make some kind of conversion between polys and nurbs. I wanna convert some of poly models to nurbs. Because I couldn't find any tool that can do this conversion I wanna try.
The idea is to slice polygonal mesh into n number of pieces and on the edges draw curves and loft these curves into nurbs.
All would be easier, but it seems that we can't make curve on the intersection of two poly meshes, and I had to make n number of planes intersecting my poly mesh, do boolean and draw curve on the intersection.
I know that will appear problem with parametrization of these curves but I will try to solve it.
Thak you for support.

dsinisa
www.sinartstudio.com