topic Re: PolySelectTraverse Python equivalent? in Maya Programming Forum

PolySelectTraverse Python equivalent?

Anonymous — Mon, 25 Dec 2017 22:49:26 GMT

So if you grow/shrink a selection with 'shift + , or shift + ,' Maya will output "select `ls -sl`;PolySelectTraverse 1;select `ls -sl`;", I'm interested in the PolySelectTraverse part since I'm certain it's the function shrinking or growing the selection. Problem is, this function doesn't exist in the MEL and Python API.

Is the function known as something else? Is it not a function at all? If so, then what's responsible for the growing and shrinking?

Re: PolySelectTraverse Python equivalent?

cheng_xi_li — Tue, 26 Dec 2017 06:43:34 GMT

Hi,

It is implemented in PolySelectTraverse.mel.

You could check the script file for how it works. If you would like to call it in Python, you could use mel.eval.

Yours,

Re: PolySelectTraverse Python equivalent?

forrest.brent — Mon, 04 Mar 2019 08:36:46 GMT

To actually answer your question:

mel.eval('PolySelectTraverse 1')
#expand selection including diagonals
mel.eval('PolySelectTraverse 2')
#contract selection including diagonals
mel.eval('PolySelectTraverse 3')
#select only the border of what you've got
mel.eval('PolySelectTraverse 4')
#not sure, maybe does something with vertices
mel.eval('PolySelectTraverse 5')
#expand selection excluding diagonals
mel.eval('PolySelectTraverse 6')
#contract selection excluding diagonals

7 8 and 9 don't seem to do anything but they don't return any errors either.