Selection order for triangulation

[likage]

I am trying to create a triangulation (not sure if this is the right word) script? Basically what I am trying to achieve is create a polygon out of the selection of the locators (it must be 3 or more locators)

While I am able to do so, I am having this order of selection problem. Eg. In my scene, there are 4 locators - loc1, loc2, loc3, loc4

If I drag select from the loc1 upwards to loc4, instead of creating the polygon like in img01, it is created as shown in img02 ordered by the locator numbering sort of? Seems to me, it is sorting the selection based on its locator creation order, in which this is not what I am trying to do it

Am I missing something?

import maya.cmds as cmds

pts = []

cmds.select( cmds.listRelatives( type = 'locator', fullPath = True, allDescendents = True ) )
cmds.select( cmds.listRelatives( parent = True, fullPath = True ) )
sel = cmds.ls ( selection = True, type = 'transform' )

if not sel:
    cmds.warning( "Please select a locator / No locators in selection " )


for loc in sorted(sel):
    coords = cmds.xform (loc, query=True, worldSpace=True, pivots=True)[0:3]
    print coords
    pts.append(coords)

cmds.polyCreateFacet(p = pts)

[Justin Israel]

The way I interpret your code is that even though you start out by basing it on the selection order, you then sort the locators. According to the layout of your locators in your images, this explains the twisted effect, since it crosses diagonally from loc2 to loc3. If you do want to control the order by the selection, then you wouldn’t want to sort it, and instead preserve the selection order:

locs = cmds.filterExpand(selectionMask=22, fp=True)
if not locs:
    cmds.warning( "Please select a locator / No locators in selection " )

sel = cmds.listRelatives(locs, parent=True)
points = [cmds.xform(t, q=True, ws=True, piv=True)[:3] for t in sel]
cmds.polyCreateFacet(p=points)

​

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[likage]

Can't remember the reason i added in sorted, but it was probably to make the hierarchy looks nice?
Even so, I am still getting the twisted effect.

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[Justin Israel]

Did you try my exact example, selecting the locators in the correct order? If you are box selecting them, then you are probably still getting 1,2,3,4 which is causing the twist.

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[likage]

Probably I should rephrase..
Maybe selection order isn't even the case and come to think of it, my images may also be somewhat misleading... I apologize in advance

what I am trying to achieve, its something more like the second post in this link

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[Justin Israel]

Ya, that definitely wasn't what I had thought you were asking. It appeared like your problem was just the selection/sorting. But I see now that it is a completely different question.

 

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