select Random edges

[Vishal Kadam]

Hello,

can anyone help me, I want to select random edges using python script, as we do that from polygon selection constraint on edges then adjusting the count using ratio value

[MichaelEden]

# import random module, documentation is here:

# https://docs.python.org/3/library/random.html

import random

# select the object

selection = cmds.ls(sl=True)[0]

# calculate how many edges this object have

maxRandomValue = cmds.polyEvaluate(edge=True)

# select the random edges of the object selected

cmds.select("{}.e[{}]".format(selection, random.randint(0,maxRandomValue)))

# print

print "{} is selected".format(cmds.ls(sl=True)[0])

hopefully it helps. cheers. 

[Vishal Kadam]

thanks but it selects only one random edge

[Vishal Kadam]

I have this in mel but I need this in python

ConvertSelectionToEdges;

PolySelectConvert 2;

PolySelectConstraint -m 2;

PolySelectConstraint -r true;

PolySelectConstraint -rr 0.20;

polySelectSp -loop;

in this polySelectSp -loop; is not selecting edge loop properly it skips few edge loops and stuck in the middle

can anyone help me to convert this in python or can I have same kind of script where I can select random edge loops

[Vishal Kadam]

Hi can anyone please reply on this

[MichaelEden]

i'm not sure what you mean. but if you already have mel script and want to change it into python in a hurry, just convert it using mel.eval

from maya import mel

mel.eval("ConvertSelectionToEdges;")

mel.eval("PolySelectConvert 2;")

mel.eval("PolySelectConstraint -m 2;")

mel.eval("PolySelectConstraint -r true;")

mel.eval("PolySelectConstraint -rr 0.20;")

mel.eval("polySelectSp -loop;")

[Vishal Kadam]

this doesn't work for me as I need it, so basically I want to select random edges from an object and control the random count by a value, can that be possible using python

[Soham Parmar]

I am also not sure what exactly what you want, but if you just want to select random edges from polygon then MichaelEden’s first reply was helpful i think. you just want to change some line if you want multiple edges rather then one.

i have quickly  changed few line from MichaelEden’s first reply for selecting multiple edges.

import random
def randomEdgeSelection(obj, randomEdgeCount):

   # calculate how many edges this object have
   maxRandomValue = cmds.polyEvaluate(edge=True)
   

   # random edges count can not be grater the edges in the poly
   if randomEdgeCount > maxRandomValue:
      cmds.error("randomEdgeCount can not be grator then maxRandomValue")
   
   edgeIndex = []
   for i in range(randomEdgeCount):

      # select the random edges of the object selected

      edgeIndex.append(random.randint(0, maxRandomValue))
   
   edges = []
   for index in edgeIndex:
      edges.append("{0}.e[{1}]".format(obj, index))
   
   cmds.select(edges)
   
randomEdgeSelection(cmds.ls(sl=True)[0], 20)

hopefully it helps.

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[Vishal Kadam]

Thanks this it works but for example if I have a cube with these values height = 5, subdiv width and depth = 5, and  subdiv height = 20, and when we use this script horizontal edges selection will be very lesser than vertical edges, so is it possible to select more random edges horizontally, or control the count of edge selection for vertically and horizontally

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[Vishal Kadam]

Hi can anyone please reply on this

[Marcus Ottosson]

You've already gotten tons of (really good!) help Vishal, but I haven't seen you apply any of the help to your problem. What have you tried so far, where do you get stuck?

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[Vishal Kadam]

The help which Soham Parmar has done it works as same as the built-in maya from poly constraints selecting random edges that is fine it works and thanks for that, but my question is is there any option or possibility possible to select more random edges horizontally, or control the count of edge selection for vertically and horizontally

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