REX - Random Extrusion - Maya Python

rex.py

# 1. Select the object you want to randomly extrude
#    or use the "Make eCube" button to make one.
# 2. Press Check Selection.
# 3. Select the amount of random extrusion loops
#    you would like to make and click Random Extrude
# 4. Click Keyframe to key the current frame for all
#    vertices

import maya.cmds as cmds
import random

shapeName =''
objectName =''


def makeNewCube(*args):
    global objectName
    global shapeName
    
    cubes = list()
    cubes = cmds.ls('eCube')
    if (len(cubes)>0):
        cmds.delete(cubes)
    else:
        print('no cubes')

    cmds.polyCube(n='eCube', sx=10, sy=15, sz=5, h=5, w=5, d=5 )
    selectionList = cmds.ls(selection=True)
    objectName = selectionList[0]
    selectionList = cmds.listRelatives(s=True)
    shapeName = selectionList[0]
    #print(shapeName + ' ' + objectName)

def checkSelectName(*args):
    global objectName
    global shapeName
 
    selectionList = cmds.ls(selection=True)
    objectName = selectionList[0]
    selectionList = cmds.listRelatives(s=True)
    shapeName = selectionList[0]
    #print(shapeName + ' ' + objectName)
    

def moveFace(*args):
    global objectName
    global shapeName
    
    inputInt = cmds.intSliderGrp('extI', query=True, value=True)
    cmds.select(objectName)
    amountOfFaces = cmds.polyEvaluate(f=True)
    
    for mmm in range(0, inputInt):
        n1 = random.randrange(0,amountOfFaces)
        n2 = random.randrange(0,amountOfFaces)
        if n1>n2:
            faceStr = '%s.f[%i:%i]' %(objectName, n2, n1)
        else:
            faceStr = '%s.f[%i:%i]' %(objectName, n1, n2)
        #print ('selected faces -> ' + faceStr)
        cmds.select(faceStr)

        m1 = random.uniform(-3, 3)
        direction = random.randrange(0,3)
        if direction == 0:
            cmds.move(m1, 0, 0, r=True, os=True, wd=True)
        elif direction == 1:
            cmds.move(0, m1, 0, r=True, os=True, wd=True)
        else:
            cmds.move(0, 0, m1, r=True, os=True, wd=True)



def setKey(*args):
    global objectName
    global shapeName
    
    kFrameStr = '%s.pt[:]' %(shapeName)
    cmds.setKeyframe(kFrameStr)
    #cmds.selectKey(shapeName, time=(pStartTime, pEndTime), attribute=pTargetAttribute, keyframe=True)
    cmds.keyTangent(inTangentType='linear', outTangentType='linear')
    print('keyed')
    cmds.autoKeyframe(state=False)

#makeNewCube()
#moveFace(thisManyTimes)
#setKey()

class rexUI():
    def __init__(self):
        
        rexUi = 'rexUi'
        
        if cmds.window(rexUi, exists=True):
            cmds.deleteUI(rexUi)
        
        rexUi = cmds.window(rexUi, t='REX', tb=True, rtf=True)
 
        form = cmds.columnLayout(adjustableColumn=True)                  
        
        bChSel = cmds.button('Check Selection', command=checkSelectName)
        bBuild = cmds.button('Build eCube', command=makeNewCube)
        cmds.separator(h=10, style="none")
        cmds.text(label="Extrude Iterations")
        cmds.intSliderGrp('extI', field=True, minValue=1, maxValue=200, value=10)
        
        cmds.separator(h=5, style="none")
        bRandomize = cmds.button('Random Extrude', command=moveFace)
        bKeyframe = cmds.button('Keyframe', command=setKey)
 
        cmds.showWindow(rexUi)
        cmds.window(rexUi, edit=True, widthHeight=(150,150))
        
 
rexUser = rexUI()