'''
scatterGoalAcrossUV.py v1.1
Author: Nate Lang
web: natelang3d.com
Install: Copy this file into a python shelf button
Use:
Adds new particle attributes and sets the goal attribute
for selected particle system to scatter across the uv's
of the goal object.
'''
from maya import cmds
particleName = cmds.ls(selection=True)
for each in particleName:
particleShape = cmds.listRelatives(each)
cmds.addAttr(particleShape[0], longName='goalU', dataType='doubleArray')
cmds.addAttr(particleShape[0], longName='goalU0', dataType='doubleArray')
cmds.addAttr(particleShape[0], longName='goalV', dataType='doubleArray')
cmds.addAttr(particleShape[0], longName='goalV0', dataType='doubleArray')
cmds.dynExpression(particleShape[0], creation=True, string=(particleShape[0]+'.goalU = rand(0,1);\n'+particleShape[0]+'.goalV = rand(0,1);'))