Today2 maya python mel

today2.py

# random particle velocity -- (the right way)

# maybe try making a list that cross checks before and after dynamics? is that a bad idea?
 
import maya.cmds as cmds
import random

from maya.OpenMaya import MVector
 
random.seed(1234)
 
 
# setup 
amountOfParticles = 50
r = 10
vr = 10
myList = list()
pointList = list()

 
# functions



def vectorCompHandler (x, y, z, id):
    pointList[id] = MVector(x,y,z)
    for i in range(0, amountOfParticles):
        dist = MVector(pointList[id]-pointList[i]).length()
        if dist > 10:
            



 
#list particles and delete
# convenience
 
particleList = cmds.ls( 'particleObject*' )
#if there are any, then delete them all
if len(particleList) >= 1: 
    cmds.delete(particleList)
    print ('deleted old particleObject')
else:
    print ('no old particleObjects')
 
 
 
# make all particles and add em
 
for i in range( 0, amountOfParticles):
    
    x = random.uniform(- r, r)
    y = random.uniform(- r, r)
    z = random.uniform(- r, r)
    newPosition = (x,y,z)
    myList.append(newPosition)
    pointList.append(MVector(0,0,0))
    
    
cmds.particle(p=myList,n='particleObject#')
 
 
 
velCExpString = 'float $myRange = %s; float $vx = rand(-$myRange, $myRange); float $vy = rand(-$myRange, $myRange); float $vz = rand(-$myRange, $myRange); particleObject2Shape.velocity = <<$vx, $vy, $vz>>;' %(vr)  
#just a little check to see if im doing it right
print ('---print--- velCExpString= ' + velCExpString)
#the dynExp iterates through each particle... so you dont have to.
cmds.dynExpression( 'particleObject*Shape', s=velCExpString, c=1 )

passRBDExpString = 'vector $myv = particleObject2Shape.position; int $pId = particleObject2Shape.particleId; string $myPy = "vectorCompHandler(" + $myv.x + "," + $myv.y + "," + $myv.z + "," + $pId + ")"; python($myPy);'
print ('---print--- passRBDExpString= ' + passRBDExpString)
cmds.dynExpression( 'particleObject*Shape', s= passRBDExpString, rbd=1)