noise.py

import math
import time
import random
from maya import cmds
from maya import mel


### SETTINGS ###

targets = cmds.ls(selection=True)
attributes = ['ty']
amplitude = 0.1
frequency = 1.0
looping = True


### MAIN ###

# Setup
cmds.refresh(su=True)
startTime = cmds.currentTime(q=True)

start = int(cmds.playbackOptions(minTime=True, q=True))
end = int(cmds.playbackOptions(maxTime=True, q=True))
duration = end - start

# Create Animation
    
for target in targets:
    for attr in attributes:
        
        seed = random.uniform(0,123456789)
        
        for frame in range(start, end):
            cmds.currentTime(frame)
            value = float(frame - start)
            
            if looping:
                theta = (value / float(duration + 1)) * 2.0 * math.pi
                x = math.cos(theta) * frequency
                y = math.sin(theta) * frequency
                value = mel.eval("noise <<%s, %s, %s>>" % (x, y, seed))
            else:
                value = mel.eval("noise <<%s, %s, 0.0>>" % (value * frequency, seed))
                
            print value
            value = (value) * amplitude
            cmds.setAttr('%s.%s' % (target, attr), value)
            cmds.setKeyframe(target, at=attr)
    

# Cleanup
cmds.currentTime(startTime)
cmds.refresh(su=False)