Script to color and resize the point cloud according to the point visibility

color3dpointsMAYA.py

# color points and their size (if spehere) according to their visibility
# create color attribute per particle
# create general attribute radiusPP

import maya.cmds as mc
import colorsys

name = 'mvgPointCloud'
radiusBase = 0.005

## Count the number of particules
totalParticle = mc.particle(name, query=True, count=True)
print(totalParticle)
visibilitySizePerPoint = mc.getAttr(name+'.mvg_visibilitySize')
maxVisibility = float(max(visibilitySizePerPoint))
for (id) in range(totalParticle):
    # Query and print Particle position
    # myPos = mc.xform('mvgPointCloud.pt[{id}]'.format(id=id), query=True, translation=True)
    # Query and print Particle Color RGBPP
    # myColor = mc.particle('mvgPointCloud', query=True, attribute='rgbPP', id=id)
    #print 'Particle ID', id, 'Position:', myPos, 'Color:', myColor, 'visibilitySize:', visibilitySizePerPoint[id]
    v = visibilitySizePerPoint[id] / maxVisibility
    myColor = colorsys.hsv_to_rgb(v*.75, 1.0, 1.0)
    radius = radiusBase+0.01*v
    mySize = radius
    if visibilitySizePerPoint[id] < 3:
        myColor = [0.7, 0.7, 0.7]
        mySize = radiusBase
    #print(id)
    mc.particle(name, edit=True, attribute='rgbPP', order=id, vectorValue=myColor)
    mc.particle(name, edit=True, attribute='radiusPP', order=id, floatValue=mySize)