Get color per face/vertex?

[Anonymous]

So I have a sphere that I've assigned the default ramp to (blue - green - red) and I'm trying to obtain the color at each vertex; HOWEVER, when I call cmds.polyColorPerVertex() every vertex's color is black (0,0,0), unless I set it using the same command first.

Is there a way to sample color by vertex (or face) from a poly object stricly based off of it's shader's properties?

- forni

[Anonymous]

You should use the colorAtPoint command instead.

[Anonymous]

Given a point on the surface of my shape (ie. a vertex in this case) how do I obtain the UV coordinates of corresponding point in world space so that I may use color at point? Is there an easy way to do this?

[kurianos]

import maya.cmds as cmds

def getSelectedVertexColor(colorNode):
    getCurrentVertex=cmds.ls(sl=True)
    for eachVertex in getCurrentVertex:

        convertVTX = cmds.polyListComponentConversion(eachVertex,fromVertex=True,toUV=True)

        getUVValue = cmds.polyEditUV(convertVTX,q=True)

        getVertexColorVal=cmds.colorAtPoint(colorNode,o='RGB',u=getUVValue,v=getUVValue)

        print getVertexColorVal

getSelectedVertexColor('ramp1')

hope will help you