Stick points to closest point on a specified mesh

stick_points_to_mesh.py

from maya import OpenMaya
import pymel.core as pm

def mdagpath_from_name(name, extend_to_shape=False):
    if not pm.objExists(name):
        raise MayaNodeError, name
    slist = OpenMaya.MSelectionList()
    slist.add(name)
    dagpath = OpenMaya.MDagPath()
    slist.getDagPath(0, dagpath)
    if extend_to_shape:
        dagpath.extendToShape()
    return dagpath

def stick_points_to_closest_mesh(tgt_obj, dfm_obj):
    # target object to stick
    meshfn = OpenMaya.MFnMesh(mdagpath_from_name(tgt_obj, True))
    result = OpenMaya.MPoint()
    space = OpenMaya.MSpace.kWorld
    # source points
    vtxs = pm.ls('%s.vtx[*]' % dfm_obj, fl=True)
    npoints = len(vtxs)
    for i, vtx in enumerate(vtxs):
        if i % 10 == 0:
            print('[PROGRESS] %04d / %04d' % (i+1, npoints))
        p = vtx.getPosition(space='world')
        meshfn.getClosestPoint(OpenMaya.MPoint(p.x, p.y, p.z), result, space)
        vtx.setPosition(pm.dt.Point(result.x, result.y, result.z), space='world')
    print('# Done')

stick_points_to_closest_mesh('pCube1', 'pSphere1')