def pointOnPolyHelper(maintainoffset=1):
'''
utilites the built in maya command but maintains offset and
adds a nearesPointOnSurface node to get hold of the correct UV values
'''
from ezLib.list import uniquify
from maya.cmds import *
sel = ls(sl=1)
shape = uniquify(ls(ls(sel, s=1, o=1, dag=1), type='mesh'))
shapeTrans = uniquify(listRelatives(shape, parent=1))
if len(shapeTrans) > 1:
raise IOError, 'multiple mesh transforms! Select the shape that you want to attach to directly!'
shapeTrans = shapeTrans[0]
# check for underworld shapes
nonIntermediates = []
if len(shape) > 1:
for s in shape:
if not getAttr(s + '.intermediateObject'):
nonIntermediates.append(s)
if len(nonIntermediates) > 1:
raise IOError, 'multiple visible mesh shapes selected! Select the shape that you want to attach to directly!'
shape = nonIntermediates[0]
tr = ls(sel, tr=1)
if tr.count(shapeTrans):
tr.remove(shapeTrans)
npom = createNode('nearestPointOnMesh')
connectAttr(shape + '.worldMesh[0]', npom + '.inMesh')
for t in tr:
tpos = xform(t, q=1, t=1)
trot = xform(t, q=1, ro=1)
setAttr(npom + '.inPosition', tpos[0], tpos[1], tpos[2])
nuv = [getAttr(npom + '.parameterU'), getAttr(npom + '.parameterV')]
# selection order is important!
select(shape, t)
maya.mel.eval('performPointOnPolyConstraint 0;')
# get new constraint
popc = listRelatives(t, type='constraint')[0]
setAttr(popc + '.' + shapeTrans + 'U0', nuv[0])
setAttr(popc + '.' + shapeTrans + 'V0', nuv[1])
if maintainoffset:
npos = getAttr(npom + '.position')[0]
setAttr(popc + '.offsetTranslate', tpos[0] - npos[0], tpos[1] - npos[1], tpos[2] - npos[2])
delete(npom)
select(sel)
def selObjectsFromShaderWithinSelection(shader): from maya.cmds import ls, polyListComponentConversion, listConnections, select, sets from ezLib.list import uniquify selShapes = ls(sl=1, s=1, o=1, dag=1) selFaces = ls(polyListComponentConversion(tf=1), fl=1) selSGs = uniquify(listConnections(selShapes, type='shadingEngine')) inSGs = listConnections(shader, type='shadingEngine') # get only SGs that are connected to the shaders in question # and are connected to the selected surfaces inSGs = [sg for sg in inSGs if sg in selSGs] print 'inSGs:' + str(inSGs) # get remaining faces that are: connected to incoming shaders # and in selection inSGFaces = ls(polyListComponentConversion(sets(inSGs, q=1), tf=1), fl=1) faces = [f for f in selFaces if f in inSGFaces] select(faces)