The following script gets you the world position from a random uv-coordinate of
the selected object.
I affraid I don't know what you mean with symmetry line.
import maya.OpenMaya as om
import maya.cmds as cmds
import random
def GetDagPath(nodeName):
sel = om.MSelectionList()
om.MGlobal.getSelectionListByName(nodeName, sel)
dp = om.MDagPath()
sel.getDagPath(0,dp)
return dp
def UvCoordToWorld(U, V, mesh):
mfnMesh = om.MFnMesh(GetDagPath(mesh))
numFaces = mfnMesh.numPolygons()
WSpoint = om.MPoint(0.0,0.0,0.0)
util2 = om.MScriptUtil()
util2.createFromList ((U, V),2)
float2ParamUV = util2.asFloat2Ptr()
for i in range(numFaces):
try:
mfnMesh.getPointAtUV(i,WSpoint, float2ParamUV, om.MSpace.kWorld)
break; #point is in poly
except:
continue #point not found!
return WSpoint
f = UvCoordToWorld (random.random(), random.random(),
cmds.ls(sl=True,type='shape'))
print [f[0], f[1], f[2]]
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