Hi,
although this is quite an old thread, I wanted to post a work around for
the sake of completeness
<http://www.dict.cc/englisch-deutsch/for+the+sake+of+completeness.html>:
import maya.OpenMaya as om
import maya.cmds as cmds
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 (0.5, 0.5, 'pSphereShape1')
print [f[0], f[1], f[2]]
Cheers!
On Monday, 16 March 2009 19:35:30 UTC+1, LeonTheProfessional wrote:
>
> Hi all,
>
> I am trying to use the getPointAtUV function from python, but get this
> error:
>
> Code:
>
> # Error: (kFailure): Object does not exist
> # Traceback (most recent call last):
> # File "<maya console>", line 23, in <module>
> # File "<maya console>", line 20, in UvCoordToWorld
> # RuntimeError: (kFailure): Object does not exist #
>
> The code is this:
>
> Code:
>
> import maya.OpenMaya as mayaSDK
> import maya.cmds as maya
>
> def GetDagPath(nodeName):
> sel = mayaSDK.MSelectionList()
> mayaSDK.MGlobal.getSelectionListByName(nodeName, sel)
> dp = mayaSDK.MDagPath()
> sel.getDagPath(0,dp)
> return dp
>
> def UvCoordToWorld(U, V, mesh):
> mfnMesh = mayaSDK.MFnMesh(GetDagPath(mesh))
> numFaces = mfnMesh.numPolygons()
> WSpoint = mayaSDK.MPoint(0.0,0.0)
>
> util2 = mayaSDK.MScriptUtil()
> util2.createFromList ((U, V),2)
> float2ParamUV = util2.asFloat2Ptr()
>
> mfnMesh.getPointAtUV(0, WSpoint, float2ParamUV,
> mayaSDK.MSpace.kWorld)
>
> return WSpoint
>
> f = UvCoordToWorld (0.5, 0.5, 'lowreshead')
> print [f[0], f[1]]
>
>
> Anyone knows how to do this properly. Maya python is very annoying.
>
>
>
>
> Thanks,
> Light
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