Oh thanks Adam for that...
i wouldn't have got that.
so i also tried assigning the GetNormals() but that returns a status to
so i guess thats out to?
i guess the only other option is MfnMesh.GetVertexNormal?
or is that a status object to?
his there a way in python api to get normals? i would like to maybe use
normal in a Deformer node at some point.
john
Adam Mechtley wrote:
The problem is this line:
vector = meshIter1.getNormal(normal, ObjectSpace)
getNormal returns an MStatus object, which Python does not use, and which
will cause Maya to crash unfortunately if you try to capture it in Python.
Depending what you are wanting to do btw a better approach is:
normals = OM.MVectorArray()
meshIter1.getNormals(normals, OM.MSpace.kObject)
Thus you get all the normals in a single API call instead of looping through
the whole thing and can then do whatever with them in Python. The more API
calls you have, the more translation happens across the SWIG layer, which
will cause your code to execute slower.
On Fri, Apr 9, 2010 at 8:27 AM, johnvdz <[email protected]> wrote:
Hi all,
just trying the get the Normal direction of a vertex so i can offset a
point locally from its Normal.
at the moment i cant get a value from the Normal at all?
import maya.OpenMaya as OpenMaya
import maya.OpenMayaMPx as OpenMayaMPx
selList = OpenMaya.MSelectionList()
OpenMaya.MGlobal.getActiveSelectionList(selList)
dag1= OpenMaya.MDagPath()
selList.getDagPath(0,dag1)
meshIter1 = OpenMaya.MItMeshVertex(dag1)
ObjectSpace=OpenMaya.MSpace.kObject
while not meshIter1.isDone():
p1 = meshIter1.position(ObjectSpace)
print p1.x,p1.y,p1.z
normal=OpenMaya.MVector()
vector = meshIter1.getNormal(normal, ObjectSpace)
meshIter1.next()
at the moment this crashes maya after it has finished the loop. i think its
because i normal=OpenMaya.MVector() is inside the loop.
i have tried this outside the loop but i get "None" as a Print result of
'vector'. I'm pritty new to API so i could have done a few things wrong.
anyway any answers would be appreciated
john
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