When you say "the first mesh", I think you mean the first shell? Your
script only runs on one mesh, but appears to be trying to deal with the
mesh one shell at a time.
Have you confirmed you script is correctly finding the shells? I can't
tell, by reading it. If the polygons are correct for the first shell, but
not correct after that, then I expect the problem is in the script that
separates the face indices into shells.
Here is a different version. I think it should do the same thing yours is
intended to do. It's written using API 2.0 so might require a few changes.
def mesh_to_shells(dp_node):
""" Returns a list of lists of face IDs. """
mfn_mesh = OpenMaya.MFnMesh(dp_node)
mit_poly = om.MItMeshPolygon(dp_node)
shells = []
already_sorted = set()
for id in range(mfn_mesh.numPolygons()):
if id in already_sorted:
continue
this_shell = [id]
# Starting with a single face, we keep adding connected face IDs to
# the end of the list, until we can't find any new ones.
id_within_shell = 0
while id_within_shell < len(this_shell):
mit_poly.setIndex(this_shell[id_within_shell])
id_within_shell += 1
connected_IDs = set(mit_poly.getConnectedFaces())
connected_IDs -= set(this_shell)
this_shell.extend(connected_IDs)
shells.append(this_shell)
already_sorted |= set(this_shell)
return shells
On Tuesday, 6 November 2018 02:09:15 UTC+11, Rémi Deletrain wrote:
>
> Hello everyone,
>
> I'm having fun with xGen and his exporter for UnrealEngine.
> I am trying to create the uv mesh it generates. So I made a script that
> detects each mesh and calculates the position in the UV space.
> Only I have a strange behavior in the UV editor. The indexes are good but
> the polygons are not correct after the first mesh.
>
> Do you know why?
>
> I enclose my script and scene test in this message.
>
>
>
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