Normal vector of plane always same even after rotation

@Mr_Sinter wrote:

Hi @all,

i would like to measure the normal-vector of a plane before and after rotation.

I only want those surfaces of a brep, which normal-vector in z-dir is -1 and lie at z=0:

for face in brep.Faces:
    plane_of_face = face.TryGetPlane()
    if int(plane_of_face[1].Normal[2]) == -1 and plane_of_face[1].OriginZ == 0:
      brepface_znormal1 = face

So my variable "brepface_znormal1" is the one which normal-vector I want to observe after rotation (user rotates and quits with "ESC").
Therefore I defined a function which gets called when Rhino fires "EscapeKeyPressed"-Event:

def escape_key_pressed(a, b):
   znormal1_plane_of_face = brepface_znormal1.TryGetPlane()
   print "brepface_znormal1 normal-vector: %s"%znormal1_plane_of_face[1].Normal
rhi.RhinoApp.EscapeKeyPressed += escape_key_pressed

"znormal1_plane_of_face[1].Normal" should give me a new Normal-Vector (after rotation), but I get same values as before the rotation....!?
I even tried it over GUID to identify the plane I want to observe, but this doesnt work either.

Who finds the error?

Kind Regards
Mr Sinter

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