[script] extract vertices, face (vert index), and normals of the faces

Coding Python Support
1

i’m new to python, nut not to programming.
i have many difficulties looknig at the documentation.
i’m trying to make a simple script that prints vertices, face index, and normals of the

faces.mesh=bpy.data.meshes["Cube"]
face=mesh.faces
for f in face
   print(f.verts)

but this leads to this error: MeshFace object has no attributre ‘verts’…
looking here:
http://www.blender.org/documentation/blender_python_api_2_57_release/bpy.data.html
i’m not seeing anything, perhaps i’m looking at the wrong page
in an old documentation:
http://www.blender.org/documentation/248PythonDoc/
seems that verts is a property of MFace
i really don’t know where to find the right reference and how to search it…
can someone point me to the right direction?
thanks

2

assuming you are running this code in some recent version of blender (2.58…)
(but the error message looks like it’s being run in a 2.49 version or something, so the following code will be of no use to you)

your for loop misses a colon. i’ve written at length about this kind of stuff:

  1. blenderscripting.blogspot.com/python-printing-vertex
  2. blenderscripting.blogspot.com/search/label/Faces

with one face selected, in editmode… go to object mode and run this in the console


import bpy

current_object = bpy.context.active_object
selected_faces = [face for face in current_object.data.faces if face.select]

# shows you what you can do with 'selected_faces'
print(dir(selected_faces[0]))

# print the normal of the first item in selected faces
print(selected_faces[0].normal)
3

thanks, i’ll try
my version is 2.57.1r36339

4

tryied all ok.
but can be automated the print of normals as the faces and vertex?
or should i select a face and run the script every time?
thanks

5

there is no pre written function that i know of in bpy that does that, but i would use something like :


import bpy

current_obj = bpy.context.active_object

print("="*40) # printing marker
for face in current_obj.data.faces:
    verts_in_face = face.vertices[:]
    print("face index", face.index)
    print("normal", face.normal)
    for vert in verts_in_face:
        print("vert", vert, " vert co", current_obj.data.vertices[vert].co)
6

you are very expert!
thank you!!!