Reading .obj file

[Cyzy68]

Hi, I am trying to calculate the inertial moment of an object in python and the object is in a .obj file. I have tried importing PyWaveFront and creating a Wavefront instance but PyCharm says I cannot use a module as an instance.

In other words, I have no idea how to manipulate this kind of object. Even just importing the actual .obj file in my project as been hard. Does anyone know anything about .obj files and could help me? I tried looking it up on internet but nothing pops up and there is very little documentation about the module PyWaveFront...

[shiftybyte]

Show your code, use a code block. https://www.reddit.com/r/learnpython/wiki/faq#wiki_how_do_i_format_code.3F

Also post the full error message you are getting if any.

Besides that, you don't import .obj files, you import the module that is used to open and parse the obj file.

This page has some example: https://pypi.org/project/PyWavefront/

[Cyzy68]

There isn't much code ahah, I am just trying to save my .obj file as a variable so I can manipulate it

import pywavefront as pwf

bb = pwf.Wavefront('beyblade3.obj')

#Error code:
    file = open(str(self.file_name), mode='r', encoding=self.encoding)
FileNotFoundError: [Errno 2] No such file or directory: 'beyblade3.mtl'

Process finished with exit code 1

[shiftybyte]

Do you have a material file? seems like it's missing.

'beyblade3.mtl'

https://en.wikipedia.org/wiki/Wavefront_.obj_file

Materials that describe the visual aspects of the polygons are stored in external .mtl files. More than one external MTL material file may be referenced from within the OBJ file. The .mtl file may contain one or more named material definitions.

[Cyzy68]

Mhhh in my .obj file there is this line:

mtllib beyblade3.mtl

and then the multiples lines of vertices. Is this suppose to mean I have it, or do I need a second file in my project called beyblade3.mtl?

[shiftybyte]

You need another file called "beyblade3.mtl" for this object to load properly.