Python bindings for the Open Asset Import Library (ASSIMP)
A simple Python wrapper for Assimp using ctypes to access the library. Requires Python >= 2.6.
Python 3 support is mostly here, but not well tested.
Note that pyassimp is not complete. Many ASSIMP features are missing.
Complete example: 3D viewer
pyassimp comes with a simple 3D viewer that shows how to load and display a 3D model using a shader-based OpenGL pipeline.
To use it, from within /port/PyAssimp:
$ cd scripts $ python ./3D-viewer <path to your model>
You can use this code as starting point in your applications.
Writing your own code
To get started with pyassimp, examine the simpler sample.py script in scripts/, which illustrates the basic usage. All Assimp data structures are wrapped using ctypes. All the data+length fields in Assimp’s data structures (such as aiMesh::mNumVertices, aiMesh::mVertices) are replaced by simple python lists, so you can call len() on them to get their respective size and access members using .
For example, to load a file named hello.3ds and print the first vertex of the first mesh, you would do (proper error handling substituted by assertions …):
from pyassimp import * scene = load('hello.3ds') assert len(scene.meshes) mesh = scene.meshes assert len(mesh.vertices) print(mesh.vertices) # don't forget this one, or you will leak! release(scene)
Another example to list the ‘top nodes’ in a scene:
from pyassimp import * scene = load('hello.3ds') for c in scene.rootnode.children: print(str(c)) release(scene)
Install pyassimp by running:
$ python setup.py install
PyAssimp requires a assimp dynamic library (DLL on windows, .so on linux, .dynlib on macOS) in order to work. The default search directories are:
- the current directory
- on linux additionally: /usr/lib, /usr/local/lib, /usr/lib/x86_64-linux-gnu
To build that library, refer to the Assimp master INSTALL instructions. To look in more places, edit ./pyassimp/helper.py. There’s an additional_dirs list waiting for your entries.