Architecture
This is an overview of the architecture of Eidolon, illustrated by the diagram below. Most of the code is implemented in Python with some data structures and binding code implemented in C++ and Cython. The overall objective of the architecture is to separate the compiled layers from the Python, implement a GUI-based system which maintains the Model-View-Controller (MVC) separation between the components, and provide a clean plugin interface permitting extension code to access and augment components of the system.
Eidolon relies on only a few external compiled dependencies, namely Qt and Ogre3D. The first of these two is accessed through PyQt, which is found in the binding layer, and is not therefore represented by code in this layer.
Ogre3D (Open-source Graphics Rendering Engine) is a cross-platform rendering library using OpenGL or DirectX. It provides facilities for accessing these APIs, managing resources, and implementing a fast flexible rendering pipeline. Eidolon integrates with Ogre3D by subtyping Ogre classes in OgreRenderTypes to present simplified wrappers for renderer objects, as well as provide a simple scene manager interface. This module is the only component of Eidolon where third-party compiled code is directly interfaced at the C++ level.