The core module, with the signature Model class, represent a set of fairly traditional 3D library classes on a slightly higher abstraction level than the WebGL2 API, that can serve as the basic building blocks for most applications.

Also contains a limited scene graph system that provides primitive hierarchy of 3D objects with positioning, grouping, traversal and scene support.

Model - A renderable object with attributes and uniforms. |
Geometry - Holds attributes and drawType for a geometric primitive |
Group - Supports recursive travesal and matrix transformation |
AnimationFrame - render loop / app life cycle support |
Object3D - Base class, golds position, rotation, scale (TBD) |

Note the Model class is in many ways the quintessential luma.gl class. It ties together many concepts in luma.gl and is a good place to start reading if you are new to the framework.