Panda3D implements a superclass called
PandaNode, from which many other classes inherit. Collectively, all of these classes are referred to as nodes. Some examples include
ModelRoots, which are the root of models (surprise!),
GeomNodes, which store vertex data and other information for geometry,
CameraNodes, which serve as the windows through which we see the world within Panda3D,
CollisionNodes, which allow items in that world to interact with one another, and there are many more. Each of these node types have methods specific to them for setting attributes that only node type require.
ModelRoots don't have methods for setting lens attributes, but
There are also attributes that every kind of node needs, such ...