Here are the classes, structs, unions and interfaces with brief descriptions:

CAngryDudeApp	Main class of the sample
CAnimationKey
CBone
CDualQuaternion
CMesh
CMeshGL
CModelNode
CNodeAnimation
CQuaternion	Quaternions are an extension of real numbers used to represent rotations in 3D
CSkinnedModel
CSkinnedModelGL
CVertex