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

cpe::camera	Storage of a camera and screen parameters
cpe::color	Container class for (r,g,b) color. Each component is an integer (in [0,255])
cpe::exception_color	Exception class for color
cpe::exception_cpe	General exception class
cpe::exception_image	Special exception class for image
cpe::exception_p2d	Exception class for p2d
cpe::exception_scene3d	Special exception class for v3
cpe::exception_v3	Special exception class for v3
cpe::image	Container for picture data. Data are stored as unsigned char [0,255]
cpe::image_io	Helper class for I/O
cpe::intersection_data	Container for intersection data (position, normal, and relative position with respect to the ray)
cpe::intersection_object	Container class to store intersection + associated material of the current object
cpe::light	Container of a light
cpe::material	Material associated to a given object (color+shading data)
cpe::object3d	Generic container of a shape with intersect method
cpe::p2d	Container for 2D integer positions (pixel position)
cpe::plane	Object3d of type (infinite) Plane (position+normal). Analytically compute intersection with a ray
cpe::ray	Straight ray (initial position + direction) used for ray-tracing algorithm
cpe::ray_tracer	Helper class for running ray-tracing algorithm
cpe::render_parameters
cpe::scene3d	Container of object3d+material and light to define a 3D scene
cpe::shading	Container for shading parameters (ambiant,diffuse,specular)
cpe::sphere	Object3d of type Sphere (center+radius). Analytically compute intersection with a ray
cpe::v3	Vectors/Points 3D
cpe::vertex	Container for a vertex (position+normal+color)
cpe::vertex_shader	Helper class that compute the color of a vertex given a normal, shading and light parameters