A GLUTobject is an elementary 3D object which may be either a sphere, a cylinder or a disk.

kind, point, radius, radius2, direction and height

You define a GLUTobject by specifying its kind and by supplying its position and dimensions as its point, radius, radius2, direction and height properties, depending of the kind (see Smile's Dictionnary).

slices and stacks

The slices and stacks properties define the complexity of the GLUTobject.

drawmode

You can have a GLUTobject drawn filled or wired or both filled and wired by setting its drawmode property to 1, 2 or 3.

pen width

The pen width property is only effective for GLUTobjects drawn wired. The pen width depends also of the view3D's resolution.

ambiant color, diffused color, specular color, emission color, ambiant pen color, diffused pen color, specular pen color, emission pen color and shininess

You can change the material color properties of the GLUTobjects by settings its following properties: ambiant color, diffused color, specular color, emission color, ambiant pen color, diffused pen color, specular pen color, emission pen color and shininess.
fill color and pen color are shortcuts to define both ambiant and diffused colors for filled and wired display.