glePolyCylinder ‐ Draw polycylinder, specified as a

void glePolyCylinder(int npoints,
                     gleDouble point_array[][3],
                     float color_array[][3],
                     gleDouble radius);

npoints   numpoints in poly‐line

          polyline vertices

          colors at polyline verts

radius    cylinder radius

Draw polycylinder, specified as a polyline.

Note that neither the very first segment, nor the very last
segment are drawn. The first and last segments serve only to
define the angle of the join at the very ends of the
polyline. Thus, to draw one segment, three must be
specified. To draw two segments, four must be specified,

The color array may be NULL. If NULL, the current color is
used. If not NULL, the glColor3f() routine is used to set
the color; therefore, specifying the glColorMaterial()
subroutine before this primitive can be used to set diffuse,
specular, ambient, etc. colors.

By default, the cross‐section of the cylinder is drawn as a
20‐sided polygon.  This number can be changed using the
gleSetNumSides() routine.

glePolyCone, gleSetNumSides

Linas Vepstas (