glMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, col);
polys += createCylinder(ci, b[n]->len*l, radius*1.05, 0, 0); /* band */
glPopMatrix();
glMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, col);
polys += createCylinder(ci, b[n]->len*l, radius*1.05, 0, 0); /* band */
glPopMatrix();