Constructors and Setting Functions

void Reg_Polygon (void)

Default constructor

Creates an empty Reg_Polygon.

void Reg_Polygon (const Point& ccenter, const unsigned short ssides, const real ddiameter, [const real angle_x = 0, [const real angle_y = 0, [const real angle_z = 0]]])

Constructor

Creates a Reg_Polygon in the x-z plane, centered at the origin, with the number of sides specified by ssides and with radius = ddiameter / 2. The Reg_Polygon is rotated about the x, y, and z-axes in that order by the angles given by angle_x, angle_y, and angle_z, respectively, if any one of them is non-zero. Finally, the Reg_Polygon is shifted such that its center is located at ccenter. Reg_Polygon r(origin, 3, 2.75, 10, 15, 12.5); r.draw(); Fig. 145.

void set (const Point& ccenter, const unsigned short ssides, const real ddiameter, [const real angle_x = 0, [const real angle_y = 0, [const real angle_z = 0]]])

Setting function

Corresponds to the constructor above. A Reg_Polygon can theoretically have any number of sides, however I haven't tested it for unreasonably large values. The following example demonstrates that set() can be used to change a Reg_Polygon. Reg_Polygon r; real j = .5; for (int i = 3; i <= 16; ++i) { r.set(origin, i, j); r.draw(); j += .5; } Fig. 146.

Reg_Polygon* create_new<Reg_Polygon> (const Reg_Polygon* r)

Template specializations

Reg_Polygon* create_new<Reg_Polygon> (const Reg_Polygon& r)

Pseudo-constructors for dynamic allocation of Reg_Polygons. They create a Reg_Polygon on the free store and allocate memory for it using new(Reg_Polygon). They return a pointer to the new Reg_Polygon. If r is a non-zero pointer or a reference, the new Reg_Polygon will be a copy of r. If the new object is not meant to be a copy of an existing one, 0 must be passed to create_new<Reg_Polygon>() as its argument. See Dynamic Allocation of Shapes, for more information.