public CRectangle(int pen_width, Color pen_color, TPoint left_top_corner, int width, int height) : base(pen_width, pen_color) { this.left_top_corner = left_top_corner; this.width = width; this.height = height; }
public CLine(int pen_width, Color pen_color, TPoint point_a, TPoint point_b) : base(pen_width, pen_color) { this.point_a = point_a; this.point_b = point_b; }
public CEllipse(int pen_width, Color pen_color, TPoint center, int radius_a, int radius_b) : base(pen_width, pen_color) { this.center = center; this.radius_a = radius_a; this.radius_b = radius_b; }