text: from .feature import Feature
  
  
  class Feature2v(Feature):
      def __init__(self, x: int, y: int, width: int, height: int):
          super().__init__(x, y, width, height)
          hh = height // 2        
          self.coords_x = [x,      x + width,  x,          x + width,
                           x,      x + width,  x,          x + width]
          self.coords_y = [y,      y,          y + hh,     y + hh,
                           y + hh, y + hh,     y + height, y + height]
          self.coeffs   = [-1,     1,          1,         -1,
                           1,     -1,         -1,          1]
  