def setup(delta_col, delta_row, pos, cosines)
      # Set up the provided parameters:
      self.delta_col = delta_col
      self.delta_row = delta_row
      self.pos = pos
      self.cosines = cosines
      # Set up the dimensional parameters:
      @columns, @rows = self.shape
    end
def setup(delta_col, delta_row, pos, cosines)
      # Set up the provided parameters:
      self.delta_col = delta_col
      self.delta_row = delta_row
      self.pos = pos
      self.cosines = cosines
      # Set up the dimensional parameters:
      @columns, @rows = self.shape
    end
Sets up the instance variables.