# File lib/bio/graphics/glyphs/dot.rb, line 22
    def draw
      raise "Start and stop are not the same (necessary if you want triangle glyphs)" if @subfeature.start != @subfeature.stop
      
      @radius = Bio::Graphics::FEATURE_HEIGHT/2
      @feature_context.circle(self.left_pixel + @radius, @radius, @radius).fill
      @feature_context.close_path.stroke
    end