# File lib/bio/graphics/glyph.rb, line 245
  def self.up_triangle(args) #:x, :y, :width :fill, :stroke :stroke_width, :style, :height
    args = {
      :height => 10, 
      :fill_color => 'red', 
      :stroke => "black", 
      :stroke_width => 1, 
      :style => "fill-opacity:0.4;"}.merge!(args)
      args[:points] = "#{args[:x]},#{args[:y] + args[:height]} #{args[:x] + args[:width]},#{args[:y] + args[:height]} #{ args[:x] + (args[:width]/2) },#{args[:y] }"
    [Bio::Graphics::Primitive.new(:polygon, args)]
  end