Method: RGL::Graph#write_to_graphic_file

Defined in:
lib/rgl/dot.rb

#write_to_graphic_file(fmt = 'png', dotfile = "graph", options = {}) ⇒ Object

Use dot to create a graphical representation of the graph. Returns the filename of the graphics file.



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# File 'lib/rgl/dot.rb', line 116

def write_to_graphic_file(fmt = 'png', dotfile = "graph", options = {})
  src = dotfile + ".dot"
  dot = dotfile + "." + fmt

  File.open(src, 'w') do |f|
    f << self.to_dot_graph(options).to_s << "\n"
  end

  unless system("dot -T#{fmt} #{src} -o #{dot}")
    raise "Error executing dot. Did you install GraphViz?"
  end
  dot
end