This is a fast 3D Gcode Viewer for Reprap-style 3D printers, in Python and OpenGL (via pyglet)It was written since I could not find a visualizer that fitted my needs, i.e:Designed in Ubuntu Linux; Expected to work in any Linux, Windows or OS XFull code at https://github.com/jonathanwin/yagv and attachedyagv [file.gcode]Supplied demo gcode is a slice of http://www.thingiverse.com/thing:5176 (loaded if called with no file)Since I started this, hudbrog published his very nice GCode Analyzer/Visualizer; check it out: http://www.thingiverse.com/thing:35248Download and unzip the program.Install python 2 and pyglet.Make sure the yagv file is executable, run "./yagv [file.gcode]" Alternatively, setup a symlink to the yagv executable in your PATH, or add the yagv folder to the PATHUnder Windows, you may need to run "python path\to\yagv file.gcode" instead (feedback welcome)