yagv 0.4~20130422.r5bd15ed+dfsg-4 (amd64 binary) in ubuntu focal

 yagv is a fast 3D Gcode Viewer for Reprap-style 3D printers, in Python and
 OpenGL (via pyglet)
 .
 It has the following features:
  - Load large files painlessly
  - Select specific layers to look at
  - Colour segments according to function
  - Shows a full 3D view for better undersrtanding the G-code.