Versions

• Made "Save" command handle block scenes.
• Unified "Load" and "Load Geom" commands.
• Implemented round platforms in 4D.
• Added viewinfo command to set start position.
• Added various other minor commands.
• Added minimal validation of object dimensions.
• Fixed problem with game locking up.
• Mostly fixed problem with keys getting stuck.
• Added the geom3 and train3 examples.
• Added train-helix4e to Train Examples.
• Added the 120-cell to Contributed Examples.
• Added shape reference page.

Version 4 - 2013-12-24

Major new features:

• Added block motion.
• Added block collision detection.
• Added block insert and delete.
• Added block scramble function.
• Added elevated trains.
• Added scenery.
• Added custom textures.
• Added fisheye mode.
• Added a bunch of examples and documentation.
• Added "page up" and "page down" controls.

Minor changes:

• Added keyboard control to turn block separation on and off.
• Added composite shapes.
• Made more large improvements to the "what's in front" algorithm.
• Improved the axis alignment algorithm.
• Added line number and current token to scene language errors.
• Revised the include file system.
• Added % prefix for binary numbers.
• Added genpoly command.
• Added arithmetic and various other minor commands.
• Made brown a predefined color.
• Added "t" instruction for building tracks.
• Fixed a bug when losing focus.
• Fixed a bug in the shape rotation function.

Version 3 - 2013-11-03

• Added trains and everything related to trains.
• Added a bunch of examples and documentation.
• Added texture 0 colorization.
• Added new geometry commands (rotate, altrot, altpoly, frustum).
• Added symbolic constants for colors, axes, and directions.
• Added "reload" menu command.
• Made two large improvements to the "what's in front" algorithm.
• Fixed it so you can't get stuck inside blocks.

Version 2 - 2013-10-16

• Added clipping.
• Added new geometry commands (scale, glass, polygon, prism, cone).
• Made blocks obstruct user motion.

Version 1 - 2013-09-30

• The original version, with no clipping except backface culling.