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Here's a quick demo of a 6 degree of freedom 3D engine that I have been working on.
You can just explore a small space station in a Descent-like style.
Controls
Z: Thrust
Arrow Keys: Turn
X+Arrows: Roll
Notes
The map is stored in a long string and is generated from a Blender OBJ file. The station is as complex as I can make it before running out of compressed code space. To make something larger, I think I would have to switch to more of a 3D tile system with room building blocks that snap together.
The engine uses a simplified portal system paired with convex sectors to determine room visibility and draw order.
Thanks
Thanks to Fred72 for the polyfill code. (https://www.lexaloffle.com/bbs/?tid=3393)
Updates: fixed some code that broke with version 2.5g
https://bxt.org/gldmi