Here is a video of yesterday’s three hours worth of work plus two today:
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Scene shows the HUD of the player with marker around “bogey” position/distance and marker around intercept shot direction as well as “velocity compass”.
EDIT: Executable jar download: https://www.dropbox.com/s/engh0nt1gkwuqqh/spaceshooter.jar?dl=1 (requires at least OpenGL 2.0 and Java 1.6)
Standard output gives instructions how to fly.