I've gotten kind of bored with DooM so I haven't done that much on it. The only real advancment has been that weapons are now not a complete hack, which has allowed me to add weapon animations and their projectiles.
So far I've only implemented the chaingun and plasma rifle, implementing weapons is sooooooooooooooo boring.
The rifle actually does generate the "plasma ball" projectile, but you can hardly see it in the animation.