L4D2 BSP Decompiling

[omnicoder]

Dunno if anyone really needs this but I've made a program that pre-processes L4D2 maps and makes a copy VMEX can decompile.

Download link is on the bottom of the VMEX page on the dev wiki.

[Terr]

I've got a small hand in the game of interpreting the BSP format... what were the high-level things it needed to handle?

[omnicoder]

I've got a small hand in the game of interpreting the BSP format... what were the high-level things it needed to handle?

It just changes the version number from 21 to 20 and writes a new header with the lump version code moved down from first to third.

http://developer.valvesoftware.com/wiki ... ile_Format is a great resource for this.

[Habboi]

Very handy. Good job mate.

[Terr]

writes a new header with the lump version code moved down from first to third.

Thanks, that's significant since I parse some of the game lumps. I must've started the code before that revision occurred.

[omnicoder]

writes a new header with the lump version code moved down from first to third.

Thanks, that's significant since I parse some of the game lumps. I must've started the code before that revision occurred.

Yeah it incorrectly said that an extra value was added to the base header when the version lump just got moved up.