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myk said:
The placement of Doom95 is kind of wrong. It seems to be based on the sources for the executable of The Ultimate DOOM, but with the text string data for the Final DOOM IWADs. Final DOOM and Doom95 were released more or less about the same time, and Doom95 lacks the teleporter bug found in the Final DOOM executable. Its story is similar to that of the Linux source release (based on v1.9u, but with info for Final DOOM).

ZDaemon comes from csDoom, although its network code was rewritten for v1.0 (but some stuff might still be csDoom-based), and at one point Skulltag used ZDaemon network code. Even if a lot of changes were made, these are historically related as far as development is concerned.

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DaniJ said:
Sorry to be a pain but that still doesn't look right for Doomsday. The updated graph implies that Doomsday is based on Hexen, which is not correct. The Doomsday engine was created by separating out of the game plugins, common functionality that had been written for jHexen originally (and then ported to jDoom and jHeretic) plus various bits such as the blockmap stuff which was taken from jDoom.

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The Doomsday site said Doomsday is based off Hexen though, just to inform you!

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myk said:
A line goes from Quakeworld to ZDoom, although I think ZDoom took some stuff from Quake and Quake2 (maybe for the console and HUD)... I can't be exact on this.

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skadoomer said:

Some Networking code was taken from quake, and the railgun was taken from quake 2.

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Graf Zahl said:
Where's Strife on that graph?

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GhostlyDeath said:


What is strife based off anyway? And also, No doom port will ever get a line from it since there is no strife source code available for anyone.

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Graf Zahl said:



Having the source is not the only way to get at the code. ;)

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GhostlyDeath said:


:O Assembly cut in paste/porting will only get a dotted line though...

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Gez said:


Actually looked like full reverse engineering. Some Strife code pointers had (until recently) names like A_24d0e or such -- I thought decompilers could only produce assembly code, but that's not the kind of function name I imagine a human mind to come up with.

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Gez said:


Actually looked like full reverse engineering. Some Strife code pointers had (until recently) names like A_24d0e or such -- I thought decompilers could only produce assembly code, but that's not the kind of function name I imagine a human mind to come up with.

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skadoomer said:

Some Networking code was taken from quake, and the railgun was taken from quake 2.

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DaniJ said:
I take it you mean the archived homepage? The statement on the about page is a bit of a misnomer actually. In the same sense it is also based on DOOM, Heretic and Hexen. As you can see, the relationship is somewhat complicated but when it says it is based on Hexen, it really means it is based on the new code written for jHexen but that isn't nearly as succinct (however invalid).

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leileilol said:

Zdoom does not use any Quake2 code

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leileilol said:
This thread is about inheritance of origin. Doomsday is originally based off the Hexen source. This is a fact.

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DaniJ said:
If you want to interpret it that way, then sure, Doomsday is based on Hexen. However, if you actually look at the source, you'll find no Hexen code in there.

A slight mistake in the new graph:
Officially, Risen3D is based on Doomsday 1.7.8 though it actually forked much earlier than that under the name Boomsday.

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