ZDoom

added

That's not how flags work.

That's not how bit flags work.

Yea, the XF_HURTSOURCE part of A_Explode could just allow for other numbers between 0 and 1 to accomplish this effect.

It's handled by the player themselves. It's treated as a suicide condition.

As an aside, I'm not even sure if falling damage is sourced by the inflictee. It wouldn't surprise me if it's dealt by the world, like sector damage.

There's no workaround that covers exactly what this property is suggesting, since the primary draw of this would be (as stated in the OP) damagetype-independent resistance to one's own explosive attacks that doesn't affect any other targets.

Even though MUHMUHFLUH isn't a multiplayer-focused port (though it's making strides), the clearest illustration would be a rocket launcher that's meant to deal reduced damage to self but full damage to other players in deathmatch. Right now, either you can completely negate the damage with XF_HURTSOURCE turned off, or offer [i]all[/i] players explosive resistance; you can't do something like make the shooter take quarter-damage and the rest of the players take full.

IMO, though, the most fitting way to implement this is on projectiles (probably renamed to ShooterDamageFactor or somesuch since the definition "self" breaks down) or (probably better) as an additional A_Explode parameter. As mentioned, the only other "self damage" concept (that I can think of) is falling damage, which can already be adjusted with DamageFactor. Putting the new feature on the projectile or function call offers maximum flexibility.

[quote="GhostKillahZero"][quote="Rowsol"]This would be useful.[/quote]
Really? In what way would this be useful? [wiki]A_Explode[/wiki] and falling damage might be the only two factors that you can damage yourself, I'd say no to this one.[/quote]
Well, I did specifically mention its use in A_Explode, and one of the ways I thought it could be implemented would be as a parameter to that. Currently the only mitigation to it is all or nothing, plus the nothing option doesn't allow explosion jumping and such. I imagine it's because setting hurtshooter to false excludes the firer from the explosion calculations entirely, rather than just nullifying the damage.

[quote="Rowsol"]This would be useful.[/quote]
Really? In what way would this be useful? [wiki]A_Explode[/wiki] and falling damage might be the only two factors that you can damage yourself, I'd say no to this one.

This would be useful.

[quote="Graf Zahl"]For explosive damage such a property already exists (RadiusDamageFactor).[/quote]Doesn't this apply to all radius damage, not just one's own?

For explosive damage such a property already exists (RadiusDamageFactor).
For other things it's probably not so useful, considering that you can't easily damage yourself with projectiles and hitscans.

I'd like it if the was the option for an actor to take modified damage from its own sources, whether linked to a damage type akin to DamageFactor or hooked into A_Explode, since that seems like the only way for an actor to actually damage itself while still being able to be the source of it.

The first use that comes to mind and my primary purpose is allowing explosive weapons to explode their users less than their targets, making point-blank blasts less lethal and explosive jumping less dumb. The opposite being done I could see also getting some use, punishing careless players with increased blowback damage.

The reason why just a standard DamageFactor is not enough is because other players' weapons would also be affected, which is what I'm trying to avoid.