ZDoom

I do need the ability to do different things in the HUD based on what type of armor the player is wearing so if that could be added that'd be great.

Interesting. See, I don't look at the source, because I wouldn't know where to look. Else I'd probably make much wiser feature suggestions and patches for them on the go.
Though... this isn't out of the question yet, I hope?

bool ABasicArmorPickup::Use (bool pickup)
{
	ABasicArmor *armor = Owner->FindInventory<ABasicArmor> ();

	if (armor == NULL)
	{
		armor = Spawn<ABasicArmor> (0,0,0, NO_REPLACE);
		armor->BecomeItem ();
		Owner->AddInventory (armor);
	}
	else
	{
		// If you already have more armor than this item gives you, you can't
		// use it.
		if (armor->Amount >= SaveAmount + armor->BonusCount)
		{
			return false;
		}
		// Don't use it if you're picking it up and already have some.
		if (pickup && armor->Amount > 0 && MaxAmount > 0)
		{
			return false;
		}
	}
	armor->SavePercent = SavePercent;
	armor->Amount = SaveAmount + armor->BonusCount;
	armor->MaxAmount = SaveAmount;
	armor->Icon = Icon;
	armor->MaxAbsorb = MaxAbsorb;
	armor->MaxFullAbsorb = MaxFullAbsorb;
	armor->ArmorType = this->GetClass()->TypeName;
	return true;
}

	armor->Icon = Icon;

[quote="Project Dark Fox"]Then how come an icon of what you're wearing shows up on both the full-screen and alternate HUDs?[/quote]
Simply put, the player has a BasicArmor item in his inventory. Inventory items have several properties, including one that's the icon.

Here is what happens when you use a BasicArmorPickup (keep in mind that armors from Doom and Heretic are used immediately when picked up):
[code]bool ABasicArmorPickup::Use (bool pickup)
{
ABasicArmor *armor = Owner->FindInventory<ABasicArmor> ();

if (armor == NULL)
{
armor = Spawn<ABasicArmor> (0,0,0, NO_REPLACE);
armor->BecomeItem ();
Owner->AddInventory (armor);
}
else
{
// If you already have more armor than this item gives you, you can't
// use it.
if (armor->Amount >= SaveAmount + armor->BonusCount)
{
return false;
}
// Don't use it if you're picking it up and already have some.
if (pickup && armor->Amount > 0 && MaxAmount > 0)
{
return false;
}
}
armor->SavePercent = SavePercent;
armor->Amount = SaveAmount + armor->BonusCount;
armor->MaxAmount = SaveAmount;
armor->Icon = Icon;
armor->MaxAbsorb = MaxAbsorb;
armor->MaxFullAbsorb = MaxFullAbsorb;
armor->ArmorType = this->GetClass()->TypeName;
return true;
}[/code]
Scroll down to see this line:
[code] armor->Icon = Icon;[/code]
So it's not the status bar code that knows which icon to use, it's simply the BasicArmor's icon that's updated.

Then how come an icon of what you're wearing shows up on both the full-screen and alternate HUDs?

While we're talking about armor and sbarinfo, I don't think sbarinfo has a way to know which armor type you are wearing -- since in your inventory, all you have is a [wiki=Classes:BasicArmor]BasicArmor[/wiki]. I added functions to identify armor type in [wiki=A_JumpIfArmorType]DECORATE[/wiki] and [wiki=GetArmorType]ACS[/wiki], but I didn't touch sbarinfo and I don't think it's been added to it since.

I have this disturbing imagination right now... what if the armor icon turns to face the direction of damage just like the mugshot...

(Picture an icon resembling a man's chest, constantly turning left and right)

XD

drawarmor [levels of condition], [maximum armor to honor], [X], [Y];

armor.icon [sprite]

It'll be a lot easier to do for editors than, say, a more "live" mugshot. But basically, think of an icon or graphic that degrades as it takes damage. One example is to put the shoulder pads of DoomGuy's green armor on, and as it absorbs more and more damage it gets worn down.
Each armor type would need its own set of icons/graphics instead of using one, so a line of DECORATE may be needed for SBARINFO to know what graphics to pull up -- and give the status bar that much more of an aesthetic appeal.

In SBARINFO:
[code]drawarmor [levels of condition], [maximum armor to honor], [X], [Y];[/code]
In DECORATE:
[code]armor.icon [sprite][/code]

Graphics would take a numeric approach like mugshots. GREEN0, 1, 2, 3, 4, etc.

Discuss.