getactorclass

This function, along with the string array, returns the class name for any Doom 1 & 2 spawnable thing in the form of a string.

str Class[105] = {

"ShotgunGuy",
"ChaingunGuy",
"BaronOfHell",
"ZombieMan",
"DoomImp",
"Arachnotron",
"SpiderMastermind",
"Demon",
"Spectre",
"DoomImpBall",
"Clip",
"Shell",
"Cacodemon",
"Revenant",
"Bridge",
"ArmorBonus",
"Stimpack",
"Medikit",
"Soulsphere",
"Shotgun",
"Chaingun",
"RocketLauncher",
"PlasmaRifle",
"BFG",
"Chainsaw",
"SuperShotgun",
"Rock1",
"Rock2",
"Rock3",
"Dirt1",
"Dirt2",
"Dirt3",
"Dirt4",
"Dirt5",
"Dirt6",
"PlasmaBall",
"RevenantTracer",
"SGShard1",
"SGShard2",
"SGShard3",
"SGShard4",
"SGShard5",
"SGShard6",
"SGShard7",
"SGShard8",
"SGShard9",
"SGShard0",
"GreenArmor",
"BlueArmor",
"Cell",
"BlueCard",
"RedCard",
"YellowCard",
"YellowSkull",
"RedSkull",
"BlueSkull",
"ArchvileFire",
"StealthBaron",
"StealthHellKnight",
"StealthZombieMan",
"StealthShotgunGuy",
"LostSoul",
"Archvile",
"Fatso",
"HellKnight",
"Cyberdemon",
"PainElemental",
"WolfensteinSS",
"StealthArachnotron",
"StealthArchvile",
"StealthCacodemon",
"StealthChaingunGuy",
"StealthDemon",
"StealthDoomImp",
"StealthFatso",
"StealthRevenant",
"ExplosiveBarrel",
"CacodemonBall",
"Rocket",
"BFGBall",
"ArachnotronPlasma",
"Blood",
"BulletPuff",
"Megasphere",
"InvulnerabilitySphere",
"Berserk",
"BlurSphere",
"RadSuit",
"Allmap",
"Infrared",
"ClipBox",
"RocketAmmo",
"RocketBox",
"CellPack",
"ShellBox",
"Backpack",
"Gibs",
"ColonGibs",
"SmallBloodPool",
"BurningBarrel",
"BrainStem",
"ScriptedMarine",
"HealthBonus",
"FatShot",
"BaronBall"

};

function int GetActorClass (int tid)
{
	for (int i=0; i<105; i++)
		if (ThingCountName (Class[i], tid))
			return Class[i];
	
	return 0;
}

For custom DECORATE actors, you only need to increase the array size to account for your extra actors and add them to the array.