Possible to Assign DamageType Without Replacing Actor?

[MrJohnny]

The title says all. I'm looking to assign a custom damagetype to Doom's BFGBall without actually replacing it. Is this possible, somehow?

[krokots]

Well in ZScript you could do following, but this means you need to make an additional Class from which all your mod's actors would need to inherit.
In this class you would override "DamageMobj" and inside, you would just check if the inflictor class name is "BFGBall". If it is, you could just change damage type (it's called 'mod' in this function) to some other type.

[MrJohnny]

Sorry to be a bother, but I'm sort of new to the whole zscript scene. If it's no trouble, would you mind providing a rough example?

[krokots]

So this would only apply to actors that inherit from a parent class, say, MyActor

Code: Select all

Class MyActor : Actor
{
	override int DamageMobj(Actor inflictor, Actor source, int damage, Name mod, int flags = 0, double angle = 0)
	{
		if(inflictor.GetClassName() == "BFGBall")
		{
			mod = 'ChangedDamageType';
		}
		return Super.DamageMobj(inflictor, source, damage, mod, flags, angle);
	}
}

With this, you need all your actors that you want that changed damage type to apply, to inherit from MyActor, not Actor, so:

Code: Select all

Class MyZombieman : MyActor replaces Zombieman
{
	//Copy code from Zombieman
}

Unfortunately this as you can see is not perfect, because you need to copy all the classes you want to use just to inherit from MyActor. The positive is that you will have then great control over this actors, because of cool virtual functions, like DamageMobj, or Die.

[MrJohnny]

Wow, thanks a billion! This saved me a lot of headache!

[MrJohnny]

Okay, so I've run into a problem. Apparently, whenever an actor that inherits from the class is crushed, GZDoom crashes and throws the following error: "vm execution aborted: tried to read from address zero. Called from AllowDamagetypes.DamageMobj at NOUV.pk3: zscript, line 7"

Code: Select all

version "2.5"

Class AllowDamagetypes : ACTOR
{
	override int DamageMobj(Actor inflictor, Actor source, int damage, Name mod, int flags = 0, double angle = 0)
	{
		if(inflictor.GetClassName() == "BFGBall") 
		{
			mod = 'BFG';
		}		
      return Super.DamageMobj(inflictor, source, damage, mod, flags, angle);
	}
}

[Arctangent]

You're not checking if inflictor is null, so when the actor dies to the world ( and thus there's no inflictor ) it tries to call GetClassName() from a non-existent object.

[MrJohnny]

That makes sense. Thanks, works like a charm.