Activating script with an inventory item

[cocka]

Hello!

Is there a way to activate a script when I press enter on an inventory item?

Thanks for your reply.

[ChronoSeth]

First thing that comes to mind is calling [wiki]ACS_Execute[/wiki] or similar from a [wiki]CustomInventory[/wiki] item (it's usually easy to emulate the effects of a "normal" inventory item, so don't worry about that).

[cocka]

Thanks, but I'm not really familiar with decorate.

[Enjay]

I don't know how good an example it is but here's what I did for the portable night vision goggles in my Burghead mod:

Code: Select all

ACTOR NJInfraRed2 : CustomInventory 22067
{
   Tag "Night Vision Goggles"
   Inventory.PickupMessage "Picked night vision goggles."
   inventory.maxamount 1
   inventory.icon ARTIGOGG
   inventory.usesound "misc/infrared"
   Mass 5
   +INVBAR
   +Floorclip
   Scale 0.5
   States
   {
     Spawn:
     PNVG AABB 4 Bright
     LOOP
     Use:
     TNT1 A 1 ACS_Execute (500, 0, 0, 0, 0) 
     Stop
   }
  }

[cocka]

I don't want to create new ones, just reuse the inventory items from Hexen. Perhaps it can be solved by using inheritance. Or I don't know.

And what if you just want to use this activation in one place in a map? So there is a place on the map where if you use the inventory item, it will activate a script, but if you are elsewhere, it won't.

[BloodyAcid]

Tag the sectors and use the script to run a check on whether or not you're there. I think that works.

[cocka]

I think it's easier to use thing executed specials such as: actor enters/leaves sector. OK, but if I use the CustomInventory decorate, how will I be able to remove the script execution from the inventory item or prevent the script being executed in other situations?

[Blue Shadow]

Here is a little test demonstrating how to achieve what you're after.

[cocka]

Thank you very much. I understand the acs script quite well, but the decorate is a bit obscure for me. Why should be placed the Fail at the end of Use state?

If you learn the decorate, is it absolutely necessary to learn the parent actors' properties, states, flags and functions? I mean this one:

http://zdoom.org/wiki/Classes:Inventory

[Nightfall]

If you learn the decorate, is it absolutely necessary to learn the parent actors' properties, states, flags and functions?

Learning is overrated. Just open up the reference when you need something.

[cocka]

OK, new problems arise with this decorate stuff. There would be two puzzle items on the map which would activate the script. So I think I cannot use Use state because zdoom gives me error.

I would like something similar to UsePuzzleItem, but with more than one item. For example: I use this special on a bishop. (Hexen) If I give him the blue gem by pressing enter on the blue gem in the inventory, he'll give me another inventory item. If I give him the green gem, he'll give me another item.

UsePuzzleItem won't let me use more than one puzzle item on the same bishop.

[BloodyAcid]

Make the bishop an object that can be activated. Then make him run a script to check for the appropriate gem colour and give the right item.

[cocka]

Make the bishop an object that can be activated

What do you mean by that? Do I have to use the Active-Inactive actor states or just give a script to the bishop? Or did you think of +USESPECIAL flag?

[Blue Shadow]

Why should be placed the Fail at the end of Use state?

The Fail keyword there will prevent the item from being removed from the player's inventory whenever the player uses it, since the script itself controls whether the item is removed or not upon execution.

[cocka]

Oh, I see now.

The only question is how you can apply your CustomInventory item if it is about a puzzle item?

Here is my decorate script for the modified gem:

Code: Select all

ACTOR kekgem : PuzzleItem 12000
{
  Game Hexen
  SpawnID 81
  PuzzleItem.Number 5
  Inventory.Icon ARTIGEMB
  Inventory.PickupMessage "$TXT_ARTIPUZZGEMBLUE1" // "SAPPHIRE PLANET"
  States
  {
  Spawn:
    AGMB A -1
    Stop
  Use:
	TNT1 A 0 ACS_Execute(5, 0, 1, 0, 0)
	Fail
  }
}

If I press enter on the item the program says "you cannot use this here" and completely ignores the Use state. If I write CustomInventory 12000 instead of PuzzleItem 12000 then program says:

Script error, "Forest2.wad:DECORATE" line 10:
Unexpected '5' in definition of 'kekgem'

This refers to the line: PuzzleItem.Number 5. So I don't know what's wrong with it. Hmm, but if I write this: +INVENTORY.INVBAR instead of PuzzleItem.Number 5 then it will work.