Preventing Effect Stacking in Potions

[Macready]

Hello -

 

If you have a spell whose effects shouldn't stack with itself (e.g., greater malison shouldn't lower saves more than once), it is my understanding that you prevent the stacking by adding a "protection from spell" effect to the spell (e.g., if greater malison is spwi4xx, you add a protection from spell spwi4xx effect so that any target affected by malison is protected from being affected again).

 

Is there a way to do the same thing with potions? One potion which has an increment effect is the potion of fire resistance: it adds 50% to fire resistance. Is there any way of preventing the stacking of effects from multiple fire resistance potions without inhibiting the player's ability to add resistance from other sources (say, a ring of fire resistance)? Or is it generally accepted that any potions containing increment/decrement effects are supposed to have their effects be stackable?

[igi]

From reading your post, the obvious way would be to patch the item to apply its affects via spell (rather than directly). Then you can use the Protection From Spell opcode.

There may be an even simpler way.

[CamDawg]

I can't think of anything offhand--you could do EFFs, but it's the same basic idea as the spell, only more files. Can't Use Item might work but I doubt it. I believe it just prevents you from equipping items and that may not prevent you from using the abilities of an item.

[Macready]

Hello -

 

Thanks for the answers -- they are very much appreciated.

[Avenger]

I think igi's way is the simplest. And it is a really good trick