I was messing around with TheLys' Resources Enhanced. I really like mining by attacking the ore with a miner's pick, but it would be nice if the pick's health decreased as you mined. Is there a way to do it? All I could see from the MWSE documentation is that there's a GetWeaponCondition function, but no ModWeaponCondition function.

I think you would need a NPC/creature as container to hit. A setparalysis 1 / skipanim invisible race NPC dressed with a rock mesh, or a minimal animation rock creature similar to some training dummy creature could do.

Something I don't remember and have no way to check without the game installed:

In the Construction Set, is it possible to create a weaponn with partial health? I.e., have it start with 75 out of 100 health, for example?

If so, you could create a set of miner's picks, each with a different amount of health, and swap the current weapon with a more damaged weapon periodically.

Yes.
But only a reference : An object placed in the world, not in an inventory or container.
Example : The silver staff sold by Arrile

Inusable feature for scripting purpose...

A method I have used to track wear on an item (lock picks used in an unconventional way) is to check Random100 for a possible chance of breaking (for me 20 uses per pick therefore 5% chance of breaking). Then I removed the item with a message explaining it was broken. I like the realistic uncertainty of when the item will be worn out. If you prefer an absolute number of uses, then you could have a counter keep track of the number of uses and then 'break it'. The challenge would be in either case to know when the player is using the item. Perhaps you could check for the sound of the pick striking the rock when it is equipped by the player.

Thanks everyone! I tried out both of these suggestions.

The original script does indeed check for the sound of the weapon swing, so that part's been taken care of for me. Using the random counter, this method works well. The only thing I think it's missing is that you can't repair the pick after mining a bit.

This seems like it would work really well. I modified the script to check for OnPCHitMe rather than the sound of the weapon swing, but for some reason after a random number of hits hits it now skips over to the end of the script where the rock is mined out and disappears (displays messagebox "There's nothing more to get from this rock" and then disables). The NPC will no longer provide random gems but it doesn't disappear after the first hit so I'm confused as to what happened. If you'd like to look at the scripts, here's the original one that worked for the rock as a container:

Nevermind, turns out I forgot to add any diamonds to the NPC's inventory . Now I've just got to adjust the models so they're not floating over the original rocks. This is a long shot, but is there a way to stop the bleeding texture from appearing?

You'd need to define a new blood texture in the [Blood] section of the .ini and assign it to the NPC/creature. You would need a new blood mesh and texture, but it just needs to be invisible, so maybe an editor marker would work.

Now, looking at the mod, it looks like the pick's health is supposed to decrease with a disintegrate weapon effect, but this effect doesn't seem to work on self.

Oh wow, why didn't I think of that? It seems like the disintegrate weapon effect is a bit buggy though (I think I had heard that was the case). It actually works as long as the weapon's health isn't full as far as I can tell. Heh, I'm not that great at Morrowind scripting yet, so it took me a lot of attempts just now before I could successfully remove the spell with a auxiliary script and stop that script from endlessly recurring.