"Proc chance" weapons?

[Ixnatifual]

Is it possible to make a weapon that has a chance on each attack that it'll cast a spell? I'd like to change the Flame Blade from being basically a "wand of fireballs" into a regular sword that has a chance of casting Fireburst when attacking.

I tried putting a function returning a string as the item's onAttack value, but that doesn't fly.

[mahric]

The dismantler is a sword that is available in the game. It seems to have a random chance to cast a shock spell.
However, if you look at the definition of the dismantler (in the items.lua), there is nothing that indicates that ability.
Even worse: if you use that script in your mod you only have a basic sword and you don't get the random proc chance.

To get something with the effect that you want, follow these steps:

1) create your own weapon by copying and pasting the following script into your items.lua. Adjust the parameters where needed.

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defineObject{
	name = "fireburst_blade",
	class = "Item",
	uiName = "Fireburst Blade",
	model = "assets/models/items/long_sword.fbx",
	description = "A magical fire flickers on the glowing hot steel of the blade.",
	skill = "swords",
	gfxIndex = 216,
	attackPower = 14,
	damageType = "fire",
	accuracy = 0,
	coolDownTime = 3,
	attackMethod = "meleeAttack",
	attackSwipe = "vertical",
	attackSound = "swipe",
	impactSound = "impact_blade",
	weight = 4.0,
}

2) Add the following code to your init.lua or, if you already have a "party" defined, only copy and paste the "onAttack" function.

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cloneObject{
	name = "party",
	baseObject = "party",

	onAttack = function(champion, weapon)
		-- check if it is the fireburst_blade
		if weapon.name == "fireburst_blade" then
			-- check if proc goes off (40 pct chance in example below)
			if math.random(1, 100) <= 40 then
				-- do actual spellcasting here
            local dx, dy = getForward(party.facing)
            local s = spawn("spawner", party.level, party.x+dx, party.y+dy, party.facing)
            s:setSpawnedEntity("fireburst")
            s:activate()
            s:destroy()
			end
		end
	end,
}

The disadvantages of this quick code are:
- A proc might go off, even if the player misses the monster
- A member from the back of the party can use this to proc a weapon even if they can't reach the monster (this can be solved with more scripting)

Hope this works as you intended!

[Isaac]

Several weapons that can be made by the Smith in the ORRR2 do this... Dagger of Fireburst, for instance.

The Deathkiss sword in ORRR2 does this also; but it's not limited to just one spell.