Lua Help: Spawning different debris with A_RingExplode

[Joosp]

If you've seen Jasper in Great Divide, he uses an attack that uses A_RingExplode to cause damage. I want to simply duplicate the effects of A_RingExplode except using a different object to spawn instead of MT_NIGHTSSPARKLE (the object is essentially the same, just different sprites). I did look at the page for the action on the Wiki, but I definitely can't read C well enough to understand what is going on. Is there a way to simply change the debris of the action when certain conditions are met, or do I have to recreate the action entirely with P_SpawnParaloop?

 

[wolfs]

A_OldRingExplode allows you to select your own objects, but it's probably not the effect you were looking for.

 

[Joosp]

Yeah, A_OldRingExplode ends up putting the objects in a different formation than the regular A_RingExplode and kills off said objects in a very short time. I could use it as a ~last resort~ kind of thing but even then I'd probably stick to A_RingExplode.

 

[Monster Iestyn]

Yeah, you're going to have to recreate the action entirely with Lua, with a different object in place of MT_NIGHTSPARKLE.

Just a note while we're here, P_SpawnParaloop only spawns one loop of objects directed away at a particular vertical angle around the coordinates; it has to be used multiple times in one go for a more spherical arrangement, as done in A_RingExplode itself (the action in question does that 16 times there for 16 multiples of ANGLE_22h, as 22.5° * 16 = 360°).

To recreate THAT particular bit at least in Lua you can do this:

for d = 0,15
	P_SpawnParaloop(actor.x, actor.y, actor.z+actor.height,
		FixedMul(actor.info.painchance, actor.scale), 16,
		MT_TYPEYOUWANT, d*ANGLE_22h, S_NULL, true)
end

Line breaks included to stop the line being too long. Also, Lua swaps around the angle and state for the function, if you're confused by that at all.

 

[Joosp]

Fission Mailed.

I ended up changing actor to player.mo, since that was the only object I had as a reference (and the fact that I'm not sure what actor represents here). I just used MT_NIGHTSPARKLE in this gif as I haven't finished up the alternate sparkle.

 

[Monster Iestyn]

...huh, that's odd then. Should probably try and recreate that thing myself when I can.

 

[Monster Iestyn]

AHA, should have realised before that using the player's painchance thing wouldn't do any good. It works fine when I replaced player.mo.info.painchance with 192*FRACUNIT.

Link to my own little test script which I made just now.

 

[Joosp]

Works perfectly now. I've already implemented the "exploding" part of the ability with P_RadiusAttack so it looks like smooth sailing from here. Thanks again!