Imp fireball damage type? (Solved)

[R4L]

Howdy!

The ZDoom wiki entry for DoomImpBall doesn't list if the actor has a specific damage type, but it does say the actor is an Explosive type. Am I to assume that there is no damage type associated with imp fireballs? Only reason I ask is to troubleshoot a problematic issue in Metroid Dreadnought (Some imp fireballs, maybe 1/10 times, does not damage the player if they have the Varia Suit.)

For the Varia Suit, it just grants a powerup that I've made:

Code: Select all

ACTOR IHateHeat : PowerProtection {

    Inventory.Amount 0
	+INVENTORY.AUTOACTIVATE
	+INVENTORY.ALWAYSPICKUP
	PowerUp.Duration 0x7FFFFFFF
	DamageFactor "Lava", 0.5
	DamageFactor "Normal", 0.5
	DamageFactor "Fire", 0
}

I thought maybe fireballs would have the "Fire" damage type but if that was the case, they wouldn't damage me at all. Any ideas?

[InsanityBringer]

Damagetypes are not used by any default Doom object types, they all do Normal damage. With just this protection powerup enabled, even a minimum damage imp fireball should still do 1 damage, so is there any further damage reduction down the line (armor or something?)

[R4L]

Nope lol. Even with an armor pickup, it seems to be random when a fireball does no damage.

[wildweasel]

Nope lol. Even with an armor pickup, it seems to be random when a fireball does no damage.

Depending on damage factors on your player class and/or armor type, it's possible that the damage value is getting rounded down to nothing.

[R4L]

Nope lol. Even with an armor pickup, it seems to be random when a fireball does no damage.

Depending on damage factors on your player class and/or armor type, it's possible that the damage value is getting rounded down to nothing.

Here's the damage types defined in the player class:

Code: Select all

    DamageFactor "NoDamage", 0.0
    DamageFactor "Drowning", 0.0
    DamageFactor "Slime", 1.0
    DamageFactor "Lava", 1.0
    DamageFactor "Fire", 1.0
    DamageFactor "Normal", 0.75

[R4L]

I figured it out...

Not sure why, but increasing some damage values fixed it.

[InsanityBringer]

in that case, it definitely seems like all the stacked damage reductions were causing minimum damage imp fireballs (which do 3 damage, rolled 1/8 of the time) to round to 0.

If the damage is halved, this means the 3 damage fireball now only does 1 damage, since GZD always rounds "fractional" damage down. The further reduction of 25% of all Normal damage reduces it to .75 damage, which ends up rounding to 0 since a minimum damage isn't enforced.

(side note: normal Doom armor works differently, causing fractional damage to round up (and the fractional damage taken by the armor to round down), so you'll always take 1 point of damage with any level of basic armor, unless it's 100% reduction)

[R4L]

in that case, it definitely seems like all the stacked damage reductions were causing minimum damage imp fireballs (which do 3 damage, rolled 1/8 of the time) to round to 0.

If the damage is halved, this means the 3 damage fireball now only does 1 damage, since GZD always rounds "fractional" damage down. The further reduction of 25% of all Normal damage reduces it to .75 damage, which ends up rounding to 0 since a minimum damage isn't enforced.

(side note: normal Doom armor works differently, causing fractional damage to round up (and the fractional damage taken by the armor to round down), so you'll always take 1 point of damage with any level of basic armor, unless it's 100% reduction)

Ah, I get it now. I didn't realize GZD rounded down fractional damage like that. Good to know!