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Author Topic: HP Damage Algo  (Read 6316 times)

Deathlike2

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Re: HP Damage Algo
« Reply #15 on: September 29, 2008, 10:32:54 AM »
The HP based absorb formula is being applied perfectly to FF2 SNES via the Firebomb vs the Red Dragon. The Red Dragon has 0 magic defense, so the numbers are between 64 and 96.
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Dragonsbrethren

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Re: HP Damage Algo
« Reply #16 on: September 29, 2008, 11:07:23 AM »
I'm going to have to do a few more tests but it seems to be consistent with what I'm seeing in Easy Type as well.
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Deathlike2

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Re: HP Damage Algo
« Reply #17 on: September 29, 2008, 11:19:21 AM »
I don't think the battle engine has changed between the versions (other than the Stop and Sleep/Paralysis bug).

I'm more interested in the GBA tests to see if I'm on target.
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Deathlike2

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Re: HP Damage Algo
« Reply #18 on: September 29, 2008, 12:16:47 PM »
Looks like I was wrong a bit on the GBA's HP Absorb formula..

It's actually much simpler than that...

Damage = currentHP * maxHP modifier / 25

and then...

Damage = Damage + ((Damage * rand(100,150)/100) % 256) - Target's Magic Defense

To resummarize the SNES's HP Absorb forumla..

Damage = (maxHP modifier * 4 * rand(100,150)/100 - Target's Magic Defense) * Spell Multiplier

In looking at this, it's really pluging it into the regular spell damage formula...

 :edit:

The GBA absorb formula looks very much like current HP damage formula (well, particularly the Blue Dragon's Blizzard/Ice Storm attack), except that ignores Magic Defense.
« Last Edit: September 29, 2008, 01:16:04 PM by Deathlike2 »
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Deathlike2

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Re: HP Damage Algo
« Reply #19 on: September 29, 2008, 01:04:45 PM »
In testing the SNES Blue Dragon's Blizzard attack...

It seems like the resistance/immunity modifier is applied late..

Damage = curHP / curHP modifier

Damage = Damage + ((Damage * rand(100,150)/100) % 256)

Then, based on the elemental resistance...

Resistance:
Damage = Damage * 1/2

Immunity:
Damage = Damage * 0

Absorb seems to follow a different formula...
« Last Edit: September 29, 2008, 02:27:44 PM by Deathlike2 »
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Deathlike2

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Re: HP Damage Algo
« Reply #20 on: September 29, 2008, 01:25:27 PM »
Wow, the Absorb formula for SNES Blue Dragon's Blizzard is really really familiar..

Damage = (curHP modifier * 4 * rand(100,150)/100 - Target's Magic Defense)

It's really more like this..

Damage = (curHP modifier * 4 * rand(100,150)/100 - Target's Magic Defense) * Spell Multiplier

Since the Blue Dragon has a 1x spell multiplier...

Ok, that seems to be resolved...
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