(Deathlike2)
This thread is an appendix to the magic algo, since the majority of that has an impact depending on resistances...

Onto the algo...

HP Power (HP attack based on caster) = Caster's Current HP
HP Power (HP attack based on target) = Target's Max HP

Base HP Spell Power = Whatever is normally listed in the spell power slot
Base HP Absorb Spell Power = Whatever is normally listed next to the spell power data (**default: 100/Base HP Spell Power)
****Base HP Spell Hit Rate = Whatever is normally listed in the hit rate slot

**Note: Not sure if that always have to be defined like that, but it is there anyways...
****Note: Make sure to subtract 128 if it uses the boss bit

HP Spell Power Elemental Modifier (HP attack based on target):
Target is Weak to Element, HP Spell Power = 2
Target is Resistant to Element, HP Spell Power = 10
**Target is Immune to Element, HP Spell Power = 10
**Target Absorbs Element, HP Spell Power = Base HP Spell Power * -1
Unapplicable, HP Spell Power = Base HP Spell Power

HP Spell Power Elemental Modifier (HP attack based on caster):
Target is Weak to Element, HP Spell Power = Base HP Spell Power * 2
Target is Resistant to Element, HP Spell Power = Base HP Spell Power / 2
**Target is Immune to Element, HP Spell Power = Caster's Current HP
**Target Absorbs Element, HP Spell Power = Base HP Spell Power * -1
Unapplicable, HP Spell Power = Base HP Spell Power

**Note: In the SNES version, Immunity has precedence over Absorb. In the GBA version, Absorb has precedence over Immunity.

HP Based Damage Bonus:
HP attack based on target, HP Damage Bonus = 0
HP attack based on caster, HP Damage Bonus = (Caster's Current HP/ HP Spell Power * rand (100, 150) / 100) % 256

Basic Formula - Includes Weakness, Resistance, and Immunity (SNES and GBA versions):

//skip loop if using the GBA version...

while (Spell Multiplier > 0)
{
 if(Target's Magic Defense Multiplier == 0)
 {
  Success = true
  break;
 }

 while(Target's Magic Defense Multiplier > 0)
 {
  Target's Magic Defense Multiplier--;
  if (rand(0, 99) > HP Spell Hit Rate) || (rand(0, 99) < Target's Magic Evade))
  {
    break;
  }
 }
 Spell Multiplier--;
}

if (Success) //only applies to SNES version
{
 Damage = Base HP Power / HP Spell Power + HP Damage Bonus
}


Personal Message (Offline)
	
	
HP Damage Algo
« Topic Start: March 20, 2008, 12:43:37 pm »
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Refer to this thread for the start of my idea, but it wasn't fully fleshed out - http://slickproductions.org/forum/index.php?topic=390.0

This thread is an appendix to the magic algo, since the majority of that has an impact depending on resistances...

Onto the algo...

HP Power (HP attack based on caster) = Caster's Current HP
HP Power (HP attack based on target) = Target's Max HP

Base HP Spell Power = Whatever is normally listed in the spell power slot
Base HP Absorb Spell Power = Whatever is normally listed next to the spell power data (**default: 100/Base HP Spell Power)
****Base HP Spell Hit Rate = Whatever is normally listed in the hit rate slot

**Note: Not sure if that always have to be defined like that, but it is there anyways...
****Note: Make sure to subtract 128 if it uses the boss bit

HP Spell Power Elemental Modifier (HP attack based on target):
Target is Weak to Element, HP Spell Power = 2
Target is Resistant to Element, HP Spell Power = 10
**Target is Immune to Element, HP Spell Power = 10
**Target Absorbs Element, HP Spell Power = Base HP Spell Power * -1
Unapplicable, HP Spell Power = Base HP Spell Power

HP Spell Power Elemental Modifier (HP attack based on caster):
Target is Weak to Element, HP Spell Power = Base HP Spell Power * 2
Target is Resistant to Element, HP Spell Power = Base HP Spell Power / 2
**Target is Immune to Element, HP Spell Power = Caster's Current HP
**Target Absorbs Element, HP Spell Power = Base HP Spell Power * -1
Unapplicable, HP Spell Power = Base HP Spell Power

**Note: In the SNES version, Immunity has precedence over Absorb. In the GBA version, Absorb has precedence over Immunity.

HP Based Damage Bonus:
HP attack based on target, HP Damage Bonus = 0
HP attack based on caster, HP Damage Bonus = (Caster's Current HP/ HP Spell Power * rand (100, 150) / 100) % 256

Basic Formula - Includes Weakness, Resistance, and Immunity (SNES and GBA versions):

Code:

//skip loop if using the GBA version...

while (Spell Multiplier > 0)
{
 if(Target's Magic Defense Multiplier == 0)
 {
  Success = true
  break;
 }

 while(Target's Magic Defense Multiplier > 0)
 {
  Target's Magic Defense Multiplier--;
  if (rand(0, 99) > HP Spell Hit Rate) || (rand(0, 99) < Target's Magic Evade))
  {
    break;
  }
 }
 Spell Multiplier--;
}

if (Success) //only applies to SNES version
{
 Damage = Base HP Power / HP Spell Power + HP Damage Bonus
}


Absorb Formula (SNES version):
Use Base HP Absorb Spell Power and plug that into the general magic algo as the Base Spell Power

Absorb Formula (GBA version):
If the spell is single targeted...
HP Absorb Spell Power = Base HP Absorb Spell Power * 3/2
Target's Magic Defense = 0
Target's Magic Evade = 0
Plug in HP Absorb Spell Power into the general magic algo as the Base Spell Power

Note: This isn't really known quite yet...

If the spell is multitargeted...
Damage = Base HP Power / HP Spell Power + HP Damage Bonus