Difference between revisions of "FF7/DamageFormula"

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(→‎Damage Formula's description)
m (→‎0: Physical Accuracy Check: There is an enemy check on the Dex bonus that I didn't notice before. Physical Chance is unaffected.)
 
(35 intermediate revisions by 5 users not shown)
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−
== Damage Formula's description ==
+
==Accuracy Function considerations==
 +
Each of the upper nybble of the damage calculation determines what checks are done to accuracy of the action and whether or not it will connect, be critical or miss. Here are the functions in order processed based on the upper nybble:
  
 +
{| border="1" cellspacing="1" cellpadding="3" style="border: 1px solid black; border-collapse: collapse;"
 +
! style="background:rgb(204,204,204)" | Upper Nybble
 +
! style="background:rgb(204,204,204)" | Functions
 +
|-
 +
| 0
 +
| None (always hits)
 +
|-
 +
| 1
 +
| [[FF7/DamageFormula#0:_Physical_Accuracy_Check|Physical Accuracy]], [[FF7/DamageFormula#2:_Critical_Hit_Check|Critical Check]]
 +
|-
 +
| 2
 +
| [[FF7/DamageFormula#1:_Magical_Accuracy_Check|Magical Accuracy]]
 +
|-
 +
| 3
 +
| Dummy [3] (always hits)
 +
|-
 +
| 4
 +
| Dummy [4] (always hits)
 +
|-
 +
| 5
 +
| Dummy [5] (always hits)
 +
|-
 +
| 6
 +
| [[FF7/DamageFormula#0:_Physical_Accuracy_Check|Physical Accuracy]], [[FF7/DamageFormula#2:_Critical_Hit_Check|Critical Check]]
 +
|-
 +
| 7
 +
| [[FF7/DamageFormula#1:_Magical_Accuracy_Check|Magical Accuracy]]
 +
|-
 +
| 8
 +
| [[FF7/DamageFormula#7:_Level-based_Accuracy|Level-based Accuracy]]
 +
|-
 +
| 9
 +
| [[FF7/DamageFormula#6:_Manipulate_Accuracy_.28intended_solely_for_playable_characters.29|Manipulate]]
 +
|-
 +
| A
 +
| [[FF7/DamageFormula#0:_Physical_Accuracy_Check|Physical Accuracy]], [[FF7/DamageFormula#2:_Critical_Hit_Check|Critical Check]]
 +
|-
 +
| B
 +
| [[FF7/DamageFormula#0:_Physical_Accuracy_Check|Physical Accuracy]]
 +
|-
 +
| C
 +
| None (always hits)
 +
|-
 +
| D
 +
| None (always hits)
 +
|-
 +
| E
 +
| None (always hits)
 +
|-
 +
| F
 +
| None (always hits)
 +
|}
  
−
0xA4:
+
=Damage Calculations=
 +
These are the damage functions according to an unmodded FF7-ENG 1.02 (1998)
 +
==Standard Formulae==
 +
===X0:===
 +
''0x5DE5C0''
 +
<pre>Sets Target's 02h flag to 1. (Unknown effect)</pre>
  
−
Prepare Function 0x0
+
===X1:===
 +
''0x5DE5DF''
 +
<pre>If Attack Property "Always Critical" is Set
 +
Set Critical Damage Flag
 +
End If
  
−
Prepare Function 0x2
+
x = ( Actor's Level * Actor's (M)Attack ) / 32
 +
y = ( Actor's Level + Actor's (M)Attack ) / 32
 +
z = Actor's (M)Attack + ( x * y )
 +
z = z * ( 512 - target's defense ) * Attack's Power
 +
Damage = z >> 13
 +
//This is a bit-shift left by 13 which is mathematically equivalent to dividing by 8192, but it's important to note that it doesn't actually divide as this is the source of the damage overflow glitch
  
−
power_modifier = 1 + (((current_hp * 3) / max_hp) * power_modifier);
+
If Critical Damage Flag is set
 +
Damage = Damage * 2
 +
End If
  
−
Damage Function 0x1
+
If Actor's Statuses include Berserk
 +
Damage = Damage * 3 / 2
 +
End If
  
 +
Long_Range = 0
 +
If Target is in Back Row
 +
Set Long_Range = 1
 +
End If
  
 +
If Attack is Short Range OR Command is Enemy Attack
 +
If Actor is in Back Row
 +
Long_Range = 1
 +
End If
 +
Else
 +
Long_Range = 0
 +
End If
  
−
0xA5:
+
If Long_Range != 0
 +
Damage = Damage / 2
 +
End If
  
−
Prepare Function 0x0
+
If Target is Defending
 +
Damage = Damage / 2
 +
End If
  
−
Prepare Function 0x2
+
If Target's Back is exposed
 +
Damage = Damage * ( Target's Back Attack Modifier / 8 )
 +
End If
  
−
power_modifier = 1 + (((current_mp * 3) / max_mp) * power_modifier);
+
If Actor's Statuses includes Frog
 +
Damage = Damage / 4
 +
End If
  
−
Damage Function 0x1
+
Damage = Sadness( Damage )
 +
Damage = Split( Damage, 0 )
 +
Damage = Barrier( Damage )
 +
 
 +
If Actor's Statuses include Mini
 +
Damage = 0
 +
End If
 +
Damage = Variance( Damage )</pre>
  
 +
===X2:===
 +
''0x5DE9B8''
 +
<pre>
 +
multiNoSplit = ( ( ( Attack's Target Flags AND Ch ) - 4 ) == 0 ? 1 : 0 )
 +
Base = (Actor's Attack + Actor's Level) * 6
 +
Damage = (512 - Target's Defense) * Base * Attack's Power / 8192
 +
Damage = Sadness( Damage )
 +
Damage = SplitDamage( Damage, multiNoSplit )
 +
Damage = Barrier( Damage )
 +
Damage = Variance( Damage )
 +
</pre>
  
 +
===X3:===
 +
''0x5DEA6D''
 +
<pre>
 +
If Attack Properties Damage MP is clear
 +
Damage = Target's HP
 +
Else
 +
Damage = Target's MP
 +
End If
  
−
0xA7:
+
Damage = Damage * Attack's Power / 32
  
−
Prepare Function 0x0
+
If ActionData[AC] != 0 (?)
 +
Damage = Damage / 2
 +
End If</pre>
  
−
Prepare Function 0x2
+
===X4:===
 +
''0x5DEAF7''
 +
<pre>If Attack Properties Damage MP is clear
 +
Damage = Target's MHP
 +
Else
 +
Damage = Target's MMP
 +
End If
  
−
power_modifier = 10 + (((number_of_kills / 128) * power_modifier) / 16)
+
Damage = Damage * Attack's Power / 32
  
−
Damage Function 0x1
+
If ActionData[AC] != 0 (?)
 +
Damage = Damage / 2
 +
End If
 +
</pre>
 +
 
 +
===X5:===
 +
''0x5DEB81''
 +
<pre>
 +
Damage = (Actor's (M)Attack + Actor's Level) * 6 + (Attack's Power * 22)
 +
Damage = SplitDamage( Damage )
 +
Damage = Barrier( Damage )
 +
Damage = Variance( Damage )</pre>
 +
 
 +
===X6:===
 +
''0x5DEBE5''
 +
<pre>Damage = Attack's Power * 20</pre>
 +
 
 +
===X7:===
 +
''0x5DEC0A''
 +
<pre>
 +
Damage = ( ( 512 - Target's Def ) * Attack's Power / 32 )
 +
Damage = Variance( Damage )
 +
</pre>
 +
 
 +
===X8:===
 +
''0x5DEC52''
 +
<pre>
 +
If ActionData[0x230] AND 40h
 +
ActionData[0x230] = 1
 +
Else
 +
ActionData[0x230] = 80h
 +
End If
 +
//presumably this checks if the target heals from restore element and will either recover or kill based on the result</pre>
 +
 
 +
===X9:===
 +
''0x5DEC8A''
 +
<pre>
 +
Actor's Attack = Actor's Strength * 2
 +
Use Damage X1 with adjusted stat
 +
</pre>
 +
 
 +
===XA:===
 +
''0x5DECAA''
 +
<pre>Damage = ( Attack's Power + Number of Targets - 1 ) / Number of Targets</pre>
 +
 
 +
==Additional Checks==
 +
===Sadness( Damage )===
 +
''0x5DE958''
 +
<pre>
 +
If Target's Status includes Sadness
 +
Damage = Damage - (Damage * 3 / 10)
 +
End If
 +
Return Damage</pre>
 +
 
 +
===SplitDamage( Damage, multiNoSplit )===
 +
''0x5DE8F4''
 +
<pre>
 +
If multiNoSplit == 0
 +
If No. of Attack's Targets >= 2
 +
Set Attack's split damage Target Flag
 +
Else
 +
Set multiNoSplit == 1
 +
End If
 +
End If
 +
 
 +
If ActionData[0xAC] == 0
 +
Damage = Damage / 2
 +
Else
 +
If multiNoSplit == 0
 +
Damage = Damage * 3 / 2
 +
End If
 +
End If
 +
Return Damage
 +
</pre>
 +
 
 +
===Barrier( Damage )===
 +
''0x5DE82C''
 +
<pre>
 +
If Attack Property "Physical" is 0
 +
If Target's Statuses include MBarrier
 +
Set ActionData "MBarrier Active" flag
 +
End If
 +
Else
 +
If Target's Statuses include Barrier
 +
Set ActionData "Barrier Active" flag
 +
End If
 +
End If
 +
 
 +
If ActionData "MBarrier Active" or "Barrier Active" flags are set
 +
Damage = Damage / 2
 +
End If
 +
 
 +
If attack is Magic and EnabledMagic[7] == 0 (?)
 +
Damage = Damage + ( Damage * ( EnabledMagic[7] * (10 / 32) ) / 100 )
 +
End If
 +
Return Damage
 +
</pre>
 +
 
 +
===Variance( Damage ):===
 +
''0x5DE988''
 +
<pre>
 +
Damage = Damage ([0..255] + 3841) >> 12  //from RNGLUT in KERNEL.BIN
 +
//Again, we have another chance for overflow.
 +
 
 +
If Damage == 0
 +
Damage == 1
 +
End If
 +
Return Damage
 +
</pre>
 +
 
 +
==Secondary Damage Formulae==
 +
===X0:===
 +
''0x5DECFB''
 +
<pre>
 +
Damage = Attacker's HP
 +
</pre>
 +
===X1:===
 +
''5DED1E''
 +
<pre>
 +
Damage = Attacker's MHP - Attacker's HP
 +
</pre>
 +
===X8:===
 +
''0x5DED73''
 +
<pre>
 +
Dice_Count = Attacker's Level / 10
 +
 
 +
If Dice_Count < 2 then
 +
Dice_Count = 2
 +
Elseif Dice_Count > 6
 +
Dice_Count = 6
 +
End If
 +
 
 +
total_dice_roll = 0
 +
For ( d_loop = 0; d_loop < Dice_Count; d_loop++ )
 +
die = [0..5]
 +
all_dice[d_loop] = die
 +
total_dice_roll += die + 1
 +
 
 +
set die visualization based on roll
 +
Loop
 +
 
 +
value_repeat = 0
 +
For ( d_value = 0; d_value < 6; d_value++ )
 +
 
 +
repeat_count = 0
 +
For ( d_loop = 0; d_loop < Dice_Count; d_loop++ )
 +
 
 +
If all_dice[d_loop] = d_value then
 +
repeat_count++
 +
End If
 +
Loop
 +
 
 +
If repeat_count > value_repeat then
 +
value_repeat = repeat_count
 +
End If
 +
 
 +
Loop
 +
 
 +
Damage = value_repeat * 100 * total_dice_roll
 +
</pre>
 +
===X9===
 +
''0x5DEEEF''
 +
<pre>
 +
Damage = Number of Successful Escapes
 +
</pre>
 +
===XA===
 +
''0x5DEF1D''
 +
<pre>
 +
Damage = Target's HP - 1
 +
</pre>
 +
===XB===
 +
''0x5DEF44''
 +
<pre>
 +
Damage = (Game Time Hours * 100) + (Game Time Minutes)
 +
</pre>
 +
===XC===
 +
''0x5DEF88''
 +
<pre>
 +
Damage = Target's Kill Count * 10
 +
//This is intended to be used only on players
 +
//This will cause a memory leak if done on enemies
 +
</pre>
 +
===XD===
 +
''0x5DEFDD''
 +
<pre>
 +
If target is playable character
 +
MateriaCount = 0;
 +
For ( MateriaLoop = 0; MateriaLoop < 8; MateriaLoop++ )
 +
If target has materia in weapon slot [MateriaLoop] then MateriaCount++
 +
If target has materia in armor slot [MateriaLoop] then MateriaCount++
 +
Loop
 +
Damage = MateriaCount * 1111
 +
End If
 +
</pre>
 +
 
 +
=Accuracy Functions=
 +
The point of these is to set the "attack will miss" flag in the current action memory structure.
 +
 
 +
===0: Physical Accuracy Check===
 +
''0x5DDBB0''
 +
<pre>;For the purposes of this code, "Dex" means the adjusted Dexterity of the actor/target if any in-battle dex bonuses have been granted.
 +
;Same holds for the Physical Evade. Physical Hit rate has no in-game bonus opportunities.
 +
 
 +
Check_For_Cover()
 +
 
 +
HitChance = -1;
 +
 
 +
If "Always connect" flag set then HitChance = 255;
 +
 
 +
If target has one of the following statuses (Death, Sleep, Confu, Stop, Petrify, Manipulate, Paralysis) then
 +
Remove Sleep status
 +
Remove Confu status
 +
Remove Manipulate status
 +
HitChance = 255
 +
End If
 +
 
 +
If action is flagged as "always hit" then HitChance = 255;
 +
 
 +
Physical Chance = (Actor's Dex >> 2) + action physical hit rate
 +
If Actor is enemy then
 +
Actor's evade = Actor's Physical evade
 +
else
 +
Actor's evade = (Actor's Dex >> 2) + Actor's Physical evade
 +
End If
 +
If Target is enemy then
 +
Target's evade = Target's Physical evade
 +
Else
 +
Target's evade = (Target's Dex >> 2) + Target's Physical evade
 +
End If
 +
 
 +
If HitChance = -1 Then
 +
HitChance = Physical Chance + Actor's evade - Target's evade
 +
HitChance = FuryAdjust(HitChance)
 +
End If
 +
 
 +
If HitChance = 0 then HitChance = 1
 +
 
 +
Luck Chance = [0..99]
 +
If (Actor's Luck / 4) > Luck Chance Then
 +
HitChance = 255 ;Lucky Hit
 +
Else
 +
If Actor is Player Character targetting an enemy Then
 +
If (Target's Luck / 4) > Luck Chance
 +
HitChance = 0 ;Lucky Dodge
 +
End If
 +
End If
 +
End If
 +
 
 +
Miss Chance = (([0..65535] * 99) / 65535) + 1 ;essentially [1..100]
 +
if HitChance < Miss Chance then
 +
Set Miss flag
 +
End If</pre>
 +
 
 +
====Check_For_Cover====
 +
This is where the game checks if the target is covered under a "cover"ing ally.
 +
It only applies to Player Characters
 +
It might be more complicated than I'm seeing, but that is definitely ONE of its functions
 +
 
 +
====FuryAdjust(HitChance)====
 +
<pre> If HitChance < 255 then
 +
If Actor is in Fury Status
 +
HitChance = HitChance - ((HitChance * 3) / 10)
 +
End If
 +
End If
 +
return HitChance </pre>
 +
 
 +
===1: Magical Accuracy Check===
 +
''0x5DDE5E''
 +
<pre>
 +
acc = Action's Accuracy
 +
tar_save = level / 2; //rounded down
 +
acc_bonus = actor's level - tar_save
 +
rand_0 = [0..99]
 +
rand_1 = [0..99]
 +
if acc < 255 then
 +
  if target does not have instant-death, null, or heal properties to current attack then
 +
      if attack is not (reflectable and target in reflect status) then
 +
        if attack does not inflict statuses or inflicting status include: Death, Sleep, Confu, Stop, Petrify, or Paralysis then
 +
            acc = Fury_Adj( acc );
 +
            if target's M_Evade > rand_0 OR
 +
                acc + acc_bonus < rand_1 then
 +
              Set action miss flag
 +
            end if
 +
        end if
 +
      end if
 +
  end if
 +
end if
 +
</pre>
 +
 
 +
===2: Critical Hit Check===
 +
''0x5DDF8E''
 +
<pre>
 +
If attack does not miss then
 +
  if actor in lucky girl status then
 +
      critical_chance = 255
 +
  else
 +
      critical_chance = ((actor's luck + actor's level) - target's level ) >> 2;
 +
      if actor is playable character then
 +
        critical_chance += weapon's critical bonus //?
 +
      end if
 +
      Critical_random = ( ( [0..65535] * 99 ) / 65535 ) + 1;
 +
      if critical_chance > critical_random then
 +
        attack set to critical
 +
      end if
 +
  end if
 +
end if
 +
</pre>
 +
 
 +
3, 4, and 5 don't exist. Since they don't set miss they will always hit.
 +
 
 +
===6: Manipulate Accuracy (intended solely for playable characters)===
 +
''0x5DE0D0''
 +
<pre>
 +
int ally_loop;
 +
ManipSuccess = 0;
 +
for ( ally_loop = 0; ally_loop < 3; ally_loop++ )
 +
{
 +
  if target is currently under manipulation by an actor then
 +
      break;
 +
  end if
 +
}
 +
if target is not currently being manipulated AND
 +
    target is not a playable character AND
 +
    target is an enemy AND
 +
    actor is not currently manipulating an enemy AND
 +
    target is not under manipulate status AND
 +
    target's timer bar is running AND //like they're not stopped, petrified, etc
 +
    target's attack resistance is "always-hit" then //?
 +
  Manip_Chance = actor's level + 50 - target's level; //no less than 0
 +
  if target count > 1 then
 +
      Manip_Chance = ( Manip_Chance << 2 ) / 5;
 +
  end if
 +
  if actor's [0xAC] == 0 then
 +
      Manip_Chance >> 1;
 +
  end if
 +
  if target's attack resistance is "always-hit" then
 +
      Manip_Chance = 255;
 +
  end if
 +
  if actor's accessory property == 5 //"Increase manip rate" property on Hypnocrown
 +
      if Manip_Chance < 100 then
 +
        Manip_Chance = 100;
 +
      end if
 +
  end if
 +
  If Manip_Chance > [0..99] then
 +
      ManipSuccess = 1;
 +
  end if
 +
end if
 +
If ManipSuccess == 1 then
 +
  Set actor's manipulated enemy to target
 +
  Display String 5Ah {"Manipulated <Enemy>"}
 +
  Clear Actor's 0xE4 value //unknown
 +
else
 +
  Set attack missed
 +
end if
 +
</pre>
 +
This doesn't actually place the target in the manipulate status. That happens elsewhere.
 +
 
 +
===7: Level-based Accuracy===
 +
''0x5DE08A''
 +
<pre>
 +
If Action's Accuracy > 0 then
 +
  If the remainder of ( Target's level / Action accuracy ) is non-zero then
 +
      Set attack missed
 +
  end if
 +
end if
 +
</pre>
 +
So if the accuracy IS 0, then it will always hit. This is to prevent a divide by zero error.

Latest revision as of 16:16, 20 May 2021

Accuracy Function considerations

Each of the upper nybble of the damage calculation determines what checks are done to accuracy of the action and whether or not it will connect, be critical or miss. Here are the functions in order processed based on the upper nybble:

Upper Nybble Functions
0 None (always hits)
1 Physical Accuracy, Critical Check
2 Magical Accuracy
3 Dummy [3] (always hits)
4 Dummy [4] (always hits)
5 Dummy [5] (always hits)
6 Physical Accuracy, Critical Check
7 Magical Accuracy
8 Level-based Accuracy
9 Manipulate
A Physical Accuracy, Critical Check
B Physical Accuracy
C None (always hits)
D None (always hits)
E None (always hits)
F None (always hits)

Damage Calculations

These are the damage functions according to an unmodded FF7-ENG 1.02 (1998)

Standard Formulae

X0:

0x5DE5C0 

Sets Target's 02h flag to 1. (Unknown effect)

X1:

0x5DE5DF 

If Attack Property "Always Critical" is Set
	Set Critical Damage Flag
End If

x = ( Actor's Level * Actor's (M)Attack ) / 32
y = ( Actor's Level + Actor's (M)Attack ) / 32
z = Actor's (M)Attack + ( x * y )
z = z * ( 512 - target's defense ) * Attack's Power
Damage = z >> 13
//This is a bit-shift left by 13 which is mathematically equivalent to dividing by 8192, but it's important to note that it doesn't actually divide as this is the source of the damage overflow glitch

If Critical Damage Flag is set
	Damage = Damage * 2
End If

If Actor's Statuses include Berserk
	Damage = Damage * 3 / 2
End If

Long_Range = 0
If Target is in Back Row
	Set Long_Range = 1
End If

If Attack is Short Range OR Command is Enemy Attack
	If Actor is in Back Row
		Long_Range = 1
	End If
Else
	Long_Range = 0
End If

If Long_Range != 0
	Damage = Damage / 2
End If

If Target is Defending
	Damage = Damage / 2
End If

If Target's Back is exposed
	Damage = Damage * ( Target's Back Attack Modifier / 8 )
End If

If Actor's Statuses includes Frog
	Damage = Damage / 4
End If

Damage = Sadness( Damage )
Damage = Split( Damage, 0 )
Damage = Barrier( Damage )
  
If Actor's Statuses include Mini
	Damage = 0
End If
Damage = Variance( Damage )

X2:

0x5DE9B8 

multiNoSplit = ( ( ( Attack's Target Flags AND Ch ) - 4 ) == 0 ? 1 : 0 )
Base = (Actor's Attack + Actor's Level) * 6
Damage = (512 - Target's Defense) * Base * Attack's Power / 8192
Damage = Sadness( Damage )
Damage = SplitDamage( Damage, multiNoSplit )
Damage = Barrier( Damage )
Damage = Variance( Damage )

X3:

0x5DEA6D 

If Attack Properties Damage MP is clear
	Damage = Target's HP
Else
	Damage = Target's MP
End If

Damage = Damage * Attack's Power / 32

If ActionData[AC] != 0 (?)
	Damage = Damage / 2
End If

X4:

0x5DEAF7 

If Attack Properties Damage MP is clear
	Damage = Target's MHP
Else
	Damage = Target's MMP
End If

Damage = Damage * Attack's Power / 32

If ActionData[AC] != 0 (?)
	Damage = Damage / 2
End If

X5:

0x5DEB81 

Damage = (Actor's (M)Attack + Actor's Level) * 6 + (Attack's Power * 22)
Damage = SplitDamage( Damage )
Damage = Barrier( Damage )
Damage = Variance( Damage )

X6:

0x5DEBE5 

Damage = Attack's Power * 20

X7:

0x5DEC0A 

Damage = ( ( 512 - Target's Def ) * Attack's Power / 32 )
Damage = Variance( Damage )

X8:

0x5DEC52 

If ActionData[0x230] AND 40h
	ActionData[0x230] = 1
Else
	ActionData[0x230] = 80h
End If
//presumably this checks if the target heals from restore element and will either recover or kill based on the result

X9:

0x5DEC8A 

Actor's Attack = Actor's Strength * 2
Use Damage X1 with adjusted stat

XA:

0x5DECAA 

Damage = ( Attack's Power + Number of Targets - 1 ) / Number of Targets

Additional Checks

Sadness( Damage )

0x5DE958 

If Target's Status includes Sadness
	Damage = Damage - (Damage * 3 / 10)
End If
Return Damage

SplitDamage( Damage, multiNoSplit )

0x5DE8F4 

If multiNoSplit == 0
	If No. of Attack's Targets >= 2
		Set Attack's split damage Target Flag
	Else
		Set multiNoSplit == 1
	End If
End If

If ActionData[0xAC] == 0
	Damage = Damage / 2
Else
	If multiNoSplit == 0
		Damage = Damage * 3 / 2
	End If
End If
Return Damage

Barrier( Damage )

0x5DE82C 

If Attack Property "Physical" is 0
	If Target's Statuses include MBarrier
		Set ActionData "MBarrier Active" flag
	End If
Else
	If Target's Statuses include Barrier
		Set ActionData "Barrier Active" flag
	End If
End If

If ActionData "MBarrier Active" or "Barrier Active" flags are set
	Damage = Damage / 2
End If

If attack is Magic and EnabledMagic[7] == 0 (?)
	Damage = Damage + ( Damage * ( EnabledMagic[7] * (10 / 32) ) / 100 )
End If
Return Damage

Variance( Damage ):

0x5DE988 

Damage = Damage ([0..255] + 3841) >> 12  //from RNGLUT in KERNEL.BIN
//Again, we have another chance for overflow.

If Damage == 0
	Damage == 1
End If
Return Damage

Secondary Damage Formulae

X0:

0x5DECFB 

Damage = Attacker's HP

X1:

5DED1E 

Damage = Attacker's MHP - Attacker's HP

X8:

0x5DED73 

Dice_Count = Attacker's Level / 10

If Dice_Count < 2 then
	Dice_Count = 2
Elseif Dice_Count > 6
	Dice_Count = 6
End If

total_dice_roll = 0
For ( d_loop = 0; d_loop < Dice_Count; d_loop++ )
	die = [0..5]
	all_dice[d_loop] = die
	total_dice_roll += die + 1

	set die visualization based on roll
Loop

value_repeat = 0
For ( d_value = 0; d_value < 6; d_value++ )

	repeat_count = 0
	For ( d_loop = 0; d_loop < Dice_Count; d_loop++ )

		If all_dice[d_loop] = d_value then
			repeat_count++
		End If
	Loop

	If repeat_count > value_repeat then
		value_repeat = repeat_count
	End If

Loop

Damage = value_repeat * 100 * total_dice_roll

X9

0x5DEEEF 

Damage = Number of Successful Escapes

XA

0x5DEF1D 

Damage = Target's HP - 1

XB

0x5DEF44 

Damage = (Game Time Hours * 100) + (Game Time Minutes)

XC

0x5DEF88 

Damage = Target's Kill Count * 10
//This is intended to be used only on players
//This will cause a memory leak if done on enemies

XD

0x5DEFDD 

If target is playable character
	MateriaCount = 0;
	For ( MateriaLoop = 0; MateriaLoop < 8; MateriaLoop++ )
		If target has materia in weapon slot [MateriaLoop] then MateriaCount++
		If target has materia in armor slot [MateriaLoop] then MateriaCount++
	Loop
	Damage = MateriaCount * 1111
End If

Accuracy Functions

The point of these is to set the "attack will miss" flag in the current action memory structure.

0: Physical Accuracy Check

0x5DDBB0 

;For the purposes of this code, "Dex" means the adjusted Dexterity of the actor/target if any in-battle dex bonuses have been granted.
;Same holds for the Physical Evade. Physical Hit rate has no in-game bonus opportunities.

Check_For_Cover()

HitChance = -1;

If "Always connect" flag set then HitChance = 255;

If target has one of the following statuses (Death, Sleep, Confu, Stop, Petrify, Manipulate, Paralysis) then
	Remove Sleep status
	Remove Confu status
	Remove Manipulate status
	HitChance = 255
End If

If action is flagged as "always hit" then HitChance = 255;

Physical Chance = (Actor's Dex >> 2) + action physical hit rate
If Actor is enemy then
	Actor's evade = Actor's Physical evade
else
	Actor's evade = (Actor's Dex >> 2) + Actor's Physical evade
End If
If Target is enemy then
	Target's evade = Target's Physical evade
Else
	Target's evade = (Target's Dex >> 2) + Target's Physical evade
End If

If HitChance = -1 Then
	HitChance = Physical Chance + Actor's evade - Target's evade
	HitChance = FuryAdjust(HitChance)
End If

If HitChance = 0 then HitChance = 1

Luck Chance = [0..99]
If (Actor's Luck / 4) > Luck Chance Then
	HitChance = 255 ;Lucky Hit
Else
	If Actor is Player Character targetting an enemy Then
		If (Target's Luck / 4) > Luck Chance
			HitChance = 0 ;Lucky Dodge
		End If
	End If
End If

Miss Chance = (([0..65535] * 99) / 65535) + 1 ;essentially [1..100]
if HitChance < Miss Chance then
	Set Miss flag
End If

Check_For_Cover

This is where the game checks if the target is covered under a "cover"ing ally. It only applies to Player Characters It might be more complicated than I'm seeing, but that is definitely ONE of its functions

FuryAdjust(HitChance)

	If HitChance < 255 then 
		If Actor is in Fury Status
			HitChance = HitChance - ((HitChance * 3) / 10)
		End If
	End If
	return HitChance

1: Magical Accuracy Check

0x5DDE5E 

acc = Action's Accuracy
tar_save = level / 2; //rounded down
acc_bonus = actor's level - tar_save
rand_0 = [0..99]
rand_1 = [0..99]
if acc < 255 then
   if target does not have instant-death, null, or heal properties to current attack then
      if attack is not (reflectable and target in reflect status) then
         if attack does not inflict statuses or inflicting status include: Death, Sleep, Confu, Stop, Petrify, or Paralysis then
            acc = Fury_Adj( acc );
            if target's M_Evade > rand_0 OR
                acc + acc_bonus < rand_1 then
               Set action miss flag
            end if
         end if
      end if
   end if
end if

2: Critical Hit Check

0x5DDF8E 

If attack does not miss then
   if actor in lucky girl status then
      critical_chance = 255
   else
      critical_chance = ((actor's luck + actor's level) - target's level ) >> 2;
      if actor is playable character then
         critical_chance += weapon's critical bonus //?
      end if
      Critical_random = ( ( [0..65535] * 99 ) / 65535 ) + 1;
      if critical_chance > critical_random then
         attack set to critical
      end if
   end if
end if

3, 4, and 5 don't exist. Since they don't set miss they will always hit.

6: Manipulate Accuracy (intended solely for playable characters)

0x5DE0D0 

int ally_loop;
ManipSuccess = 0;
for ( ally_loop = 0; ally_loop < 3; ally_loop++ )
{
   if target is currently under manipulation by an actor then
      break;
   end if
}
if target is not currently being manipulated AND
    target is not a playable character AND
    target is an enemy AND
    actor is not currently manipulating an enemy AND
    target is not under manipulate status AND
    target's timer bar is running AND //like they're not stopped, petrified, etc
    target's attack resistance is "always-hit" then //?
   Manip_Chance = actor's level + 50 - target's level; //no less than 0
   if target count > 1 then
      Manip_Chance = ( Manip_Chance << 2 ) / 5;
   end if
   if actor's [0xAC] == 0 then
      Manip_Chance >> 1;
   end if
   if target's attack resistance is "always-hit" then
      Manip_Chance = 255;
   end if
   if actor's accessory property == 5 //"Increase manip rate" property on Hypnocrown
      if Manip_Chance < 100 then
         Manip_Chance = 100;
      end if
   end if
   If Manip_Chance > [0..99] then
      ManipSuccess = 1;
   end if
end if
If ManipSuccess == 1 then
   Set actor's manipulated enemy to target
   Display String 5Ah {"Manipulated <Enemy>"}
   Clear Actor's 0xE4 value //unknown
else
   Set attack missed
end if

This doesn't actually place the target in the manipulate status. That happens elsewhere.

7: Level-based Accuracy

0x5DE08A 

If Action's Accuracy > 0 then
   If the remainder of ( Target's level / Action accuracy ) is non-zero then
      Set attack missed
   end if
end if

So if the accuracy IS 0, then it will always hit. This is to prevent a divide by zero error.

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