Difference between revisions of "Usable Ability Setting/ENTD AI Calculations"
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BATTLE.BIN : Usable Ability Setting/ENTD AI Calculations | BATTLE.BIN : Usable Ability Setting/ENTD AI Calculations | ||
| + | Set AI move List (AI 0xef0) , Unit AI 0x182c byte 0x04 (flags 0x1 0x2 and 0x4) and AI 0x19a1 | ||
--------------------------------------------------------------------------- | --------------------------------------------------------------------------- | ||
Parameters - r4 : Unit ID | Parameters - r4 : Unit ID | ||
| Line 304: | Line 305: | ||
- Store Silence Mod (4*Silencable/Total) | - Store Silence Mod (4*Silencable/Total) | ||
- Store MP usage mod (4*Use MP/Total) | - Store MP usage mod (4*Use MP/Total) | ||
| + | Note : 4th Monster Abilities are ignored (not available 100% of the time) | ||
| − | '''2nd Part''' : | + | '''2nd Part''' : Set AI 0x182c Byte 0x04 flags 0x01 0x02 and 0x04 (based on ability type) |
| − | - First | + | - First disable the 3 flags |
| − | - If [Longbow Attack] or [Stop at obstacle] are ON : | + | - If [Longbow Attack] or [Stop at obstacle] are ON : keep flags OFF |
| − | - If [Linear Attack], [3-Direction Melee], [3 Direction Ranged] ar ON : | + | - If [Linear Attack], [3-Direction Melee], [3 Direction Ranged] ar ON : Enable flag 0x04 |
| − | - If [Non Spear-Target] is OFF : | + | - If [Non Spear-Target] is OFF : Enable Flag 0x04 (i didn't find any ability matching these conditions - All non spear ability stop at obstacles) |
| − | - If Ability Range < 3 and Ability is Evadable : | + | - If Ability Range < 3 and Ability is Evadable : Enable flag 0x04 - WARNING : i wonder if this is not a bug, and if this section were not meant to check 3 Directional in Ability data 2) |
| − | - If Range >3 (or <3 non evadable) : | + | - If Range >3 (or <3 non evadable / not 3 directional) : |
| − | - If Ability can't hit Caster/Ally | + | - If Ability can't hit Caster/Ally : Enable flag [0x02 Unknwon] (no collateral Dmg ?) |
- If Ability can Hit Caster/Allies but AoE = 0 : Enable flag [0x02 Unknwon] | - If Ability can Hit Caster/Allies but AoE = 0 : Enable flag [0x02 Unknwon] | ||
| − | + | ||
| − | |||
'''3rd Part''' - | '''3rd Part''' - | ||
The AI setting flag 0x08 at Unit 0x167 is labeled [Defensive] in Patcher or [Coward-like] in wiki. In this routine, it seems to be a flag for a peculiar AI behavior. | The AI setting flag 0x08 at Unit 0x167 is labeled [Defensive] in Patcher or [Coward-like] in wiki. In this routine, it seems to be a flag for a peculiar AI behavior. | ||
If this flag is OFF, the last part of this routine will be ignored. | If this flag is OFF, the last part of this routine will be ignored. | ||
Check ENTD AI flags (Unit 0x167 and 0x168) : | Check ENTD AI flags (Unit 0x167 and 0x168) : | ||
| − | - No [Defensive] --> Nothing done | + | - No [Defensive] flag --> Nothing done (AI 0x19a1 is not updated) |
- [Defensive] + [Preserve CT] --> Store 0x11 at 0x8019f3c4 + 0x19a1 | - [Defensive] + [Preserve CT] --> Store 0x11 at 0x8019f3c4 + 0x19a1 | ||
- [Defensive] without [Focus unit] --> Nothing | - [Defensive] without [Focus unit] --> Nothing | ||
- [Defensive] + [Focus Unit] without valid Target --> Disable [Defensive] | - [Defensive] + [Focus Unit] without valid Target --> Disable [Defensive] | ||
| − | - [Defensive] + [Focus Unit] wihout [Agressive] --> Unit ID in AI | + | - [Defensive] + [Focus Unit] wihout [Agressive] --> Unit ID in AI 0x182c byte 0x05 |
- [Defensive] + [Focus Unit] + [Agressive] --> Unit ID in AI decision 0x05 + in Unit Battle 0x1b9 | - [Defensive] + [Focus Unit] + [Agressive] --> Unit ID in AI decision 0x05 + in Unit Battle 0x1b9 | ||
- If focused unit is an Ally --> store 0x0e at 0x8019f3c4 + 0x19a1 | - If focused unit is an Ally --> store 0x0e at 0x8019f3c4 + 0x19a1 | ||
- If focused unit is an enemy --> store 0x0c at 0x8019f3c4 + 0x19a1 | - If focused unit is an enemy --> store 0x0c at 0x8019f3c4 + 0x19a1 | ||
| + | |||
| + | '''Bug ?''' : The evadable check at 0x0019a0d4 is odd. It could be a missed 3-Directional check. | ||
| + | |||
=== Hard Coding === | === Hard Coding === | ||
Ability Flag [0x01 - Evade with Motion], [0x02 Unknown] [0x04 Use Weapon flag] are disabled in AI move list ( 0x8019f3c4 + 0x0ef0) | Ability Flag [0x01 - Evade with Motion], [0x02 Unknown] [0x04 Use Weapon flag] are disabled in AI move list ( 0x8019f3c4 + 0x0ef0) | ||
| Line 334: | Line 338: | ||
=== Return locations === | === Return locations === | ||
'''Battle.bin''' | '''Battle.bin''' | ||
| − | 00068f3c: [[Special_Status_Flag_Enabling | + | 00068f3c: [[Special_Status_Flag_Enabling|Special_Status_Flag_Enabling]] - Remove Frog |
| − | 00069040: [[Special_Status_Flag_Enabling | + | 00069040: [[Special_Status_Flag_Enabling|Special_Status_Flag_Enabling]] - Inflict Frog |
| − | 000751a8: [[Decide_what_to_do_based_on_skillset/ability_selections | + | 000751a8: [[Decide_what_to_do_based_on_skillset/ability_selections]] |
00075514: [[Set_move/act_based_on_skillset]] - Equip change | 00075514: [[Set_move/act_based_on_skillset]] - Equip change | ||
0008355c: [[Poach/Morbol_Transformation]] | 0008355c: [[Poach/Morbol_Transformation]] | ||
Latest revision as of 19:09, 14 July 2024
BATTLE.BIN : Usable Ability Setting/ENTD AI Calculations Set AI move List (AI 0xef0) , Unit AI 0x182c byte 0x04 (flags 0x1 0x2 and 0x4) and AI 0x19a1 --------------------------------------------------------------------------- Parameters - r4 : Unit ID Returns Nothing Set AI move List - Some AI decision/behavior flags --------------------------------------------------------------------------- 00199ec8: 27bdffc0 addiu r29,r29,-0x0040 | 00199ecc: afb5002c sw r21,0x002c(r29) | 00199ed0: 0080a821 addu r21,r4,r0 |r21 = Unit's ID 00199ed4: afb30024 sw r19,0x0024(r29) | 00199ed8: 3c13801a lui r19,0x801a | 00199edc: 2673f3c4 addiu r19,r19,0xf3c4 |r19 = Pointer to AI Data 8019f3c4 00199ee0: 001510c0 sll r2,r21,0x03 |ID 8 00199ee4: 00551023 subu r2,r2,r21 |ID 7 00199ee8: 00021180 sll r2,r2,0x06 |ID 0x1c0 - Unit offset 00199eec: 3c038019 lui r3,0x8019 | 00199ef0: 246308cc addiu r3,r3,0x08cc | 00199ef4: afb60030 sw r22,0x0030(r29) | 00199ef8: 0043b021 addu r22,r2,r3 |r22 = Pointer to Unit's Data 00199efc: afbf003c sw r31,0x003c(r29) | 00199f00: afbe0038 sw r30,0x0038(r29) | 00199f04: afb70034 sw r23,0x0034(r29) | 00199f08: afb40028 sw r20,0x0028(r29) | 00199f0c: afb20020 sw r18,0x0020(r29) | 00199f10: afb1001c sw r17,0x001c(r29) | 00199f14: afb00018 sw r16,0x0018(r29) | 00199f18: 92c30001 lbu r3,0x0001(r22) |Load Unit's ID 00199f1c: 340200ff ori r2,r0,0x00ff | 00199f20: 106200dd beq r3,r2,0x0019a298 #If Unit doesn't exist : Exit 00199f24: 02b31021 addu r2,r21,r19 |AI pointer + Unit offset (1 byte) 00199f28: 9042198c lbu r2,0x198c(r2) |Load Unit's Battle ID? 00199f2c: 00000000 nop | 00199f30: 2c420010 sltiu r2,r2,0x0010 |Check if ID is valid (<0x10) 00199f34: 104000d8 beq r2,r0,0x0019a298 #If Unit ID is invalid Exit 00199f38: 00000000 nop | 00199f3c: 0c0668bc jal 0x0019a2f0 |-->Set AI Flags/Usable Abilities Set Unit List of usable moves (0x8019f3c4 - 0x0ef0) 00199f40: 0000a021 addu r20,r0,r0 |Number of Abilities = 0 00199f44: 0000f021 addu r30,r0,r0 |MP Using Abilities = 0 00199f48: 0000b821 addu r23,r0,r0 |Silence Blocked Abilities = 0 00199f4c: 00009021 addu r18,r0,r0 |Counter = 0 00199f50: 00151100 sll r2,r21,0x04 |Unit's ID 16 (unit offset) 00199f54: 2442182c addiu r2,r2,0x182c |+ AI decision data offset 00199f58: 00538821 addu r17,r2,r19 |Unit's AI decision data pointer (AI 0x182c) 00199f5c: 340200ff ori r2,r0,0x00ff |r2 = 0x0ff 00199f60: afa00010 sw r0,0x0010(r29) |Store Evadeable Abilities = 0 On stack 00199f64: a2200009 sb r0,0x0009(r17) |Store Highest MP Cost = 0 AI decision data (AI 0x182c) 00199f68: a222000a sb r2,0x000a(r17) |Store Lowest MP Cost = 0xFF AI decision data (AI 0x182c) 00199f6c: 02751021 addu r2,r19,r21 | === ABILITY LOOP === @LOOP through all abilities from unit list of usable abilities (AI 0xef0) 00199f70: 9043198c lbu r3,0x198c(r2) |Load Considered Unit's Battle ID AI 0x198c + Unit Offset 00199f74: 00000000 nop | 00199f78: 00031100 sll r2,r3,0x04 |ID 16 00199f7c: 00431021 addu r2,r2,r3 |ID 17 00199f80: 000210c0 sll r2,r2,0x03 |ID 0x88 (Unit offset) 00199f84: 24420ef0 addiu r2,r2,0x0ef0 |+ List of usable moves offset 00199f88: 02621021 addu r2,r19,r2 |Pointer to unit list of usable moves (AI 0xef0 + Considered Unit offset) 00199f8c: 00121880 sll r3,r18,0x02 |Counter 4 00199f90: 00438021 addu r16,r2,r3 |Pointer to this iteration Ability in unit list of usable moves (AI 0xef0 + Unit offset + This Ability Offset) 00199f94: 92030002 lbu r3,0x0002(r16) |Load Ability's Skillset 00199f98: 340200ff ori r2,r0,0x00ff |r2 = 0xFF 00199f9c: 1062006b beq r3,r2,0x0019a14c #If The code reach the end of the list : Exit loop Skillset 0xff is a end marker 00199fa0: 02802021 addu r4,r20,r0 |r4 = Number of Abilities 00199fa4: 0c06561e jal 0x00195878 |-->AI Ability Data Setting Transfer data from r4 to AI used Ability data ( 8019f3c4 ) 00199fa8: 02002021 addu r4,r16,r0 |Send Ability pointer (AI 0xef0) 00199fac: 96020002 lhu r2,0x0002(r16) |Load Ability's Skillset From Move List 0x8019f3c4 + 0x0ef0 00199fb0: 00000000 nop | 00199fb4: 30420800 andi r2,r2,0x0800 |Check [Requires Monster Skill] 00199fb8: 14400022 bne r2,r0,0x0019a044 #If Monster skill is needed Ignore Evade, Silence and MP mods Since ability won't be available 100% of the time ? 00199fbc: 26940001 addiu r20,r20,0x0001 |Total Abilities + 1 -=- Set Silence and Evade mods and MP thresholds -=- 00199fc0: 8e63000c lw r3,0x000c(r19) |Load AI Behavior Flags 8019f3c4 + 0x0c 00199fc4: 00000000 nop | 00199fc8: 30620100 andi r2,r3,0x0100 |Check [Ignore Silence] It is a reversed flag - 0 for ignoring silence, 1 for not ignoring 00199fcc: 10400002 beq r2,r0,0x00199fd8 #If Ability is affected by silence 00199fd0: 30620200 andi r2,r3,0x0200 |Check [Evadable] 00199fd4: 26f70001 addiu r23,r23,0x0001 |Silencable Abilities + 1 00199fd8: 10400005 beq r2,r0,0x00199ff0 #If Ability is Evadable 00199fdc: 00000000 nop | 00199fe0: 8fa80010 lw r8,0x0010(r29) |Load Evadable abilities counter 00199fe4: 00000000 nop | 00199fe8: 25080001 addiu r8,r8,0x0001 |Counter + 1 00199fec: afa80010 sw r8,0x0010(r29) |Store new Evadeable Abilities counter 00199ff0: 92630011 lbu r3,0x0011(r19) |Load Ability's MP Cost 8019f3c4 + 0x11 00199ff4: 00000000 nop | 00199ff8: 10600012 beq r3,r0,0x0019a044 #If Ability has a MP cost 00199ffc: 00000000 nop | 0019a000: 92220009 lbu r2,0x0009(r17) |Load Highest MP Cost In AI decision data - 8019f3c4 + 0x182c + 0x09 0019a004: 00000000 nop | 0019a008: 0043102b sltu r2,r2,r3 |Check MP cost vs Highest MP cost 0019a00c: 10400004 beq r2,r0,0x0019a020 #If This iteration Ability has the highest MP cost 0019a010: 27de0001 addiu r30,r30,0x0001 |MP Using Abilities + 1 0019a014: 92620011 lbu r2,0x0011(r19) |Load Ability's MP Cost 0019a018: 00000000 nop | 0019a01c: a2220009 sb r2,0x0009(r17) |Store new Highest MP Cost In AI decision data - 8019f3c4 + 0x182c + 0x09 0019a020: 92620011 lbu r2,0x0011(r19) |Load Ability's MP Cost 0019a024: 9223000a lbu r3,0x000a(r17) |Load Lowest MP Cost 0019a028: 00000000 nop | 0019a02c: 0043102b sltu r2,r2,r3 |Check if tAbility has the lowest MP cost 0019a030: 10400004 beq r2,r0,0x0019a044 #If This iteration Ability has the lowest MP cost 0019a034: 00000000 nop | 0019a038: 92620011 lbu r2,0x0011(r19) |Load Ability's MP Cost 0019a03c: 00000000 nop | 0019a040: a222000a sb r2,0x000a(r17) |Store new Lowest MP Cost In AI decision data - 8019f3c4 + 0x182c + 0x0a -=- Manage AI 0xef0 Byte 0x04's Flags 0x01 0x02 and 0x04 -=- 0019a044: 92020003 lbu r2,0x0003(r16) |Load Usage Type (AI 0xef0 byte 0x03) 0019a048: 00000000 nop | 0019a04c: 304200f8 andi r2,r2,0x00f8 | 0019a050: a2020003 sb r2,0x0003(r16) |Disable 0x01 (Evade with motion) 0x02 (unknown) and 0x04 (Use weapon range) 0019a054: 8e62000c lw r2,0x000c(r19) |Load Ability's AI Flags 8019f3c4 + 0x0c 0019a058: 3c0300c0 lui r3,0x00c0 | 0019a05c: 00431024 and r2,r2,r3 |Check [Longbow] and [Stop at Obstacle] 0019a060: 14400035 bne r2,r0,0x0019a138 #If Ability is Arcing or Stop at Obstacle next Ability 0019a064: 00000000 nop | 0019a068: 9262000e lbu r2,0x000e(r19) |Load Ability's AI Flags 3 8019f3c4 + 0x0e 0019a06c: 00000000 nop | 0019a070: 3042003c andi r2,r2,0x003c |Check [Linear Attack] , [Non Spear], [3 direction melee], [3 Direction ranged] Non spear is a reverted flag (0x1 if unchecked) 0019a074: 10400004 beq r2,r0,0x0019a088 #If Ability has [Linear Attack], [3 direction melee], [3 direction ranged] or not [Non spear Target] 0019a078: 00000000 nop | 0019a07c: 96020002 lhu r2,0x0002(r16) |Load Ability's Skillset/Usage Type? From Ability List 0x8019f3c4 + 0x0ef0 (0x02 and 0x03) 0019a080: 0806684d j 0x0019a134 >>Jump to Update AI 0xef0 byte 0x04 (enable flag 0x04) 0019a084: 34420400 ori r2,r2,0x0400 |Enable 0x04 Else : Ability is not a Linear attack, a spear attack nor a 3 directionnal attack 0019a088: 86640002 lh r4,0x0002(r19) |Load Ability ID From 0x80193fc4 + 0x02 0019a08c: 00000000 nop | 0019a090: 28820170 slti r2,r4,0x0170 |Check if Ability has a second data table 0019a094: 10400020 beq r2,r0,0x0019a118 #If Ability do not have a second data table : branch to AoE check 0019a098: 00000000 nop | 0019a09c: 92620004 lbu r2,0x0004(r19) |Load Ability's Range From 0x80193fc4 + 0x04 0019a0a0: 92630005 lbu r3,0x0005(r19) |Load Ability's AoE From 0x80193fc4 + 0x05 0019a0a4: 00000000 nop | 0019a0a8: 00431021 addu r2,r2,r3 |Max Reach = Range + AoE 0019a0ac: 28420003 slti r2,r2,0x0003 |0x01 if max reach is < 0x3 0019a0b0: 1040000d beq r2,r0,0x0019a0e8 #If Max reach < 3 I don't really get what's happening here... 0019a0b4: 000410c0 sll r2,r4,0x03 | 0019a0b8: 00441023 subu r2,r2,r4 | 0019a0bc: 00021040 sll r2,r2,0x01 |Ability ID 0x0e (Ability offset) 0019a0c0: 3c018006 lui r1,0x8006 | 0019a0c4: 00220821 addu r1,r1,r2 | 0019a0c8: 9022fbf6 lbu r2,-0x040a(r1) |Load Ability's Flags 4 SCUS data : 0x8005fbf0 + 0x06 + Ability offset 0019a0cc: 00000000 nop | 0019a0d0: 30420002 andi r2,r2,0x0002 |Check [Evadable] 0019a0d4: 10400004 beq r2,r0,0x0019a0e8 #If Ability has [evadable] flag in data 2 Error while 3 Direction check ? (would make more sense) 0019a0d8: 00000000 nop | 0019a0dc: 96020002 lhu r2,0x0002(r16) |Load Ability's Skillset/Usage Type? From Ability List 0x8019f3c4 + 0x0ef0 (0x02 and 0x03) 0019a0e0: 0806684d j 0x0019a134 >>Jump to Update AI 0xef0 byte 0x04 (enable flag 0x04) 0019a0e4: 34420400 ori r2,r2,0x0400 |Enable 0x04 ( Evadable flag ?) Else : Reach > 3 or not 3 direction 0019a0e8: 86620002 lh r2,0x0002(r19) |Load Ability ID 8019f3c4 + 0x02 0019a0ec: 00000000 nop | 0019a0f0: 000218c0 sll r3,r2,0x03 | 0019a0f4: 00621823 subu r3,r3,r2 | 0019a0f8: 00031840 sll r3,r3,0x01 |Ability ID 0x0e (Ability offset) 0019a0fc: 3c018006 lui r1,0x8006 | 0019a100: 00230821 addu r1,r1,r3 | 0019a104: 9022fbf4 lbu r2,-0x040c(r1) |Load Ability's Flags 2 SCUS data : 0x8005fbf0 + 0x04 + Ability offset 0019a108: 00000000 nop | 0019a10c: 30420041 andi r2,r2,0x0041 |Check [Hit Ally] and [Hit Caster] 0019a110: 14400005 bne r2,r0,0x0019a128 #If Ability cannot hit Caster team : branch to Enable flag 0x02 Two reverted flags (0 if can hit) 0019a114: 00000000 nop | Else : No second Table or Can Hit Allies 0019a118: 92620005 lbu r2,0x0005(r19) |Load AoE From 0x80193fc4 + 0x05 0019a11c: 00000000 nop | 0019a120: 14400005 bne r2,r0,0x0019a138 #If AoE > 0 Next iteration (Can Hit Allies but no AoE = no risk of collateral damage ?) 0019a124: 00000000 nop | --- Enable flag 0x02 (No risk of hitting Ally and not 3 directional nor linear 0019a128: 96020002 lhu r2,0x0002(r16) |Load Skillset/Usage Type? 0019a12c: 00000000 nop | 0019a130: 34420200 ori r2,r2,0x0200 |Enable 0x02 --- Update AI 0xef0 - Byte 0x04 --- 0019a134: a6020002 sh r2,0x0002(r16) |Store new Skillset/Usage Type? 0019a138: 26520001 addiu r18,r18,0x0001 |LOOP counter + 1 0019a13c: 2a420022 slti r2,r18,0x0022 |Check counter vs limit 0019a140: 1440ff8b bne r2,r0,0x00199f70 Λ LOOP Branch if Counter < 34 0019a144: 02751021 addu r2,r19,r21 |r2 = AI Data Pointer + unit offset (load Battle ID at 0x198c when the loop starts) === Update Unit AI 0x182c data === 0019a148: 02802021 addu r4,r20,r0 |Divisor = Number of Abilities 0019a14c: 0c0668b3 jal 0x0019a2cc |-->Dividend * 4 / Divisor Returns r2 = r54/r4 0019a150: 02e02821 addu r5,r23,r0 |Dividend = Nb Of Ability affected by silence 0019a154: 02802021 addu r4,r20,r0 |Divisor = Number of Abilities 0019a158: 03c02821 addu r5,r30,r0 |Dividend = Nb Of Ability with a MP cost 0019a15c: 0c0668b3 jal 0x0019a2cc |-->Dividend * 4 / Divisor 0019a160: a222000c sb r2,0x000c(r17) |Store Silence effectivness Mod AI 0x182c + 0x0c 0019a164: 8fa50010 lw r5,0x0010(r29) |Dividend - load Evadable Abilities 0019a168: 02802021 addu r4,r20,r0 |Divisor = Number of Abilities 0019a16c: 0c0668b3 jal 0x0019a2cc |-->Dividend * 4 / Divisor Return Evade mod (stored below) 0019a170: a222000b sb r2,0x000b(r17) |Store MP Using Mod AI 0x182c + 0x0b === Store ENTD Data === 0019a174: 26240004 addiu r4,r17,0x0004 |AI decision + 0x04 (ENTD - settings) 0019a178: 26c50167 addiu r5,r22,0x0167 |r5 = Pointer to Unit's ENTD AI setting 0x801908cc + 0x167 0019a17c: 34060005 ori r6,r0,0x0005 |Limit = 5 0019a180: 0c066ad2 jal 0x0019ab48 |-->Transfer Byte Values Transfer Bytes from 0x167 to 16b to AI decision 0x04 to 0x8 0019a184: a222000d sb r2,0x000d(r17) |Store Evade Mod AI 0x182c + 0x0d 0019a188: 92c20165 lbu r2,0x0165(r22) |Load ENTD X Location Battle data 0019a18c: 92230004 lbu r3,0x0004(r17) |Load AI Setting - Behavior Just filled with battle 0x167 in routine above 0019a190: a2220000 sb r2,0x0000(r17) |Store X Location to stay near AI 0x182c + 0x00 0019a194: 92c20166 lbu r2,0x0166(r22) |Load AI Y Location Battle data 0019a198: 00000000 nop | 0019a19c: a2220002 sb r2,0x0002(r17) |Store Y Location to stay near AI 0x182c + 0x02 0019a1a0: 92c20167 lbu r2,0x0167(r22) |Load Unit 0x167 (elevation + behavior) Battle data 0019a1a4: a2200003 sb r0,0x0003(r17) |Nullify/Initialize AI decision 0x03 AI 0x182c + 0x03 0019a1a8: 000211c2 srl r2,r2,0x07 |0x80 (if Higher Elevation) 0019a1ac: a2220001 sb r2,0x0001(r17) |Store Higher Elevation Flag AI 0x182c + 0x01 === BEHAVIOR HANDLING === 0019a1b0: 30620008 andi r2,r3,0x0008 |Check [Defensive] Defensive in Patcher - Coward-like in Wiki 0019a1b4: 10400038 beq r2,r0,0x0019a298 #If [Defensive] if OFF Exit routine Seems to be a "peculiar behavior" flag 0019a1b8: 00000000 nop | 0019a1bc: 92220007 lbu r2,0x0007(r17) |Load AI Targeting flag (Copied from Unit battle 0x16a) 0019a1c0: 00000000 nop | 0019a1c4: 30420004 andi r2,r2,0x0004 |Check [Save-CT Protect Self] 0019a1c8: 10400007 beq r2,r0,0x0019a1e8 #If Unit setting do not have [Conserve CT] : branch to Focus section -=- CONSERVE CT -=- 0019a1cc: 34020011 ori r2,r0,0x0011 |r2 = 0x11 0019a1d0: 02751821 addu r3,r19,r21 |r2 = AI Data Pointer + unit offset 0019a1d4: 080668a6 j 0x0019a298 >>Else if [Conserve CT] : set Unit AI 0x19a1 == 0x11 and EXIT 0019a1d8: a06219a1 sb r2,0x19a1(r3) |Store 0x11 at 0x8019f34c4 + 0x19a1 + Unit offset (1 byte per unit) --- Backward branch section - Focus On Enemy - Aggressive --- 0019a1dc: 3402000c ori r2,r0,0x000c |r2 = 0x0c 0019a1e0: 080668a6 j 0x0019a298 |Set AI 0x19a1 = 0x0c and Exit 0019a1e4: a06219a1 sb r2,0x19a1(r3) |Store 0x0c at 0x8019f34c4 + 0x19a1 + Unit offset (1 byte per unit) -=- FOCUS Section -=- 0019a1e8: 30620040 andi r2,r3,0x0040 |check [Focus Unit] r3 = Battle 0x167 via AI 0x182c + 0x04 0019a1ec: 1040002a beq r2,r0,0x0019a298 #If Unit is not Focusing a Unit Exit routine 0019a1f0: 00009021 addu r18,r0,r0 |Counter = 0 0019a1f4: 340600ff ori r6,r0,0x00ff |r6 = 0xff 0019a1f8: 02752821 addu r5,r19,r21 |r5 = AI Pointer + Unit's ID 0019a1fc: 3407000e ori r7,r0,0x000e |r7 = 0x0e 0019a200: 00002021 addu r4,r0,r0 |Unit Offset (+0x01c0 each iteration) @LOOP through all units 0019a204: 3c018019 lui r1,0x8019 | 0019a208: 00240821 addu r1,r1,r4 | 0019a20c: 902208cd lbu r2,0x08cd(r1) |Load Unit's ID 0x801908cc + 0x01 + unit offset 0019a210: 00000000 nop | 0019a214: 10460018 beq r2,r6,0x0019a278 #If Unit do not exist : branch to Next unit iteration 0019a218: 00000000 nop | 0019a21c: 3c018019 lui r1,0x8019 | 0019a220: 00240821 addu r1,r1,r4 | 0019a224: 90230a2d lbu r3,0x0a2d(r1) |Load this iteration Unit's ENTD ID 0x81908cc + 0x161 + unit offset 0019a228: 92220005 lbu r2,0x0005(r17) |Load Acting Unit Main Target ID AI 0x182c + 0x05 filled with Battle 0x168 in this routine 0019a22c: 00000000 nop | 0019a230: 14620011 bne r3,r2,0x0019a278 #If This iteration unit is the Targeted Unit 0019a234: 00000000 nop | 0019a238: 92220004 lbu r2,0x0004(r17) |Load AI Behavior 0019a23c: 00000000 nop | 0019a240: 30420010 andi r2,r2,0x0010 |Check [Aggressive] 0019a244: 10400014 beq r2,r0,0x0019a298 #If Unit AI setting is not [Aggressive] : Update AI 0x182c + 0x05 and Exit routine 0019a248: a2320005 sb r18,0x0005(r17) |Store Unit Counter as Main target ID It should be already the case no ? Else : Unit is [Aggressive] 0019a24c: a2d201b9 sb r18,0x01b9(r22) |Store Main Target ID in acting unit data (0x1b9) 0019a250: 3c018019 lui r1,0x8019 | 0019a254: 00240821 addu r1,r1,r4 |Part of pointer to unit battle stats 0019a258: 90230a86 lbu r3,0x0a86(r1) |LoadThis iteration Unit's Modified ENTD Flags 0019a25c: 92c201ba lbu r2,0x01ba(r22) |Load Unit's Modified ENTD Flags 0019a260: 30630030 andi r3,r3,0x0030 |Check this iteration unit Team 0019a264: 30420030 andi r2,r2,0x0030 |Check Acting unit Team 0019a268: 1462ffdc bne r3,r2,0x0019a1dc #If Acting Unit target a foe : branch to Aggresive Enemy focus section (backward section) 0019a26c: 02751821 addu r3,r19,r21 |r3 = AI Pointer + Unit ID Else : Focus Ally 0019a270: 080668a6 j 0x0019a298 >>Jump to Set AI 0x19a1 = 0x0e and Exit routine 0019a274: a0a719a1 sb r7,0x19a1(r5) |Store 0x0e at 0x8019f34c4 + 0x19a1 + Unit offset (1 byte per unit) Else : This unit is not the targeted unit 0019a278: 26520001 addiu r18,r18,0x0001 |Unit ID + 1 0019a27c: 2a420015 slti r2,r18,0x0015 | 0019a280: 1440ffe0 bne r2,r0,0x0019a204 #Loop to next unit (0x15 times) 0019a284: 248401c0 addiu r4,r4,0x01c0 |Unit Data Offset (+0x01c0 each iteration) --- Unit has [Focus] and [Aggressive] But the targeted Unit is missing 0019a288: 92220004 lbu r2,0x0004(r17) |Load AI Behavior 0019a28c: 00000000 nop | 0019a290: 304200f7 andi r2,r2,0x00f7 | 0019a294: a2220004 sb r2,0x0004(r17) |Disable flag 0x08 (no peculiar behavior) AI 0x182c + 0x04 0019a298: 8fbf003c lw r31,0x003c(r29) 0019a29c: 8fbe0038 lw r30,0x0038(r29) 0019a2a0: 8fb70034 lw r23,0x0034(r29) 0019a2a4: 8fb60030 lw r22,0x0030(r29) 0019a2a8: 8fb5002c lw r21,0x002c(r29) 0019a2ac: 8fb40028 lw r20,0x0028(r29) 0019a2b0: 8fb30024 lw r19,0x0024(r29) 0019a2b4: 8fb20020 lw r18,0x0020(r29) 0019a2b8: 8fb1001c lw r17,0x001c(r29) 0019a2bc: 8fb00018 lw r16,0x0018(r29) 0019a2c0: 27bd0040 addiu r29,r29,0x0040 0019a2c4: 03e00008 jr r31 0019a2c8: 00000000 nop
Notes
1st Part : Loop through all abilities in Unit List of Moves (8019f3c4 - 0x0ef0) and store some data in AI Decision data ( 8019f3c4 + 182c)
- Determines if ability is evadable, silencable, has a MP cost.
- Store the Highest and Lowest MP cost in AI decision data
- Store Evade Mod (4*Evadable abilities/ Total abilities)
- Store Silence Mod (4*Silencable/Total)
- Store MP usage mod (4*Use MP/Total)
Note : 4th Monster Abilities are ignored (not available 100% of the time)
2nd Part : Set AI 0x182c Byte 0x04 flags 0x01 0x02 and 0x04 (based on ability type)
- First disable the 3 flags
- If [Longbow Attack] or [Stop at obstacle] are ON : keep flags OFF
- If [Linear Attack], [3-Direction Melee], [3 Direction Ranged] ar ON : Enable flag 0x04
- If [Non Spear-Target] is OFF : Enable Flag 0x04 (i didn't find any ability matching these conditions - All non spear ability stop at obstacles)
- If Ability Range < 3 and Ability is Evadable : Enable flag 0x04 - WARNING : i wonder if this is not a bug, and if this section were not meant to check 3 Directional in Ability data 2)
- If Range >3 (or <3 non evadable / not 3 directional) :
- If Ability can't hit Caster/Ally : Enable flag [0x02 Unknwon] (no collateral Dmg ?)
- If Ability can Hit Caster/Allies but AoE = 0 : Enable flag [0x02 Unknwon]
3rd Part -
The AI setting flag 0x08 at Unit 0x167 is labeled [Defensive] in Patcher or [Coward-like] in wiki. In this routine, it seems to be a flag for a peculiar AI behavior.
If this flag is OFF, the last part of this routine will be ignored.
Check ENTD AI flags (Unit 0x167 and 0x168) :
- No [Defensive] flag --> Nothing done (AI 0x19a1 is not updated)
- [Defensive] + [Preserve CT] --> Store 0x11 at 0x8019f3c4 + 0x19a1
- [Defensive] without [Focus unit] --> Nothing
- [Defensive] + [Focus Unit] without valid Target --> Disable [Defensive]
- [Defensive] + [Focus Unit] wihout [Agressive] --> Unit ID in AI 0x182c byte 0x05
- [Defensive] + [Focus Unit] + [Agressive] --> Unit ID in AI decision 0x05 + in Unit Battle 0x1b9
- If focused unit is an Ally --> store 0x0e at 0x8019f3c4 + 0x19a1
- If focused unit is an enemy --> store 0x0c at 0x8019f3c4 + 0x19a1
Bug ? : The evadable check at 0x0019a0d4 is odd. It could be a missed 3-Directional check.
Hard Coding
Ability Flag [0x01 - Evade with Motion], [0x02 Unknown] [0x04 Use Weapon flag] are disabled in AI move list ( 0x8019f3c4 + 0x0ef0) the [0x04 Use Weapon] and [0x02 Unknown] flags could be restored under condition (see notes)
Return locations
Battle.bin 00068f3c: Special_Status_Flag_Enabling - Remove Frog 00069040: Special_Status_Flag_Enabling - Inflict Frog 000751a8: Decide_what_to_do_based_on_skillset/ability_selections 00075514: Set_move/act_based_on_skillset - Equip change 0008355c: Poach/Morbol_Transformation 00083bf8: Set_targets_animation_based_on_attack_type - Broken item 00083c20: Set_targets_animation_based_on_attack_type - Stolen item 00199e20: Store_hardcoded_AI_stuff_(blood_suck,_frog,_berserk_abilities)
