Set Reachable Tiles

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BATTLE.BIN : Set Reachable Tiles
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Parameters : r4 - Acting Unit ID (or his mount)
Returns  : r2 = Reachable Tiles counter
           r2 = -0x01 if Invalid Unit
           
Spread Movement on Tiles
Once it's done :
 - All reachable tiles flag 0x20 is enabled on byte 0x05 (8018f8cc)
 - 8018f510 = 0x01
 - 8018f514 = Active Unit ID
------------------------------------------------------------------------------------------------------------
00174b8c: 27bdffd0 addiu r29,r29,-0x0030    |
00174b90: 000410c0 sll r2,r4,0x03           |Unit ID * 8
00174b94: 00441023 subu r2,r2,r4            |Unit ID * 7
00174b98: afb1001c sw r17,0x001c(r29)       |
00174b9c: 3c118019 lui r17,0x8019           |
00174ba0: 8e31f4e0 lw r17,-0x0b20(r17)      |Pointer to scratch pad 0x1f800000
00174ba4: 00021180 sll r2,r2,0x06           |Unit ID * 0x1c0
00174ba8: afb00018 sw r16,0x0018(r29)       |
00174bac: 3c108019 lui r16,0x8019           |
00174bb0: 8e10f4e4 lw r16,-0x0b1c(r16)      |Pointer to Scratch Pad 0x1f800180
00174bb4: 340300ff ori r3,r0,0x00ff         |
00174bb8: afbf0028 sw r31,0x0028(r29)       |
00174bbc: afb30024 sw r19,0x0024(r29)       |
00174bc0: afb20020 sw r18,0x0020(r29)       |
00174bc4: 3c018019 lui r1,0x8019            |
00174bc8: 00220821 addu r1,r1,r2            |Part of Pointer to Unit battle data
00174bcc: 902208cd lbu r2,0x08cd(r1)        |Load Unit battle ID 801908cc + 0x01 + Unit offset
00174bd0: 3c138019 lui r19,0x8019           |
00174bd4: 8e73f4f0 lw r19,-0x0b10(r19)      |Pointer to Scratch Pad 0x1f800200
00174bd8: 1043007f beq r2,r3,0x00174dd8     #If Unit doesn't exist (ID = 0xff)   Exit routine and returns -0x01
00174bdc: 2402ffff addiu r2,r0,-0x0001          |
00174be0: 0c05d10c jal 0x00174430           |-->Store_movement_stuff_into_scratch_pad
00174be4: 00000000 nop                      |
00174be8: 0c05d3a1 jal 0x00174e84           |-->Set Tile's Flags for pathfinding S-Pad 0x200 Grid, S-Pad 0x180
00174bec: 34040001 ori r4,r0,0x0001         |
00174bf0: 9223000e lbu r3,0x000e(r17)       |Load Acting Unit Move Type
00174bf4: 34020001 ori r2,r0,0x0001         |
00174bf8: 1462000a bne r3,r2,0x00174c24     #If Acting Unit can Teleport
00174bfc: 34030001 ori r3,r0,0x0001             |
00174c00: 341201ff ori r18,r0,0x01ff            |Initialize counter 
00174c04: 3c028019 lui r2,0x8019                |
00174c08: 244237d3 addiu r2,r2,0x37d3           |801937d3 -Pointer to End of Targetable grid data (last tile)
                                                @LOOP - through all Targetable grid Tiles (backward)
00174c0c: a0430000 sb r3,0x0000(r2)                 |Set all AoE flags to 0x01
00174c10: 2652ffff addiu r18,r18,-0x0001            |counter - 1
00174c14: 0641fffd bgez r18,0x00174c0c          Λ Loop 0x200 times
00174c18: 2442fffb addiu r2,r2,-0x0005              |Pointer -0x05
00174c1c: 0805d36d j 0x00174db4                 >>Avoid Non Teleport section
00174c20: 00000000 nop                              |
                                            Else : Unit is not teleporting
00174c24: 92220006 lbu r2,0x0006(r17)           |Load Acting Unit's Move
00174c28: 00000000 nop                          |
00174c2c: 18400061 blez r2,0x00174db4           #If Invalid (<= 0)  Abort Loop
00174c30: 00009021 addu r18,r0,r0               |Initialize Counter
                                                @LOOP - 1 Time per Active unit Movement
00174c34: 92020062 lbu r2,0x0062(r16)               |Load Acting Unit Move +1  (Because AoE ends at 0x1 not at 0x00)
00174c38: 00000000 nop                              |
00174c3c: 1040005d beq r2,r0,0x00174db4             #If Unit Move +1 = 0 :  Abort loop
00174c40: 00000000 nop                                  |
00174c44: a2000062 sb r0,0x0062(r16)                |Reset 0x62 (S-Pad 0x180)
00174c48: a600002a sh r0,0x002a(r16)                |Reset 0x2a (S-Pad 0x180)
                                                    @LOOP - Each Elevation
00174c4c: 8602002a lh r2,0x002a(r16)                    |Load Elevation counter
00174c50: a6000028 sh r0,0x0028(r16)                    |Reset Y counter (New elevation)
00174c54: 00021200 sll r2,r2,0x08                       |
00174c58: a602002c sh r2,0x002c(r16)                    |Store Elevation offset (0 or 0x100)
00174c5c: 92220019 lbu r2,0x0019(r17)                   |Load Map Max Y
00174c60: 00000000 nop                                  |
00174c64: 10400045 beq r2,r0,0x00174d7c                 #If Invalid max Y : branch to  Next Elevation iteration
00174c68: 00000000 nop                                      |
                                                        @LOOP - All Y rows
00174c6c: 86030028 lh r3,0x0028(r16)                        |Load Y counter
00174c70: 92220018 lbu r2,0x0018(r17)                       |Load Max X
00174c74: 00000000 nop                                      |
00174c78: 00620018 mult r3,r2                               |
00174c7c: a6000026 sh r0,0x0026(r16)                        |Reset X counter (new Y Row)
00174c80: 9603002c lhu r3,0x002c(r16)                       |Load Elevation offset
00174c84: 00001012 mflo r2                                  |Y * Max X
00174c88: 00621821 addu r3,r3,r2                            |
00174c8c: a603002e sh r3,0x002e(r16)                        |Store Elevation + Y*MaxX in 0x2e
00174c90: 92220018 lbu r2,0x0018(r17)                       |Load Max X
00174c94: 00000000 nop                                      |
00174c98: 1040002e beq r2,r0,0x00174d54                     #If Invalid max X : branch to   Next Y iteration
00174c9c: 00000000 nop                                          |
                                                            @LOOP - All Tiles (X coord) in a Y Row
00174ca0: 9602002e lhu r2,0x002e(r16)                           |Load Elevation + Y*MaxX
00174ca4: 96030026 lhu r3,0x0026(r16)                           |X counter
00174ca8: 00000000 nop                                          |
00174cac: 00431021 addu r2,r2,r3                                |
00174cb0: a602001a sh r2,0x001a(r16)                            |Store this iteration Tile ID
00174cb4: 00021400 sll r2,r2,0x10                               |
00174cb8: 00021343 sra r2,r2,0x0d                               |Tile ID * 8
00174cbc: 3c038019 lui r3,0x8019                                |
00174cc0: 2463f8cc addiu r3,r3,-0x0734                          |
00174cc4: 00431021 addu r2,r2,r3                                |This iteration Tile's data pointer ( 8018f8cc)    0x8018f8cc + Tile offset
00174cc8: 8604001a lh r4,0x001a(r16)                            |Load This iteration Tile ID
00174ccc: 3c038019 lui r3,0x8019                                |
00174cd0: 24632dd8 addiu r3,r3,0x2dd8                           |
00174cd4: ae020000 sw r2,0x0000(r16)                            |Store this Tile pointer at 0x00 (S-Pad 0x180)
00174cd8: 00041080 sll r2,r4,0x02                               |
00174cdc: 00441021 addu r2,r2,r4                                |Tile ID*5
00174ce0: 8604001a lh r4,0x001a(r16)                            |Load This iteration Tile ID
00174ce4: 00431021 addu r2,r2,r3                                |Pointer : This tile data in targetable grid table  80192dd8 + Tile offset
00174ce8: ae020008 sw r2,0x0008(r16)                            |Store this Tile pointer - targetable grid (S-Pad 0x180)
00174cec: 02642021 addu r4,r19,r4                               |Pointer : This iteration Tile data in S-Pad 0x200
00174cf0: 90830000 lbu r3,0x0000(r4)                            |Load This Tile S-Pad 0x200 data
00174cf4: 00000000 nop                                          |
00174cf8: 30620001 andi r2,r3,0x0001                            |Check [0x01] - First Active Unit Tile and Then Tile to spread the AoE from
00174cfc: 1040000b beq r2,r0,0x00174d2c                         #If This a Tile to spread the AoE from
00174d00: 306200fe andi r2,r3,0x00fe                                |Keep every other flags
00174d04: 0c05d7a8 jal 0x00175ea0                                   |-->Check_and_Spread_Movement_One_Tile_Around
00174d08: a0820000 sb r2,0x0000(r4)                                 |Update Tile's flags without 0x01
00174d0c: 9222001d lbu r2,0x001d(r17)                               |Load Acting Unit Fly/Teleport flag
00174d10: 00000000 nop                                              |
00174d14: 14400004 bne r2,r0,0x00174d28                             #If Unit cannot Fly     (Teleport Avoid this loop)
00174d18: 34020008 ori r2,r0,0x0008                                     |
00174d1c: 0c05d936 jal 0x001764d8                                       |-->Spread_Horizontal_Jump
00174d20: 00000000 nop                                                  |
00174d24: 34020008 ori r2,r0,0x0008                                     |
00174d28: a2020054 sb r2,0x0054(r16)                                |Restore counter at S-Pad 0x180 (0x54)
00174d2c: 96020026 lhu r2,0x0026(r16)                           |X Counter
00174d30: 00000000 nop                                          |
00174d34: 24420001 addiu r2,r2,0x0001                           |
00174d38: a6020026 sh r2,0x0026(r16)                            |Store X counter + 1
00174d3c: 00021400 sll r2,r2,0x10                               |
00174d40: 92230018 lbu r3,0x0018(r17)                           |Max X
00174d44: 00021403 sra r2,r2,0x10                               |
00174d48: 0043102a slt r2,r2,r3                                 |
00174d4c: 1440ffd4 bne r2,r0,0x00174ca0                     Λ Loop While X counter < Max X
00174d50: 00000000 nop                                          |
00174d54: 96020028 lhu r2,0x0028(r16)                       |Y counter
00174d58: 00000000 nop                                      |
00174d5c: 24420001 addiu r2,r2,0x0001                       |
00174d60: a6020028 sh r2,0x0028(r16)                        |Store Y counter +1
00174d64: 00021400 sll r2,r2,0x10                           |
00174d68: 92230019 lbu r3,0x0019(r17)                       |Load Max Y
00174d6c: 00021403 sra r2,r2,0x10                           |
00174d70: 0043102a slt r2,r2,r3                             |
00174d74: 1440ffbd bne r2,r0,0x00174c6c                 Λ Loop While Y counter < Map Max Y
00174d78: 00000000 nop                                      |
00174d7c: 9602002a lhu r2,0x002a(r16)                   |Load Elevation counter
00174d80: 00000000 nop                                  |
00174d84: 24420001 addiu r2,r2,0x0001                   |
00174d88: a602002a sh r2,0x002a(r16)                    |Store Elevation +1 (S-Pad 0x180)
00174d8c: 00021400 sll r2,r2,0x10                       |
00174d90: 00021403 sra r2,r2,0x10                       |
00174d94: 28420002 slti r2,r2,0x0002                    |
00174d98: 1440ffac bne r2,r0,0x00174c4c             Λ Loop 2 Times
00174d9c: 00000000 nop                                  |
00174da0: 92220006 lbu r2,0x0006(r17)               |Load Acting Unit's Move
00174da4: 26520001 addiu r18,r18,0x0001             |Counter +1
00174da8: 0242102a slt r2,r18,r2                    |
00174dac: 1440ffa1 bne r2,r0,0x00174c34         Λ Loop While Counter < Acting unit Move
00174db0: 00000000 nop                              |
00174db4: 0c05d4a2 jal 0x00175288           |-->Set_Reachable_Tile_Flag
00174db8: 00000000 nop                      |
00174dbc: 34030001 ori r3,r0,0x0001         |
00174dc0: 3c018019 lui r1,0x8019            |
00174dc4: ac23f510 sw r3,-0x0af0(r1)        |Store 0x01 at [ 8018f510 ]        0x8018f510
00174dc8: 9223000d lbu r3,0x000d(r17)       |Load Active Unit ID (S-Pad 0x000)
00174dcc: 86020018 lh r2,0x0018(r16)        |Reachable Tiles counter
00174dd0: 3c018019 lui r1,0x8019            |
00174dd4: ac23f514 sw r3,-0x0aec(r1)        |Store Active Unit ID at [ 8018f514 ]        0x8018f514
00174dd8: 8fbf0028 lw r31,0x0028(r29)       END
00174ddc: 8fb30024 lw r19,0x0024(r29)
00174de0: 8fb20020 lw r18,0x0020(r29)
00174de4: 8fb1001c lw r17,0x001c(r29)
00174de8: 8fb00018 lw r16,0x0018(r29)
00174dec: 27bd0030 addiu r29,r29,0x0030
00174df0: 03e00008 jr r31
00174df4: 00000000 nop

Return Location

BATTLE.BIN
00071628: 000715e8_-_00071664
000718e4: 0007187c_-_00071928
00194b68: AI_movement/panel_data_setting