Difference between revisions of "Calculate Height Difference Between Units"

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(Created page with " 0019b6b0: 90a20048 lbu r2,0x0048(r5) Load Target's Y 0019b6b4: 3c06801a lui r6,0x801a 0019b6b8: 90c601fe lbu r6,0x01fe(r6) Load Map Max X 0019b6bc: 00000000 nop 0019b6...")
 
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BATTLE.BIN : Calculate Height Difference Between Units
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  0019b6b0: 90a20048 lbu r2,0x0048(r5) Load Target's Y
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------------------------------------------------------------------------------------------
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  0019b6b4: 3c06801a lui r6,0x801a
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Parameters : r4 = Acting unit data pointer
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  0019b6b8: 90c601fe lbu r6,0x01fe(r6) Load Map Max X
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              r5 = Target Unit data pointer
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  0019b6bc: 00000000 nop
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  0019b6c0: 00460018 mult r2,r6 TY * Max X
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Returns : r2 = (Target Height - Acting unit Height)/2 - down rounded
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  0019b6c4: 00003812 mflo r7
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  0019b6c8: 90830002 lbu r3,0x0002(r4) Load Acting Unit's Y
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-----------------------------------------------------------------------------------------
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  0019b6cc: 94a20048 lhu r2,0x0048(r5) Load Target's Y + Map Level
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  0019b6b0: 90a20048 lbu r2,0x0048(r5)       |{{f/load|Load Target's Y}}
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  0019b6d0: 00660018 mult r3,r6 AY * Max X
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  0019b6b4: 3c06801a lui r6,0x801a           |
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  0019b6d4: 000213c2 srl r2,r2,0x0f r2 = Map Level
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  0019b6b8: 90c601fe lbu r6,0x01fe(r6)       |{{f/load|Load Map Max X (AI data)}} {{f/load|801a01fe}}
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  0019b6d8: 00021200 sll r2,r2,0x08 Map Level * 256
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  0019b6bc: 00000000 nop                     |
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  0019b6dc: 00471021 addu r2,r2,r7 TY * Max X + Map Level * 256
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  0019b6c0: 00460018 mult r2,r6               |
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  0019b6e0: 90a30047 lbu r3,0x0047(r5) Load Target's X
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  0019b6c4: 00003812 mflo r7                 |{{f/std|Target Y * Max X}}
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  0019b6e4: 3c058019 lui r5,0x8019
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  0019b6c8: 90830002 lbu r3,0x0002(r4)       |{{f/load|Load Acting Unit's Y}}
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  0019b6e8: 24a5f8cc addiu r5,r5,0xf8cc
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  0019b6cc: 94a20048 lhu r2,0x0048(r5)       |{{f/load|Load Target's Y + Map Level}}
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  0019b6ec: 00431021 addu r2,r2,r3 Tile ID = TY * Max X + Map Level * 256 + TX
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  0019b6d0: 00660018 mult r3,r6               |
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  0019b6f0: 000210c0 sll r2,r2,0x03 ID * 8
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  0019b6d4: 000213c2 srl r2,r2,0x0f           |{{f/std|Elevation flag}}
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  0019b6f4: 00453021 addu r6,r2,r5 r6 = Target's Tile ID
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  0019b6d8: 00021200 sll r2,r2,0x08           |{{f/std|Elevation * 256 (Offset of elevated tiles)}}
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  0019b6f8: 90830001 lbu r3,0x0001(r4) Load Acting Unit's Map Level
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  0019b6dc: 00471021 addu r2,r2,r7           |{{f/std|TY * Max X + Map Level * 256}}
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  0019b6fc: 90840000 lbu r4,0x0000(r4) Load Acting Unit's X
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  0019b6e0: 90a30047 lbu r3,0x0047(r5)       |{{f/load|Load Target's X}}
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  0019b700: 00031a00 sll r3,r3,0x08 Map Level * 256
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  0019b6e4: 3c058019 lui r5,0x8019           |
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  0019b704: 00001012 mflo r2
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  0019b6e8: 24a5f8cc addiu r5,r5,-0x0734      |{{f/load|Start of Tiles data pointer}} {{f/std| 8018f8cc}}
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  0019b708: 00621821 addu r3,r3,r2 AY * Max X + Map Level * 256
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  0019b6ec: 00431021 addu r2,r2,r3           |{{f/std|Tile ID }} {{f/std| (Y coord * Max X) + X coord + (Elevation * 100)}}
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  0019b70c: 00641821 addu r3,r3,r4 Tile ID = AY * Max X + Map Level * 256 + AX
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  0019b6f0: 000210c0 sll r2,r2,0x03           |{{f/std|Tile ID * 8 (offset in Tiles data)}}
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  0019b710: 000318c0 sll r3,r3,0x03 ID * 8
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  0019b6f4: 00453021 addu r6,r2,r5           |{{f/adr|Target's Tile data pointer}}
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  0019b714: 90c20002 lbu r2,0x0002(r6) Load Target's Tile Height
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  0019b6f8: 90830001 lbu r3,0x0001(r4)       |{{f/load|Load Acting Unit's Elevation}}
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  0019b718: 90c40003 lbu r4,0x0003(r6) Load Target's Tile Halves + Depth
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  0019b6fc: 90840000 lbu r4,0x0000(r4)       |{{f/load|Load Acting Unit's X}}
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  0019b71c: 00653021 addu r6,r3,r5 r6 = Acting Unit's Tile ID
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  0019b700: 00031a00 sll r3,r3,0x08           |
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  0019b720: 90c30003 lbu r3,0x0003(r6) Load Acting Unit's Tile Halves + Depth
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  0019b704: 00001012 mflo r2                 |{{f/std|Acting Unit Y* Max X}}
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  0019b724: 00021040 sll r2,r2,0x01 THeight * 2
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  0019b708: 00621821 addu r3,r3,r2           |
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  0019b728: 3084001f andi r4,r4,0x001f r4 = THalves
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  0019b70c: 00641821 addu r3,r3,r4           |{{f/std|Acting unit tile ID}} {{f/std| (Y coord * Max X) + X coord + (Elevation * 100)}}
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  0019b72c: 00441021 addu r2,r2,r4 TTotal Height = THeight * 2 + THalves
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  0019b710: 000318c0 sll r3,r3,0x03           |{{f/std|ID * 8}}
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  0019b730: 90c40002 lbu r4,0x0002(r6) Load Acting Unit's Tile Height
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  0019b714: 90c20002 lbu r2,0x0002(r6)       |{{f/load|Load Target's Tile Height}}
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  0019b734: 3063001f andi r3,r3,0x001f r3 = AHalves
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  0019b718: 90c40003 lbu r4,0x0003(r6)       |{{f/load|Load Target's Tile Halves + Depth}}
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  0019b738: 00042040 sll r4,r4,0x01 AHeight * 2
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  0019b71c: 00653021 addu r6,r3,r5           |{{f/adr|<nowiki>r6 = Acting Unit's Tile data pointer</nowiki>}}
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  0019b73c: 00832021 addu r4,r4,r3 ATotal Height = AHeight * 2 + AHalves
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  0019b720: 90c30003 lbu r3,0x0003(r6)       |{{f/load|Load Acting Unit's Tile Halves + Depth}}
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  0019b740: 00441023 subu r2,r2,r4 Height Difference = TTotal Height - ATotal Height
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  0019b724: 00021040 sll r2,r2,0x01           |{{f/std|Target Height * 2}}
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  0019b744: 00021fc2 srl r3,r2,0x1f
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  0019b728: 3084001f andi r4,r4,0x001f       |{{f/std|Target Halves only}}
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  0019b748: 00431021 addu r2,r2,r3
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  0019b72c: 00441021 addu r2,r2,r4           |{{f/std|Target Total Height }} {{f/std| Height * 2 + Halves}}
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  0019b74c: 03e00008 jr r31
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  0019b730: 90c40002 lbu r4,0x0002(r6)       |{{f/load|Load Acting Unit's Tile Height}}
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  0019b750: 00021043 sra r2,r2,0x01 Height Difference / 2
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  0019b734: 3063001f andi r3,r3,0x001f       |{{f/std|Actor Halves }}
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  0019b738: 00042040 sll r4,r4,0x01           |{{f/std|Actor height * 2}}
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  0019b73c: 00832021 addu r4,r4,r3           |{{f/std|Actor total height}}
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  0019b740: 00441023 subu r2,r2,r4           |{{f/std|Delta Height}}
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  0019b744: 00021fc2 srl r3,r2,0x1f           |{{f/std|1 if negative value}}
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  0019b748: 00431021 addu r2,r2,r3           |{{f/std|Add 1 if Target is below Actor --> delta height is rounded down in all cases}}
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  0019b74c: 03e00008 jr r31                   |
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  0019b750: 00021043 sra r2,r2,0x01           |{{f/std|Height Difference / 2}}
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===Return Locations===
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'''BATTLE.BIN'''
 +
00199280: [[Calculate_Physical%3F_Target]]
 +
0019b660: [[AI_Depth_Elemental_Monster_Skill_Use_Check_(0019b4f4)]]

Latest revision as of 12:48, 6 May 2023

BATTLE.BIN : Calculate Height Difference Between Units
------------------------------------------------------------------------------------------
Parameters : r4 = Acting unit data pointer
             r5 = Target Unit data pointer 
			  
Returns : r2 = (Target Height - Acting unit Height)/2 - down rounded
  
-----------------------------------------------------------------------------------------
0019b6b0: 90a20048 lbu r2,0x0048(r5)        |Load Target's Y
0019b6b4: 3c06801a lui r6,0x801a            |
0019b6b8: 90c601fe lbu r6,0x01fe(r6)        |Load Map Max X (AI data) 801a01fe
0019b6bc: 00000000 nop                      |
0019b6c0: 00460018 mult r2,r6               |
0019b6c4: 00003812 mflo r7                  |Target Y * Max X
0019b6c8: 90830002 lbu r3,0x0002(r4)        |Load Acting Unit's Y
0019b6cc: 94a20048 lhu r2,0x0048(r5)        |Load Target's Y + Map Level
0019b6d0: 00660018 mult r3,r6               |
0019b6d4: 000213c2 srl r2,r2,0x0f           |Elevation flag
0019b6d8: 00021200 sll r2,r2,0x08           |Elevation * 256 (Offset of elevated tiles)
0019b6dc: 00471021 addu r2,r2,r7            |TY * Max X + Map Level * 256
0019b6e0: 90a30047 lbu r3,0x0047(r5)        |Load Target's X
0019b6e4: 3c058019 lui r5,0x8019            |
0019b6e8: 24a5f8cc addiu r5,r5,-0x0734      |Start of Tiles data pointer  8018f8cc
0019b6ec: 00431021 addu r2,r2,r3            |Tile ID   (Y coord * Max X) + X coord + (Elevation * 100)
0019b6f0: 000210c0 sll r2,r2,0x03           |Tile ID * 8 (offset in Tiles data)
0019b6f4: 00453021 addu r6,r2,r5            |Target's Tile data pointer
0019b6f8: 90830001 lbu r3,0x0001(r4)        |Load Acting Unit's Elevation
0019b6fc: 90840000 lbu r4,0x0000(r4)        |Load Acting Unit's X
0019b700: 00031a00 sll r3,r3,0x08           |
0019b704: 00001012 mflo r2                  |Acting Unit Y* Max X
0019b708: 00621821 addu r3,r3,r2            |
0019b70c: 00641821 addu r3,r3,r4            |Acting unit tile ID  (Y coord * Max X) + X coord + (Elevation * 100)
0019b710: 000318c0 sll r3,r3,0x03           |ID * 8
0019b714: 90c20002 lbu r2,0x0002(r6)        |Load Target's Tile Height
0019b718: 90c40003 lbu r4,0x0003(r6)        |Load Target's Tile Halves + Depth
0019b71c: 00653021 addu r6,r3,r5            |r6 = Acting Unit's Tile data pointer
0019b720: 90c30003 lbu r3,0x0003(r6)        |Load Acting Unit's Tile Halves + Depth
0019b724: 00021040 sll r2,r2,0x01           |Target Height * 2
0019b728: 3084001f andi r4,r4,0x001f        |Target Halves only
0019b72c: 00441021 addu r2,r2,r4            |Target Total Height   Height * 2 + Halves
0019b730: 90c40002 lbu r4,0x0002(r6)        |Load Acting Unit's Tile Height
0019b734: 3063001f andi r3,r3,0x001f        |Actor Halves 
0019b738: 00042040 sll r4,r4,0x01           |Actor height * 2
0019b73c: 00832021 addu r4,r4,r3            |Actor total height
0019b740: 00441023 subu r2,r2,r4            |Delta Height
0019b744: 00021fc2 srl r3,r2,0x1f           |1 if negative value
0019b748: 00431021 addu r2,r2,r3            |Add 1 if Target is below Actor --> delta height is rounded down in all cases
0019b74c: 03e00008 jr r31                   |
0019b750: 00021043 sra r2,r2,0x01           |Height Difference / 2

Return Locations

BATTLE.BIN
00199280: Calculate_Physical?_Target
0019b660: AI_Depth_Elemental_Monster_Skill_Use_Check_(0019b4f4)
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