View source for 001af3a4 - 001af3d8

 Little math routine dedicated to arcing weapon trajectory
 
 '''Parameters''' : r4 = (Attacker to target distance)*4096 = [AT distance]*4096
 
 '''Returns''' : r2 = 0x54000 - ([AT distance]² *4096/336)
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 001af3a4: 00042183 sra r4,r4,0x06           |{{f/std|<nowiki>r4 = [AT distance]*64</nowiki>}}
 001af3a8: 00840018 mult r4,r4               |{{f/std|<nowiki> ([AT distance]*64)^2</nowiki>}}
 001af3ac: 3c03801c lui r3,0x801c            |{{f/std|<nowiki>r3 = 0x801c0000</nowiki>}}
 001af3b0: 8c638878 lw r3,-0x7788(r3)        |{{f/load|<nowiki>r3 = gravity mod ? 0xa8000 (12*28*2048)</nowiki>}} {{f/std|<nowiki>Higher value send arrow in the sky, but less far</nowiki>}}
 001af3b4: 00001012 mflo r2                  |{{f/std|<nowiki>r2 = [AT distance]² * 4096</nowiki>}}
 001af3b8: 000322c3 sra r4,r3,0x0b           |{{f/std|<nowiki>r4 = 0xa8000 / 2048 = 12*28</nowiki>}}
 001af3bc: 00000000 nop                      |
 001af3c0: 0044001a div r2,r4                |{{f/std|<nowiki>[AT distance]²* 4096 / 336</nowiki>}}
 001af3c4: 00001012 mflo r2                  |{{f/std|<nowiki>r2 = [AT distance]²  * 4096 / 336</nowiki>}}
 001af3c8: 000327c2 srl r4,r3,0x1f           |{{f/std|<nowiki>r4 = r3/ 2^31 = 0x00</nowiki>}}
 001af3cc: 00641821 addu r3,r3,r4            |{{f/std|<nowiki>r3 = gravity mod + 0x00</nowiki>}}
 001af3d0: 00031843 sra r3,r3,0x01           |{{f/std|<nowiki>r2 = gravity mod / 2 (0x54000)</nowiki>}}
 001af3d4: 03e00008 jr r31                   |
 001af3d8: 00621023 subu r2,r3,r2            |r2 = 0x54000 - ([AT distance]² *4096/336) = ([AT distance]² *12 ?) a height ?
=== Wiki Search flag ===
 uses 0x801b8878 flagged as gravity mod  ( 801b8878 )
=== Return location ===
 '''Battle.bin'''
 001af434: [[Maths_For_Arcing_Trajectory]]
 
 '''SCUS'''
 None