Difference between revisions of "001af3a4 - 001af3d8"
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(Created page with " Little math routine dedicated to arcing weapon trajectory '''Parameters''' : r4 = (Attacker to target distance)*4096 = [AT distance]*4096 '''Returns''' : r2 = ([AT dist...") |
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'''Parameters''' : r4 = (Attacker to target distance)*4096 = [AT distance]*4096 | '''Parameters''' : r4 = (Attacker to target distance)*4096 = [AT distance]*4096 | ||
| − | '''Returns''' : r2 = ([AT distance]² *4096/336) | + | '''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>}} | 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>}} | 001af3a8: 00840018 mult r4,r4 |{{f/std|<nowiki> ([AT distance]*64)^2</nowiki>}} | ||
001af3ac: 3c03801c lui r3,0x801c |{{f/std|<nowiki>r3 = 0x801c0000</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</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>}} | 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>}} | 001af3b8: 000322c3 sra r4,r3,0x0b |{{f/std|<nowiki>r4 = 0xa8000 / 2048 = 12*28</nowiki>}} | ||
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001af3d0: 00031843 sra r3,r3,0x01 |{{f/std|<nowiki>r2 = gravity mod / 2 (0x54000)</nowiki>}} | 001af3d0: 00031843 sra r3,r3,0x01 |{{f/std|<nowiki>r2 = gravity mod / 2 (0x54000)</nowiki>}} | ||
001af3d4: 03e00008 jr r31 | | 001af3d4: 03e00008 jr r31 | | ||
| − | 001af3d8: 00621023 subu r2,r3,r2 |r2 = ([AT distance]² *4096/336) | + | 001af3d8: 00621023 subu r2,r3,r2 |r2 = 0x54000 - ([AT distance]² *4096/336) = ([AT distance]² *12 ?) a height ? |
=== Wiki Search flag === | === Wiki Search flag === | ||
uses 0x801b8878 flagged as gravity mod ( 801b8878 ) | uses 0x801b8878 flagged as gravity mod ( 801b8878 ) | ||
=== Return location === | === Return location === | ||
'''Battle.bin''' | '''Battle.bin''' | ||
| − | 001af434: | + | 001af434: [[Maths_For_Arcing_Trajectory]] |
| + | |||
'''SCUS''' | '''SCUS''' | ||
None | None | ||
Latest revision as of 22:19, 28 January 2022
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) ------------------------------------------------------------------------------------------- 001af3a4: 00042183 sra r4,r4,0x06 |r4 = [AT distance]*64 001af3a8: 00840018 mult r4,r4 | ([AT distance]*64)^2 001af3ac: 3c03801c lui r3,0x801c |r3 = 0x801c0000 001af3b0: 8c638878 lw r3,-0x7788(r3) |r3 = gravity mod ? 0xa8000 (12*28*2048) Higher value send arrow in the sky, but less far 001af3b4: 00001012 mflo r2 |r2 = [AT distance]² * 4096 001af3b8: 000322c3 sra r4,r3,0x0b |r4 = 0xa8000 / 2048 = 12*28 001af3bc: 00000000 nop | 001af3c0: 0044001a div r2,r4 |[AT distance]²* 4096 / 336 001af3c4: 00001012 mflo r2 |r2 = [AT distance]² * 4096 / 336 001af3c8: 000327c2 srl r4,r3,0x1f |r4 = r3/ 2^31 = 0x00 001af3cc: 00641821 addu r3,r3,r4 |r3 = gravity mod + 0x00 001af3d0: 00031843 sra r3,r3,0x01 |r2 = gravity mod / 2 (0x54000) 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
