Difference between revisions of "Add a Homing Attack in Sonic 3 and Knuckles"
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| + | {{GuideBy|Sonic Pro1}} | ||
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| + | by the way this is a semi-homing attack (Air Dash) | ||
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'''''I recommend context''''' | '''''I recommend context''''' | ||
| − | well you should go to sonic3k.asm | + | '''well you should go to sonic3k.asm''' |
| + | |||
| + | |||
[[File:Exemple-1-to-homing-attack.PNG]] | [[File:Exemple-1-to-homing-attack.PNG]] | ||
| − | then go to ; loc_119F6: Sonic_InstaShield: | + | '''then go to ; loc_119F6: Sonic_InstaShield:''' |
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| + | '''and replace that for this''' | ||
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| + | |||
| + | ;loc_119F6: | ||
| + | Sonic_InstaShield: | ||
| + | btst #Status_Shield,status_secondary(a0) ; does Sonic have an S2 shield (The Elementals were already filtered out at this point)? | ||
| + | bne.w locret_11A14 ; if yes, branch | ||
| + | btst #Status_FireShield,status_secondary(a0) ; does Sonic have a Homing Attack? | ||
| + | move.b #0,(Shield+anim).w | ||
| + | move.b #1,double_jump_flag(a0) | ||
| + | move.w $650.d0 | ||
| + | btst #Status_Facing,status(a0) ; is Sonic facing left? | ||
| + | beq.s loc_11958 ; if not, branch | ||
| + | neg.w d0 ; reverse speed value, moving Sonic left | ||
| + | |||
| + | loc_11958: | ||
| + | |||
| + | move.w d0,x_vel(a0) ; apply velocity... | ||
| + | move.w d0,ground_vel(a0) ; ... both ground and air | ||
| + | move.w #0.y_vel(a0) ; kill y-velocity | ||
| + | move.w .$2000,(H_scroll_frame_offset).w | ||
| + | bsr.w Reset_Player_Position_Array | ||
| + | move.w '-$4A,d0; play homing-attack sound | ||
| + | jmp (Play_Sound_2).l | ||
| + | |||
| + | |||
| + | '''And go higher where this is:''' | ||
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| + | |||
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| + | loc_1192C: | ||
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| + | Sonic_FireShield: | ||
| + | |||
| + | |||
| + | '''and replace that with this:''' | ||
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| + | |||
| + | ; loc_1192C: | ||
| + | |||
| + | Sonic_FireShield: | ||
| + | |||
| + | btst #Status_Invincible,status_secondary(a0) ; first, does Sonic have invincibility? | ||
| + | bne.w locret_11A14 ; if yes, branch | ||
| + | btst #Status_FireShield,status_secondary(a0) ; does Sonic have a Fire Shield? | ||
| + | beq.s Sonic_LightningShield ; if not, branch | ||
| + | move.b #1,(Shield+anim).w | ||
| + | move.b #1,double_jump_flag(a0) | ||
| + | move.w #$800,d0 | ||
| + | btst #Status_Facing,status(a0) ; is Sonic facing left? | ||
| + | beq.s loc_8CB09 ; if not, branch | ||
| + | neg.w d0 ; reverse speed value, moving Sonic left | ||
| + | |||
| + | loc_8CB09: | ||
| + | |||
| + | move.w d0,x_vel(a0) ; apply velocity... | ||
| + | move.w d0,ground_vel(a0) ; ...both ground and air | ||
| + | move.w #0,y_vel(a0) ; kill y-velocity | ||
| + | move.w #$2000,(H_scroll_frame_offset).w | ||
| + | bsr.w Reset_Player_Position_Array | ||
| + | move.w #$43,d0 ; play Fire Shield attack sound | ||
| + | jmp (Play_Sound_2).l | ||
| + | |||
| + | |||
| + | |||
| + | |||
| + | '''ready you already have a semi-homing attack in sonic 3 I hope you have fun and that you are happy''' | ||
| + | [[Category:SCHG How-tos (Sonic the Hedgehog 3 & Knuckles)]] | ||
Latest revision as of 15:15, 3 May 2021
(Original guide by Sonic Pro1)
by the way this is a semi-homing attack (Air Dash)
first you must have a code editor and the dissambly: sonic 3 & knuckles
I recommend context
well you should go to sonic3k.asm
then go to ; loc_119F6: Sonic_InstaShield:
and replace that for this
- loc_119F6
Sonic_InstaShield:
btst #Status_Shield,status_secondary(a0) ; does Sonic have an S2 shield (The Elementals were already filtered out at this point)?
bne.w locret_11A14 ; if yes, branch
btst #Status_FireShield,status_secondary(a0) ; does Sonic have a Homing Attack?
move.b #0,(Shield+anim).w
move.b #1,double_jump_flag(a0)
move.w $650.d0
btst #Status_Facing,status(a0) ; is Sonic facing left?
beq.s loc_11958 ; if not, branch
neg.w d0 ; reverse speed value, moving Sonic left
loc_11958:
move.w d0,x_vel(a0) ; apply velocity...
move.w d0,ground_vel(a0) ; ... both ground and air
move.w #0.y_vel(a0) ; kill y-velocity
move.w .$2000,(H_scroll_frame_offset).w
bsr.w Reset_Player_Position_Array
move.w '-$4A,d0; play homing-attack sound
jmp (Play_Sound_2).l
And go higher where this is:
loc_1192C:
Sonic_FireShield:
and replace that with this:
- loc_1192C
Sonic_FireShield:
btst #Status_Invincible,status_secondary(a0) ; first, does Sonic have invincibility?
bne.w locret_11A14 ; if yes, branch
btst #Status_FireShield,status_secondary(a0) ; does Sonic have a Fire Shield?
beq.s Sonic_LightningShield ; if not, branch
move.b #1,(Shield+anim).w
move.b #1,double_jump_flag(a0)
move.w #$800,d0
btst #Status_Facing,status(a0) ; is Sonic facing left?
beq.s loc_8CB09 ; if not, branch
neg.w d0 ; reverse speed value, moving Sonic left
loc_8CB09:
move.w d0,x_vel(a0) ; apply velocity...
move.w d0,ground_vel(a0) ; ...both ground and air
move.w #0,y_vel(a0) ; kill y-velocity
move.w #$2000,(H_scroll_frame_offset).w
bsr.w Reset_Player_Position_Array
move.w #$43,d0 ; play Fire Shield attack sound
jmp (Play_Sound_2).l
ready you already have a semi-homing attack in sonic 3 I hope you have fun and that you are happy