Difference between revisions of "Fix the EHZ Deformation bug"
From Sonic Retro
(Created page with '{{GuideBy|qiuu}} In Sonic 2 is in EHZ a small deformation bug, the lowest two layers don't scroll as they are not affected by the deformation code: [[File:S2-EHZ-Deform-Bug…') |
(Fixing placement of added lines) |
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<asm> move.w #($B4)/12-1,d1 ; $B4 bytes | <asm> move.w #($B4)/12-1,d1 ; $B4 bytes | ||
- move.w d4,(a1)+ | - move.w d4,(a1)+ | ||
| − | |||
| − | |||
| − | |||
| − | |||
move.w d3,(a1)+ | move.w d3,(a1)+ | ||
move.w d4,(a1)+ | move.w d4,(a1)+ | ||
| Line 43: | Line 39: | ||
swap d3 | swap d3 | ||
dbf d1,- | dbf d1,- | ||
| + | move.w d4,(a1)+ | ||
| + | move.w d3,(a1)+ | ||
| + | move.w d4,(a1)+ | ||
| + | move.w d3,(a1)+ | ||
rts</asm> | rts</asm> | ||
Revision as of 11:17, 26 May 2010
(Original guide by qiuu)
In Sonic 2 is in EHZ a small deformation bug, the lowest two layers don't scroll as they are not affected by the deformation code:
To fix this, go to SwScrl_EHZ:. Scroll down until you see SwScrl_RippleData:. Above it you should have this piece of code:
<asm> move.w #($B4)/12-1,d1 ; $B4 bytes
- move.w d4,(a1)+
move.w d3,(a1)+
move.w d4,(a1)+
move.w d3,(a1)+
move.w d4,(a1)+
move.w d3,(a1)+
swap d3
add.l d0,d3
add.l d0,d3
add.l d0,d3
swap d3
dbf d1,-
rts</asm> Copy and paste this code twice into it: <asm> move.w d4,(a1)+ move.w d3,(a1)+</asm> In the end it should look like this: <asm> move.w #($B4)/12-1,d1 ; $B4 bytes - move.w d4,(a1)+ move.w d3,(a1)+ move.w d4,(a1)+ move.w d3,(a1)+ move.w d4,(a1)+ move.w d3,(a1)+ swap d3 add.l d0,d3 add.l d0,d3 add.l d0,d3 swap d3 dbf d1,- move.w d4,(a1)+ move.w d3,(a1)+ move.w d4,(a1)+ move.w d3,(a1)+
rts</asm>
And that's it! Now it should look fixed:
