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| Tip: Try sketching out ideas for overworlds and levels. Even if they don't manage to fit into Lunar Magic completely, at least you have a base to work from, instead of doing it all from scratch. |
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| ? Ball Question |
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Forum Index - SMW Hacking - General SMW Hacking Help - ? Ball Question |
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Pages:  1  |
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| Posted on 2012-03-02 08:54:39 AM |
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Why exactly is the green ? Ball backwards in the GFX file?
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| Posted on 2012-03-02 09:13:01 AM |
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It's most likely related to shared sprite GFX routines. The entire code of the goal sphere sprite is this:
CodeGoalSphere: 20 0D 9F JSR.W SubSprGfx2Entry1
CODE_018766: A5 9D LDA RAM_SpritesLocked ; \ Branch if sprites locked
CODE_018768: D0 1E BNE Return018788 ; /
CODE_01876A: A5 13 LDA RAM_FrameCounter
CODE_01876C: 29 1F AND.B #$1F
CODE_01876E: 05 9D ORA RAM_SpritesLocked
CODE_018770: 20 52 B1 JSR.W CODE_01B152
CODE_018773: 20 E4 A7 JSR.W MarioSprInteractRt
CODE_018776: 90 10 BCC Return018788
CODE_018778: 9E C8 14 STZ.W $14C8,X
CODE_01877B: A9 FF LDA.B #$FF
CODE_01877D: 8D 93 14 STA.W $1493
CODE_018780: 8D DA 0D STA.W $0DDA
CODE_018783: A9 0B LDA.B #$0B
CODE_018785: 8D FB 1D STA.W $1DFB ; / Change music
Return018788: 60 RTS ; Return
Normally, sprite tiles get X-flipped when the sprite is facing right, but right will be the default direction for them if the direction is never set. The goal sphere doesn't do anything related to the graphics other than call a shared GFX routine (SubSprGfx2Entry1), and it never sets its direction because it doesn't need to, so it is automatically always "facing" right, so the shared GFX routine flips the tile it uses. If you wanted to change this, the best way might be to make the sprite's init routine set its direction to left so that the tile doesn't get flipped (or just use a custom sprite). Assuming that you are a) using a headered ROM and b) not using Tessera, a patch to do that might look like this:
Codeheader
lorom
org $018211
dw NewGoalSphereInitRt
org $01CD27
NewGoalSphereInitRt:
INC $157C,x
RTS
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| Posted on 2012-03-02 09:20:51 AM |
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My brain hurts.
Actually, it doesn't matter. I was just curious, and was wondering if I was doing anything wrong by SMB3-ing it and also making it backwards.
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| Last edited on 2012-03-02 09:21:06 AM by Roads1. |
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| Posted on 2012-03-02 01:19:37 PM |
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That isn't the only sprite flipped backwards; the feather, mushroom, piranha plant, info box, key, and Yoshi's egg are backwards as well, and there's probably a lot more.
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Forum Index - SMW Hacking - General SMW Hacking Help - ? Ball Question |
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