Layer 3 not visible - ASM & Related Topics

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Layer 3 not visible

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allowiscous

MARIO SUPER DEMO RELEASED

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Posted on 2017-05-27 04:46:16 PM

Hello, I have an issue with color math, layer 3, and layer 2.

Code

	LDA #$01
	STA $3E

	LDA #$22
	STA $44

	LDA #$15
	STA $212C
	LDA #$02
	STA $212D

	LDA.b #$B5
	STA $40

This code is in place in order to create a layer 2 spotlight, giving this effect. However, layer three does not show in the BG, and instead looks, with layer 2 disabled, like this. I believe this may be indicative of a larger problem, and related to this patch which creates a layer three status bar.

Here's a patch of the ROM so you can see what it looks like. Just enter the level then the door in order to get to the sublevel.

Thanks for the read, any and all help woll be appreciated.

Medic
Mettaton EX

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Posted on 2017-05-27 05:26:53 PM

If you set $40 to #$B1, rather than #$B5 it will show up.

allowiscous

MARIO SUPER DEMO RELEASED

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Posted on 2017-05-27 05:33:02 PM

Originally posted by Medic

If you set $40 to #$B1, rather than #$B5 it will show up.

Nope, that does nothing.

Medic
Mettaton EX

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Posted on 2017-05-27 05:38:21 PM | Last edited 2017-05-27 05:42:09 PM by Medic

It most certainly does, look closer... the layer is there, just not very visible. Although I am unsure of what effect you are going for, so... if you could describe or make a picture of what the layer 3 background is supposed to look like, that would be helpful.

allowiscous

MARIO SUPER DEMO RELEASED

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Posted on 2017-05-27 06:57:11 PM

See how layer 2 appears, ah, normal in this video? Like that. Yaknow, visible behind the spotlight with all it's colors and everything affected by the color math.

Medic
Mettaton EX

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Posted on 2017-05-27 07:44:33 PM | Last edited 2017-05-27 07:46:46 PM by Medic

Okay got it and you should realize you are trying to write to regs outside a blank which for many regs including the main/subscreen designations you cannot do (assuming this is in levelasm) so you need to use SMW's mirrors instead which would make your code:

Code

LDA #$15
STA $0D9D
LDA #$02
STA $0D9E
LDA.b #$C5
STA $40
RTS

(i dont think you need to mess with $3E or $44)

Maybe some sprites will not entirely work with this but I believe that can be worked around.

allowiscous

MARIO SUPER DEMO RELEASED

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Posted on 2017-05-27 11:22:48 PM | Last edited 2017-05-27 11:24:17 PM by allowiscous

Cool, that works as intended. Thanks!

Medic
Mettaton EX

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Posted on 2017-05-27 11:31:03 PM | Last edited 2017-05-27 11:34:12 PM by Medic

Color math and sprites work not quite as expected on the SNES. It only functions on sprites that use palette C, D, E or F. There is a different way to do it but it would affect Mario too and I tried it and it made him black so you probably don't want that one. Replace #$C5 with #$D5 (enable translucency on sprites). Any sprite that uses palette 8,9,A,B will not be affected and show up normally, while C,D,E,F will be affected (so you might need to insert some edited stuff for this).

(smh ninja'd by an edit?? i'm leaving this up in case the reason you edited that out wasn't because you figured it out already)

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