SMB Castle path-choice effect

Submission Details

Name:	SMB Castle path-choice effect
Author:	BTD6_maker
Added:	2020-09-06 07:16:21 AM
Type:	Init, Main
Includes Hijack:	No
Featured:	No
Description:	This code allows you to create a level with multiple paths, where the correct path must be chosen to progress, similar to 4-4 and 7-4 from SMB. You can define several rectangles, and then if Yoshi reaches a particular x-position without entering any of these rectangles all horizontal entrances towards right (sprite 0D0) will despawn. For instance, this can be used to despawn an entrance that sends you back to the start, if you have chosen the correct path, thus allowing you to continue.
Tags:	sprites
Comments:	9 (jump to comments)
Rating:	0.0 (0 ratings) No rating

Download 1.74 KiB | 220 downloads

Comments (9)

rivaldorivero 2022-01-17 10:12:35 AM Link

Hi, please help someone, insert this code into the game and download the rom.. I have no knowledge of programming. Thank you in advance.

HammerBrother 2020-11-30 01:36:22 AM Link

Code

;This has a list of all coordinates of the rectangles where this will trigger.

LEFTEDGE:
dw $00D0,$00D0,$0210,$0210
RIGHTEDGE:
dw $00F0,$00F0,$0230,$0230
TOPEDGE:
dw $0720,$07A0,$0760,$07A0
BOTTOMEDGE:
dw $0760,$07E0,$07A0,$07E0

!length = #$07			;Replace with actual length of tables, in bytes
...
	.YCheck
	INY
	INY
	SEP #$20
	TYA
	CMP !length
	BCS .AreaReturn

Uh, you utilize label maths to avoid having the user manually entering the length of tables:

Code

CMP #(RIGHTEDGE-LEFTEDGE)-1

BTD6_maker Author 2020-09-06 06:48:00 PM Link

Thanks for that. When I get the chance I will see if I can make those improvements.

MarioFanGamer 2020-09-06 07:27:17 AM Link

Moderated with:

Golden Egg 0.005
Asar v1.71
BSNES v115

Replaced a single instance of $7F0000 in the code with !flag (apperantelly, you forgot this one).

It works... but it could have been more user friendly. For example, I'd specify each box for the wrong path on a single line. I'd also make use of Asar maths so you don't have to specify the entries. You also could have made it so to disable sprite 147 (horizontal entrance to the left).

I also see ways of improvement. One example I can think of is the constant switching between 16-bit and 8-bit mode. I can understand it if you set the flag that the wrong path has been taken but if you compare it, you can just clear the high byte with AND #$00FF. Another example is that you don't use the SRAM mirrors $6000-$7FFF beyond the use of the sprite table $7360,x.

Nonetheless, it is a way to disable horizontal warps depending on Yoshi / the player's path so accepted.

Batata Douce 2020-06-02 11:18:26 PM Link

Originally posted by zacmario

That's awesome.. but what heck is spasm

SNES Professional ASM

parakmahonsmwc 2020-02-06 11:47:28 AM Link

This comment was written and published 8 months after this was submitted... sheesh.

zacmario 2019-04-24 01:13:52 AM Link

Ohh yeah I forgot. Thanks

MarioFanGamer 2019-04-22 08:15:27 PM Link

levelASM for Yoshi's Island.

zacmario 2019-04-22 11:37:57 AM Link

That's awesome.. but what heck is spasm