The NSMB Hacking Domain » Open ROM in emulator

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Some_Random_Guy777

Posted on 11-13-11, 05:38 am (rev. 2)

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ID: 5887
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Paragoomba

Karma: 36
Posts: 5/77
Since: 11-06-11

When you move entrences, there is an 8x8 snapping grid.

It would be good to make it so:
when you hold ALT, there would have no snapping.
when you hold SHIFT, there would have a 16x16 snap.

And maybe also, while you resize both XY on stuff. When you hold SHIFT, it will make a perfect square. (just like in paint, when you hold shift when drawing a square or cirle, it makes it perfect.)

EDIT: When you press F4, the editor will open the ROM in the emulator selected in the options.

_________________________

Freeze	Posted on 11-13-11, 01:25 pm Hi. Link ID: 5896 +0
Karma: 3752 Posts: 678/2112 Since: 06-28-11	I would prefer an option in the settings, that enables/disables snapping. Why shouldnt we like snapping? It is quite useful.

Dirbaio	Posted on 11-13-11, 01:48 pm Hi. Link ID: 5897 +0
Super Mario ( ͡° ͜ʖ ͡°) Karma: 10010 Posts: 1119/4457 Since: 06-08-11	There's a button in the toolbar that enables/disables snapping. And I personally find 16x16 snapping quite useless. Why would you want that? You can do it already with 8x8 snapping and looking at the surrounding blocks...

Some_Random_Guy777	Posted on 11-13-11, 10:35 pm Hi. Link ID: 5907 +0
Paragoomba Karma: 36 Posts: 7/77 Since: 11-06-11	I just relized that, I posted this because of the green moving blocks paths, i thought it would screw up if nodes were placed correctly, and before making a reply, i tested it, and it had no flaws. Im sorry for this. What about when you press F4, the editor will open the ROM in the emulator selected in the options? _________________________ Milk, eggs, coffee.

Dirbaio	Posted on 11-13-11, 10:58 pm Hi. Link ID: 5908 +0
Super Mario ( ͡° ͜ʖ ͡°) Karma: 10010 Posts: 1122/4457 Since: 06-08-11	Hmm not hard to do. Though I dont see the usefulness of it. Waiting for the emu to launch, mmhmhmh... Personally, I always have the emulator open, and when I want to test, I press alt+tab to select the emulator, and then F12 + Enter which reloads the ROM in No$gba. Easy and fast.

Piranhaplant	Posted on 11-13-11, 11:04 pm Hi. Link ID: 5909 +0
Fuzzy Full mod Karma: 1183 Posts: 276/785 Since: 06-28-11	For my ZAMN editor I implemented a feature that generates a save state to the current level for easy testing. Basically it just takes a pre-created save state and edits the RAM address for the current level, then launches the emulator. This could be a useful feature for NSMBe, but I don't know where the current level RAM address is Layout design by ~alder-sketch

coolas1

Posted on 11-14-11, 03:06 am

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ID: 5914
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Porcupo
Did you win the game?

Karma: 211
Posts: 162/322
Since: 06-28-11

Maybe this will help...

Posted by Dirbaio

Posted by coolas1

Dirbaio do you know the RAM memory location of the level files when nsmb loads a level?

(All offsets are on the U rom, I dont know them on the E version)

RAM:0208B168: void* pointersToBlocks[14]: contains 14 pointers to the 14 blocks of the level file.
RAM:0208B130: u32 blockSizes[14]: contains the 14 block lengths in bytes.

For the actual level, the file itself is not stored.
The file is loaded and parsed and the whole level is rendered into a tilemap.

The tilemap is divided in 16x16 blocks (the grid in the editor. Conincidence?).
Each block is given a number. Empty blocks have all the same number, so they are stored only once. Probably to save memory.
Some stuff that could be useful for you:

RAM:020B0308 @ =============== S U B R O U T I N E =======================================

RAM:020B0308

RAM:020B0308 @ PARAMS:

RAM:020B0308 @ R0: Pointer to scene?

RAM:020B0308 @ R1: X mario pos

RAM:020B0308 @ R2: Y mario pos

RAM:020B0308

RAM:020B0308 getLevelBlockNumber:                    @ CODE XREF: sub_20AE638+88p

RAM:020B0308                                         @ sub_20AF30C+D0p ...

RAM:020B0308                 LDR     R3, =pointersToBlocks

RAM:020B030C                 LDR     R3, [R3]

RAM:020B0310                 LDRH    R3, [R3,#2]

RAM:020B0314                 AND     R3, R3, #0x20

RAM:020B0318                 ANDS    R3, R3, #0xFF

RAM:020B031C                 ADDNE   R3, R0, #0x400  @ If level wraps

RAM:020B0320                 LDRHNE  R3, [R3,#0x70]  @ someptr[0x470] = mask. Probably view width-1?

RAM:020B0324                 ANDNE   R1, R1, R3      @ AND the X position with a mask.

RAM:020B0324                                         @ This means that the view width

RAM:020B0324                                         @ HAS TO BE A POWER OF TWO for level wrap!

RAM:020B0328                 CMP     R1, #0x2000     @ if x out of lvl

RAM:020B032C                 BCS     outOfLvl

RAM:020B0330                 CMP     R2, #0x1000     @ if y out of lvl

RAM:020B0330                                         @ go away

RAM:020B0334                 BCS     outOfLvl        @ else stay here, we're in level

RAM:020B0338                 MOV     R3, R1,ASR#8    @ R3 = mario.x / 256: x block

RAM:020B033C                 MOV     R1, R2,ASR#8    @ r1 = mario.y / 256: y block

RAM:020B0340                 ADD     R1, R3, R1,LSL#5 @ R1 = xblock + yblock*32: block offset

RAM:020B0340                                         @ (level is 32 blocks width)

RAM:020B0344                 ADD     R0, R0, R1

RAM:020B0348                 LDRB    R0, [R0,#0x64]  @ ptr[0x64 + blockoffs] is the block number

RAM:020B034C                 BX      LR

RAM:020B0350 @ ---------------------------------------------------------------------------

RAM:020B0350

RAM:020B0350 outOfLvl:                               @ CODE XREF: getLevelBlockNumber+24j

RAM:020B0350                                         @ getLevelBlockNumber+2Cj

RAM:020B0350                 MOV     R0, #0

RAM:020B0354                 BX      LR

RAM:020B0354 @ End of function getLevelBlockNumber

RAM:020B0354





=====================

This is part of another function, but what it does is get the map16 tile at a position.



RAM:020AF934                 BL      getLevelBlockNumber @ (ptr, x, y)

RAM:020AF938                 LDR     R2, =levelBlockPtrsByNum @ RAM:020CAFE0

RAM:020AF93C                 AND     R1, R6, #0xF0

RAM:020AF940                 LDR     R2, [R2,R0,LSL#2] @ R2 = pointer to lvl blk

RAM:020AF944                 MOV     R1, R1,ASR#4    @ R1 = Y tile

RAM:020AF948                 AND     R0, R4, #0xF0

RAM:020AF94C                 ADD     R1, R2, R1,LSL#1 @ R1 = pointer to row

RAM:020AF950                 MOV     R0, R0,LSL#1    @ R0 = row offs

RAM:020AF954                 LDRH    R1, [R1,R0]     @ R1 = map16 tile

Dirbaio	Posted on 11-14-11, 07:02 pm Hi. Link ID: 5947 +0
Super Mario ( ͡° ͜ʖ ͡°) Karma: 10010 Posts: 1123/4457 Since: 06-08-11	Yea... Well, that's the actual level data. Instead the good thing to do would be to have a savestate of the ROM in the level loading screen, and then edit the "level number" in RAM so that it loads the specified level.

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