Detecting 2 Player screen splitting

[Sambo]

Is it possible to detect when the screen has split in 2 player mode with lunaLUA? I'm trying to make a custom HUD that works in 2-player mode.

Also, is it possible to load a different image into each player's screen? Currently, the same image will be loaded into both screens at the same position when the placeSprite function is used.

[Veudekato]

I think no yet,or never. Becouse split is not memory (yes?)

[Sambo]

There must be a memory address for "is screen split" somewhere in SMBX. Every function of a program has a memory address.

[Kevsoft]

After some searching:

Code: Select all

-- 0 = is not split
-- -1 (0xFFFF) = is split
local isSplit = mem(mem(0x00B25124, FIELD_DWORD)+144, FIELD_WORD)


[Sambo]

Thanks. What did you do to figure that out? I think it could be useful to know.
Is there a way to tell the direction in which the screen has split?

Also, since you're the creator of LunaLUA, you probably know this. Is it possible to load an image only on player 1's screen or on player 2's screen and not both?

[Kevsoft]

Thanks. What did you do to figure that out? I think it could be useful to know.

Cheat Engine. Finding the address by searching between 0 and -1 and then use write trace for this address.

Is there a way to tell the direction in which the screen has split?

Did not find anything about that yet.

Is it possible to load an image only on player 1's screen or on player 2's screen and not both?

I didn't look into that, because I mainly designed LunaLua for single player.

[Sambo]

Cheat Engine. Finding the address by searching between 0 and -1 and then use write trace for this address.

I was going to try to do that, but I didn't know exactly what values I was looking for.

Did not find anything about that yet.

The size of each player's screen is different depending on the way it splits. Perhaps it would be possible to find the address of screen size, and determine split direction through that.
EDIT: Found addresses for screen size:

Code: Select all

screen_width = mem(0x00d451f8, FIELD_DWORD)
screen_height = mem(0x00d45200, FIELD_DWORD)
if screen_width == 400 then
  split_dir = "Vertical"
end
if screen_height == 300 then
  split_dir = "Horizontal"
end

I didn't look into that, because I mainly designed LunaLua for single player.

You should add that, because it would be useful and it would encourage people to continue making 2-player compatible games. I haven't seen many episodes that work well with 2 players lately.

[Sambo]

I have encountered a problem. It seems that the screen dimensions are not stored in the same memory addresses every time the program runs. Is there a way around this issue?