Homebrew [Release] Lua Player Plus 3DS (lpp-3ds) - LUA interpreter for 3DS

[Rinnegatamante]

Good to know and helpful, changes the way I code most of this, but I seem to still have the same problem.

Made some basic test code, ran by itself, to try to isolate the problem.

Socket.init()
client = 0
while client == 0 do
  client = Socket.connect("192.168.1.201", 6667)
end
Socket.send(client, "TEST")
Socket.close(client)
Socket.term()
while true do
  if Controls.check(Controls.read(), KEY_START) then
    System.exit()
  end
end

Behavior seems to depend on lpp-3ds version.

On R4 and the november nightly:

Error: [string "?"]:4: Failed connecting server.

However, on current git:

Error: [string "?"]:6: bad argument #1 to 'send' (number expected, got nil)

This seems to imply that if it can't connect, as of the current git instead of throwing up an error it returns nil. Which is handy, but if I test for that then I just get to debugprint my own way of saying "Connection failed."

On the receiving end, I occasionally get half-open connections which cause netcat to quit as though something connected to it and then left, but mostly seem to get nothing.

Since I did get the net_request_string sample working, I decided to try this just once, seeing as it's contacting the same server:

Socket.init()
client = 0
while client == 0 do
  client = Socket.connect("rinnegatamante.netsons.org", 80)
end
Socket.send(client, "GET /\r\n")
Socket.close(client)
Socket.term()
while true do
  if Controls.check(Controls.read(), KEY_START) then
  System.exit()
  end
end

Exact same result, either "Failed connecting server" or an attempt to send to a nil socket, depending on lpp-3ds version.

There isn't a DNS resolver right now for hostnames resolutions. Try to change the while loop condition from client == 0 to client == nil

 

[Insidious611]

Hmm... alright. I have two questions though. If I'm just looping around reconnecting whenever I get nil, how do I detect a legitimately failed connection, like a connection refused or a timeout?

The second... Using this code now:

Socket.init()
client = nil
while client == nil do
  client = Socket.connect("192.168.1.201", 6667)
end
Socket.send(client, "TEST\r\n")
timer = Timer.new()
mytime = Timer.getTime(timer)
while mytime < 5000 do
  Screen.waitVblankStart()
  mytime = Timer.getTime(timer)
end
Socket.close(client)
Socket.term()
while true do
  if Controls.check(Controls.read(), KEY_START) then
  System.exit()
  end
end

I can get a definite connection, but no packets seem to actually be sent. I added the timer because I thought maybe this was due to me not giving enough time for the nonblocking I/O to complete before closing the socket, but even after 5 full seconds the server has received no packets. So err, what's going on now?

EDIT: Okay, nevermind the second bit. Apparently that was down to netcat for once, I wiresharked it and the packets are being sent.

 

[PabloMK7]

I'm trying to use System.listDirectory(System.currentDirectory().."gamefs/Course"), to list the files inside a folder, can someone tell me the useage, because it isn't working.

 

[ihaveahax]

I'm trying to use System.listDirectory(System.currentDirectory().."gamefs/Course"), to list the files inside a folder, can someone tell me the useage, because it isn't working.

System.listDirectory(System.currentDirectory().."/gamefs/Course")

note the extra /

 

[PabloMK7]

I noticed it, but still the same, if I list the number of entries, it gives me the correct number.
I want the filenames, f. ex: Gctr_ToadCircuit.szs.

I read at Organiz3d source, and I see its usage is "strange". Could anyone tell me how it works? :S

 

[ihaveahax]

I noticed it, but still the same, if I list the number of entries, it gives me the correct number.
I want the filenames, f. ex: Gctr_ToadCircuit.szs.

list = System.listDirectory(System.currentDirectory().."/gamefs/Course")
for k, v in pairs(list) do
    -- do something with v.name, v.size, and v.directory (is it a directory?)
end

 

[PabloMK7]

Is there any way to order the files alphabetically, or are they already alphabetically ordered?

 

[ihaveahax]

Is there any way to order the files alphabetically, or are they already alphabetically ordered?

try this. I haven't actually tested it but it should work. I remember reading something like this from the ORGANIZ3D source...

list = System.listDirectory(System.currentDirectory().."/gamefs/Course")
table.sort(list, function (a, b) return (a.name:lower() < b.name:lower() ) end)

 

[PabloMK7]

I'm having troubles with file listing, I used this code (from Organiz3d source):

Spoiler

System.currentDirectory("/CTGP-7/")
function TableConcat(t1,t2)
    for i=1,#t2 do
        t1[#t1+1] = t2[i]
    end
    return t1
end
function getfilename(dir)
    folders_table = {}
    files_table = {}
    for i,file in pairs(dir) do
        if file.directory then
            table.insert(folders_table,file)
        else
            table.insert(files_table,file)
        end
    end
    table.sort(files_table, function (a, b) return (a.name:lower() < b.name:lower() ) end)
    table.sort(folders_table, function (a, b) return (a.name:lower() < b.name:lower() ) end)
    return_table = TableConcat(folders_table,files_table)
    return return_table
end
filenames = getfilename(System.listDirectory(System.currentDirectory().."gamefs/Course"))
while true do
Screen.debugPrint(0, 20, filenames[1].name, Color.new(255,255,255),TOP_SCREEN)
end

It's not printing anything.

 

[Rinnegatamante]

I'm having troubles with file listing, I used this code (from Organiz3d source):

Spoiler

System.currentDirectory("/CTGP-7/")
function TableConcat(t1,t2)
    for i=1,#t2 do
        t1[#t1+1] = t2[i]
    end
    return t1
end
function getfilename(dir)
    folders_table = {}
    files_table = {}
    for i,file in pairs(dir) do
        if file.directory then
            table.insert(folders_table,file)
        else
            table.insert(files_table,file)
        end
    end
    table.sort(files_table, function (a, b) return (a.name:lower() < b.name:lower() ) end)
    table.sort(folders_table, function (a, b) return (a.name:lower() < b.name:lower() ) end)
    return_table = TableConcat(folders_table,files_table)
    return return_table
end
filenames = getfilename(System.listDirectory(System.currentDirectory().."gamefs/Course"))
while true do
Screen.debugPrint(0, 20, filenames[1].name, Color.new(255,255,255),TOP_SCREEN)
end

It's not printing anything.

You never call waitVblankStart, flip and refresh.

 

[PabloMK7]

You never call waitVblankStart, flip and refresh.

Yes I know, that is just an example. My code have them.

 

[Biont]

Hello and thank you for this amazing library. It's incredibly easy to get started with and I am having loads of fun.
I have been looking for a good excuse to finally try something in Lua for a while and it feels great to do so on a hacked N3DS (which I bought a few days ago)

2 Questions:
1:
Would you recommend implementing some kind of spritesheet/textureatlas when using the Graphics module? I mean having most many different graphics on a single bitmap grid and then making generous use of drawPartialImage/drawImageExtended to render out a portion of it? Is it a good idea to do something like that or is there some unwanted overhead to the extended Graphics methods?
I'm creating a match-3-puzzler, so having all "gems" in some sort of single-image-grid sounded like an obvious choice

Feel free to accuse me of premature optimization, but Citra is giving me ~0.5fps while my N3DS still breezes through it.
Before I settle for the unfortunate (albeit obvious) solution to do my 3DS tinkering on my powerful work PC (which is something I wanted to escape after a workday), I just wanted to know if there's something wrong with my approach in general


2:
Is there any way to use 3D effects while using the GPU? Only the Screen methods seem to support depth right now.

 

[Rinnegatamante]

Hello and thank you for this amazing library. It's incredibly easy to get started with and I am having loads of fun.
I have been looking for a good excuse to finally try something in Lua for a while and it feels great to do so on a hacked N3DS (which I bought a few days ago)

2 Questions:
1:
Would you recommend implementing some kind of spritesheet/textureatlas when using the Graphics module? I mean having most many different graphics on a single bitmap grid and then making generous use of drawPartialImage/drawImageExtended to render out a portion of it? Is it a good idea to do something like that or is there some unwanted overhead to the extended Graphics methods?
I'm creating a match-3-puzzler, so having all "gems" in some sort of single-image-grid sounded like an obvious choice

Feel free to accuse me of premature optimization, but Citra is giving me ~0.5fps while my N3DS still breezes through it.
Before I settle for the unfortunate (albeit obvious) solution to do my 3DS tinkering on my powerful work PC (which is something I wanted to escape after a workday), I just wanted to know if there's something wrong with my approach in general


2:
Is there any way to use 3D effects while using the GPU? Only the Screen methods seem to support depth right now.

I suggest you to use the lowest number of images you can cause rendering a part or a full image are the same GPU intensive but loading lower number of images will result in a lower loading time obviously.
For the 3D effect, it's completely usable also for Graphics module. you can use it by enabling it with Screen.enable3D() and then use Graphics.initBlend(TOP_SCREEN, LEFT_EYE) and Graphics.initBlend(TOP_SCREEN, RIGHT_EYE) to blend on different framebuffers.

If you're looking on a 3D Game Engine, i recently released also Lua RayCast3D for lpp-3ds which allows you to make 3D games with a pretty simple engine working on lpp-3ds: https://gbatemp.net/threads/w-i-p-lua-raycast3d-3d-game-engine-for-lpp-3ds.407381/

A game created using it is Labyrinth 3D: http://gbatemp.net/threads/re-release-labyrinth-3d.409007/

 

[Biont]

I suggest you to use the lowest number of images you can cause rendering a part or a full image are the same GPU intensive but loading lower number of images will result in a lower loading time obviously.

So I assume that's a "yes" to using a texture atlas, then.

For the 3D effect, it's completely usable also for Graphics module. you can use it by enabling it with Screen.enable3D() and then use Graphics.initBlend(TOP_SCREEN, LEFT_EYE) and Graphics.initBlend(TOP_SCREEN, RIGHT_EYE) to blend on different framebuffers.

Ah! I missed that argument for initBlend(). Might have taken the hint if I had noticed it. Thank you, this looks just like what I need

If you're looking on a 3D Game Engine, i recently released also Lua RayCast3D for lpp-3ds which allows you to make 3D games with a pretty simple engine working on lpp-3ds: https://gbatemp.net/threads/w-i-p-lua-raycast3d-3d-game-engine-for-lpp-3ds.407381/

A game created using it is Labyrinth 3D: http://gbatemp.net/threads/re-release-labyrinth-3d.409007/

Whoa. I will have to check those out! Haven't noticed them yet. Great work.

Thank you for your reply and keep up the great work.

 

[Biont]

I am getting errors in Citra whenever I call table.getn()
Does that ring any bell? I'm reading that this is essential for iterating over tables and ZeroBrane does not give me any errors. What am I doing wrong?

It says "attempt to call a nil value (fields 'get0/"

 

[GalladeGuy]

Can someone please help me? Whenever I try making a program that prints an image, it gives me an error. Even the image example gives me an error. Is this a bug? Or am I just being stupid? Here is the error:

Error: [string "?"]:6: attempt to access wrong memory block type

And here's the code from the image example:

white = Color.new(255,255,255)
black = Color.new(0,0,0)
oldpad = Controls.read()
bitmap2 = Screen.loadImage("/file.bmp")
bitmap = Screen.createImage(1,1,black)
Screen.flipImage(bitmap2,bitmap)
Screen.fillRect(50,150,1,15,white,bitmap2)
Screen.debugPrint(51,3,"Image...OK!",black,bitmap2)
while true do
    Screen.waitVblankStart()
    Screen.refresh()
    pad = Controls.read()
    if (Controls.check(pad,KEY_A)) then
        System.exit()
    end
    if (Controls.check(pad,KEY_B)) and not (Controls.check(oldpad,KEY_B)) then
        Screen.saveBitmap(bitmap2,"/bitmap.bmp")
        System.takeScreenshot("/screenshot.bmp",false)
    end
    Screen.drawImage(100,127,bitmap2,TOP_SCREEN)
    Screen.drawImage(60,0,bitmap,BOTTOM_SCREEN)
    Screen.flip()
    oldpad = pad
end

 

[Biont]

Can someone please help me? Whenever I try making a program that prints an image, it gives me an error. Even the image example gives me an error. Is this a bug? Or am I just being stupid? Here is the error:

Error: [string "?"]:6: attempt to access wrong memory block type

I can't see the issue in your specific code, but I am aware of to causes for the error you're getting:

- Using the wrong module (loading an image from the Screen module, but accessing it from the Graphics module). There's a converter method for this use case
- Using a wrong file name. In my case, I accidentally tried to load a .bmp when the file was actually a .png, because I did not properly look at the file I was using. But maybe a simply non-existing file triggers that kind of error as well.

So since you're not mixing Screen/Graphics modules, I'd say have a very close look at your filename and see if it actually points to the file you're trying to load

 

[Rinnegatamante]

I am getting errors in Citra whenever I call table.getn()
Does that ring any bell? I'm reading that this is essential for iterating over tables and ZeroBrane does not give me any errors. What am I doing wrong?

It says "attempt to call a nil value (fields 'get0/"

getn method has been removed by Lua 5.2. If you want to know the number of elements in your table, you now have to use the # function. Example:

table = {1, 2, 3, 4, 5}
num_elements_in_table = #table

 

[GalladeGuy]

I can't see the issue in your specific code, but I am aware of to causes for the error you're getting:

- Using the wrong module (loading an image from the Screen module, but accessing it from the Graphics module). There's a converter method for this use case
- Using a wrong file name. In my case, I accidentally tried to load a .bmp when the file was actually a .png, because I did not properly look at the file I was using. But maybe a simply non-existing file triggers that kind of error as well.

So since you're not mixing Screen/Graphics modules, I'd say have a very close look at your filename and see if it actually points to the file you're trying to load

Thanks! Turns out, I had the filepath pointing to the root of the SD Card, even though they were in the actual folder. Kind of a stupid mistake.

 

[Rinnegatamante]

I spent some time improving sampled and fully commenting them to make them more understandable.

You can find them here: https://github.com/Rinnegatamante/lpp-3ds/tree/master/samples