Lua Programming Help Thread

[TacticalPenguin]

You've got the general method correct, but if you wanna get rid of the offset for the . and .. directories, just add table.remove(files,1) table.remove(files,1) so that it gets rid of them and do it without the offset and count crap.

[parm289]

im making a personal lua flasher (key word = PERSONAL), and i want to incorporate extra checks before and after i flash the file. for example, lets say i try to flash an .rco and the filesize was supposed to be 242 kb, but the custom one being flashed is only 200 kb. i want the script to refuse to flash the file.

i'm sure this is pretty simple, but ive never had to do this before.

[Yongobongo]

Read the post just above for the method of getting file size and then once youve got that make a function like

if filesize(rco) then
-- flash file
else
-- error
end

[parm289]

ok thanks, didnt read the posts above.
EDIT: also, the filesize will be in bytes, right?
-= Double Post =-
one more question - how would you check the free space of flash0?

thanks for the help.

EDIT2: aahhh, another question - make that 2. first of all, with the new flash luaplayer, i get errors of iounassign, ioassign, etc, even in SG57's example. however, SG57's example worked, regardless. How can i fix these errors? i dont want luaplayer to be having errors as i'm flashing...

2nd question - luaplayer gives me the error that on line 91, it cannot find 'ms0:/wavebackup/', no script file found. Here is the line of code:

System.writeFile("flash0:/vsh/resource/system_plugin_bg.rco","ms0:/wavebackup/","no")

this line of code is after i re-assign flash0. i tried replacing "ms0:/wavebackup/" with "ms0:/wavebackup/system_plugin_bg.rco.back up" but i still get the same error - luaplayer can't find the script "ms0:/wavebackup/system_plugin_bg.rco.back up".

i would appreciate the answer as well as an explanation as to why luaplayer is looking for a script in this line of code.

Thanks again and sorry for so many questions.

[SG57]

parm - There is no io.Assign or io.Unassign.

There is System.Assign and System.Unassign ;)

As for your writeFile error, the second parameter ('destination file') isnt the destination folder, but the destination file. So...

System.writeFile("flash0:/vsh/resource/system_plugin_bg.rco","ms0:/wavedump/dumped_wave.rco","no")

That s what u want (note, you can change it from dumped_wave.rco to whatever.)

[parm289]

thanks, i figured the destination thing out and hit myself on the head.

as for the other part of your post, it isnt what u think is happening. when i exit any app by using the home button, a bunch of huge text pops up saying things like "io.assign p_kl: error_" and i was wondering what was happening in luaplayer. id feel much safer if no errors popped up, ya know what i mean?

[SG57]

parm - That happens on all versions of lua player. Its the deinitialization of various libraries (mikmod mainly). Try it on a different version and youll see the same thing ;)

[splodger15]

Does anyone know what the exit code is in Lua player 20 in 16 it was

os.exit()

doesnt work in 20. Whats the 20 exit code


Thanks

[eldiablov]

try break ?

[GuitarGod1134]

break from what i understand in c++ and im assumming its the same in lua will just exit the loop. but it might work

you can try System.Quit() or whatever. but i think thats only in the mod one.

[youresam]

There is no exit code. os.exit() just returns the value you give it (ex: os.exit(1)) to the parent process what executed it.

[eldiablov]

youresam will break work ?

zomg look at your points !

[parm289]

SG57 - thanks for the info, i hadnt seen it before.

[eldiablov]

Would it be feasible to make curveball in lua for someone of my programming ability ?

[Grimfate126]

Would it be feasible to make curveball in lua for someone of my programming ability ?

3d? maybe. im working on a port of curveball right now, and its not too challenging, but curving is complicated.

[SG57]

Grimfate - What about Assualt, Space Escape, etc.?

[youresam]

youresam will break work ?

zomg look at your points !

Break just exits the current loop, be it while or for.

[xpack]

os.exit() is the exit code for Shines luaplayer, but the mods use System.Quit(). Find out what luaplayer your using and that should fix everything.

[youresam]

os.exit() is the exit code for Shines luaplayer, but the mods use System.Quit(). Find out what luaplayer your using and that should fix everything.

...........

[k0ud]

hi can anyone give me an idea to show image in the screen screen like credits while loading the app?

lets say something like a credit and name of the app will stay 3 secs then go to the main app...
thx in advance

[GuitarGod1134]

Start a timer then blit the image and text according to the timer. I could write some code but its your game/app so Im sure you want to. lol (too lazy)

[k0ud]

hmmm i there a tut for that?
i dunno about the blit thing..
i know how to use the timer

thx

[youresam]

Image.blit(target,x,y,ima ge)

[playstationpod]

Hi

can anybody help me with this coding, if X pressed image upload.
I have tryed this but doesn't work.

code:
if pad:cross () then
image.load("image.png")
_________________________ _
But that doesn't work

[emericaska8r]

you don't need a timer.

just do:

screen:clear()
screen:blit(0,0,backgroundimage)
screen.watiVblankStart(60)

the 60 there can be changed to any number to wait longer or shorter
-= Double Post =-

Hi

can anybody help me with this coding, if X pressed image upload.
I have tryed this but doesn't work.

code:
if pad:cross () then
image.load("image.png")
_________________________ _
But that doesn't work

two things. first you need to assign that image to a variable. Also, the 'i' in image.load needs to be uppercase. heres what you should have:

variablename = Image.load("image.png")

[k0ud]

you don't need a timer.

just do:

screen:clear()
screen:blit(0,0,backgroundimage)
screen.watiVblankStart(60)

thx but...

hmm how do i load the image?

srry

[eldiablov]

bla = Image.load("image.extensi on")

[k0ud]

screen:clear()
screen:blit(0,0,backgroundimage) <-----ill leave this alone? or should i put the filename?
screen.watiVblankStart(60 )
-= Double Post =-
hmm it wont load load

[youresam]

Guys remember that lua uses variables and OOP.

[k0ud]

hmmm i feel out of place lol...
-= Double Post =-
This is my code:

screen:clear()
screen.watiVblankStart(180)
backgroundimage = Image.load("credits.png")
screen:blit(0,0, backgroundimage)

I get errors