Lua Programming Help Thread

1. How to make sounds when you press a button <-- Figured out

2. How to make music play in background ( I got to work I told you guys i can figure out stuff LMAO)

3. How to make it go some where else, For example Main menu >> Sub menu <-- LOL I crossed half out cuz i found a site that showed me how to make the code im just having problem with adding something after the text... Start >> Nothing here i need Start >> my thingy here

4. How to make something like... Do you want to continue Press O to continue or X to quit <-- Figured it out

I neeed to see the code I order to figure out the problem.
Here is a little test to see if this is what you are looking for.

Code:

---

--This is for the new LPHMv2
white = Color.new(255,255,255,255)
black = Color.new(0,0,0,255)
state = ""
quit = nil
pad = Controls.read()

while true do
    oldpad = pad
    pad = Controls.read()

    if state = "Main Menu" then
          screen.print(110,200,"Options",0.6,white,black)

          if pad:cross() and oldpad:cross() ~= pad:cross() then
              state = "Options Menu"
          end
    elseif state = "Options Menu" then
          screen.print(110,200,"Quit",0.6,white,black)

          if pad:cross and oldpad:cross() ~= pad:cross() then
              quit = 1
          end

          if pad:circl() and oldpad:circle() ~= pad:circle() then
              state = "Main Menu"
          end
    end

    if quit = 1 then System.quit() --not sure if it is "Quit" or "quit"
end

---

Don't use strings for constants .

Code:

---

--This is for the new LPHMv2
STATE_MAIN = 0
STATE_OPTIONS = 1

white = Color.new(255,255,255,255)
black = Color.new(0,0,0,255)
state = STATE_MAIN
quit = false
pad = Controls.read()

while true do
    oldpad = pad
    pad = Controls.read()

    if state == STATE_MAIN then
          screen.print(110,200,"Options",0.6,white,black)

          if pad:cross() and oldpad:cross() ~= pad:cross() then
              state = STATE_OPTIONS
          end
    elseif state == STATE_OPTIONS then
          screen.print(110,200,"Quit",0.6,white,black)

          if pad:cross and oldpad:cross() ~= pad:cross() then
              quit = true
          end

          if pad:circle() and oldpad:circle() ~= pad:circle() then
              state = STATE_OPTIONS
          end
    end

    if quit == true then System.quit() --not sure if it is "Quit" or "quit"
end

---

There are better ways of handling a menu, but meh.

Ya that works too.

I need something for LPHMv1

Why is there two pad = Controls.read()?

I'm guessing typo?

Zitat:

---

Zitat von dan369

Why is there two pad = Controls.read()?

---

I am only seeing one in the main loop.

Zitat:

---

Zitat von Nielkie

Don't use strings for constants .

Code:

---

--This is for the new LPHMv2
STATE_MAIN = 0
STATE_OPTIONS = 1

white = Color.new(255,255,255,255)
black = Color.new(0,0,0,255)
state = STATE_MAIN
quit = false
pad = Controls.read()

while true do
    oldpad = pad
    pad = Controls.read()

    if state == STATE_MAIN then
          screen.print(110,200,"Options",0.6,white,black)

          if pad:cross() and oldpad:cross() ~= pad:cross() then
              state = STATE_OPTIONS
          end
    elseif state == STATE_OPTIONS then
          screen.print(110,200,"Quit",0.6,white,black)

          if pad:cross and oldpad:cross() ~= pad:cross() then
              quit = true
          end

          if pad:circle() and oldpad:circle() ~= pad:circle() then
              state = STATE_OPTIONS
          end
    end

    if quit == true then System.quit() --not sure if it is "Quit" or "quit"
end

---

---

I wasn't saying about the main loop.Bolded.

To properly initialise oldpad. If that wasn't done, pad would be nil where oldpad = pad and therefore oldpad will be nil for the first frame.

Yeah but the variable isn't called oldpad, oldpad is nil it doesn't exist. In his code. Also isn't text printed to the back buffer then flipped on-screen? Nowhere in there is any screen.flipscreen().

It exists from when he assigns it...

The snippet is just a quick demo of states, not meant to be run. If anything criticize the method, not technicalities.

Code:

---

--This is for LPHMv1
STATE_MAIN = 0
STATE_OPTIONS = 1

white = Color.new(255,255,255)
state = STATE_MAIN
quit = false
pad = Controls.read()

while true do
    screen.clear()
    oldpad = pad
    pad = Controls.read()

    if state = STATE_MAIN then
          screen:print(110,200,"Options",white)

          if pad:cross() and oldpad:cross() ~= pad:cross() then
              state = STATE_OPTIONS
          end
    elseif state = STATE_OPTIONS then
          screen:print(110,200,"Quit",white)

          if pad:cross and oldpad:cross() ~= pad:cross() then
              quit = true
          else
              quit = false
          end

          if pad:circle() and oldpad:circle() ~= pad:circle() then
              state = STATE_MAIN
          end
    end

    if quit == true then os.quit() --This might not work.

    screen.flip()
end

---

this should work for LPHMv1

Zitat:

---

Zitat von dan369

Yeah but the variable isn't called oldpad, oldpad is nil it doesn't exist.

---

Which is the problem. Consider the following code:

Code:

---

quit = false

while true do
    oldpad = pad
    pad = Controls.read()
    -- rest of code

---

For the very first frame, prior to this line:

Code:

---

oldpad = pad

---

Neither oldpad or pad have been assigned a value therefore pad is nil and oldpad is assigned a nil value.

For the rest of the first frame, oldpad is nil and trying to call a method on a nil object (such as oldpad:cross()) causes a runtime error.

im coding a new program with luaplayer HM V2 and i can write from the flash 0 but not to it. any ideas? im confident its coded right but i could be wrong.please help.

have you reassigned the flash0?

yup . the program runs but when I try 2 write to flash 0 the program runs normal and gives me my success message and says it copied but when i exit the program and check the files its still my original files. p.s. i dont get any errors in my program at all. it just doesnt flash the files even tho it says it did? any ideas??? please help. its a big program and thats the only part thats not done. thanx again

is luaplayerhmv2 even capable of writing to the flash 0? do i have 2 add n e thing besides the usual F0 assign/unassign script?

take a look into the driver flashing script released with luaplayer HM v8

Regards
LXD

thanx will do

LOL Im back with my menu questions i am using this code

Spoiler for Code:

red = Color.new(255, 0, 0)
white = Color.new(255, 255, 255)

Select = 1
maxSelect = 2
oldpad = Controls.read()

while true do
pad = Controls.read()
screen:clear()

if pad:up() and oldpad:up() ~= pad:up() then
Select = Select - 1
end

if pad:down() and oldpad:down() ~= pad:down() then
Select = Select + 1
end

if Select > maxSelect then
Select = 1
elseif Select <= 0 then
Select = maxSelect
end

if Select == 1 then
screen:print(334,202,"SIN GLE PLAYER", red)
screen:print(334,220,"EXI T",white)
end

if Select == 2 then
screen:print(334,202,"SIN GLE PLAYER", white)
screen:print(334,220,"EXI T",red)
end

if pad:cross() and Select == 1 then
screen:clear()
screen:print(10,10,"This is a test to see whats going on",white)
screen.flip()
screen.waitVblankStart()
end

if pad:cross() and Select == 2 then
screen:clear()
break
end

screen.waitVblankStart()
screen.flip()
oldpad = pad
end

Ok so the menu looks fine but when i press on Start it displays my text

Code:

---

"This is a test to see whats going on"

---

but it will only display my text for as long as i hold the X button i want it to be so i can let go and it will still stay there and also if some one could tell me what i have to add so it will be like... press start to return back to the menu i have tried every thing i can think of any help would be apperciated

to sum it up

Menu >> press X the text needs to stay there without holding the X button >> and maybe something so i can return back to the menu



THANKS

Where is says this:

Code:

---

if pad:cross() and Select == 1 then
screen:clear()
screen:print(10,10,"This is a test to see whats going on",white)
screen.flip()
screen.waitVblankStart()
end

---

Put this:

Code:

---

if pad:cross() and Select == 1 then
  while true do
    screen:clear()

    screen:print(10,10,"This is a test to see whats going on.",white)
    screen:print(20,10,"Press start to go back to main menu.",white)

    if Controls.read():start() then break end

    screen.flip()
    screen.waitVblankStart()
  end
end

---

Dude you rock :D thanks =D

Just a quick question. Since the pdf file for LuaPlayerHMv2 seems to down, if anyone here has it could they upload it somewhere and provide a link? Thanks.

If no one has a link, then could someone tell me how to file io. Thanks.

heres the documentation
http://www.sendspace.com/file/lmmszs

heres a tutorial how to use the io libary
lua-users wiki: Io Library Tutorial


Regards
LXD

can someone please help me get IntraFont working in LuaPlayer HM8?

the code i've tried already is:

'Gu.start3d()
IntraFont.init()
red = Color.new(255, 0, 0)
green = Color.new(0, 255, 0)
blue = Color.new(0, 0, 255)
white = Color.new(255, 255, 255)

font = IntraFont.load(font.pgf)

while true do
screen.clear()
end

blah

IntraFont.print(font, x, y, 12, color, "text")

blah

IntraFont.unLoad(font)
IntraFont.term()
Gu.end3d()
end"

please help.

btw, im on my psp right now so thats why the code is in quotes.

try this code

Zitat:

---

IntraFont.init()
IntraFont.load("flash0:/font/ltn8.pgf",2)
white = IntraFont.color(255,255,2 55,255)
red = IntraFont.color(255,0,0,2 55)
while true do
screen:clear()
Gu.start3d()
IntraFont.print(10,10,"In trafont",1,white,red)
Gu.end3d()
screen.flip()
screen.waitVblankStart()
end

---

Regards
LXD

i'm kind of new to lua and would like to make a menu, i have the basics but would like to make it so you could click start and it would appear and then click exit to make it dissapear. Right now i have it so you have to hold down start to make the menu appear, when you let go it dissapears.:( Can anyone help me(not useing PGE or HM lua) Heres my code:

Code:

---

--        5/24/2009-X/YY/2009
--        Modifyed by Cmbeke
--        Taken From :
--                http://www.evilmana.com/tutorials/codebase/simple_menu.php

--Basic Loading Instructions
dofile("System\\colors.lua")
dofile("System\\variables and buttons.lua")
dofile("System\\font.lua")
dofile("System\\functions.lua")

--Selects an option from the menu
current = 1
checkpad = Controls.read()

while true do
--Reads Controls
pad = Controls.read()
--Tells if menu is viewable or not
viewable = 0
--Colors the Screen
screen:clear(blue2)
--Shows Menu
if pad:start() then
viewable = 1
end

-- Menu Options
if viewable == 1 then
screen:fillRect(35, 40, 130, 200, blue3)
screen:fontPrint(ComicSans5, 45,75,"Start",blue4)
screen:fontPrint(ComicSans5, 45,125,"Options",blue4)
screen:fontPrint(ComicSans5, 45,175,"Cancle",blue4)
screen:fontPrint(ComicSans5, 45,225,"Quit",blue4)

--Selecting the Option
if current == 1 then
screen:fontPrint(ComicSans5, 45,75,"Start",red)
end
if current == 2 then
screen:fontPrint(ComicSans5, 45,125,"Options",red)
end
if current == 3 then
screen:fontPrint(ComicSans5, 45,175,"Cancle",red)
end
if current == 4 then
screen:fontPrint(ComicSans5, 45,225,"Quit",red)
end
end

if viewable == 1 then
if pad:up() and checkpad:up() ~= pad:up() then
current = current - 1
end
if pad:down() and checkpad:down() ~= pad:down() then
current = current + 1
end
--Scrolling Options
if current == 5 then
current = 1
end
if current == 0 then
current = 4
end
--Activating Option
if pad:cross() and current == 1 then
--loadfile
end
if pad:cross() and current == 2 then
--loadfile/menu
end
if pad:cross() and current == 3 then
viewable = 0
end
if pad:cross() and current == 4 then
break
end

end
screen.waitVblankStart()
screen.flip()
checkpad = pad
end

---

hey LXD thanks for your help but now it's saying bad arguments to the line

EDIT
nevermind, i fixed it.
thanks for helping me getting the intrafont to work!

Code:

---

--        5/24/2009-X/YY/2009
--        Modifyed by Cmbeke
--        Taken From :
--                http://www.evilmana.com/tutorials/codebase/simple_menu.php

--Basic Loading Instructions
dofile("System\\colors.lua")
dofile("System\\variables and buttons.lua")
dofile("System\\font.lua")
dofile("System\\functions.lua")

--Selects an option from the menu
current = 1
checkpad = Controls.read()

viewable = 0

while true do
--Reads Controls
pad = Controls.read()
--Colors the Screen
screen:clear(blue2)
--Shows Menu
if pad:start() then
viewable = 1
end

-- Menu Options
if viewable == 1 then
screen:fillRect(35, 40, 130, 200, blue3)
screen:fontPrint(ComicSans5, 45,75,"Start",blue4)
screen:fontPrint(ComicSans5, 45,125,"Options",blue4)
screen:fontPrint(ComicSans5, 45,175,"Cancle",blue4)
screen:fontPrint(ComicSans5, 45,225,"Quit",blue4)

--Selecting the Option
if current == 1 then
screen:fontPrint(ComicSans5, 45,75,"Start",red)
end
if current == 2 then
screen:fontPrint(ComicSans5, 45,125,"Options",red)
end
if current == 3 then
screen:fontPrint(ComicSans5, 45,175,"Cancle",red)
end
if current == 4 then
screen:fontPrint(ComicSans5, 45,225,"Quit",red)
end
end

if viewable == 1 then
if pad:up() and checkpad:up() ~= pad:up() then
current = current - 1
end
if pad:down() and checkpad:down() ~= pad:down() then
current = current + 1
end
--Scrolling Options
if current == 5 then
current = 1
end
if current == 0 then
current = 4
end
--Activating Option
if pad:cross() and current == 1 then
--loadfile
end
if pad:cross() and current == 2 then
--loadfile/menu
end
if pad:cross() and current == 3 then
viewable = 0
end
if pad:cross() and current == 4 then
break
end

end
screen.waitVblankStart()
screen.flip()
checkpad = pad
end

---

a variable set in the mainloop is resetting every loop passage.

so the menu is only active as long as you change the variable after resetting it.

you can fix that by initialising it somwhere outside the loop or by using the or operator
e.g.

Code:

---

viewable = 0 or viewable --could be written into the loop

---

equal to

Code:

---

if not viewable then --could be written into the loop to
viewable = 0
else
viewable = viewable
end

---

Regards
LXD

thanks lxd :)

i just switched luaplayers from HM8 to HMv2 and then it said a bunch that i fixed but now after it prints the font, it pauses and then crashes.
can somebody please help me with this problem?

Code:

---

kristen = Font.load("ms0:/PSP/GAME/Zero+/KristenITC.TTF", 8)
red = Color.new(255, 0, 0, 255)
green = Color.new(0, 255, 0, 255)
blue = Color.new(0, 0, 255, 255)
white = Color.new(255, 255, 255, 255)
black = Color.new(0, 0, 0, 0)

nickname = System.nickName()
battery = System.powerGetBatteryLifePercent()
life = System.powerGetBatteryLifeTime()
cfw = System.cfwVersion()
year = System.getDate(1)
month = System.getDate(2)
day = System.getDate(3)
hour = System.getTime(1)
minute = System.getTime(2)
second = System.getTime(3)
millisecond = System.getTime(4)

ms = 1
mms = 10

oldpad = Controls.read()

blah

blah
end

screen.print(x, y, "text", 1, color, glow, font)
screen.waitVblankStart()
screen.flipscreen()

blah
end

Font.print(font, x, y, "text", color)
screen.waitVblankStart()
screen.flipscreen()
oldpad = pad
end

---

Zitat:

---

Zitat von thatoneguy559

okay so now after i got the intrafont working, now im trying to add a custom font to normal text in my app but my app crashes after it loads a file a custom app in it. my code so far is:

---

why dont you try another luaplayer, HM8 is extremly slow ;)
anyway this is how to use the font engine

Zitat:

---

Font.init() Call befor loading Font. Starts the Font engine

Font.load("ms0:/font.ttf",1) Loads a font to a font slot (5 slots available)

white = Font.color(255,255,255,25 5)--you could use Intrafont.color() as well
while true do
screen:clear()
Font.print(10,10,"TEXT",w hite,1)--Prints test to the screen with a font.
screen.flip()
screen.waitVblankStart()
end

Font.unload(1) Unloads the font from slot 1
Font.term() Ends the Font engin

---

edit: could you post your entire code (without blah;))

nevermind i just fixed the problem. hey LXD, you've helped me alot. is it cool with you if i included your name in the credits for my app?

begginer question
this is as far as i got

--my first lua program
--june 25,2009 12:10
blue = Color.new(0,0,255)
screen:clear(blue)
screen:print(100,100,"hel low world",blue)
screen.waitVblankStart()
screen.flip()
end

and i keep getting this problem on the windows lua
C:/(the location)/index.lua:8:'<eof>'expect ed near'end'

any help would be appreciated.:o
-=Double Post Merge =-
oops. up above its supposed to say screen: print(100,100,"hel low world",blue)
minus this space(above the !) !

i cant really help you now but try going here: EvilMana Tutorials, these tutorials helped me get started with lua.:tup:




Finially I'm a Novice!

Zitat:

---

Zitat von scionsamurai

begginer question
this is as far as i got

--my first lua program
--june 25,2009 12:10
blue = Color.new(0,0,255)
screen:clear(blue)
screen:print(100,100,"hel low world",blue)
screen.waitVblankStart()
screen.flip()
end

and i keep getting this problem on the windows lua
C:/(the location)/index.lua:8:'<eof>'expect ed near'end'

any help would be appreciated.:o
-=Double Post Merge =-
oops. up above its supposed to say screen: print(100,100,"hel low world",blue)
minus this space(above the !) !

---

Wow that's bad.. yeah read the evil mana tuts man.

It should be;

Code:

---

--my first lua program
--june 25,2009 12:10
blue = Color.new(0,0,255)
screen:print(100,100,"hello world",blue)
screen.flip()
while true do
screen.waitVblankStart()
end

---

P.s Use a code box.

Zitat:

---

Zitat von thatoneguy559

nevermind i just fixed the problem. hey LXD, you've helped me alot. is it cool with you if i included your name in the credits for my app?

---

shure you can:)

Regards
LXD

wow! you guys are worthless in lua. you send scionsamurai to tutorials while the error is so OBVIOUS.

@scionsamurai: ever heard of a little thing called a loop ? you get an error because you tried to end something that you never started!
here's the good code:

Code:

---

--my first lua program
--june 25,2009 12:10
blue = Color.new(0,0,255)
while true do --this is where you start your loop
screen:clear(blue)
screen:print(100,100,"hel low world")
screen.flip()
screen.waitVblankStart()
end--and here's where you end it

---

Zitat:

---

Zitat von mootjeuh

wow! you guys are worthless in lua. you send scionsamurai to tutorials while the error is so OBVIOUS.

@scionsamurai: ever heard of a little thing called a loop ? you get an error because you tried to end something that you never started!
here's the good code:

Code:

---

--my first lua program
--june 25,2009 12:10
blue = Color.new(0,0,255)
while true do --this is where you start your loop
screen:clear(blue)
screen:print(100,100,"hel low world")
screen.flip()
screen.waitVblankStart()
end--and here's where you end it

---

---

mraellis already corrected the code.
learn reading threads befor calling someone worthless!

LXD