Lua Programming Help Thread

[Xodiac21]

Umm can someone help? It says 'then' expected near '=' (line 38) and the code is

if life=0 then

wtf?

i think it should either be

if life == 0 then

or

if life = 0 then

[TPTaylor]

put another = sign with the = so
if life==0 then

[Mast3r_Shak3]

Yeah nvrmind i edited the post with my new error that is EVILLLL

[Xodiac21]

NVRMIND but at line 30 i get that retarded "loop in gettable' error. This is the line of the error.

if stick.x>480 then

if stick.x > 480 then

try wit spaces

[Mast3r_Shak3]

No dice...
black = Color.new(0, 0, 0)

life = 1
coll = 0

stick = Image.load("stick.png")
spike = Image.load("spike.png")
background = Image.load("background.pn g")
death = Image.load("death.png")

player = {}
player[1] = { x=240, y=200, life=1, stick=player[1] }
Okay look at the bold parts. is this possible? this might be the cause of my problems

[Altair]

No that is not possible. You say that player[1].stick=player[1]. You cant assign something to itself.

[Altair]

The songs play right after each other without the loop. The loop is there so the songs will play [one after another] 9999 times ( so for a long time ). There is no need to have it pause in game, it needs to be playing as soon as the game starts, but not in the menus.

Ok i understand, but again, what exactly is your problem? I just dont get your post where you state your problem. Because i think you left out a "t" after the "can", or am i wrong? Please say it again. (maybe im just being really stupid :o )

[cools]

Sorry, I forgot to mention it...

Well whenever i try to play that along the with the game, it only plays the music and doesnt let you play the game.

It will play along side game if i only tell it to playback one of the music files.

[Greenskull]

frame_1 = Image.load("frame_1.png")
frame_2 = Image.load("frame_2.png")
frame_3 = Image.load("frame_3.png")
screen:clear()

while (true) do
--Put image to memory and flip it to screen
	screen:blit(0, 0, frame_1)
	screen.flip()
--Keep frame showing for 8 milliseconds
	screen.WaitVblankStart(8)  
--Clear screen to start over
	screen:clear()

	screen:blit(0, 0, frame_2)
	screen.flip()
	screen.WaitVblankStart(8)  
	screen:clear()

	screen:blit(0, 0, frame_3)
	screen.flip()
	screen.WaitVblankStart(8)  
	screen:clear()
end

I was told to do this buit it says the waitVblank thibg is wrong. help please

[Electro]

can you have functions within functions?

[PSPHax0r9]

can you have functions within functions?

yes you can.

[Greenskull]

frame_1 = Image.load("frame_1.png")
frame_2 = Image.load("frame_2.png")
frame_3 = Image.load("frame_3.png")
screen:clear()

while (true) do
--Put image to memory and flip it to screen
	screen:blit(0, 0, frame_1)
	screen.flip()
--Keep frame showing for 8 milliseconds
	screen.WaitVblankStart(8)  
--Clear screen to start over
	screen:clear()

	screen:blit(0, 0, frame_2)
	screen.flip()
	screen.WaitVblankStart(8)  
	screen:clear()

	screen:blit(0, 0, frame_3)
	screen.flip()
	screen.WaitVblankStart(8)  
	screen:clear()
end

I was told to do this buit it says the waitVblank thibg is wrong. help please

yeah. It says something like "attempt to call WaitVblankStart (nil value) help please!

EDIT: aha! The "w" was capitalized. im good now but how do I make my animation loop over and over until I press X again?

[califrag]

yeah. It says something like "attempt to call WaitVblankStart (nil value) help please!

EDIT: aha! The "w" was capitalized. im good now but how do I make my animation loop over and over until I press X again?

try this:

white = Color.new(255, 255, 255)
frame_1 = Image.load("frame_1.png")
frame_2 = Image.load("frame_2.png")
frame_3 = Image.load("frame_3.png")

showAnimation = true
timer = Timer.new()

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

	if showAnimation then
		if timer:time() >= 0 and timer:time() <= 135 then 
			screen:blit(0, 0, frame_1)
		elseif timer:time() > 135 and timer:time() <= 270 then
			screen:blit(0, 0, frame_2)
		elseif timer:time() > 270 and timer:time() <= 405 then
			screen:blit(0, 0, frame_3)
		elseif timer:time() > 405 then
			timer:stop()
			timer:reset()
		end
	else
		screen:print(0, 0, "Paused!", white)
	end

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

	oldpad = pad
	screen.flip()
	screen.waitVblankStart(6)
end

[califrag]

EDIT: how can i make it so that the maht.random(26) doesnt take the same value twice??

here's the updated version of your deal or no deal script.it should work... it only takes each prize value once. from $0 to $1,000,000. The reason you had so many repeats is you had a couple prize values the same. This also displays the prize value in $0.00 format.

[SjaakRake]

      pad = Controls.read()
      oldpad = Controls.read()
      
      if pad:right() and pad ~= oldpad then
         x = x + 10
         oldpad = pad
      elseif pad:left() and pad ~= oldpad then
             x = x - 10
             oldpad = pad
      end
      if pad:start() then
         break
      end

Ok, the blipping stopped, but the highlighter doesn't move at all now. Which is fairly logic, because if right() is pressed, both pad and oldpad would be right(), so the if value would not be true.

[Altair]

Sorry, I forgot to mention it...

Well whenever i try to play that along the with the game, it only plays the music and doesnt let you play the game.

It will play along side game if i only tell it to playback one of the music files.

Ah yeah thats what i thought. Its because you pause the loop by using the waitVblanck's. So what you have to do is make a timer and if the timer is at a specific value (the length of your music) then you play the other musicfile.

[Altair]

@SjaakRake

I dont know why people use that code, but i know this works:

pad = Controls.read()

      if pad:right() and pad ~= oldpad then
         x = x + 10
         oldpad = pad
      elseif pad:left() and pad ~= oldpad then
             x = x - 10
             oldpad = pad
      end
      if pad:start() then
         break
      end

oldpad=pad

With this it puts the value of pad in oldpad after everything is done, so when it does a new loop then it has the value of the last loop and that is what you want.

[SjaakRake]

Haha, thanks, I'm so damn stupid, pretty logic.
PS. As you might have guessed, I'm dutch too, if you're interested in contacting me. PM me.

[cools]

Ah yeah thats what i thought. Its because you pause the loop by using the waitVblanck's. So what you have to do is make a timer and if the timer is at a specific value (the length of your music) then you play the other musicfile.

Ok, so it was the screen.waitVblank's that were messing up the code and I only need to change it to a timer. Thanks Altair!

[Altair]

no problem at all. Im looking forward to playing monopoly on my PSP!

[SjaakRake]

How would I make a string containing "? Can this be done through the hex value? If yes, how?

Blegh, I ask too much.

[Glynnder]

ok yea well done altair - how retarded of me, soz that was off the top of my head Sjaakrake

[kozine]

How do you compile a LUA app/game to an eboot.pbp so you dont have to run it with Luaplayer? I have Cygwin installed and the psptoolchain installed. What else do I need to do?

[Greenskull]

try this:

white = Color.new(255, 255, 255)
frame_1 = Image.load("frame_1.png")
frame_2 = Image.load("frame_2.png")
frame_3 = Image.load("frame_3.png")

showAnimation = true
timer = Timer.new()

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

	if showAnimation then
		if timer:time() >= 0 and timer:time() <= 135 then 
			screen:blit(0, 0, frame_1)
		elseif timer:time() > 135 and timer:time() <= 270 then
			screen:blit(0, 0, frame_2)
		elseif timer:time() > 270 and timer:time() <= 405 then
			screen:blit(0, 0, frame_3)
		elseif timer:time() > 405 then
			timer:stop()
			timer:reset()
		end
	else
		screen:print(0, 0, "Paused!", white)
	end

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

	oldpad = pad
	screen.flip()
	screen.waitVblankStart(6)
end

I am very confused about this "oldpad" thing. How do you make it so when you press X it starts and when you press it again it stops etc.?

[Altair]

How would I make a string containing "? Can this be done through the hex value? If yes, how?

Blegh, I ask too much.

Use this: \"
This has to be in the quotations of the string itself. So say you want to put "hello" in a variable but with the quotations, you have to do this:
text="\"hello\""

[Dutch]Ja dat dacht ik al ja. "Sjaak" kom je niet zo vaak tegen in het buitenland .[/Dutch]

[Altair]

ok yea well done altair - how retarded of me, soz that was off the top of my head Sjaakrake

Everybody has its "off"-days (is that how you say it?) and thx

[madsoul]

hi!

how do you repeat a sound so when it ends it start at the begining again? please help! thanks! :) btw, its a wav file if that helps.

[madsoul]

and how big should the wav file be so the lua player duzent hangs?? thanks

[Altair]

I dont know if there's a limit to the length or size, but i know it needs to be mono sound.
Here's the command and its argument:

Sound.load(filename, [bool loop])

So if you want it to loop then you say:

Sound.load(filename, true)

This site is really usefull: http://wiki.ps2dev.org/psp:lua_player:functions

[madsoul]

need help again!

ive made a menu. everything works exept that the intro song repeats it self from the moment it starts! wtf is wrong? help! please! :) here:

finalizar=1
while finalizar>0 do

screen:blit (0,0,menu)

musiclay()
Music.volume(128)

screenrint (420,10,"v 0.1",negro)
screenrint (421,261,"MADSOUL",Color. new(80,80,math.random (1 , 255)))
screenrint (420,260,"MADSOUL",Color. new(255,255,math.random (1 , 255)))
screenrint (120,5,"This is your",rojo)
screenrint (177,15,"last Score",rojo)
screenrint (270,10,puntos,Color.new (math.random (1 , 255),math.random (1 , 245),math.random (1 , 255)))

screen.waitVblankStart()
screen.flip()

pad = Controls.read()

if pad:cross() then
juego()
end

if pad:start() then
finalizar=0
end

end