Lua Programming Help Thread

[TeamOverload]

Originally Posted by MagicianFB

http://www.lua.org/pil/index.html#P3
http://luaplayer.org/functions.txt

k thanx

[SodR]

In Lua tutorial 2 you can display pic's when you push a button. But how do I do so the image doesn't disapear directly after a stop pushing the button??I want the picture/text to stay there.

And how do I change the size of the text/numers in my program??

Thanks in advance!

[TeamOverload]

can u post ur code??

[c5cha7]

Hi i really need some help here.
My new game Dragon Ball Portable is very dodgy.
It skatter's around.
Is the code alright?
(Please nobody steal this)
How can i get the Picture to move up aswell???

--c5cha7's DBP (Beta source)
--activate usb
System.usbDiskModeActivate()

--load text colors
red = Color.new(255, 0, 0)
blue = Color.new(0, 0, 255)
green = Color.new(0, 255, 0)
black = Color.new(0, 0, 0)
white = Color.new(255, 255, 255)

--Startup
intro = Sound.load("Data/Sounds/intro.wav")
luaplayer = Image.load("Data/images/lua.png")
intro:play()
screen:blit(0, 0,  luaplayer)
screen.flip(120)
screen.waitVblankStart(120)

-- Move Player

function move() 
local limit = -11 -- adjust the count limit as needed 
local pad = Controls.read() 

if (pad ~= oldpad) or (countpads > limit) then 

if pad:right() then 
playerPos = playerPos + 1 
if playerPos > 13 then playerPos = 13 end 
screen.waitVblankStart(2)
end 

if pad:left() then 
playerPos = playerPos - 1 
if playerPos < 0 then playerPos = 0 end 
screen.waitVblankStart(2)
end 

if pad:up() then 
playerPos = playerPos - 1 
if playerPos < 1 then playerPos = 1 end 
end 

if pad == oldpad then 
countpads = limit - 1 -- for repeatedly advanced 
else 
countpads = 0 -- for the first pressed 
end 
oldpad = pad 
else -- do nothing for a moment 
countpads = countpads + 1 
screen.waitVblankStart(5)
screen.waitVblankStart(4)
screen.waitVblankStart(1)
end 

end 

player = Image.load "player.png" 
playerPos = 1 
countpads = 0 

while true do 
screen:clear() 
move() 
screen:blit(32*playerPos, 120, player) 
screen.waitVblankStart() 
screen:flip() 
end

[SodR]

Sorry I forgot to post the code Here it is:

System.usbDiskModeActivate()

blue = Color.new(0, 0, 255)
orange = Color.new(223, 88, 6)
grey = Color.new(94, 97, 111)
yellow = Color.new(255, 255, 0)
black = Color.new(0, 0, 0)
white = Color.new(255, 255, 255)

x = 96
y = 96
speed = 3

while true do
screen:clear()

pad = Controls.read()

screen:print(x, y, "+", white)

if pad:select() then screen:save("screenshot.tga") end

if pad:start() then
		break
	end

if pad:analogX() < -30 then
x = x - speed
end

if pad:analogX() > 30 then
x = x + speed
end

if pad:analogY() < -30 then
y = y - speed
end

if pad:analogY() > 30 then
y = y + speed
end

   if pad:left() then
      x = x - 3
   end

   if pad:right() then
      x = x + 3
   end

   if pad:up() then
      y = y - 3
   end

   if pad:down() then
      y = y + 3
   end

   if pad:start() then
		break
	end

if pad:cross() then
screen:print(20, 18, "1", white)
end

screen.waitVblankStart()
screen.flip()

end

[Bilo]

What are the sound limitations in lua?..

I've been trying to make some background music, but what should it be in?

I've got various wavs playing on events but they fail to play when I try to start them at the main menu. I just want some background music.

Cheers.

[MagicianFB]

Originally Posted by Bilo

What are the sound limitations in lua?..

I've been trying to make some background music, but what should it be in?

I've got various wavs playing on events but they fail to play when I try to start them at the main menu. I just want some background music.

Cheers.

They can only be wavs.

[Bilo]

Well in that case, there is something wrong as the background audio I have wont play and it's a wav.

[MagicianFB]

Originally Posted by Bilo

Well in that case, there is something wrong as the background audio I have wont play and it's a wav.

Post your script.

[SodR]

Anyone who can help me with my qustion above??

[MagicianFB]

Originally Posted by SodR

Anyone who can help me with my qustion above??

Put the print flip and clear in the if's for the buttons to conrol position.

[Bilo]

Script at start -

sensiblesnd= Sound.load("sensible.wav" )

script to initiate sound -

sensiblesndlay()

[SodR]

Originally Posted by MagicianFB

Put the print flip and clear in the if's for the buttons to conrol position.

Could you write an example please? I doesn't exactly undrstand what you mean.

[MagicianFB]

Originally Posted by Bilo

Script at start -

sensiblesnd= Sound.load("sensible.wav" )

script to initiate sound -

sensiblesndlay()

I don't now, that should work.

[Bilo]

Hmm.. must be the sound file as if I replace one of my other sounds with it, then that sound fails to initiate too.

[lingon]

I'm having fat-as problem with this really simple thing. But im a noob so...=)
anyway how can I make it so that the program can "back" one screen so that I for instance after pressing a button can go back to the titelscreen?

[Bilo]

um...

if pad:triangle() then
mainmanu()
end

Something like that, main menu being a function previously set.

[Virtue]

Can anyone post an example using a function such as the main menu? Thanks so much.

[cools]

well im working on something extremely minor, but it wont load. I keep getting an error.

..........

I got it up and running

[Bilo]

screen:blit(=210, 1, "monopoly")

that should be

screen:blit(210, 1, monopoly)

[MagicianFB]

Originally Posted by cools

well im working on something extremely minor, but it wont load. I keep getting an error.

System.usbDiskModeActivate()
black = Color.new(0, 0, 0)
monopoly = Image.load("monopolyboard2.png")
screen:blit(=210, 1, "monopoly")
screen:flip()
screen:print(272, 1, "Monopoly Board", black)
screen.flip()
while true do
screen.waitVblankStart()
end

There's an unnecessary "=" when you blit the image.

[cools]

Bilo screen:blit(=210, 1, "monopoly")

that should be

screen:blit(210, 1, monopoly)

I tried that and i got

error: index.lua:4: bad argument #2 to 'blit' (Image expected, got s
tring)

[MagicianFB]

Originally Posted by cools

I tried that and i got

error: index.lua:4: bad argument #2 to 'blit' (Image expected, got s
tring)

monopoly shouldn't be in quotes.

[cools]

Thank You I have finally got it to load where I want IT!!!

[Bilo]

Originally Posted by cools

I tried that and i got

error: index.lua:4: bad argument #2 to 'blit' (Image expected, got s
tring)

I said it shouldn't be in quotes.

If you look at what I posted.

[cools]

im sorry that is my mistake...

[Bilo]

lol, it's alright mate, don't be sorry

Hope your scriptin's going well

[Virtue]

Can anyone explain how to make a Lua program availible to boot outside Lua? Like with an ebbot, so its in the list of games on the Memory Stick? Thanks!

[Bilo]

Pull the eboot's from another lua app.

Then edit the eboot in the (%) folder to change the icon/name.

Thats it.

There's probably a different way but this way works.

[MagicianFB]

Originally Posted by Virtue

Can anyone explain how to make a Lua program availible to boot outside Lua? Like with an ebbot, so its in the list of games on the Memory Stick? Thanks!

Do you mean like Lowser?