Lua Programming Help Thread

[Nava]

I'm a little lost. What exactly are you trying to do? You want it to display one message whilst X isn't being held, and another whilst X is being held? Also, if so, why exactl yisn't it working, what's happening instead?

No, I want it so that all I have to do is press X and it shows a different text.

So say this is my menu.

Menu Items:
1.Say yes (when selected with X prints "Yes")
2.Say no (when selected with X prints "No")
3.Exit (exits the program obviously)

Now, what im having trouble with is, when I select option 1 with X I have to hold X for the message "Yes" to stay on the screen. If i just press X the message "Yes" only stays on the screen for as long as I hold X.

What im trying to accomplish, is when I press X I want the new message of "Yes" to stay on screen till say I press O or something, i dont know yet. But I do know that i dont want to have to hold X for the message to stay on screen.

Get what im saying lol, its kind of hard to explain.

[_df_]

I'll bet your in a loop, and at the top of the loop is a screen clear, so when you hold X, its really clearing + displaying really quickly...

but since you dont post any code we cant be sure...

[TurtlesPwn]

I'm a little lost. What exactly are you trying to do? You want it to display one message whilst X isn't being held, and another whilst X is being held? Also, if so, why exactl yisn't it working, what's happening instead?

Also, on a different note, I wanted to ask if there is any way I could fade from one image to another in lua? I know how to fade an image out to black, and then the next in, but is there no way I could do it straight from one to another? Thanks in advance.

To your question: Yes, talk to me on msn for various methods
To original question:

displayText = false
while true do
    screen:clear(Color.new(255,255,255))
    oldpad = pad
    pad = Controls.read
    if pad:cross() and not oldpad:cross() then
        displayText = not displayText
    end
    if displayText then
        screen:print(0,0,"Text is on")
    end
    screen.waitVblankStart()
    screen.flip()
end

[Nava]

talk to me on msn for various methods

Well it seems that I will have to make a msn s/n, so I can get more help from you in the future if I need it :)

I have yet to try your bit of code out but im sure it will help me lots :)

Thanks :)

[Nava]

Well, that bit of code works but it doesnt work. Ill let you see for yourself whats going on while its being run.

Note:You will see that with what I have in my code I am still experimenting with Lua, as I amstill learning, so bear with me if some of my choices in the menu dont make sense.
Also, if your trying to run this code, put an image named image.jpg in the same folder as this .lua or it wont load properly.

image = Image.load("image.jpg")
red = Color.new(255,0,0)
black = Color.new(0,0,0)
white = Color.new(255,255,255)
menustatus = 1
while true do
screen:clear(black)
pad = Controls.read()
if pad:up() then
menustatus = menustatus - 1
screen.waitVblankStart(4)
end
if pad:down() then
menustatus = menustatus + 1
screen.waitVblankStart(4)
end
color={white, white, white, white, white, white}
color[menustatus]=red
screen:print(50, 50, "Display Text", color[1])
screen:print(50, 60, "Info", color[2])
screen:print(50, 70, "Display Image", color[3])
screen:print(50, 80, "Screen Lock", color[4])
screen:print(50, 90, "Test", color[5])
screen:print(50, 100, "Exit", color[6])
if menustatus == 1 then
    if pad:cross() then
    screen:clear(black)
    screen:print(50, 50, "Hey it worked!", color[1])
    end
end
if menustatus == 2 then
    if pad:cross() then
    screen:clear(black)
    screen:print(50, 50, "Created by Nava -C- 2008", red)
    end
end
if menustatus == 3 then
    if pad:cross() then
    screen:blit(0,0,image)
    end
end
if menustatus == 4 then
    if pad:cross() then
    screen:clear(black)
    screen:print(50, 50, "Can you figure out the password?", red)
    end
end
if menustatus == 5 then
    while true do
    displayText = false
    oldpad = pad
    pad = Controls.read()
    if pad:cross() and not oldpad:cross() then
        displayText = not displayText
    end
    if displayText then
        screen:print(50,50, "Hey it worked!", red)
    end
    screen:waitVblankStart()
    screen:flip()
    end
end
if menustatus <= 0 then
menustatus = 6
end
if menustatus >= 7 then
menustatus = 1
end
screen.flip()
screen.waitVblankStart()
end

[dan369]

screen:clear() is defaulted to clear black, you don't really need that Or the created color unless you intend to use it.

[Digikid13]

screen:clear() is defaulted to clear black, you don't really need that Or the created color unless you intend to use it.

In the new lua you have to put "screen:clear(somethi ng)" in order for it to work. "0" can be put in there for black.

[dan369]

In the new lua you have to put "screen:clear(somethi ng)" in order for it to work. "0" can be put in there for black.

Well, thats just s*** it should be defaulted, you shouldn't have to put 0, or anything. I use PGE mostly now, so i wouldn't of known that, THAT has pge.gfx.clearscreen() -- defaulted to BLACK!!!!

[TurtlesPwn]

In the new lua you have to put "screen:clear(somethi ng)" in order for it to work. "0" can be put in there for black.

In the new lua? Do you even know what lua is?

[Freshmilk]

How hard would it be for me to port an unindented 1,400-line game into PGE lua from Lua v0.16? And for the change in speed, would it be worth doing it?

[FaT3oYCG]

how complex is the code, what game is it, depends on the game.

[malliet]

Hey people, I'm stuck with my game. The coding goes perfect but I want to make a option, that pauses the game if you press start. There's a lot of action in my game so
I really do need a pause option so people can take a break, or just want to stop for a while.

I searched google but didn't find anything.

Something like this:

if pad:start() then
--Pause Game (Show An Image And Pause Game)
end

[slicer4ever]

u need to create a simple variable like so:
pause = 1;

than anything that increments simple multiply it by the pause variable
and if u want to pause:

if pad:start() then
   --thanks dan for pointing out that it's ~, instead of !
   pause ~= pause;
end

and that creates the pause state, simple do an if pause==0 then //menu here

[dan369]

Isn't '!pause' for C?
In Lua it's '~=' So it would be

 
pause ~= pause;

[slicer4ever]

sorry, haven't used lua in a long time, it's why i said for someone to correct me if i'm wrong, and it's for many other languages than just C, but it's the major one for homebrew, so yes

[malliet]

Does somebody know where I can find a sample, or post a sample?

Is this code right:

if pad:start() then
pause ~= pause;
screen:blit("0,0, pause")
end

[dan369]

sorry, haven't used lua in a long time, it's why i said for someone to correct me if i'm wrong, and it's for many other languages than just C, but it's the major one for homebrew, so yes

Thought so, using my very minimal knowledge of C.

[FaT3oYCG]

Does somebody know where I can find a sample, or post a sample?

Is this code right:

if pad:start() then
pause ~= pause;
screen:blit("0,0, pause")
end

no

[TurtlesPwn]

pause = not pause

[malliet]

I don't understand. How is the code got to be then?

[dan369]

Simple.
Say you have a boolean called pause,
then you have your if statement,

 
if press sumthing then
     pause = true
end

then another simple if statement

if pause then 
     blit watever
end

Basically if pause then do things, pause would either be true Or false. When you press say start it would make it true, then that if comes into play.
Then have another If checking e.g

 
if pad:cross()  then
    pause = not pause 
end

if pause is true & you set it to not pause (or any boolean) then it basically means the opposite, so pause would be......... (i know but i want malliet to answer, see if he understands)

[jensma]

Hi there!

Is there any way to merge the source of my lua game into the eboot.pbp? I don't want the people to complain about my style in writing games

Thanks in advance!

[slicer4ever]

from: LUA development Help

it is hard to do and not really worth it, why did you want to do it anyway, to protect your source? well you can just open the eboot in a text editor and see the source anyway, use the lua compiler if that is what you want to do.

and if you still want to do it:

*cough* my site
*cough* link:
*cough* http://gaming-network.ath.cx/Gaming-...a_compiler.rar

hopefully that helps you, and next time try to search first=-), and lastly if you manage to accompalish what you wanted to do, than don't listen to people complaining about your code, it only happens if you release something really, really pointless, and easy to do with a few lines of lua

[Nielkie]

Why don't you want people criticising your code? People don't just say "ZOMG HIS CODZ SUCK LOLOLO U SUCK!!!!!!!!!!!!!11111", most people will give you helpful suggestions and advice for improving yourself.

Besides, if you have bad code and you just bytecode your app, people will then just complain about the fact that it is bytecoded.

[jensma]

Why don't you want people criticising your code? People don't just say "ZOMG HIS CODZ SUCK LOLOLO U SUCK!!!!!!!!!!!!!11111", most people will give you helpful suggestions and advice for improving yourself.

Besides, if you have bad code and you just bytecode your app, people will then just complain about the fact that it is bytecoded.

You're no help :P

[KiNGxLeGiTx]

how do u load a .wav file in luaplayer? please help

[malliet]

how do u load a .wav file in luaplayer? please help

nameofyourfile = Sound.load("ms0:/nameofyourfile.wav")

nameofyourfile:play()

[KiNGxLeGiTx]

thanks malliet :)
-=Double Post Merge =-
well now i have a problem my psp freezes look at my code please see if anythings wrong

korn = Sound.load("Music/korn.wav")

if pad:l() then
korn:"without these quotes"play()
end

theres more code in between but these are what im haveing trouble with

[malliet]

thanks malliet :)
-=Double Post Merge =-
well now i have a problem my psp freezes look at my code please see if anythings wrong

korn = Sound.load("Music/korn.wav")

if pad:l() then
korn:"without these quotes"play()
end

theres more code in between but these are what im haveing trouble with

I don't see the problem. Which luaplayer do you use? And is your WAV file in the music map?

[KiNGxLeGiTx]

i figured out what was wrong but i still need help its my wav file i loaded up another one and it worked but i cant get my korn.wav to work