Lua Programming Help Thread

Zitat:

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Zitat von lui2603

ok how about have

buttonpressed = "none"

if pad:l() then
buttonpressed = "l"
end
if pad:r() then
buttonpressed = "r"
end
if pad:r() and pad:l() then
buttonpressed = "randl"
end

if buttonpressed=="l" then
*do dance for l*
end
if buttonpressed=="r" then
*do dance for r*
end
if buttonpressed=="randl" then
*do dance for randl*
end

not sure if that would work.. but give it a try

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and in which lies the problem. The backs of my stick figures are transparent so when I press 2 buttons at a time, you can see parts of the other stick figure underneath. I need a way to make it so that when I press 2 buttons at a time, one of then dissapears. Here's the code i used. It says "then expected near =" what does that mean?
EDIT: sorry didn't see tour new post. Yes. That was stupid of me to not notice that. I will be back.

Code:

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if lw = "true" then
screen:blit(198, 40, l)
end

if pad:l() then
lw = "true"

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Ooh I just noticed that you a blitting each image seperatley, what I would do is use a table which has all of the images in.. like

stick = {}
stick[1] = Image.load("xdance.png")
stick[2] = Image.load("odance.png")
--and so on... then put...
stickimage = stick[1] --or whatever the starting image will be

--when you want it to change you would do
pad = Controls.read()
if pad:circle() then
stickimage = stick[2]
end

--Then you only have to blit the image at the end of the code.

screen:blit(0, 0, background)
screen:blit(x, y, stickimage)
screen.flip()
screen.waitVblankStart()



Doing it this way will also stop you from seeing 2 images at once because there will only be one image blitted at anyone time...

Anyway I'm now going to sleep so good luck with getting it sorted! Seeya

Zitat:

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Zitat von lui2603

Ooh I just noticed that you a blitting each image seperatley, what I would do is use a table which has all of the images in.. like

stick = {}
stick[1] = Image.load("xdance.png")
stick[2] = Image.load("odance.png")
--and so on... then put...
stickimage = stick[1] --or whatever the starting image will be

--when you want it to change you would do
pad = Controls.read()
if pad:circle() then
stickimage = stick[2]
end

--Then you only have to blit the image at the end of the code.

screen:blit(0, 0, background)
screen:blit(x, y, stickimage)
screen.flip()
screen.waitVblankStart()



Doing it this way will also stop you from seeing 2 images at once because there will only be one image blitted at anyone time...

Anyway I'm now going to sleep so good luck with getting it sorted! Seeya

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sorry. I think you're misunderstanding. the images have transparent backs, see through. So the only way to get tit to only show one is to remove the otehr one. someone please help! To help understand what I'm working on try the Stick Dance in my signature. Here's some code that I am having trouble with.

Code:

---

lw = "false"
if lw == "true" then
screen:blit(198, 40, l)
end

if pad:l() then
lw = "true"
end

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when i do that, the image doesn't even show up. Can someone help me fix this?

well you're setting lw to false so it never has a chance to change to anything else. Initialize it to false outside your loop.

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Zitat von matriculated

well you're setting lw to false so it never has a chance to change to anything else. Initialize it to false outside your loop.

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ok I took it out of my loop and the pic appeared but it stays there frozen. What's the problem?
EDIT: awww no! When I press L the picture flashes white for a millisecond. what the heck is wrong?

ya i put in my backround and this is what loads:


http://img153.imageshack.us/img153/7...uble0mb.th.png

i dont know whats wrong. it is a .png.. and is there anything else that could be wrong? maybe too big of a file size...altho its only 97 kb?

Zitat:

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Zitat von hooger

ya i put in my backround and this is what loads:


http://img153.imageshack.us/img153/7...uble0mb.th.png

i dont know whats wrong. it is a .png.. and is there anything else that could be wrong? maybe too big of a file size...altho its only 97 kb?

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post the original picture. mabye the dimesions are worng.

ok here it is

http://img205.imageshack.us/img205/6...und18gc.th.png

what is wrong with...

Code:

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Currentplayer = {}
Currentplayer[1] = {Player[cc].px = x1, Player[cc].py = y1}

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i get an error that says it expects a ) near =

hi i want to make a side scrolling type of game.. im new to lua how would i do this for the background? make one huge long one?? a bunch of background?

thanks

Zitat:

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Zitat von hooger

ok here it is

http://img205.imageshack.us/img205/6...und18gc.th.png

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i dunno.. the image looks fine.ask teamoverlord. BTW: check ur PM's

I would suggest a picture that can loop as in if you put it parallel to itself it will look like it is just longer. Since you are a beginner I suggest just a flat surface.

EDIT: oh and by the way everyone, I messed around for an entire day and finally fixed my problem. I just need to code TONS of stuff now. Stick Dance V2 will be done by monday! :icon_wink

Zitat:

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Zitat von Greenskull

sorry. I think you're misunderstanding. the images have transparent backs, see through. So the only way to get tit to only show one is to remove the otehr one. someone please help! To help understand what I'm working on try the Stick Dance in my signature. Here's some code that I am having trouble with.

Code:

---

lw = "false"
if lw == "true" then
screen:blit(198, 40, l)
end

if pad:l() then
lw = "true"
end

---

when i do that, the image doesn't even show up. Can someone help me fix this?

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Greenskull I do understand completley! Using a table will only show 1 image at a time because the table is that image...

Nope he's right. If you press another button with another button then it blits another image over it. I would have used a table though and then I would've done this: Everytime a button is pressed it stores a unique value in a variable. Lets say 1 for cross, 2 for circle, 3 for triangle,etc. This goes all in the same variable. At the bottom of the controls you say:
"screen:blit(x,y, pictures[var])"
Where var is that variable. This way it only blits the last button you pushed.

Zitat:

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Quote:
Originally Posted by Altair
why not just do "screen:clear()"?


Thanks PSPMillionaire! You are a life saver! And to Altair, Screen:clear gets rid of everyhting on the screen including the background.

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Well duh! Im just asking why you don't want the entire screen to clear, its way easier.

have another problem. i tried to make the dude transparent to go with the backround and this happened

http://img484.imageshack.us/img484/4...tled6il.th.png

all i did was use photoshop to get rid of the white and make it transparent.

can somebody tell me a way to get a random number, between 1, 5, but not math.random as it just always turns out as 1?
thanks

Zitat:

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Zitat von Altair

Well duh! Im just asking why you don't want the entire screen to clear, its way easier.

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because if you have a game like Stick Dance, screen.clear messes it up because it removes all text, backgrounds, pictures etc.

Zitat:

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Zitat von Altair

Nope he's right. If you press another button with another button then it blits another image over it. I would have used a table though and then I would've done this: Everytime a button is pressed it stores a unique value in a variable. Lets say 1 for cross, 2 for circle, 3 for triangle,etc. This goes all in the same variable. At the bottom of the controls you say:
"screen:blit(x,y, pictures[var])"
Where var is that variable. This way it only blits the last button you pushed.

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I found another way to do it. I did TONS of "if blah == true then" statements. It all works out. Thanks for the help though! EDIT: scratch that. It works on the PC Lua player but on PSP theres still a flash. I believe it's because it can't load fast enough. I need this darn problem fixed!

im working on my first little app, and i was wondering what is the lua input code for the music note button and/or that screen button(those two small buttons beside the select button)

i would also like to know if their is a code for any movement of the analog stick(doesnt need a certain direction, just need to touch it)

thanks for any help

Zitat:

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Zitat von Sousanator

im working on my first little app, and i was wondering what is the lua input code for the music note button and/or that screen button(those two small buttons beside the select button)

i would also like to know if their is a code for any movement of the analog stick(doesnt need a certain direction, just need to touch it)

thanks for any help

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if you wish a button play music, then put:

Zitat:

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if pad:"button"() and
oldpad:"button"() ~= pad:"button"() then
"sound":play()
end
end

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obviously, where the button is cross, you put cross, or where the button is circle, change "button" to circle.
also, at the beginning you will need to load your sound by doing:

Zitat:

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"sound = Sound.load("sound.wav",fa lse)

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hope it helps.
ok, now that's out the way, i got a small problem too. i now want my app to do something when i press a button.
i want it to change the background. i can make it display the new background, but the old one doesn't disapear, and the near one flashes very quickly. what do i have to add or take away?
i'm using s==1 for the initial background, and s==2 for the new background.

edit: just figured it out! i had one too many vblanks.

no, i don't mean that,, i mean if i wanted the music note button(the one beside the select button) to play music or do something,,

same with the button beside the music note button,, are they in lua?

Code:

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Controls.read():note()
and
Controls.read():home()

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It's easier to first make Controls.read()= pad so that you can just do

Code:

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pad:home() and pad:note()

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Zitat:

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Zitat von ro0kie42

what is wrong with...

Code:

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Currentplayer = {}
Currentplayer[1] = {Player[cc].px = x1, Player[cc].py = y1}

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i get an error that says it expects a ) near =

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please help...

Zitat:

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Zitat von PSPHax0r9

Code:

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Controls.read():note()
and
Controls.read():home()

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It's easier to first make Controls.read()= pad so that you can just do

Code:

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pad:home() and pad:note()

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i tryed both ways, but they dont work me,,
i just want the music note to do something, just like if you pressed x,,

like for the x it would be

if pad:cross() then
sound1:play()
end

so would i do the music note button like this?

if pad:note() then
sound2:play()
end

thanks for help so far

Yea those should work.

Ok I need someone to look at my code that is experienced in Lua. Preferably a Developer. I need them to help fix a bug. Thanks.

Zitat:

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Zitat von PSPHax0r9

Yea those should work.

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unfortunatly the note doesnt work, the cross works fine though

is it sopposed to look like this above it

pad = Controls.read()
pad:note()

or something else?

Zitat:

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Zitat von Greenskull

Ok I need someone to look at my code that is experienced in Lua. Preferably a Developer. I need them to help fix a bug. Thanks.

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Greenskull, this isn't about the bug but about the transparent images thing, I use transparent images in every LUA thing I make and I know that I want them to change later on in the game so I put them in the table... Doing that is alot easier than the method you used for stickdance...
I don't know if you misunderstood what I meant before about putting the images in a table, I just noticed that you were blitting each image seperatley so I was just saying if you were going to make another game which needs the images to change you should think about doing it that way. It means you only have to blit the one image which keeps changing...

Zitat:

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Zitat von lui2603

Greenskull, this isn't about the bug but about the transparent images thing, I use transparent images in every LUA thing I make and I know that I want them to change later on in the game so I put them in the table... Doing that is alot easier than the method you used for stickdance...
I don't know if you misunderstood what I meant before about putting the images in a table, I just noticed that you were blitting each image seperatley so I was just saying if you were going to make another game which needs the images to change you should think about doing it that way. It means you only have to blit the one image which keeps changing...

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too late for that. Someone, anyone, please help me with my problem!

hey greenskull

what program did u use to convert mp3 to .wav?

cuz none of mine work.

Zitat:

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Zitat von hooger

hey greenskull

what program did u use to convert mp3 to .wav?

cuz none of mine work.

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http://www.dbpoweramp.com/dmc.htm

Is there a different way of saying no buttons pressed? and is there a way of saying "or" in Lua?

thx man

Is there any way to get larger files to play in LUA? The music management sucks because the only WAV compression it supports is PCM, whcih actually makes the file bigger than the original MP3. It doesn't support ACM compression, which sucks. Does playing a file as "music"(give a larger allotment then a sound file(wav)?

even with his program he gave me i cant get it to work.... maybe cuz im using downloaded mp3 songs..

Zitat:

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Zitat von PSPHax0r9

Is there any way to get larger files to play in LUA? The music management sucks because the only WAV compression it supports is PCM, whcih actually makes the file bigger than the original MP3. It doesn't support ACM compression, which sucks. Does playing a file as "music"(give a larger allotment then a sound file(wav)?

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I doubt that it matters. It will probably just play the same thing.

you can use the or button, or you could use the < > symbols. i don't know how to use them, but i think you can do it. you could assign each button a symbol like

cross=1
circle = 2
triangle =3
if (button pressed) =<3 > 1 then play

this would mean if you pressed circle or triangle it would play. i'm not saying thats right, but it's along the lines...
i got a problem myself. is there something in lua which knows how long the button is pressed for. so, if you press and hold a button, the sound keeps playing until the button is let go?

Zitat:

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Zitat von hooger

even with his program he gave me i cant get it to work.... maybe cuz im using downloaded mp3 songs..

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I know why, when you are online, ill tell you on MSN.

Let me rephrase my question. Is there any way to get a large sound file to play in LUA? And what is the maximum size allowed?