Lua Programming Help Thread

[pspfreak9]

Did you search for some functions. THeres probaly one to blit an image at an angle.

Ok heres my questinos
I want to open a text file and print the whole file to the screen ie if the text file contains

aslkdfjaoidnfaoijdfoiajfo ;ia
dfiojasoifjaodijfoaijd;fi asjf

i want the psp to say that too. on all the lines. how would i do that?

Ummm.. there is 2 ways you could do this.
1) Take some of the code from Snake you know from the Lua Player ;)

2) Use some of HarleyG's tuts (there in C you have to convert them to Lua script)
I would go with snake cause there is no conversion. But here is the link to HarleyG's tuts.
http://www.psp-programming.com/forum...sg2555#msg2555

-= Double Post =-
And i think it is possible to read more than one line cause ive seen some text editors......

[yaustar]

Guys, I've tried everything, and I'm stuck.

This maybe a weird question, but is there any way i could blit an image at an angle with having to make about 360 pictures of the same car facing in different directions?

Eg. this number 9 is my car

'9'

If i wanted to flip it veritcally, (or any other direction) it would look like this:

,6,

So, from the one image, how would i do this in lua?

You can only do that using the GU..

[Grimfate126]

You can only do that using the GU..

sceGumRotateX() i think.

anyway, there was a rotation snippet for lua, but its really slow, and moves the image itself. so yeah.

your best bet it to learn C/C++ ans use oslib.

[yaustar]

sceGumRotateX() i think.

anyway, there was a rotation snippet for lua, but its really slow, and moves the image itself. so yeah.

your best bet it to learn C/C++ ans use oslib.

Shouldn't it be around the Z axis (as long the Z axis is pointing into the screen)

[TacticalPenguin]

Actually I believe the function is Gum.rotateXYZ(number,numb er,number)

[GuitarGod1134]

Can someone help. I get an error saying loop is ingettable or not gettable (if thats a word) at line 32. Also it may contain more errors lol.

Spoiler for Siege RPG:

--Siege RPG 
--By GuitarGod
--basically this is an rpg where your objective
-- is to destroy the castle

--lets define some colors.
red = Color.new(255,0,0)

--load all the pics
arrow = Image.load("pics/arrow.png")
battleground = Image.load("pics/battleground.png")
boulder = Image.load("pics/boulder.png")
ram = Image.load("pics/ram.png")


--some variables for health
--health for you
yourhealth = 100
--castles health
castlehp = 100

--whos turn?
currentturn = "player"

--attack selector variable
selector = 1


while true do

--blit the whole area
screen:blit(0,0,battleground.png)

--print castles hp
screen:print(380,8,"Castle HP ="..castlehp,red)

--print your hp
screen:print(10,180,"Army HP = "..yourhealth,red)

--print the current turn
screen:print(210,17,"Current turn ="..currentturn,red)

--controls
pad = Controls.read()

--print the different attacks you have
screen:print(11,14,"Battering Ram",red)
screen:print(11,20,"Archers",red)
screen:print(11,25,"Catapult",red)

--now for the selector
if selector == 1 then
screen:print(30,14,"<--",red)
end
if selector == 2 then
screen:print(30,20,"<--",red)
end
if selector == 3 then
screen:print(30,25,"<--",red)
end

--move the selector
if pad:up() then 
selector = selector - 1
end
if pad:down() then
selector = selector + 1
end

--if it reaches the end of the selections
if selector == 0 then
selector = 3
end
if selector == 4 then
selector = 1
end

--player attacks
if currentturn == "player" and selector == 1 and pad:cross() then
screen:blit(345,233,ram)
castlehp = castlehp - math.random(1,7)
currentturn = "comp"
end

if currentturn == "player" and selector == 2 and pad:cross() then
screen:blit(276,99,arrow)
castlehp = castlehp - math.random(1,2)
currentturn = "comp"
end

if currentturn == "player" and selector == 3 and pad:cross() then
screen:blit(295,15,boulder)
castlehp = castlehp - math.random(5,10)
end

--comp attacks
if currentturn == "comp" and math.random(1,2) == 1 then
screen:blit(56,228,arrow)
yourhealth = yourhealth - math.random(1,2)
currentturn = "player"
end

if currentturn == "comp" and math.random(1,2) == 2 then
screen:blit(56,228,boulder)
yourhealth = yourhealth - math.random(5,10)
currentturn = "player"
end

--all done
screen:clear()
screen.waitVblankStart()
screen.flip()
end

[TacticalPenguin]

screen:blit(0,0,battlegro und.png)

Needs to be

screen:blit(0,0,battlegro und)

[GuitarGod1134]

ok now when i run it its just a black screen but i get no errors.

[Grimfate126]

Actually I believe the function is Gum.rotateXYZ(number,numb er,number)

well, i was talking about the C function. also, you dont have to change all 3 axes. you can also just do one axis. like:

sceGumRotateX()
sceGumRotateY()
sceGumRotateZ()

(convert that to lua)
-= Double Post =-

Shouldn't it be around the Z axis (as long the Z axis is pointing into the screen)

ah, yes, thats true. i totally ignored the Z axis for some reason. but that makes total sense.
-= Double Post =-

Can someone help. I get an error saying loop is ingettable or not gettable (if thats a word) at line 32. Also it may contain more errors lol.

Spoiler for Siege RPG:

--Siege RPG 
--By GuitarGod
--basically this is an rpg where your objective
-- is to destroy the castle

--lets define some colors.
red = Color.new(255,0,0)

--load all the pics
arrow = Image.load("pics/arrow.png")
battleground = Image.load("pics/battleground.png")
boulder = Image.load("pics/boulder.png")
ram = Image.load("pics/ram.png")


--some variables for health
--health for you
yourhealth = 100
--castles health
castlehp = 100

--whos turn?
currentturn = "player"

--attack selector variable
selector = 1


while true do

--blit the whole area
screen:blit(0,0,battleground.png)

--print castles hp
screen:print(380,8,"Castle HP ="..castlehp,red)

--print your hp
screen:print(10,180,"Army HP = "..yourhealth,red)

--print the current turn
screen:print(210,17,"Current turn ="..currentturn,red)

--controls
pad = Controls.read()

--print the different attacks you have
screen:print(11,14,"Battering Ram",red)
screen:print(11,20,"Archers",red)
screen:print(11,25,"Catapult",red)

--now for the selector
if selector == 1 then
screen:print(30,14,"<--",red)
end
if selector == 2 then
screen:print(30,20,"<--",red)
end
if selector == 3 then
screen:print(30,25,"<--",red)
end

--move the selector
if pad:up() then 
selector = selector - 1
end
if pad:down() then
selector = selector + 1
end

--if it reaches the end of the selections
if selector == 0 then
selector = 3
end
if selector == 4 then
selector = 1
end

--player attacks
if currentturn == "player" and selector == 1 and pad:cross() then
screen:blit(345,233,ram)
castlehp = castlehp - math.random(1,7)
currentturn = "comp"
end

if currentturn == "player" and selector == 2 and pad:cross() then
screen:blit(276,99,arrow)
castlehp = castlehp - math.random(1,2)
currentturn = "comp"
end

if currentturn == "player" and selector == 3 and pad:cross() then
screen:blit(295,15,boulder)
castlehp = castlehp - math.random(5,10)
end

--comp attacks
if currentturn == "comp" and math.random(1,2) == 1 then
screen:blit(56,228,arrow)
yourhealth = yourhealth - math.random(1,2)
currentturn = "player"
end

if currentturn == "comp" and math.random(1,2) == 2 then
screen:blit(56,228,boulder)
yourhealth = yourhealth - math.random(5,10)
currentturn = "player"
end

--all done
screen:clear()
screen.waitVblankStart()
screen.flip()
end

first, change line 32 to what tactical said. then, move the screen:clear() to the top of your while true do. why? because, when you have it at the bottom, the program draws everything in your loop, then when it gets to the very end, it sees the screen:clear() and clears the entire screen to black. (which is the default color.) thus, you see nothing. have your loop like this:

while true do
screen:clear()

-- all the drawing/pad/other stuff --

screen.waitVblankStart()
screen.flip()
end

should work.

[Highsight]

I am trying to add music to my game PSPOmok. It sounds great untill I get to the actual game, then it starts to get laggy, and sounds bad. It gets worse as you add more and more pieces. Does somone know a way I may be able to get it to sound better? They are XM files BTW.

[pspfreak9]

Convert your Xm to MP3 ;)

[GuitarGod1134]

thanks grimfate ill try that.
-= Double Post =-

uhmm need some help how to make a pad that make two buttons make one function
pad = Controls.read()
if pad:cross() then
break
end

thanks

If your asking the question I think you are then you need to use an "and" like

pad = Controls.read()
if pad:cross() and pad:square() then
break
end

Or whatever function you want.
-= Double Post =-
In my game when I use a weapon the weapon blits for like a millasecond because its in "if" statements. Is there anyway I can make it blit longer??
Heres my source

Spoiler for Siege RPG:

--Siege RPG 
--By GuitarGod
--basically this is an rpg where your objective
-- is to destroy the castle

--lets define some colors.
red = Color.new(255,0,0)

--load all the pics
arrow = Image.load("pics/arrow.png")
battleground = Image.load("pics/battleground.png")
boulder = Image.load("pics/boulder.png")
ram = Image.load("pics/ram.png")


--some variables for health
--health for you
yourhealth = 100
--castles health
castlehp = 100

--whos turn?
currentturn = "player"

--attack selector variable
selector = 1


while true do
--keep the screen refresed
screen:clear()

--blit the whole area
screen:blit(0,0,battleground)

--print castles hp
screen:print(380,8,"C HP = "..castlehp,red)

--print your hp
screen:print(11,181,"Army HP = "..yourhealth,red)

--print the current turn
screen:print(210,17,"Current turn = "..currentturn,red)

--controls
pad = Controls.read()

--print the different attacks you have
screen:print(11,14,"Battering Ram",red)
screen:print(11,22,"Archers",red)
screen:print(11,31,"Catapult",red)

--now for the selector
if selector == 1 then
screen:print(120,14,"<--",red)
end
if selector == 2 then
screen:print(120,22,"<--",red)
end
if selector == 3 then
screen:print(120,31,"<--",red)
end

--move the selector
if pad:up() then 
selector = selector - 1
end
if pad:down() then
selector = selector + 1
end

--if it reaches the end of the selections
if selector == 0 then
selector = 3
end
if selector == 4 then
selector = 1
end

--player attacks
if currentturn == "player" and selector == 1 and pad:cross() then
screen:blit(345,233,ram)
castlehp = castlehp - math.random(1,7)
currentturn = "comp"
end

if currentturn == "player" and selector == 2 and pad:cross() then
screen:blit(276,99,arrow)
castlehp = castlehp - math.random(1,2)
currentturn = "comp"
end

if currentturn == "player" and selector == 3 and pad:cross() then
screen:blit(295,15,boulder)
castlehp = castlehp - math.random(5,10)
end

--comp attacks
if currentturn == "comp" and math.random(1,2) == 1 then
screen:blit(56,228,arrow)
yourhealth = yourhealth - math.random(1,2)
currentturn = "player"
end

if currentturn == "comp" and math.random(1,2) == 2 then
screen:blit(56,228,boulder)
yourhealth = yourhealth - math.random(5,10)
currentturn = "player"
end

--all done
screen.waitVblankStart()
screen.flip()
end

-= Double Post =-
In my game when I use a weapon the weapon blits for like a millasecond because its in "if" statements. Is there anyway I can make it blit longer??
Heres my source

Spoiler for Siege RPG:

--Siege RPG 
--By GuitarGod
--basically this is an rpg where your objective
-- is to destroy the castle

--lets define some colors.
red = Color.new(255,0,0)

--load all the pics
arrow = Image.load("pics/arrow.png")
battleground = Image.load("pics/battleground.png")
boulder = Image.load("pics/boulder.png")
ram = Image.load("pics/ram.png")


--some variables for health
--health for you
yourhealth = 100
--castles health
castlehp = 100

--whos turn?
currentturn = "player"

--attack selector variable
selector = 1


while true do
--keep the screen refresed
screen:clear()

--blit the whole area
screen:blit(0,0,battleground)

--print castles hp
screen:print(380,8,"C HP = "..castlehp,red)

--print your hp
screen:print(11,181,"Army HP = "..yourhealth,red)

--print the current turn
screen:print(210,17,"Current turn = "..currentturn,red)

--controls
pad = Controls.read()

--print the different attacks you have
screen:print(11,14,"Battering Ram",red)
screen:print(11,22,"Archers",red)
screen:print(11,31,"Catapult",red)

--now for the selector
if selector == 1 then
screen:print(120,14,"<--",red)
end
if selector == 2 then
screen:print(120,22,"<--",red)
end
if selector == 3 then
screen:print(120,31,"<--",red)
end

--move the selector
if pad:up() then 
selector = selector - 1
end
if pad:down() then
selector = selector + 1
end

--if it reaches the end of the selections
if selector == 0 then
selector = 3
end
if selector == 4 then
selector = 1
end

--player attacks
if currentturn == "player" and selector == 1 and pad:cross() then
screen:blit(345,233,ram)
castlehp = castlehp - math.random(1,7)
currentturn = "comp"
end

if currentturn == "player" and selector == 2 and pad:cross() then
screen:blit(276,99,arrow)
castlehp = castlehp - math.random(1,2)
currentturn = "comp"
end

if currentturn == "player" and selector == 3 and pad:cross() then
screen:blit(295,15,boulder)
castlehp = castlehp - math.random(5,10)
end

--comp attacks
if currentturn == "comp" and math.random(1,2) == 1 then
screen:blit(56,228,arrow)
yourhealth = yourhealth - math.random(1,2)
currentturn = "player"
end

if currentturn == "comp" and math.random(1,2) == 2 then
screen:blit(56,228,boulder)
yourhealth = yourhealth - math.random(5,10)
currentturn = "player"
end

--all done
screen.waitVblankStart()
screen.flip()
end

[Highsight]

Convert your Xm to MP3 ;)

I didn't think LUA Played MP3s. o_O Are you sure it does?

[pspfreak9]

Yes of course it does

[Highsight]

Just tried it, didn't work. LUA does not read MP3s. :/

[pspfreak9]

What!!!! Huh how did you convert it??
-= Double Post =-
Oh wait sorry my mistake it plays WAV files try converting it to that
-= Double Post =-
Sorry about that i was was thinking of C ;)

[TacticalPenguin]

Actually with the luaplayer mod by cools it can.

[Highsight]

Actually with the luaplayer mod by cools it can.

Well, I don't want to waste my time recoding everything twice only to find out it didn't make it faster. So are you sure that if I use the mod to run MP3s instead of XMs, the music will run smoother? :/

[EminentJonFrost]

Here is a useful post from Zion, creator of Linken's Quest, that teaches you how to make your game able to run in XMB:
http://www.psp-hacks.com/forums/about40812.html

just thought this was helpful and decided to post it up. :)

[gameo]

Hi everyone!

I'm currently working on LuaMM or LuaMusicMaker.

Right now its just a couple of mp3 sounds, which you can play at the same time.

But i need to know:

How do i load more than one mp3 sound?

It just says:

Mp3.load("my file goes here.mp3")

And Mp3.play()

How do i create more variables with it?

Sorry im not so experienced in lua...

[EminentJonFrost]

try thinking of it as an image sorta.
photo = Image.load(blahblah)
music = Mp3.load(blahblah)
edit - hehe i dont know how i double posted...

[gameo]

Allright, that helped! Thx!
-= Double Post =-
Wait... now it gives me an error.

I'll just post my main script.

--Colors

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

--Loading

screen.waitVblankStart(60 )

screenrint(194, 136, "Loading Images...", white)
screen.flip()

background = Image.load("bg.png")

screen:clear()
screenrint(194, 136, "Done.", white)
screen.flip()

screen.waitVblankStart(40 )

screen:clear()
screenrint(194, 136, "Loading Sounds...", white)
screen.flip()

Guitar = Mp3.load("guitar.mp3")

Guitar2 = Mp3.load("guitar2.mp3")

Drum = Mp3.load("drum.mp3")

screen:clear()
screenrint(194, 136, "Done.", white)
screen.flip()

screen.waitVblankStart(40 )

screen:clear()
screenrint(194, 136, "Loading LuaMM", white)
screen.flip()

screen.waitVblankStart(60 )

screen:clear()
screen:blit(0, 0, background, false)
screen.flip()

oldpad = Controls.read()

while true do

pad = Controls.read()

if pad:cross() then
Guitarlay()
end

if pad:circle() then
Guitar2lay()
end

if pad:triangle() then
Drumlay()
end

if pad:start() then
break
end
oldpad=pad
end

The error says: "attempt to index global "drum" (a nil value)

And it says that with drum, guitar, and guitar2.

[GuitarGod1134]

Then your variables are not being loaded correctly. Check the directories and all that stuff and make sure your loading them right.

[psp11]

And you can also get rid of that screen.waitVblankStart(60 ) in the beginning of your code. It is pointless to have that there.

[gameo]

I have it to make the loading a little serious... else you wont reach to see anything.

But the problem is, there is NO error! I don't know why it says so.

[SG57]

Guitargod - Somehow I think it wouldve told him it couldnt find/load the MP3 when loading it, not playing it *rolls eyes*

gameo - I havent messede with the MP3 capable Lua Player library before, but Im positive a sound effect, such as a drum or guitar, should be played using the Sound System (WAV). Convert the MP3's to WAV, get a good sound + good size, and do a simple:

guitar = Sound.load("guitar.wav")

...

guitar:play()

Oh and your doing that whole oldpad new pad thing pretty obviously wrong ('pad' isnt even being manipulated at all...)

[gameo]

Guitargod - Somehow I think it wouldve told him it couldnt find/load the MP3 when loading it, not playing it *rolls eyes*

gameo - I havent messede with the MP3 capable Lua Player library before, but Im positive a sound effect, such as a drum or guitar, should be played using the Sound System (WAV). Convert the MP3's to WAV, get a good sound + good size, and do a simple:


Code:
guitar = Sound.load("guitar.wav")

...

guitarlay()Oh and your doing that whole oldpad new pad thing pretty obviously wrong ('pad' isnt even being manipulated at all...)

I did that when i was using LuaPlayer v0.18.
They gave me the error: ERROR Loading sound.

So i started on Luaplayer v0.20 and converted them to Mp3's.

[GuitarGod1134]

Ok ok . gosh just made that guess by the look of his erros. and besides mp3's are usually used for background music not really for game sounds. theres another way to load wav files it says in evilmana. did u try that way?

Spoiler for What evilmana has to say..:

Let's learn a few more commands now. The next command will play the file. Use the name of the variable you used to load your sound. Like this:

bonkSoundlay()

I do not recommend using this way to play the file however. This can lead to a common error which will mention something along the lines of "loop ingettable". Here's how I would play my file. The only thing you would need to change from this code is the bonkSound if you used a different variable.

local sound = bonkSound
voice = soundlay()

To stop the sound use:

voice:stop()

We can also use a command as we did with the music commands to see if the sound is playing. This command is:

voicelaying()

http://evilmana.com/tutorials/lua_tutorial_10.php

[gameo]

A little more confusing, but i may just try that...

[Nicko01]

Hi, I need help with my highscore saving code. I have a file called scorefile in the same directory as this file is:


function saveHighscore()
file = io.open(scorefile, "w")
if file then
file:write(score[1].s1)
file:close()
end
end

function loadHighscore()
file = io.open(scorefile, "r")
if file then
oldhigh = file:read("*n")
file:close()
end
end


I have this code too:

if score[1].s1 > oldhigh then
saveHighscore()
end

I get the error:

Error: level1.lua:112: bad argument #1 to 'open' (string expected, got nil)

Thanks,
Nicko01