Lua Programming Help Thread

[Fuzzie360]

dofile("index.lua") should do fine but if you want the whole LUAplayer load up again then use break. Something like this:
if blahblahblah then
break
end

[Yongobongo]

Hey guys, I need help making a file browser that opens up .PNGs onto the canvas for my yPaint? Can anyone help? Thanks :)

[trex6662k5]

n2 = (lshift(string.byte(str,1 +k),4) & 0x30) + 1
LUA 5.1 really doesnt like that line, more specificly "&" ...Lexical error?
What changes would I need to do to make it run properly?

[Hedzx]

--balls by Hedzx--

-- define colors
white = Color.new(255,255,255)
red = Color.new(225,0,0)
green = Color.new(0,225,0)
blue = Color.new(0,0,225)
blocks = 0

--paddle
player = {}
player.x = 0
player.y = 260
player.width = 32

player1 = Image.createEmpty(33,2)
player1:clear(red)
--end paddle

-- ball
ball = {}
ball.x = 10
ball.y = 100
ball.state = "falling"
ball1 = Image.createEmpty(2,2)
ball1:clear(green)
--end paddle

-- block(s)
block = {}

for i = 1,1 do
block[i] = { x = i + 0, y = i + 32, pos = true}
end

blocky = Image.createEmpty(32,32)
blocky:clear(blue)

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

-- control paddle left or right
if pad:right() then
player.x = player.x + 2
end

if pad:left() then
player.x = player.x - 2
end


-- define the direction ball will fly
if ball.state == "falling" then
ball.y = ball.y + 1
end

if ball.state == "rising up" then
ball.y = ball.y - 1
end

if ball.state == "rising left" then
ball.y = ball.y - 1
ball.x = ball.x - 1
end

if ball.state == "rising right" then
ball.y = ball.y - 1
ball.x = ball.x + 1
end

if ball.state == "falling right" then
ball.y = ball.y + 1
ball.x = ball.x + 1
end

if ball.state == "falling left" then
ball.y = ball.y + 1
ball.x = ball.x - 1
end


-- define "collision" (lol) for paddle..
-- if on right it bounces right etc., etc.,

if ball.y >= player.y and ball.x > player.x and ball.x < player.x + 11 then
ball.state = "rising left"
end

if ball.y >= player.y and ball.x > player.x + 11 and ball.x < player.x + 22 then
ball.state = "rising up"
end

if ball.y >= player.y and ball.x > player.x + 22 and ball.x < player.x + 33 then
ball.state = "rising right"
end

-- wall code
if ball.x < 0 and ball.state == "rising left" then
ball.state = "rising right"
end

if ball.x > 480 and ball.state == "rising right" then
ball.state = "rising left"
end

if ball.y < 0 and ball.state == "rising up" then
ball.state = "falling"
end

if ball.y < 0 and ball.state == "rising left" then
ball.state = "falling left"
end

if ball.y < 0 and ball.state == "rising right" then
ball.state = "falling right"
end

if ball.x < 0 and ball.state == "falling left" then
ball.state = "falling right"
end

if ball.x > 480 and ball.state == "falling right" then
ball.state = "falling left"
end



-- block
if ball.y < block[1].y +32 and ball.x < block[1].x + 32 and ball.pos == "rising up" and block[1].pos ~= false then
blocks = 1
block[1].pos = false
ball.state = "falling"
elseif ball.y < block[1].y and ball.x < block[1].x + 32 and ball.pos == "rising right" and block[1].pos ~= false then
blocks = 1
block[1].pos = false
ball.state = "falling right"
elseif ball.y < block[1].y and ball.x < block[1].x + 32 and ball.pos == "rising left" and block[1].pos ~= false then
blocks = 1
block[1].pos = false
ball.state = "falling left"
end


-- end block


-- blit paddle and player
screenrint(190,100,"Balls By Hedzx", white)
screen:blit(player.x, player.y, player1)
screen:blit(ball.x, ball.y, ball1)
screenrint(0, 0,"balls broken"..blocks, green)
for a = 1,1 do
if block[a].pos ~= false then
screen:blit(block[1].x,block[1].y,blocky)
end
end

-- flip screen and wait forever.

screen.flip()
screen.waitVblankStart()
end

k im making a breakout clone but the problem is that the box doesnt seem to do anything once its hit.
also, how would i be able to make the boxes be side by side in the

block[i] = { x = i + 0, y = i + 32, pos = true}

because it just blits boxes on top of each other. any suggestionss on what to add the x by so that its next to the last block?? thanks.

[Anti-QuickJay]

Whenever i added OGG music format to my game is wouldnt load unlss it was loaded though IRShell, But when i removed it and converted it to .wav it worked, Does anyone know why?

[Fuzzie360]

Are you using lua player 0.2? You need 0.2 to load .lrx libraries. This is interesting, i'm helping AN IDIOT WHO PIRATED MY GAME. If you have copied it fully, you would have a great example of playing OGGs don't you think?

[Anti-QuickJay]

OMG, I am using .20, Look dude i dont like this, If you want i guess i can say i give you some credit, will that make you happy?
Also, I am asking this question because i didnt priated your game i made it by myslef with the help of three others

[Fuzzie360]

SOME CREDIT?!?!?? Don't you dare insult me like that. You owe me an APOLOGY.

[Grimfate126]

dude, chill out. you gonna get yourself banned. do you have PROOF (REAL PROOF) that he "pirated" your code? (the real term is "stolen", but meh.)

[yaustar]

http://forums.qj.net/f-psp-developme...ml#post1121032

I did a diff between the two dance.lua files.

[Fuzzie360]

dude, chill out. you gonna get yourself banned. do you have PROOF (REAL PROOF) that he "pirated" your code? (the real term is "stolen", but meh.)

Here's my proof: http://boardsus.playstation.com/play...=27479#M348145
Notice the date. Sorry for not 'chilling' but I am willing to take a ban for what i think is right. The real term is plagiarize actually but who cares.

[ZereoX]

Hi can som one tell me what are the degree's in the analog like up is 0 and just a bit from the left is like 360 ? can som one help i ant get the correct number for the analog to work.

[Grimfate126]

Hi can som one tell me what are the degree's in the analog like up is 0 and just a bit from the left is like 360 ? can som one help i ant get the correct number for the analog to work.

if AX() >= 100 then
--move right
end
if AX() <= -99 then
--move left
end
if AY() >= 100 then
--move up
end
if AY() <= -99 then
--move down
end

[ZereoX]

Tkz grimfate i really apreciate.

[Grimfate126]

Tkz grimfate i really apreciate.

no prob. BTW, you have to define AX and AY as:

AX = pad:analogX
AY = pad:analogY

or, you can just reaplce the AX, and the AY in the script i gave you with:

pad:analogX
pad:analogY

[trex6662k5]

n2 = (lshift(string.byte(str,1 +k),4) & 0x30) + 1
LUA 5.1 really doesnt like that line, more specificly "&" ...Lexical error?
What changes would I need to do to make it run properly?

Anyone? Im still fairly new to lua n any help will be apprieciated

[yaustar]

What are you trying to do with it?

[Grimfate126]

Anyone? Im still fairly new to lua n any help will be apprieciated

what are you programming?? youre even using byte operations! but i dont think '&' is leagal in lua. try luaplayer .20

[trex6662k5]

Thats the thing it doesnt work in luaplayer 0.20 works in others though
The line originates from here
As you can most likely tell from the function name, it converts a string to base64
The code is johnny2002's and is from Xbox media center: Remote music interface which I have been adding features to. I want to be able to use the latest luaplayer 0.20 mod but due to a "Lexical error" (Writing conventions?) I cant use it.

function encodeB64(str)
local B64 = "ABCDEFGHIJKLMNOPQRSTUVWX YZabcdefghijklmnopqrstuvw xyz0123456789+/=";
local out = ""
local sl = string.len(str)
for i = 0, math.ceil(sl/3)-1 do
k = i*3
n1 = rshift(string.byte(str,1+ k),2)+1
n2 = (lshift(string.byte(str,1 +k),4) & 0x30) + 1
n3 = 65
n4 = 65
if sl >= 2+k then
n2 = n2 + (rshift(string.byte(str,2 +k),4) & 0x0F)
n3 = (lshift(string.byte(str,2 +k),2) & 0x3C) + 1
if sl >= 3+k then
n3 = n3 + (rshift(string.byte(str,3 +k),6) & 0x03)
n4 = string.byte(str,3+k) & 0x3F + 1
end
end
out = out .. string.sub(B64,n1,n1) .. string.sub(B64,n2,n2) .. string.sub(B64,n3,n3) .. string.sub(B64,n4,n4)
end
return out
end

[yaustar]

Assuming that & means bitwise and, try lookinbg around for band() function.

http://www.wowwiki.com/Lua_functions

[trex6662k5]

Thanks I'll see wether it helps

[the undead]

Ok Ive got this code and whenever I try to run it I get

lua:19 <eof> expected near 'end'

here is my code can you tell me whats wrong wit it

screen:clear()
white = Color.new(255, 255, 255)

background = Image.load("psp/IMAGE/psp.png")

screen:blit(0, 0, background, 0, 0, background:width(), background:height(), false)

file = io.open("psp/score.txt", "r")

score = file:read()

file:close()

screen:print(10,10,score,white)


screen.waitVblankStart()
screen.flip()
end

P.S. Thats the whole code

[Access_Denied]

Ok Ive got this code and whenever I try to run it I get

lua:19 <eof> expected near 'end'

here is my code can you tell me whats wrong wit it

screen:clear()
white = Color.new(255, 255, 255)

background = Image.load("psp/IMAGE/psp.png")

screen:blit(0, 0, background, 0, 0, background:width(), background:height(), false)

file = io.open("psp/score.txt", "r")

score = file:read()

file:close()

screen:print(10,10,score,white)


screen.waitVblankStart()
screen.flip()
end

P.S. Thats the whole code

You either have to add a 'while true do' or take out the 'end'
-= Double Post =-
Wait, are you trying to load an image from the PSP folder in the root? If so, you have to do:

ms0:/PSP/IMAGE/psp.png

[the undead]

You either have to add a 'while true do' or take out the 'end'
-= Double Post =-
Wait, are you trying to load an image from the PSP folder in the root? If so, you have to do:

ms0:/PSP/IMAGE/psp.png

Ill try that, but no i have subfolder named psp
-= Double Post =-
ok thanks the 'while true do' worked....I cant beleive i didnt catch that

[mark.sparky]

hey , can you let a player use the analaog stick in lua and if you can please tell me how

[AndyMosh]

Yeh you can, i think it's like:

pad = Controls.read()
if analog.x() and analog.y() then
blah
end

At least i think...

[myschoo]

hey , can you let a player use the analaog stick in lua and if you can please tell me how

Grimfate126:

if AX() >= 100 then
--move right
end
if AX() <= -99 then
--move left
end
if AY() >= 100 then
--move up
end
if AY() <= -99 then
--move down
end

[mark.sparky]

hey sorry to bother you guys again but can take a look at this code because i have been trying for hours but i just cant get the collision detection to work. Im trying to stop the player from walking into the fences.

-EDIT- Just change the file extension to .lua

[yaustar]

playerx should be player.x in the collision code. playery should be player.y. Also oldx and oldy need to be globals (declared at the top) for the script.

[mark.sparky]

well at the top ive put in oldx = player.x and oldy = player.y
and at the collision code ive put player.x and player.y but it is stilll not working