Lua Programming Help Thread

No. What do i put in the "string" part?

wow, the only thing i would suggest is try it on your psp too (if you are testing it with the windows luaplayer). The problem may be that the current luaplayer version for windows does not support fonts or something. dunno, i'll test it out in a second
-= Double Post =-
yay it still doesn't work :Argh: :Argh: :Argh: :Argh: :Argh: :Argh: :Argh: :Argh: :Argh: :Argh: :Argh: :Argh: :Argh: :Argh: :Argh: :Argh: :Argh: :Argh: :Argh: :Argh: :Argh: :Argh: :Argh: :Argh: :Argh: :Argh: :Argh: :Argh: :Argh: :Argh: :Argh: :Argh: :Argh: :Argh: :Argh: :Argh: :Argh: :Argh: :Argh: :Argh: :Argh: :Argh: :Argh: :Argh: :Argh: :Argh: :Argh: :Argh: :Argh: :Argh: :Argh: :Argh: :Argh: :Argh: :Argh: :Argh: :Argh: :Argh: :Argh: :Argh: :Argh: :Argh: :Argh: :Argh: :Argh: :Argh: :Argh: :Argh: :Argh: :Argh: :Argh: :Argh: :Argh: :Argh: :Argh: :Argh: :Argh: :Argh: :Argh: :Argh: :Argh: :Argh:

I got it to work. The problem is. I don't know how. Send me your code emericaska8r. I might be able to find out how it's different from mine.

ok heres the code that wont work:

Code:

---

Pic = { }
Pic[1] = { x= 80, y = 95, height = pic1:height(), width = pic1:width() }

Player = { }
Player[1] = { x = 50, y = 107 }

screenwidth = 480 - player:width()
screenheight = 272 - player:width()

function collisionCheck(Pic)
if (Player.x + playerWidth > Pic[1].x) and (Player.x < Pic[1].x + Pic[1].width) and (Player.y + playerHeight > Pic[1].y) and (Player.y < Pic[1].y + Pic[1].height) then
Player.x = oldx
Player.y = oldy
end
end

playerHeight = 90
playerWidth = 90

function movePlayer()
pad = Controls.read()
if pad:left() then
Player.x = Player.x - 1
end
if pad:right() then
Player.x = Player.x + 1
end
if pad:up() then
Player.y = Player.y - 1
end
if pad:down() then
Player.y = Player.y + 1
end
end

while true do
pad = Controls.read()
oldx = Player.x
oldy = Player.y
screen:clear()
collisionCheck(Pic[1])

---

It says that attempt to perform arithmetic on field 'x' (a nil value)
i cant fix it can someone help?

Zitat:

---

Zitat von %chrono trigger%

ok heres the code that wont work:

Code:

---

Pic = { }
Pic[1] = { x= 80, y = 95, height = pic1:height(), width = pic1:width() }

Player = { }
Player[1] = { x = 50, y = 107 }

screenwidth = 480 - player:width()
screenheight = 272 - player:width()

function collisionCheck(Pic)
if (Player.x + playerWidth > Pic[1].x) and (Player.x < Pic[1].x + Pic[1].width) and (Player.y + playerHeight > Pic[1].y) and (Player.y < Pic[1].y + Pic[1].height) then
Player.x = oldx
Player.y = oldy
end
end

playerHeight = 90
playerWidth = 90

function movePlayer()
pad = Controls.read()
if pad:left() then
Player.x = Player.x - 1
end
if pad:right() then
Player.x = Player.x + 1
end
if pad:up() then
Player.y = Player.y - 1
end
if pad:down() then
Player.y = Player.y + 1
end
end

while true do
pad = Controls.read()
oldx = Player.x
oldy = Player.y
screen:clear()
collisionCheck(Pic[1])

---

It says that attempt to perform arithmetic on field 'x' (a nil value)
i cant fix it can someone help?

---

you declare your array like this:

Player[1];

so, you cant do this:

Player.x;

you have to do this:

Player[1].x

get my point?

Zitat:

---

Zitat von Cheez Pirate

No. What do i put in the "string" part?

---

well.....

Zitat:

---

Zitat von BlackShark

I dont think you defined the font hight or width yet, try something like

rockwell:setPixelSizes(14 , 14)

put that right below when you loaded the font. should work

---

Zitat:

---

Zitat von Cheez Pirate

Text starts at the top-left just as images do.

---

Text always starts at the bottom-left for me. It seems like it does for Tai-Mai-Shu, too.

Zitat:

---

Zitat von Aphonia

Text always starts at the bottom-left for me. It seems like it does for Tai-Mai-Shu, too.

---

Yes it does.:tup:

Yup, and I figured out the same thing. ;) And it starts to get real confusing after a while. Trying to line up the with the printed font when you press up or down... Jeez.

Can someone plz work with me on the tab reader for guitarhelper? Im having trouble making it work. i need scrolling and reading all the lines from a text file. if someone can help me then plz add me
[email protected]
my messanger is compatible with msn messanger also.
or reply to this.

When ever i try to run this i get an error that says trying to index global 'file' a nil value
here is my code
http://img249.imageshack.us/img249/3190/aaaaapy9.png

On line 176 you should have:

Code:

---

file = io.open(name .. ".txt","r")

---

You always have a space before and after '..' or it won't work.

Zitat:

---

Zitat von Cheez Pirate

On line 176 you should have:

Code:

---

file = io.open(name .. ".txt","r")

---

You always have a space before and after '..' or it won't work.

---

ok, thanks i never knew that

You can have a space after the comma.
When i use file.io i always have a space after a comma.

hmm, now it says calling name a string value.... and it wont work....any idea?

Zitat:

---

Zitat von Tai-Mai-Shu

You can have a space after the comma.
When i use file.io i always have a space after a comma.

---

I never said you can't have a space after a comma... lol...
-= Double Post =-
Show me your whole code. That isn't enough to debug it...

Zitat:

---

Zitat von the undead

hmm, now it says calling name a string value.... and it wont work....any idea?

---

any one know how to fix this?

Edit- Ok hold on

Spoiler for Code:

Code:

---

System.usbDiskModeActivate()
white = Color.new(255,255,255)
counter = Timer.new()
name = io.open("flash1:/registry/system.dreg","r")
name:seek("set", 0x2380)
readname = name:read(27)
name:close()
counter:start()
while true do
pad = Controls.read()
screen:clear()
currentTime = counter:time()
if currentTime > 5000 or pad:cross() then
break
end
screen:print(100,100, "Hello" , white)
screen:print(100,115, readname , white)
screen.waitVblankStart()
screen.flip()
end
counter = nil
readname = nil

rgb1 = 255
rgb2 = 255
rgb3 = 255
white = Color.new(rgb1,rgb2,rgb3)
rgbr1 = 255
rgbr2 = 0
rgbr3 = 0
red = Color.new(rgbr1,rgbr2,rgbr3)
rgbb1 = 0
rgbb2 = 0
rgbb3 = 0
black = Color.new(rgbb1,rgbb2,rgbb3)

characters = { "a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k", "l", "m", "n", "o", "p", "q", "r", "s", "t", "u", "v", "w", "x", "y", "z", " ", "." }

selector = Image.createEmpty(8,10)
selector:clear(red)

charX = 1
charY= 30

currentLetter = 1

currentX = 9
currentY = 28

uppercase = true

name = ""
Line = ""

oldpad = Controls.read()


addX = 0
addY = -10
addRow = -9


function drawLetters()
for a = 1, 3 do
addX = 0
addY = addY + 10
addRow = addRow + 9
for b = 1, 9 do
addX = addX + 10
if uppercase == false then
screen:print(charX + addX,charY + addY, characters[b + addRow],white)
else
screen:print(charX + addX,charY + addY, string.upper(characters[b + addRow]),white)
end
end
end
addX = 0
addY = -10
addRow = -9
end



while true do
pad = Controls.read()

screen:clear(black)


screen:print(10,10,"Enter Word: "..name,white)
screen:print(106, 12,Line,white)
screen:blit(currentX,currentY, selector)

drawLetters()


if pad:cross() and oldpad:cross() ~= pad:cross() then
if uppercase == false then
name = name .. characters[currentLetter]
else
name = name .. string.upper(characters[currentLetter])
end
Line = Line .."_"
end


if pad:square() and oldpad:square() ~= pad:square() then
name = string.sub(name, 1, string.len(name) - 1)
Line = string.sub(Line, 1, string.len(Line) - 1)
end


if pad:triangle() and oldpad:triangle() ~= pad:triangle() then
if uppercase == false then
uppercase = true
else
uppercase = false
end
end


if pad:right() and currentLetter ~= 9 and currentLetter ~= 18 and currentLetter ~= 27 and oldpad:right() ~= pad:right() then
currentLetter = currentLetter + 1
currentX = currentX + 10
elseif pad:right() and oldpad:right() ~= pad:right() then
if currentLetter == 9 or currentLetter == 18 or currentLetter == 27 then
currentLetter = currentLetter - 8
currentX = 9
end
end

if pad:left() and currentLetter ~= 1 and currentLetter ~= 10 and currentLetter ~= 19 and oldpad:left() ~= pad:left() then
currentLetter = currentLetter - 1
currentX = currentX - 10
elseif pad:left() and oldpad:left() ~= pad:left() then
if currentLetter == 1 or currentLetter == 10 or currentLetter == 19 then
currentX = 8 + 80
currentLetter = currentLetter + 8
end
end


if pad:down() and currentLetter < 19 and oldpad:down() ~= pad:down() then
currentLetter = currentLetter + 9
currentY = currentY + 10
elseif pad:down() and currentLetter > 18 and oldpad:down() ~= pad:down() then
currentY = 28
currentLetter = currentLetter - 18
end


if pad:up() and currentLetter > 9 and oldpad:up() ~= pad:up() then
currentLetter = currentLetter - 9
currentY = currentY - 10
elseif pad:up() and currentLetter < 18 and oldpad:up() ~= pad:up() then
currentY = 48
currentLetter = currentLetter + 18
end

if pad:start() and oldpad:start() ~= pad:start() then
wordfound = false
dirList = System.listDirectory("ms0:/PSP/Game/Dic/words")
folderFound = false
for i = 1,table.getn(dirList) do
if string.find(dirList[i].name, name) then
folderFound = true
notfound = false
end
end
if not folderFound then
notfound = true
end
end
if folderFound == true then
dirList = System.listDirectory("ms0:/PSP/Game/Dic/words/" .. name"/")
word1 = io.open(name .. ".txt", "r")
wordread = file:read()
word1:close()
wordfound = true
end
if notfound == true then
wordfound = false
screen:print(100, 100,"Sorry that word is not found.",white)
end

screen.flip()
screen.waitVblankStart()
oldpad = pad
end

---

I don't know if this will help but shouldn't

Code:

---

wordread = file:read()

---

be:

Code:

---

wordread = word1:read()

---

Zitat:

---

Zitat von Cheez Pirate

I don't know if this will help but shouldn't

Code:

---

wordread = file:read()

---

be:

Code:

---

wordread = word1:read()

---

---

ill try that
-= Double Post =-
now it says attempt to index global 'word1'<a nil value>

Because your calling 'name', an io.open function, in another io.open function, being 'word1'.

Now I'll need to know what your going to use 'name' for and what your going to use 'word1' for.

Zitat:

---

Zitat von Cheez Pirate

Because your calling 'name', an io.open function, in another io.open function, being 'word1'.

Now I'll need to know what your going to use 'name' for and what your going to use 'word1' for.

---

name is to find the correct file and word1 is to open that file


oh and if u do figure this out i appreciate it, ive been looking at this for an hour trying to figure out whats wrong and stuff

Confusing.

Code:

---

word1 = io.open(name .. ".txt", "r")

---

Explain to me what this whole line does. In order. It should help me understand it.

Zitat:

---

Zitat von Cheez Pirate

Confusing.

Code:

---

word1 = io.open(name .. ".txt", "r")

---

Explain to me what this whole line does. In order. It should help me understand it.

---

ok word1 is a new variable i called to open up the file, now name is a variable already stated. so its saying open up the variable(it is a string) name.txt and read it

So do you have a file called "name.txt" in the same folder as your index.lua? Or whatever you named it.

Zitat:

---

Zitat von Cheez Pirate

So do you have a file called "name.txt" in the same folder as your index.lua? Or whatever you named it.

---

i have a file named Acid.txt when i type Acid on the psp that is what name equals. so when i say word1 = io.open(name..".txt", "r") it should be the same as word1 = io.open("Acid.txt", "r")

But name opens a flash1 file. Does the flash1 file contain the word "acid?"

Zitat:

---

Zitat von Cheez Pirate

But name opens a flash1 file. Does the flash1 file contain the word "acid?"

---

ur right i didnt notice that ill fix it then try it
-= Double Post =-
I tried it and i still get word1 is a nil value...

And what did you replace the flash1 file with? The whole line.

i just renamed the variable to nname

Hmm. Well I dunno where in the registry that your going to find the word 'acid.'

Zitat:

---

Zitat von Cheez Pirate

Hmm. Well I dunno where in the registry that your going to find the word 'acid.'

---

im not looking in the registry, when you type it on the psp name =s what u typed, i have a onscreen keybord so when i type acid that is wat name equals, imtrying to open a file called acid because that is what i typed...the first part of the code just shows your psps nick name

Code:

---

name:seek("set",0x2380)

---

Must be a nil value when it reads it... Are you sure that's the right line for your system's name?

Zitat:

---

Zitat von Cheez Pirate

Code:

---

name:seek("set",0x2380)

---

Must be a nil value when it reads it... Are you sure that's the right line for your system's name?

---

im not talking about that part.... it is no longer

Code:

---

name:seek("set",0x2380)

---

its now

Code:

---

nname:seek("set",0x2380)

---

so their is no problem with that, im talking about my code closer to the bottom.
here is a summury of the code that im having a problem with

Code:

---

name = " "
--onscreen keyboard code

if pad:start() then
blah
blah blah
word1 = io.open(name .. ".txt", "r")
wordread = word1:read()
word:close()

---

it says that word1 is a nil value

1. Is there numbers or letters in acid.txt?

2. Is there a value named 'name' that stores the text you print? If there is. What is it?

Zitat:

---

Zitat von Cheez Pirate

1. Is there numbers or letters in acid.txt?

2. Is there a value named 'name' that stores the text you print? If there is. What is it?

---

1. no their is no numbers
2. yes, its called name, the text i print is acid

See what it does when you change it to. ("acid.txt","r")

why do u have

while true do

2x in ur script? o_O

edit. oh and btw i found problem with name reading ...

in 3.03 its on offset 2380 but i tested it on 3.10 and i didnt see my name, so probably the offset changes together with FW -_-

hmm, it works on my 3.03 oe c, but i just can figure out what is wrong with it

how to make internet browser from lua?? and wlan load and also memory stick load??

anybody bored and wanna try to work out the collision problems in my code?