Lua Programming Help Thread

[CoMbiNa]

I got this:

screen:print(5,20,"You should take in "..(typingstring*2).." grams of protein each day", white)

do I need to change the typingstring*2?

go to MSN

[Moose]

Please remember to add the [CODE] tags where needed. ;)

[FaT3oYCG]

I got this:

screen:print(5,20,"You should take in "..(typingstring*2).." grams of protein each day", white)

do I need to change the typingstring*2?

go to MSN

i have to go but here is your answer

screen:print(5,20,"You should take in "..(tonumber(typingstring)*2).." grams of protein each day", white)

[CoMbiNa]

I didn't really understand, what I want is to put this:

typingstring = ""

so the users can start writing from nothing.
But of course "" isn't a number, so it gives me an error.

I'm really confused now

[Nielkie]

screen:print(5,20,"You should take in "..((tonumber(typingstring) or 0)*2).." grams of protein each day", white)

[CoMbiNa]

Hey I want to make a selection between 2 values, it goes like this:

text number 1: Kilograms to Pounds
text number 2: Pounds to Kilograms

Kilograms to Pounds
Pounds to Kilograms

When pressing the select button, one of those lines will flash, (appear, disappear, appear, disappear).
And it will change the wunit value each time
wunit = kglb
wunit = lbkg

Sorry if it's complicted or something

[Nielkie]

Hey I want to make a selection between 2 values, it goes like this:...

What's stopping you?

[CoMbiNa]

What's stopping you?

I'm kinda new to lua.
I don't know how to make it flash, and how to make it switch values each click.

[Mr_Shizzy]

Need help...

How could I take all the binary data from a file, and paste it into a specific hex address in another file ??

[TurtlesPwn]

Assuming I understand correctly you want to go from:
file1:
binary stuff
file2:
some stuff
some other stuff
to:
file1:
binary stuff
file2:
some stuff
binary stuff
some other stuff

Just some simple IO stuff and some seeking through file2 to get to where you want. The bottom of this has stuff about seeking but I'm not sure how it would apply with hex addresses. Essentially you're trying to make an on-psp hex editor and I haven't messed with that much, mostly just plaintext io.

[Insert_Witty_Name]

Need help...

How could I take all the binary data from a file, and paste it into a specific hex address in another file ??

The fact that you're perceiving it as a hex address matters little, it's still an offset into a file.

[Nielkie]

file1 = io.open("file1.bin",rb)
file2 = io.open("file2.bin",wb)
file2:seek("set",tonumber("HEXADDRESS",16))
file2:write(file1:read("*a"))
file1:close()
file2:close()

[dan369]

Ok, for some reason i cant get this to work, Could someone help me?

--Script

--Colours
red = Color.new(255,0,0)
black = Color.new(0,0,0)
blue = Color.new(0,0,255)

--Images
col = Image.load("images/col.png")
background = Image.load("images/lvl-1.png")

--Player
player = { x = 200, y = 50, img = Image.load("images/play.png") }

while true do
oldx = player.x
oldy = player.y
screen:clear()
pad = Controls.read()

--Blit images
screen:blit(0,0,col)
screen:blit(0,0,background) 
screen:blit(player.x, player.y, player.img)

colour = col:pixel(player.x + 2, player.y + 15)

if colour == red then 
player.y = oldy 
player.x = oldx
end

And Blah (movement ) 

screen.flip()
screen.waitVblankStart()
end

For some reason the oldx, oldy isnt working??
i just walk right through,
Note: the colour on the image has the same RGB so its not that

[yaustar]

What does the collision image look like?

[Nielkie]

Understand your program's flow, instead of just using examples. At the beginning of the loop, you are setting the oldx and oldy to your players position. Then, if a a colision, you are setting the players position to oldx and oldy. At that point they are already the same, so if a collision, nothing will happen.

[Nielkie]

EDIT: Double Post (TPG's squid proxy is screwy, so my internet is screwed up)

[dan369]

heres the image

[dan369]

Understand your program's flow, instead of just using examples. At the beginning of the loop, you are setting the oldx and oldy to your players position. Then, if a a colision, you are setting the players position to oldx and oldy. At that point they are already the same, so if a collision, nothing will happen.

Ok, i understand. Though i still dont get how i'd change the script to work?

[Nielkie]

Do you know the purpose of oldx and oldy?

[TurtlesPwn]

oldx and oldy are for storing your player's position in the previous loop and then if the player collides with something that cannot be walked through, then roll the player back to where he was before (oldx and oldy)
However, for the player's x and y to change to get him into a spot in which he might need to be rolled back, he needs to move first. Right now you are checking if he has moved into a bad spot and resetting him BEFORE HE EVEN GETS TO MOVE. You need to let him move and THEN check if he has moved into something he can't move into. If you can't figure out how to do that on your own then you need to start over learning lua and take it in smaller bits rather than trying to jump into a game.

[CoMbiNa]

I'm using denzeff osk, and I've completed modifying it, but I still need to fix this:

(What you type in the osk is the "typingstring")

*if typingstring = "" you can't press delete

*you can't press period when:
 typingstring = ""
 or, when there is already one period in the number.

(that's 3 if's in total that I need for the osk)

here's the code of the osk if needed: (not the original one, it's the one I made)

displaykeyboard = false
keyboard = {x = 0, y = 0, mode = 1, key = 5, buffer = "", key_img = Image.load("danzeff/keys1.png"), key_img2 = Image.load("danzeff/keys2.png")}
keyboard.key_values = {
	"a,bc","d.ef","g!hi",
	"j-kl","m\001 n","o?pq",
	"r(st","u:vw","x)yz",
					  
	"A^BC","[email protected]","G*HI",
	"J_KL","M\001 N",'O"PQ',
	"R=ST","U;VW","X/YZ",
					  
	"\0\0\0001","\0\0\0002","\0\0\0003",
	"\0\0\0004","\0\001.5","\0\0\0006",
	"\0\0\0007","\0\0\0008","\0\00009",
					  
	"(,.)","<\"'>","[-_]",
	"{!?}","\0\001 \0","\\+=/",
	"@:;#","$~`%","^"..string.char(15)..string.char(22).."&"
}

function keyboard.process(x,y,ctrldata,oldctrldata)
	keyboard.mode = 5

	if ctrldata:up() or ctrldata:down() then
		if inputtimer > 20 then inputtimer = 15 end
		inputtimer = inputtimer + 1
	else
		inputtimer = 0
	end

	local tx = math.floor((ctrldata:analogX()+128)/86)
	local ty = math.floor((ctrldata:analogY()+128)/86)+1
	keyboard.key = ty*3-(2-tx)

	if keyboard.mode == 7 then
		screen:blit(x,y,keyboard.key_img2,0,0,150,150)
	else
		screen:blit(x,y,keyboard.key_img,((keyboard.mode+1)/2-1)*150,0,150,150)
	end
	local tx = math.mod(keyboard.key,3)
	if tx == 0 then tx = 2 else tx = tx - 1 end
	local ty = math.floor(keyboard.key/10*3)
	if keyboard.mode > 4 then
		screen:blit(x+tx*43,y+ty*43,keyboard.key_img2,tx*64 + ((keyboard.mode+1-4)/2-1)*192,ty*64+150,64,64)
	else
		screen:blit(x+tx*43,y+ty*43,keyboard.key_img,tx*64 + ((keyboard.mode+1)/2-1)*192,ty*64+150,64,64)
	end

	
	local t = 0
	if ctrldata:square() and not oldctrldata:square() then
		t = 1
	elseif ctrldata:triangle() and not oldctrldata:triangle() then
		t = 2
	elseif ctrldata:cross() and not oldctrldata:cross() then
		t = 3
	elseif ctrldata:circle() and not oldctrldata:circle() then
		t = 4
	end
	if t ~= 0 then
		t = string.sub(keyboard.key_values[((keyboard.mode+1)/2-1)*9+keyboard.key],t,t)
		if t ~= "\r" then
			keyboard.buffer = t
		end
	end
end

function keyboard.typeToString(str)
	if not displaykeyboard then displaykeyboard = true end
	if keyboard.buffer == "\001" and str ~= "" then
		str = string.sub(str,1,-2)
	elseif keyboard.buffer ~= "\000" then
		str = str..keyboard.buffer
	end
	keyboard.buffer = ""
	return str
end

[dan369]

ok, i understand thanks TurtlesPWN

[TurtlesPwn]

YOU made that OSK but you can't figure out how to incorporate some more simple logic into it? BS

But whatever. Replace the typeToString function:

function keyboard.typeToString(str)
	if not displaykeyboard then displaykeyboard = true end
	if keyboard.buffer == "\001" and str ~= "" then
		str = string.sub(str,1,-2)
	else 
		if keyboard.buffer == "." then
			if str ~= "" and not string.find(str,".") then
				str = str..keyboard.buffer
			end
		elseif keyboard.buffer ~= "\000" then
			str = str..keyboard.buffer
		end
	end
	keyboard.buffer = ""
	return str
end

[CoMbiNa]

YOU made that OSK but you can't figure out how to incorporate some more simple logic into it? BS

But whatever. Replace the typeToString function:

function keyboard.typeToString(str)
	if not displaykeyboard then displaykeyboard = true end
	if keyboard.buffer == "\001" and str ~= "" then
		str = string.sub(str,1,-2)
	else 
		if keyboard.buffer == "." then
			if str ~= "" and not string.find(str,".") then
				str = str..keyboard.buffer
			end
		elseif keyboard.buffer ~= "\000" then
			str = str..keyboard.buffer
		end
	end
	keyboard.buffer = ""
	return str
end

Made the osk?
Man I said i've modified it lol
(your the one that sent me the original remember?)

can you go to msn?

[TurtlesPwn]

Yes, I know, but read your post:
"
here's the code of the osk if needed: (not the original one, it's the one I made)"

[CoMbiNa]

Yes, I know, but read your post:
"
here's the code of the osk if needed: (not the original one, it's the one I made)"

and also...

"and I've completed modifying it"

[Anti-QuickJay]

and also...

"and I've completed modifying it"

So you made it then modify it?
Or you modify it then made it?

[dan369]

So you made it then modify it?
Or you modify it then made it?

No, i think someone else made it he modified it lol

[sony psp player]

Hey,

I need some help modifying a string (containing a filename). Every space found should be replaced with a "+".

string.gsub(filename," ","+")

doesn't work

[SG57]

string.gsub returns the new string with the " " replaced with "+", it doesn't modify the string passed to it. Are you assigning it to anything?

new_filename = string.gsub(original_filename, " ", "+")

If you have been doing this then make sure original_filename does in fact contain spaces.