Lua Programming Help Thread

[Mast3r_Shak3]

OKay I wrote this code so when you press X you throw something. But I have to hold X for it to travel across the screen. What would I put in the code?

if pad:cross() then
   
   if z == 2 then
      poox = poox + poospeed
   elseif z == 1 then
      poox = poox - poospeed
   end
   screen:blit(poox, pooy, poo)
    if poox >= 480 then
      poox = player.x
      pooy = player.y + 12
    elseif poox <= 0 then
      poox = player.x
      pooy = player.y + 12
    end
end

[mstrhelix]

I am having trouble using \n (newline) option with lua 0.16 and .20. here is my code...

--Readfile config file, print
--


red = Color.new(255, 0 , 0)
black= Color.new(0,0,0)
white= Color.new(255,255,255)
blue= Color.new(0,0,255)
grey= Color.new(192,192,192)


file = io.open("TODO", "r")
if file then
screen:clear(white)
screenrint(140,126,"File Found")
screen.flip()
System.sleep(2000)
screen:clear(white)
for line in file:lines() do
screenrint(10,10,line .. "\n")
screen.flip()
end

end

else
screen:clear(black)
screenrint(140,100,"file Don`t Exist!",red)
screen.flip()
end


---------------------------------
What i want it to do is print the textfile to screen which it does but it only prints one line and goes off screen i want to use \n newline option but it doesn't seem to work for me. Instead of newline i get a wierd circle symbol. I am also using ttlde2.0 to edit and run my lua scripts if that helps.
Thanks for any help

[Grimfate126]

OKay I wrote this code so when you press X you throw something. But I have to hold X for it to travel across the screen. What would I put in the code?

if pad:cross() then
   
   if z == 2 then
      poox = poox + poospeed
   elseif z == 1 then
      poox = poox - poospeed
   end
   screen:blit(poox, pooy, poo)
    if poox >= 480 then
      poox = player.x
      pooy = player.y + 12
    elseif poox <= 0 then
      poox = player.x
      pooy = player.y + 12
    end
end

try this:

if pad:cross() and oldpad:cross() ~= pad:cross() then
if poofire == false then
poofire = true
elseif poofire == true then
poofire = true
end

THEN put:

if poofire == true then
  if z == 2 then
      poox = poox + poospeed
   elseif z == 1 then
      poox = poox - poospeed
   end
   screen:blit(poox, pooy, poo)
    if poox >= 480 then
      poox = player.x
      pooy = player.y + 12
    elseif poox <= 0 then
      poox = player.x
      pooy = player.y + 12
    end
end

youll have to put in oldpad statements tho.

[Glynnder]

i am having the same problem as mstrhelix if anyone could help

[Grimfate126]

i am having the same problem as mstrhelix if anyone could help

i could try, i guess.

[Altair]

You cant use it to go to a next line on the screen, because it doesnt know what a return is. It works when you write to a file.
For the screen you have to have a variable for the y coordinate and add 8 to it for every new line.

BTW Grimfate why do you post that you will try, what help is that?

[emericaska8r]

or to solve the throwing problem you could just use a loop like:

if pad:cross() then
while true do
poox = poox + speed
if poox > 480 then
throw = false
end
else
screen:blit(poo)
end

[Glynnder]

well pplease can u help? that would help lol!

Also, i get what u mean with the variable thing...

[Grimfate126]

or to solve the throwing problem you could just use a loop like:

if pad:cross() then
while true do
poox = poox + speed
if poox > 480 then
throw = false
end
else
screen:blit(poo)
end

that would work, but you cant have too many loops.

@ gynnder -PSPro, i need your code.

[Vaza]

It sets the transparency. 0 is no transparency and 255 is full transparency.

OK thanks, how do i use it in screen:blit() then?
--Vaza

[Glynnder]

kk, i'll try and give it to you, its gonna be simple cos its part of something huge!

Also, why aint this a sticky anymore?

[kozine]

Yea I dunno why its not a sticky. Its harder to find.

[zmathue]

I got two questons
1.
Can any one help me I want my program to Save a irda signal to a variable on a botton press while selecting an object on a menu.
This is what I have so far:

if pad:circle() and menustatus == -1 then
irdasignal = System.irdaRead()
end

2.
when I hit left or right my pic. doesnt move but when I hit up or down it moves .

red = Color.new(255, 0, 0);
white = Color.new(255, 255, 255);

char = Image.load("char.png")

y = 100
x = 100

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

		if pad:up() then
			y = y - 1
		elseif pad:down() then
			y = y + 1
		elseif pad:left() then
			X = x - 1
		elseif pad:right() then
			X = x + 1
		end
	screen:blit(x, y, char, 0, 0, char:width(), char:height(), true)
screen.flip()
	screen.waitVblankStart()
	if pad:start() then break end
end

[Vaza]

I got two questons
1.
Can any one help me I want my program to Save a irda signal to a variable on a botton press while selecting an object on a menu.
This is what I have so far:

if pad:circle() and menustatus == -1 then
irdasignal = System.irdaRead()
end

2.
when I hit left or right my pic. doesnt move but when I hit up or down it moves .

red = Color.new(255, 0, 0);
white = Color.new(255, 255, 255);

char = Image.load("char.png")

y = 100
x = 100

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

		if pad:up() then
			y = y - 1
		elseif pad:down() then
			y = y + 1
		elseif pad:left() then
			X = x - 1
		elseif pad:right() then
			X = x + 1
		end
	screen:blit(x, y, char, 0, 0, char:width(), char:height(), true)
screen.flip()
	screen.waitVblankStart()
	if pad:start() then break end
end

1. I dont use IRDA so i don know

2.

red = Color.new(255, 0, 0);
white = Color.new(255, 255, 255);

char = Image.load("char.png")

y = 100
x = 100

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

		if pad:up() then
			y = y - 1
		elseif pad:down() then
			y = y + 1
		elseif pad:left() then
			X = x - 1
		elseif pad:right() then
			X = x + 1 --Caps lock on for first X but not on for 2nd X, same with Pad:left().
		end
	screen:blit(x, y, char, 0, 0, char:width(), char:height(), true)
screen.flip()
	screen.waitVblankStart()
	if pad:start() then break end
end

[emericaska8r]

for the ir signal, my only advice would be to look at the ir source code of the program that is bundled into lua player when u get it.

[zmathue]

um all that does is store it to the variable for like a second then the variable is replaced with null or another empty data.

[ZereoX]

Whar is the Analog configuration how do i use it EX:

if nub:up() then ...

[Vaza]

Whar is the Analog configuration how do i use it EX:

if nub:up() then ...

i think its:
if pad:analog() >/</~=/== [number in degrees] then

ex.

if pad:analog() > 45 then
screenrint(10, 10, "Test", red)
end

This means that if the Analog is at a angle that is greater than 45 Degrees then the text will print.

--Vaza

[Zeemon]

Thanks Vaza... That help me alot too!

(Off subject) haha... it won't let you post screen: print!

[Electro]

what sound files does lua player surrport>
is it just mod an wav,, or is there anything else

[Vaza]

what sound files does lua player surrport>
is it just mod an wav,, or is there anything else

The Mod family and WAV.
Mod Family consists of Mod, XM, IT, S3M and many more.
--Vaza

[Electro]

thanks,,
but when i convert a mid to an xm, or it,, it wont play right,, is that normal,

[Glynnder]

errr, didn't think so...

[Electro]

i just did a whole bunck of checks,,
turns out im processing too much at the same time,, cause the music to be chuncky,,
anyway to avoid that(on pc, it sounds nice)

and what is the proper way to exit your game from lua player,,
since break, just breaks the loop,, (and music continues and such)

[emericaska8r]

i just did a whole bunck of checks,,
turns out im processing too much at the same time,, cause the music to be chuncky,,
anyway to avoid that(on pc, it sounds nice)

and what is the proper way to exit your game from lua player,,
since break, just breaks the loop,, (and music continues and such)

yes i hate it when i quit a game and the music is still playing from it.

[zmathue]

well you got to kill the music playing before you exit.

[Bronx]

anyone good with AI? i have a game with AI but it wont load

[ZereoX]

Anyone has a good and easy wait to make a scrolling map where you can move a guy.

[Electro]

well you got to kill the music playing before you exit.

but even if you do that, the game still continues to run in the bg

[Altair]

It does say so, but if you think about it, you do exit the game loop so it isn't running anymore. I don't know why its saying it is.

@Vaza
transparency:

redTrans=Color.new(255, 0, 0, 128)
transparantPic=Image.createEmpty(width, height)
transparantPic:clear(redTrans)
screen:blit(x,y,image,0,0,width,height,true)

This will create a square of width and height, ay x and y, that has a half-transparant red color. The boldfaced 128 is why its half-transparant. 255 would mean fully transparant and 0 not transparant. Also you have to put true in screen:blit so it knows there are transparant pixels in the image.