Lua Programming Help Thread

[Bronx]

d*m*, does any1 else know how to give only one chance to answer a question and either restart the game if they get it wrong or go on to the next question if they get it correct?

can anyone help me out here plz? thanks

[c5cha7]

guys what do i replace if pad:circle() to make it attomatic so it moves by it self with out pressing a button ?

Be alittle more precise and i think i can help :icon_wink .
I dont really understand at the moment?

[Mast3r_Shak3]

can anyone help me out here plz? thanks

post the code

[Bronx]

ok here it is

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


-- Questions 1
questionOne = "Who hit the most homeruns ever?"
--answers 1
answerOne = "down = Babe Ruth"
answerTwo = "right = Hank Aaron"
answerThree = "left = Barry Bond"
answerFour = "up = Sammy Sosa"

--****Main Loop****
while true do
screen:clear()
pad = Controls.read()

screen:print(80, 100, questionOne, blue)

screen:print(150, 200, answerOne, white)

screen:print(150, 215, answerTwo, white)

screen:print(150, 230, answerThree, white)

screen:print(150, 245, answerFour, white)

if pad:down() then
screen:print(150, 110, "sorry, incorrect.", red)
end

if pad:right() then
screen:print(150, 110, "Your Correct!", green)
end

if pad:left() then
screen:print(150, 110, "sorry, incorrect.", red)
end

if pad:up() then
screen:print(150, 110, "sorry, incorrect.", red)
end

screen.flip()
screen.waitVblankStart()
end

btw there isnt any bugs in it now, i just need to know wat i asked before...

[natan333]

Be alittle more precise and i think i can help :icon_wink .

sorry, i will try to be cool =P  (i love learning this)

I dont really understand at the moment?

I mean If i put this code

letterPos = {}
letterPosx = 200
letterPosy = 100

while true do
blue=Color.new(0,200,350)            
screen:clear()
pad = Controls.read()
if pad:circle() then letterPosx = letterPosx + 2 end
screen:print(letterPosx, letterPosy, "HELLO", blue)


if pad:select() then
break
end
screen.flip()
screen.waitVblankStart()


end

the hello will only move right if a press the circle button becuase

if pad:circle() then letterPosx = letterPosx + 2 end

is included.
my question is: is there a code to replease the

if pad:circle() then letterPosx = letterPosx + 2 end

to make it move right with out pressing any button ?

[Jeffery]

Natan333 -

Do you mean that you just want the "HELLO" to move by itself? If so, then you just replace "pad:circle()" with "true". So the code would look like this.

 
letterPos = {}
letterPosx = 200
letterPosy = 100
 
while true do 
blue = Color.new(0,200,350)
 
screen:clear()
 
pad = Controls.read()
 
if true then letterPosx = letterPosx + 2 end
screen:print(letterPosx, letterPosy, "HELLO", blue)
 
if pad:select() then
break
end
 
screen.flip()
screen.waitVblankStart()
 
end

[c5cha7]

Natan333 -

Do you mean that you just want the "HELLO" to move by itself? If so, then you just replace "pad:circle()" with "true". So the code would look like this.

 
letterPos = {}
letterPosx = 200
letterPosy = 100
 
while true do 
blue = Color.new(0,200,350)
 
screen:clear()
 
pad = Controls.read()
 
if true then letterPosx = letterPosx + 2 end
screen:print(letterPosx, letterPosy, "HELLO", blue)
 
if pad:select() then
break
end
 
screen.flip()
screen.waitVblankStart()
 
end

Argh...
You beat me to it .
but yea, i think he means that?
unless you mean if you press select it
will keep moving even is select isn't holded?

[natan333]

Thanks Jeffery , thats what i needed to know, If true is to move then false is to stop right ?
like. if its moving, i plan to make it stop after 5 seconds, to do it i put something like

screen.waitVblankStart(50) False

?

[Glynnder]

youd say something like:
-- top of the script

movehello = true


if movehello == true then
letterPosx = letterPosx + 2 end
screenrint(letterPosx, letterPosy, "HELLO", blue)
screen.waitVblankstart(50 )
movehello = false
end

[Bronx]

ok here it is

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


-- Questions 1
questionOne = "Who hit the most homeruns ever?"
--answers 1
answerOne = "down = Babe Ruth"
answerTwo = "right = Hank Aaron"
answerThree = "left = Barry Bond"
answerFour = "up = Sammy Sosa"

--****Main Loop****
while true do
screen:clear()
pad = Controls.read()

screen:print(80, 100, questionOne, blue)

screen:print(150, 200, answerOne, white)

screen:print(150, 215, answerTwo, white)

screen:print(150, 230, answerThree, white)

screen:print(150, 245, answerFour, white)

if pad:down() then
screen:print(150, 110, "sorry, incorrect.", red)
end

if pad:right() then
screen:print(150, 110, "Your Correct!", green)
end

if pad:left() then
screen:print(150, 110, "sorry, incorrect.", red)
end

if pad:up() then
screen:print(150, 110, "sorry, incorrect.", red)
end

screen.flip()
screen.waitVblankStart()
end

btw there isnt any bugs in it now, i just need to know wat i asked before...

PLZ help! all i want is to know how to move on to a new question if the question before that was answered correct?!?!?! can some1 plz help me?????

[Grimfate126]

PLZ help! all i want is to know how to move on to a new question if the question before that was answered correct?!?!?! can some1 plz help me?????

u could have a function for each question. like:

function questionOne()

-- your question code--

THEN u could make a variable like:

questionanswered = false

then, when the person preses up down, or whatever, u put:

questionanswered = true

and then put:

if questionanswered == true then
function questionTwo()
end

where function questionTwo() is your second question... and so on.

hope i helped:)

[Bronx]

u could have a function for each question. like:

function questionOne()

-- your question code--

THEN u could make a variable like:

questionanswered = false

then, when the person preses up down, or whatever, u put:

questionanswered = true

and then put:

if questionanswered == true then
function questionTwo()
end

where function questionTwo() is your second question... and so on.

hope i helped:)

ok get wat ur saying but how would i make questionOne when printed on the screen say the actual qustion? do u have msn messenger? wa it be possoble if u type up an example plz? thanks for ur help!

[Grimfate126]

ok get wat ur saying but how would i make questionOne when printed on the screen say the actual qustion? do u have msn messenger? wa it be possoble if u type up an example plz? thanks for ur help!

my msn account is :

[email protected]


can u come on now?

[Bronx]

yeah i can come on now!

edit- mine is [email protected] add me

[darkshadow88]

bronxbomber, the best way to do this is using arrays. The following example will proceed to the next question if correct and go back to question 1 if incorrect:

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

totalquestions=1

questions = {}
answerOne = {}
answerTwo = {}
answerThree = {}
answerFour = {}
correctanswer = {}
questions[1] = "Who hit the most homeruns ever?"
answerOne[1] = "down = Babe Ruth"
answerTwo[1] = "right = Hank Aaron"
answerThree[1] = "left = Barry Bond"
answerFour[1] = "up = Sammy Sosa"
correctanswer[1]=2

i=1
while i<=totalquestions do
    screen:clear()
    screen:print(80, 100, questions[i], blue)
    screen:print(150, 200, answerOne[i], white)
    screen:print(150, 215, answerTwo[i], white)
    screen:print(150, 230, answerThree[i], white)
    screen:print(150, 245, answerFour[i], white)
    inputreceived=0
    screen.flip()
    screen.waitVblankStart()
    while inputreceived==0 do
        pad = Controls.read()

        if pad:down() then
           screen.flip()
           if correctanswer[i]==1 then
               screen:print(150, 110, "You're Correct!", green)
           else
               screen:print(150, 110, "Sorry, incorrect.", red)
               i=0
           end
           inputreceived=1
        end
        
        if pad:right() then
           screen.flip()
           if correctanswer[i]==2 then
               screen:print(150, 110, "You're Correct!", green)
           else
               screen:print(150, 110, "Sorry, incorrect.", red)
               i=0
           end
           inputreceived=1
        end
        
        if pad:left() then
           screen.flip()
           if correctanswer[i]==3 then
               screen:print(150, 110, "You're Correct!", green)
           else
               screen:print(150, 110, "Sorry, incorrect.", red)
               i=0
           end
           inputreceived=1
        end
        
        if pad:up() then
           screen.flip()
           if correctanswer[i]==4 then
               screen:print(150, 110, "You're Correct!", green)
           else
               screen:print(150, 110, "Sorry, incorrect.", red)
               i=0
           end
           inputreceived=1
        end
    end
    i = i+1
    screen.flip()
    screen.waitVblankStart(120)
end

Edit: Edited so that there's a 2-second delay before loading the next question, allowing for seeing whether the answer was right or not.

Edit again: I have no idea why that huge space is showing up between "12" and "0"

Edit again: Forgot to initialize the arrays.

[Bronx]

bronxbomber, the best way to do this is using arrays. The following example will proceed to the next question if correct and go back to question 1 if incorrect:

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

questions[1] = "Who hit the most homeruns ever?"
answerOne[1] = "down = Babe Ruth"
answerTwo[1] = "right = Hank Aaron"
answerThree[1] = "left = Barry Bond"
answerFour[1] = "up = Sammy Sosa"
correctanswer[1]=2

i=1
while true do
    screen:clear()
    screen:print(80, 100, questions[i], blue)
    screen:print(150, 200, answerOne[i], white)
    screen:print(150, 215, answerTwo[i], white)
    screen:print(150, 230, answerThree[i], white)
    screen:print(150, 245, answerFour[i], white)
    inputreceived=0
    screen.waitVblankStart()
    screen.flip()
    while inputreceived==0 do
        pad = Controls.read()

        if pad:down() then
           screen.flip()
           if correctanswer[i]==1 then
               screen:print(150, 110, "You're Correct!", green)
           else
               screen:print(150, 110, "Sorry, incorrect.", red)
               i=0
           end
           inputreceived=1
        end
        
        if pad:right() then
           screen.flip()
           if correctanswer[i]==2 then
               screen:print(150, 110, "You're Correct!", green)
           else
               screen:print(150, 110, "Sorry, incorrect.", red)
               i=0
           end
           inputreceived=1
        end
        
        if pad:left() then
           screen.flip()
           if correctanswer[i]==3 then
               screen:print(150, 110, "You're Correct!", green)
           else
               screen:print(150, 110, "Sorry, incorrect.", red)
               i=0
           end
           inputreceived=1
        end
        
        if pad:up() then
           screen.flip()
           if correctanswer[i]==4 then
               screen:print(150, 110, "You're Correct!", green)
           else
               screen:print(150, 110, "Sorry, incorrect.", red)
               i=0
           end
           inputreceived=1
        end
    end
    i = i+1
    screen.waitVblankStart()
    screen.flip()
end

wow i had no idea how to do that! could u possibly explain that for me in a pm? thanks a lot!

[natan333]

youd say something like:
-- top of the script

movehello = true


if movehello == true then
letterPosx = letterPosx + 2 end
screenrint(letterPosx, letterPosy, "HELLO", blue)
screen.waitVblankstart(50 )
movehello = false
end

letterPos = {}
letterPosx = 200
letterPosy = 100

while true do 
blue = Color.new(0,200,350)
movehello = true
screen:clear()
pad = Controls.read()


if movehello == true then letterPosx = letterPosx + 2 end
screen:print(letterPosx, letterPosy, "HELLO", blue)
screen.waitVblankStart(50)
movehello = false


if pad:select() then
break
end
 
screen.flip()
screen.waitVblankStart()
 
end

1st it takes the 50 to appear the word, 2nd it takes 50 to move each 2 pixel.
the thing is that "screen.waitVblankStart(5 0)" work for the word and the false , is there a way to make "screen.waitVblankStart(5 0)" separate from the HELLo word and Work only for the False ?
can you correct it please? so it starts normally and stops at 50

[natan333]

Guys i have a question: there is a kinda of a circle object, but the hole image is a square, the white is outside of the circle and blue is inside the circle. I saw some pictures that is a circle ones, and the outside of the circle have a color to make it invisivel (like make the outside bellow of any picture that comes), so other colors can go above it and repleace the white with other picture above it
. what could the Hue, Sat, Lum, Red, Green, Blue could be ?

[MexicanSnake]

ok i ask if is posible to make 2 buttons make one fuction ..... example press cross and square at the same time and that will make a break or do something ... like on umd loadder

I want to know that!!!!!!!!

[PSPHax0r9]

I want to know that!!!!!!!!

Yes...it's really easy....

pad=Controls.read()
if pad:cross() and pad:circle() then
do something
end

That will make it so that if X and O are pressed at the same time, and ONLY if they are pressed at the same time, it will do something. It works with any button combnation and also with more than 2 buttons. For example:

pad=Controls.read()
if pad:cross() and pad:circle() and pad:square() and pad:triangle() and pad:up() and pad:down() and pad:left() and pad:right() and pad:l() and pad:r() and pad:start() then
do something
end

also works.

[natan333]

can some edit this code

letterPos = {}
letterPosx = 200
letterPosy = 100

blahblah = Font.createProportional()
blahblah:setPixelSizes(0, 32)

while true do
blue=Color.new(0,200,350)              
screen:clear()
pad = Controls.read()

analogX = pad:analogX()
analogY = pad:analogY()

if analogX > 80 then letterPosx = letterPosx + 3 end
if analogX < -80 then letterPosx = letterPosx - 3 end
if analogY > -80 then letterPosy = letterPosy + 3 end
if analogY < 80 then letterPosy = letterPosy - 3 end

screen:fontPrint(blahblah, letterPosx, letterPosy, "Hello", blue)

if pad:select() then
break
end
screen.flip()
screen.waitVblankStart()

end

and make the hello move smooth ?
thx
between, can someone also edit the code below and show how can i make the font change from 32 to 40 when press L trigger? ( I tried to add L trigger at "font create" and "set pixel", it only gave me a error =( )

[MexicanSnake]

Yes...it's really easy....

pad=Controls.read()
if pad:cross() and pad:circle() then
do something
end

That will make it so that if X and O are pressed at the same time, and ONLY if they are pressed at the same time, it will do something. It works with any button combnation and also with more than 2 buttons. For example:

pad=Controls.read()
if pad:cross() and pad:circle() and pad:square() and pad:triangle() and pad:up() and pad:down() and pad:left() and pad:right() and pad:l() and pad:r() and pad:start() then
do something
end

also works.

thanx guy i really need that to use it with my shootouts game!!!

[natan333]

Guys, wast this supposed to work ?

letterPos = {}
letterPosx = 200
letterPosy = 100

-----------------------------------------------
puffa = Font.createProportional()
puffa:setPixelSizes(0, 32)
-----------------------------------------------

while true do
blue=Color.new(0,200,350)              
screen:clear()
pad = Controls.read()

-----------------------------------------------
if pad:r() blahblah = puffa then 
end
-----------------------------------------------

analogX = pad:analogX()
analogY = pad:analogY()

if analogX > 80 then letterPosx = letterPosx + 3 end
if analogX < -80 then letterPosx = letterPosx - 3 end
if analogY > -80 then letterPosy = letterPosy + 3 end
if analogY < 80 then letterPosy = letterPosy - 3 end

screen:fontPrint(blahblah, letterPosx, letterPosy, "Hello", blue)

if pad:select() then
break
end
screen.flip()
screen.waitVblankStart()

end

The thing i want to do is to make the Hello size change only if i press R button.
i think it will have to use true and false codes
can anybody show me how to do it ?

[Glynnder]

onething to remember with the:

pad=Controls.read()
if pad:cross() and pad:circle() then
do something
end

is that if you have another script that uses pad:cross() then say
if pad:cross() and not pad:circle() then
other script here
end

[natan333]

letterPos = {}
letterPosx = 200
letterPosy = 100

blahblah = Font.createProportional()
blahblah:setPixelSizes(0, 20)

while true do
blue=Color.new(0,200,350)              
screen:clear()
pad = Controls.read()

if pad:r() then blahblah:setPixelSizes(0, + 20) end

analogX = pad:analogX()
analogY = pad:analogY()

if analogX > 80 then letterPosx = letterPosx + 3 end
if analogX < -80 then letterPosx = letterPosx - 3 end
if analogY > -80 then letterPosy = letterPosy + 3 end
if analogY < 80 then letterPosy = letterPosy - 3 end

screen:fontPrint(blahblah, letterPosx, letterPosy, "Hello", blue)

if pad:select() then
break
end
screen.flip()
screen.waitVblankStart()

end

i though this was the right code for R trigger to add 20 font to the Hello word so the font will change it to 40 and pressing R trigger again to give me font 60, but it gives me error :Cry:
can somebody help me pls?

[natan333]

i have another question:

letterPos = {}
letterPosx = 200
letterPosy = 100

blahblah = Font.createProportional()
blahblah:setPixelSizes(0, 20)


while true do
blue=Color.new(0,200,350)              
screen:clear()
pad = Controls.read()

----------------------------------------------
if pad:r() then
screen:clear()
screen:print(194,136, "Blue Team Wins", blue)
screen.flip()
screen:print(240,250, "Press Select to Exit", blue)
screen.flip()
screen.waitVblankStart(50)
end
-----------------------------------------------

analogX = pad:analogX()
analogY = pad:analogY()

if analogX > 80 then letterPosx = letterPosx + 3 end
if analogX < -80 then letterPosx = letterPosx - 3 end
if analogY > -80 then letterPosy = letterPosy + 3 end
if analogY < 80 then letterPosy = letterPosy - 3 end

screen:fontPrint(blahblah, letterPosx, letterPosy, "Hello", blue)

if pad:select() then
break
end
screen.flip()
screen.waitVblankStart()

end

how can i make the "screen.waitVblankStart(5 0)" work only inside the ------ lines?
and not slow down the moving "Hello" word when you move it with the analog stick ?
i m trying to do this sinse i 1st stared studing this but still cant figure it out how

[KINGOFNOOBS]

how to you code AI in Lua? (for a side scroller)

[Bronx]

how to you code AI in Lua? (for a side scroller)

yeah i would like to know that also?!?!

[Grimfate126]

yeah i would like to know that also?!?!

me 2!

[brtn_cruzer]

i need to make the background of a png image transparent is this possible and if so how do i do it