Lua Programming Help Thread

[natan333]

there is one thing that i m stuck at

this is the code

blue=Color.new(0,153,225)  

screen:print(200, 100, "Hello!", blue)
screen:flip() 

screen.waitVblankStart(30) 
screen:print(200, 50, "Hello!", blue)
screen:flip() 


while true do
screen.waitVblankStart()
end

I want to put a word with out delay, then make another word appear after like 2 second but cant figure it out =(
if i put screen:flip() 2 times, it will disable the 1st word and make the other one appear
Please Help!

Laught if you think this is noobish(I dont care) I m new using this but not new at making hacks for pc games

[Altair]

blue=Color.new(0,153,225)    
timer=new.Timer()

screen:print(200, 100, "Hello!", blue)
screen:flip() 
timer:start()

if timer==2000 then
screen:print(200, 50, "Hello!", blue)
screen:flip() 
end

while true do
screen.waitVblankStart()
end

For some reason the "screen.waitVblankStart(3 0)" doesn't really pause. Atleast its not working for me. Even if i put in 1 million its like there is just a "screen.waitVblankStart() "?

Not laughing at all people ask this all the time.

[soadnation]

why wont they stay?

[edit]and i dont think its working at all cause when i press start to break the program it does nothing as well[/edit]

the break part when u hit start should work. i just tested it. and to make it stay make the while loop look like this

while true do
screen:clear()
screen:blit(0, 0, background,  false)
pad = Controls.read()

if titleNumber == 1 then
		screen:blit(0,0,titlePlay  )
	end
	if titleNumber == 2 then
		screen:blit(0,0,titleInfo  )
	end
	if titleNumber == 3 then
		screen:blit(0,0,titleExit  )
	end
	if titleNumber < 1 or titleNumber > 3 then
		screen:print(0,0,"error in titleNumber", white)

	end


if pad:start() then
	break
end
--Main Menu D-Pad Controls
if pad:right() and titleNumber < 3 then
titleNumber = titleNumber + 1
end
if pad:left() and titleNumber > 1 then
titleNumber = titleNumber - 1
end
screen.flip()
end

and get rid of the funtion for the menu

[natan333]

blue=Color.new(0,153,225)    
timer=new.Timer()

screen:print(200, 100, "Hello!", blue)
screen:flip() 
timer:start()

if timer==2000 then
screen:print(200, 50, "Hello!", blue)
screen:flip() 
end

while true do
screen.waitVblankStart()
end

For some reason the "screen.waitVblankStart(3 0)" doesn't really pause. Atleast its not working for me. Even if i put in 1 million its like there is just a "screen.waitVblankStart() "?

Not laughing at all people ask this all the time.

is that the code to help me or your code to get helped ?
i tryed to put it in the windows lua but dint worked

i m using windows lua becuase i m faster with it
the "screen.waitVblankStart(3 0)" works great with me
if i put

blue=Color.new(0,153,225)    

screen.waitVblankStart(30) 
screen:print(200, 50, "Hello!", blue)
screen:flip() 

while true do
screen.waitVblankStart()
end

it takes like 0.5 seconds to appear
the thing i want is how to make 1 appear 1st and make another word appear few seconds later with out disabling the 1st word

~EDIT~ baahh for some reason this forum is putting spaces inside () >.<

[natan333]

oh yeahhh the screen.waitVblankStart() dosent work with my lua v0.16 (dont get higher becuase i have 2.0)

[youresam]

Hey guys, I got a quick question. (And, whoever helps me with this scores a cool 500 points)

I need to know more about object orientation, and maybe an example on how to use the variable "self". And whats a metatable?

[natan333]

blue=Color.new(0,200,350)      
screen:clear() 
pad = Controls.read()
screen.flip()
screen:blit(90, 195, circle)
screen:print(200, 70, "Hello!", blue)
screen:flip()

if pad:cross() then
screen:blit(50, 228, x)
screen.flip()
end 


while true do
screen.waitVblankStart()
end

Im still trying to make the text stay and make appear another one but i m stuck in there
im also stuck at trying to make the Hello appear when i press X button
Can some one help pls
The code above is what im trying to put
The lua tutorial Is a great tutorial http://www.scriptscribbler.com/psp/lua/lesson02.htm but i dint understand the part to make buttons work to appear something ( Please Help )

[youresam]

That code is just messed up..

put the "while true do" at the top.
And put a "screen.flip()" right after "screen.waitVblankStart() " and remove ALL the other "screen.flip()"s.

[natan333]

Buahahahhahahahah I love you sam Thanks so Much

the code is

while true do
blue=Color.new(0,200,350)      
screen:clear()
pad = Controls.read()
if pad:cross() then
screen:print(200, 70, "Hello!", blue)
end


screen.waitVblankStart()
screen.flip()
end

I have some questions
it only shows hello when i pres X button is there a way to freeze it when i press X button?
"pad = Controls.read()" have to be in the top of the text/Object to work? or anywhere will work ?
and another question. the while to do on the top is to make it it true ? so it shows everything ?

[soadnation]

Hey guys, I got a quick question. (And, whoever helps me with this scores a cool 500 points)

I need to know more about object orientation, and maybe an example on how to use the variable "self". And whats a metatable?

what exactly do u mean by object orientation.

[natan333]

What do i need to do for the hello to appear 1st and the GoodBye to appear some seconds later when i hold X button?
the good tutorial dosent tell it so i m
This is the code that i m stuck at

while true do
blue=Color.new(0,200,350)      
screen:clear()
pad = Controls.read()
if pad:cross() then
screen:print(200, 70, "Hello!", blue)
screen.waitVblankStart(50)
screen:print(200, 100, "GoodBye!", blue)
end

if pad:start() then
break
end 

screen.waitVblankStart()
screen.flip()
end

[youresam]

what exactly do u mean by object orientation.

Basically you can create "objects" in lua instead of just variables. FOr example, thjink of the function screen:clear(). The defined function is Image.clear() and the params (would be, but its compiled..) Image.clear(self,color) (I think)
That is what im asking about. And to "add" your object, you call the metatable command..I forgot what though.

[youresam]

while true do
blue=Color.new(0,200,350)      
screen:clear()
pad = Controls.read()
if pad:cross() then
screen:print(200, 70, "Hello!", blue)
screen.flip()
screen.waitVblankStart(50)
screen:print(200, 100, "GoodBye!", blue)
screen.flip()
screen.waitVblankStart(50)
end

if pad:start() then
break
end 

screen.waitVblankStart()
screen.flip()
end

there, you forgot to flip the screen.

[natan333]

that code sam, both blinks 1st time then the top stop blinking and the bottom keep blinking

[natan333]

editted
now i understand the while true do and the End thing is to make it repeats
my question is: while its reapeating the text , is there a way to add another text to not to blink with it ? so its not in the same family

blue=Color.new(0,200,350)        

screen:clear()

screen:print(200, 70, "Hello!", blue)

while true do
screen.flip()
screen.waitVblankStart(30)
screen.flip()
screen.waitVblankStart(30)
end

I edited to explain better

[youresam]

Actually...that code might work.... if you put the hello on one side and goodbye on the other. And "while [condition] do" .. "end" means "while [condition] is true (correct) do this between 'while' and 'end'"

[natan333]

Actually...that code might work.... if you put the hello on one side and goodbye on the other. And "while [condition] do" .. "end" means "while [condition] is true (correct) do this between 'while' and 'end'"

i kinda understand though. is it possible for you make it with the code ? so i get what you mean . srry if you get mad, i just want to know the basics, the tutorial only goes to lesson 2 and dosent teach these stuff

[youresam]

i kinda understand though. is it possible for you make it with the code ? so i get what you mean . srry if you get mad, i just want to know the basics, the tutorial only goes to lesson 2 and dosent teach these stuff

I'll help you out tomorrow after school, what exactly do you want it to do?

[Grimfate126]

hey youaresam, i dunt understand the math.ceil function much.. so howo can you do this? if analog stik moves LEFT, the speed = speed-1 . if analog stik moves RIGHT, then speed = speed+1. thx!

[SjaakRake]

Somehow the following code never executes my main loop.

function textinput()

      screen:blit(0, 0, background, 0, 0, background:width(), background:height(), false)       --blit the background
      screen:blit(x,y, highlight ,0,0, highlight:width(), highlight:height(), true)             --blit the cursor
      
      if pad:right() and timer:time() > 75 then
         x = x + 10
         timer:reset(0)
         timer:start()
      end
      
      if pad:left() and timer:time() > 75 then
         x = x - 10
         timer:reset(0)
         timer:start()
      end
      
      if pad:down() and timer:time() > 75 then
         y = y + 12
         x = x + 5
         timer:reset(0)
         timer:start()
      end

      if pad:up() and timer:time() > 75 then
         y = y - 12
         x = x - 5
         timer:reset(0)
         timer:start()
      end

end

function Showstatus()
         screen:print(6,30,"x = " .. x .. "y = " .. y .. "keyboard =" .. keyboard,textColor)
end


--Main loop
while true do

Showstatus()
textinput()

if pad:start() then
   break
end

screen.waitVblankStart()
screen.flip()
end

Before this snippet are nothing but simple variable declarations.
Someone could point out the error? Thanks in advance.

(Meh, this looks too much as a kthnxplz topic)

[Bronx]

can any explain how i could ask a question in my lua game? i am gonna be making a trivia game (no details) and for example i might wanna ask "who is the president of the U.S." then i would give for options for an answer (mutiple choice) so i would be like "a- george bush, b-clinton, c- bob villa, d- Bronxbomber92" can any1 help me out with this? thanks

[SjaakRake]

well, that wouldn't be too hard. For instance, you could make a cursor, and by pressing up or down, making that move, while you increase or decrease a variable on the same time.

[soadnation]

do u want them to type in a.b.c. or d? cause if u do you are going to have to put a keyboard code in.

[Bronx]

do u want them to type in a.b.c. or d? cause if u do you are going to have to put a keyboard code in.

no, i just want them to press up or down and select which ones.
but my probablem kinda is i dont know how i would set this up so they have the choice of the questions. do u guys know wat i mean?

[SjaakRake]

Well, as I said, you could by pressing up and down, increase and decrease a variable, and compare that to the answer...

[Bronx]

ok ill try that, i am not to familiar with lua yet but i think i might be able to figure that out today! ill try but any more help would be appreciated still!

[SjaakRake]

You're welcome. Though, if you can't figure that one out, I would recommend you to get yourself some basic programming language techniques and master them.

Any can help me out on my problem, see previous page, last post?

[Bronx]

thanks i think i have the hang of it but i still get mixed up! lol

[b0xx0r]

Somehow the following code never executes my main loop.

function textinput()

      screen:blit(0, 0, background, 0, 0, background:width(), background:height(), false)       --blit the background
      screen:blit(x,y, highlight ,0,0, highlight:width(), highlight:height(), true)             --blit the cursor
      
      if pad:right() and timer:time() > 75 then
         x = x + 10
         timer:reset(0)
         timer:start()
      end
      
      if pad:left() and timer:time() > 75 then
         x = x - 10
         timer:reset(0)
         timer:start()
      end
      
      if pad:down() and timer:time() > 75 then
         y = y + 12
         x = x + 5
         timer:reset(0)
         timer:start()
      end

      if pad:up() and timer:time() > 75 then
         y = y - 12
         x = x - 5
         timer:reset(0)
         timer:start()
      end

end

function Showstatus()
         screen:print(6,30,"x = " .. x .. "y = " .. y .. "keyboard =" .. keyboard,textColor)
end


--Main loop
while true do

Showstatus()
textinput()

if pad:start() then
   break
end

screen.waitVblankStart()
screen.flip()
end

Before this snippet are nothing but simple variable declarations.
Someone could point out the error? Thanks in advance.

(Meh, this looks too much as a kthnxplz topic)

As you don't start the timer before the first if statement, none of the conditions will go through because the timer never actually gets started. If you need me to explain better, let me know.

[SjaakRake]

Haha, offcourse, I'm so stupid. Thanks, I oversaw that one. I thought by declaring it, it would start running right away.