Lua Programming Help Thread

Zitat:

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Zitat von Glynnder

BTW, thats why the maximum fps you get see on a screen is 60 correct?

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Yes it is.

Zitat:

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Zitat von head_54us

SG57, do you know if the string.gmatch function is implemented in the latest PSP version of Luaplyer. I currently only have access to the Windows version and it doesn't seem to have it.


Use the millisecond timer and every time you get the number of ms from the timer, divide by 1000 to get the number of seconds.

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i cant display it on the screen tho.. i dunno what the variable is called, i dont really understand the link

Blah = Timer.new() -- Creates a new timer object called Blah. Starts from 0
Blah:start() -- Starts the timer
NumberOfMs = Blah:time() -- Gets the number of milliseconds from the timer since the timer started + the start value
NumberOfSec = math.floor(NumberOfMs /1000) -- Converts from Ms to Secs rounded down.

Zitat:

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Zitat von head_54us

Blah = Timer.new() -- Creates a new timer object called Blah. Starts from 0
Blah:start() -- Starts the timer
NumberOfMs = Blah:time() -- Gets the number of milliseconds from the timer since the timer started + the start value
NumberOfSec = math.floor(NumberOfMs /1000) -- Converts from Ms to Secs rounded down.

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thanx, so i use number of sec as the variable? and does it stop at 0?

Don't copy and paste that code into your program. I only wrote it to describe how to call and use the functions. You have to apply that knowledge to your code.

timer dont count down:

Code:

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levelTimer = Timer.new(100000)
levelTimer:start()
red = Color.new(255,0,0)
background = Image.load("cloud.png")
smiley = Image.load("smile.png")
sad = Image.load("sad.png")
math.randomseed(os.time())
rx = math.random(0,442)
ry = math.random(0,234)
boost = 1000
score = 0
x = 0
y = 5
NumberOfMs = levelTimer:time()
NumberOfSec = math.floor(NumberOfMs/1000)

function booster()
if boost < 1 then
boost = 0
end
boost = boost - 1
end

function CheckBoxCollisionHack()
        if ((x + 36) > rx) and (x < (rx + 36)) then
                if ((y + 36) > ry) and (y < (ry + 36)) then
                        return true
                end
        end
       
        return false
end

while true do

screen:clear()
screen:blit(0,0,background)
screen:print(0,263,"Press X for SPEED BOOST",red)
screen:print(0,0,"Boost Left: "..boost ,red)
screen:print(0,7,"Time: "..NumberOfSec,red)
screen:blit(x, y, smiley)
screen:blit(rx, ry, sad)

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They count up. These two lines are also incorrect in terms of where you put them in your code

Code:

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NumberOfMs = levelTimer:time()
NumberOfSec = math.floor(NumberOfMs/1000)

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Zitat:

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Zitat von head_54us

They count up. These two lines are also incorrect in terms of where you put them in your code

Code:

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NumberOfMs = levelTimer:time()
NumberOfSec = math.floor(NumberOfMs/1000)

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how the hell do i get it to count down? i got it to count up now...

Code:

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TotalTimeLimit = 100000

-- Later on in your code
NumberOfMs = levelTimer:time()
NumberOfSec = math.floor(NumberOfMs/1000)
TimeLeft = TotalTimeLimit - NumberOfSecs

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Seriously, these are really simple abstract problems that you should be able to solve yourself.

Zitat:

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Zitat von head_54us

Code:

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TotalTimeLimit = 100000

-- Later on in your code
NumberOfMs = levelTimer:time()
NumberOfSec = math.floor(NumberOfMs/1000)
TimeLeft = TotalTimeLimit - NumberOfSecs

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Seriously, these are really simple abstract problems that you should be able to solve yourself.

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total time limit has to be 200, 10000 makes the time go to 9999 and count down.
i wanted it at 100 and down
problem i solved myself :P

That's because you start the timer right at the start of your code, by the time the time left has started, the PSP has already spent 1sec loading in graphics and getting to the main loop.

Edit: Oh you meant you wanted 100 seconds. Nevermind then.

now i need to make the hi score save if its higher than the current hi score, how does this work?
-= Double Post =-
also, whats wrong with this:

Code:

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if TimeLeft < 1 then
screen:clear
screen:print(200,135,"Game Over, Your score was: "..score,red)
end

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g2g for lunch now.. ill check back here l8r for answers.

jaso you need a parentheses after the screen:clear so it looks like this screen:clear() and for the hi-score do something like this


if highscore < score then
highscore = score
end

Zitat:

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Zitat von mark.sparky

jaso you need a parentheses after the screen:clear so it looks like this screen:clear() and for the hi-score do something like this


if highscore < score then
highscore = score
end

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wouldnd it be:

Code:

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if highscore > score then
highscore = score
end

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but i guess it depends.

Zitat:

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Zitat von Grimfate126

wouldnd it be:

Code:

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if highscore > score then
highscore = score
end

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but i guess it depends.

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No, because then if the high score was greater than the score, the high score would be changed to the lower score.

no because that would be

if highscore is less than score then
highscore equals score
end

which doesnt make any sense

Zitat:

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Zitat von Grimfate126

wouldnd it be:

Code:

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if highscore > score then
highscore = score
end

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but i guess it depends.

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it still wouldnt save it, when i reset the game, the high score will go down to nil, i want it so it writes the high score to a file. also how would i read the contents of that file? (anyone who helps me will go down on a list of all the people that have helped me and they will get some credit for the finished game)

Zitat:

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Zitat von JaSo PsP

it still wouldnt save it, when i reset the game, the high score will go down to nil, i want it so it writes the high score to a file. also how would i read the contents of that file? (anyone who helps me will go down on a list of all the people that have helped me and they will get some credit for the finished game)

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write contents

score = io.open("score.txt","w")
score:write(highscore)
score:close()

read

highscore = io.open("score.txt","r")
thehighscore = highscore:read()
highscore:close()

With the read function, the variable "thehighscore" is you high score read from the file.

this works by the way:

Code:

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if TimeLeft < 1 then
levelTimer:stop()
screen:clear()
screen:print(200,100,"Game Over, Your Score was: "..score,red)
end

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-= Double Post =-

Zitat:

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Zitat von Access_Denied

write contents

score = io.open("score.txt","w")
score:write(highscore)
score:close()

read

highscore = io.open("score.txt","r")
thehighscore = highscore:read()
highscore:close()

With the read function, the variable "thehighscore" is you high score read from the file.

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thanx, this game is so near completion. ill submit it soon.

ps: what does the w and r mean on the io open brackets?

hi score works now

Zitat:

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Zitat von JaSo PsP

this works by the way:

Code:

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if TimeLeft < 1 then
levelTimer:stop()
screen:clear()
screen:print(200,100,"Game Over, Your Score was: "..score,red)
end

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-= Double Post =-


thanx, this game is so near completion. ill submit it soon.

ps: what does the w and r mean on the io open brackets?

hi score works now

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The "w" means write and the "r" means read

Go to evilmana.com and look at thier tutorial on reading and writing files. It'll give you a whole list of functions like that.

the w means write and the r means read but watch out because w means to overwite what was in that file and a means to write after what was already there

Zitat:

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Zitat von mark.sparky

the w means write and the r means read but watch out because w means to overwite what was in that file and a means to write after what was already there

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He wants the "w" though, because he wants to write over the existing high score.

i know i was just telling him in case he wanted to know.

Anway on to my problem. What is wrong with this code because the all the barricades appear at once and the score goes straight to the highest

Code:

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function firstLevel()
level1 = math.random( 1,60)
if level1 == 24 then
barricade[1].pic = true
barricade[2].pic = false
barricade[3].pic = false
barricade[4].pic = false
barricade[5].pic = false
barricade[6].pic = false
end
if level1 == 49 then
barricade[1].pic = false
barricade[2].pic = true
barricade[3].pic = false
barricade[4].pic = false
barricade[5].pic = false
barricade[6].pic = false
end
if level1 == 1 then
barricade[1].pic = false
barricade[2].pic = false
barricade[3].pic = true
barricade[4].pic = false
barricade[5].pic = false
barricade[6].pic = false
end
if level1 == 15 then
barricade[1].pic = false
barricade[2].pic = false
barricade[3].pic = false
barricade[4].pic = true
barricade[5].pic = false
barricade[6].pic = false
end
if level1 == 59 then
barricade[1].pic = false
barricade[2].pic = false
barricade[3].pic = false
barricade[4].pic = false
barricade[5].pic = true
barricade[6].pic = false
end
if level1 == 33 then
barricade[1].pic = true
barricade[2].pic = false
barricade[3].pic = false
barricade[4].pic = false
barricade[5].pic = false
barricade[6].pic = true
end
if barricade[1].pic == true then
barricade[1].lane = true
end
if barricade[1].lane == true then
screen:blit( barricade[1].x, barricade[1].y, barricade1)
barricade[1].x = barricade[1].x - 0.25
end
if barricade[1].x == 0 then
barricade[1].lane = false
end
if barricade[2].pic == true then
barricade[2].lane = true
end
if barricade[2].lane == true then
screen:blit( barricade[2].x, barricade[2].y, barricade1)
barricade[2].x = barricade[2].x - 0.25
end
if barricade[2].x == 0 then
barricade[2].lane = false
end
if barricade[3].pic == true then
barricade[3].lane = true
end
if barricade[3].lane == true then
screen:blit( barricade[3].x, barricade[3].y, barricade1)
barricade[3].x = barricade[3].x - 0.25
end
if barricade[3].x == 0 then
barricade[3].lane = false
end
if barricade[4].pic == true then
barricade[4].lane = true
end
if barricade[4].lane == true then
screen:blit( barricade[4].x, barricade[4].y, barricade1)
barricade[4].x = barricade[4].x - 0.25
end
if barricade[4].x == 0 then
barricade[4].lane = false
end
if barricade[5].pic == true then
barricade[5].lane = true
end
if barricade[5].lane == true then
screen:blit( barricade[5].x, barricade[5].y, barricade1)
barricade[5].x = barricade[5].x - 0.25
end
if barricade[5].x == 0 then
barricade[5].lane = false
end
if barricade[6].pic == true then
barricade[6].lane = true
end
if barricade[6].lane == true then
screen:blit( barricade[6].x, barricade[6].y, barricade1)
barricade[6].x = barricade[6].x - 0.25
end
if barricade[6].x == 0 then
barricade[6].lane = false
end
if lane == 0 and barricade[1].x <= (player[1].x + player[1].width) then
player[1].life = player[1].life - 1
barricade[1].x = 0
end
if lane == 1 and barricade[2].x <= (player[1].x + player[1].width) then
player[1].life = player[1].life - 1
barricade[1].x = 0
end
if lane == 2 and barricade[3].x <= (player[1].x + player[1].width) then
player[1].life = player[1].life - 1
barricade[1].x = 0
end
if lane == 3 and barricade[4].x <= (player[1].x + player[1].width) then
player[1].life = player[1].life - 1
barricade[1].x = 0
end
if lane == 4 and barricade[5].x <= (player[1].x + player[1].width) then
player[1].life = player[1].life - 1
barricade[1].x = 0
end
if lane == 5 and barricade[6].x <= (player[1].x + player[1].width) then
player[1].life = player[1].life - 1
barricade[1].x = 0
end
if lane ~= 0 and barricade[1].x <= (player[1].x + player[1].width) then
player[1].score = player[1].score + 2
player[1].lifescore = player[1].lifescore + 2
barricade[1].x = 0
if highscore < player[1].score then
highscore = highscore + 2
end
end
if lane ~= 1 and barricade[2].x <= (player[1].x + player[1].width) then
player[1].score = player[1].score + 2
player[1].lifescore = player[1].lifescore + 2
barricade[1].x = 0
if highscore < player[1].score then
highscore = highscore + 2
end
end
if lane ~= 2 and barricade[3].x <= (player[1].x + player[1].width) then
player[1].score = player[1].score + 2
player[1].lifescore = player[1].lifescore + 2
barricade[1].x = 0
if highscore < player[1].score then
highscore = highscore + 2
end
end
if lane ~= 3 and barricade[4].x <= (player[1].x + player[1].width) then
player[1].score = player[1].score + 2
player[1].lifescore = player[1].lifescore + 2
barricade[1].x = 0
if highscore < player[1].score then
highscore = highscore + 2
end
end
if lane ~= 4 and barricade[5].x <= (player[1].x + player[1].width) then
player[1].score = player[1].score + 2
player[1].lifescore = player[1].lifescore + 2
barricade[1].x = 0
if highscore < player[1].score then
highscore = highscore + 2
end
end
if lane ~= 5 and barricade[6].x <= (player[1].x + player[1].width) then
player[1].score = player[1].score + 2
player[1].lifescore = player[1].lifescore + 2
barricade[1].x = 0
if highscore < player[1].score then
highscore = highscore + 2
end
end
if player[1].lifescore == 40 then
player[1].life = player[1].life + 1
player[1].lifescore = 0
end
end

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i get an error with this... i was so close to releasing the game...

Code:

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if TimeLeft < 1 then
levelTimer:stop()
screen:clear()
if score > theHighScore then --this line brings up error
writeHiScore()
end
screen:print(150,100,"Game Over, Your Score was: "..score,red)
end

this line works with thehighscore??:
screen:print(270,263,"Hi Score: "..theHighScore,red)

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the error message says cant compare number with string but they are both variables!!??

Zitat:

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Zitat von JaSo PsP

i get an error with this... i was so close to releasing the game...

Code:

---

if TimeLeft < 1 then
levelTimer:stop()
screen:clear()
if score > thehighscore then --this line brings up error
writeHiScore()
end
screen:print(150,100,"Game Over, Your Score was: "..score,red)
end

---

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What's the error?

Zitat:

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Zitat von Access_Denied

What's the error?

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cant compare string with number but they are both variables? or, it doesnt recognice the hiscore in the txt document as a number? how can i sort this out?

a string is usually a line of characters (a.b.c.d. ect...) Also where are you declaring those two variables? That could be the problem as well

You need if score < thehighscore then instead of if score > thehighscore then and also have you put

file = io.open("the highscore file","w")
file:write(thehighscore)
file:close()

in the code and just to tell you < is less than and > is greater than

these are the variables at the start. theres nothing wrong cos it can display them in the game:

Code:

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highscore = io.open("hiscore.txt","r")
theHighScore = highscore:read() --this is where it reads the file, it doesnt read it as a number
score = 0

---

-= Double Post =-

Zitat:

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Zitat von mark.sparky

You need if score < thehighscore then instead of if score > thehighscore then and also have you put

file = io.open("the highscore file","w")
file:write(thehighscore)
file:close()

in the code and just to tell you < is less than and > is greater than

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yer, it cant read the info in the document as a number, help!

u probably declared the value of either "score" or "theHighScore" as a string.

post the code where u declare the vars.

well have you put a number in the highscore text

Zitat:

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Zitat von JaSo PsP

these are the variables at the start. theres nothing wrong cos it can display them in the game:

Code:

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highscore = io.open("hiscore.txt","r")
theHighScore = highscore:read() --this is where it reads the file, it doesnt read it as a number
score = 0

---

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Im not great with lua but you opened the file with an "r" tag? Wont that mean you can only read?

Zitat:

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Zitat von JaSo PsP

these are the variables at the start. theres nothing wrong cos it can display them in the game:

Code:

---

highscore = io.open("hiscore.txt","r")
theHighScore = highscore:read() --this is where it reads the file, it doesnt read it as a number
score = 0

---

-= Double Post =-


yer, it cant read the info in the document as a number, help!

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NVM, read mark.sarpkys post.

here:

Code:

---

levelTimer = Timer.new(100000)
levelTimer:start()
red = Color.new(255,0,0)
background = Image.load("cloud.png")
smiley = Image.load("smile.png")
sad = Image.load("sad.png")
math.randomseed(os.time())
rx = math.random(0,442)
ry = math.random(0,234)
highscore = io.open("hiscore.txt","r")
whighscore = io.open("hiscore.txt","w")
theHighScore = highscore:read()
boost = 2000
score = 0
x = 0
y = 5
TotalTimeLimit = 130

---

-= Double Post =-

Zitat:

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Zitat von mark.sparky

well have you put a number in the highscore text

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yes i have, it was 0 but i changed it to 10 and thats all thats there.

cmon help me!!!

The problem here is that when you read from a file, its reading it in as a string, not a number. Therefore you cannot compare a number with the string.

Zitat:

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Zitat von head_54us

The problem here is that when you read from a file, its reading it in as a string, not a number. Therefore you cannot compare a number with the string.

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so how can i save a high score?

At the moment I am looking for a string to number/integer function in Lua (I really don't fancy writing one myself) but can't find any.

Zitat:

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Zitat von head_54us

At the moment I am looking for a string to number/integer function in Lua (I really don't fancy writing one myself) but can't find any.

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k, im gonna fishish off the game and post it without the hiscore thing.
-= Double Post =-
what do i write to make the whole thing restart? well?

Note that this code is for a standalone project only. You MUST press start to exit otherwise the file doesn't not get saved:

Code:

---

WHITE = Color.new(255, 255, 255)

highscore = io.open("hiscore.txt","r")
theHighScore = highscore:read("*number")
highscore:close()

currentScore = 0

while true do

    PspPadState = Controls.read();

    if PspPadState:start() then
            break;
        end
       
        if PspPadState:circle() then
            currentScore = currentScore + 1
        end

        screen:clear(WHITE)
        screen:print(1,1, "High Score    " .. theHighScore)
        screen:print(1,9, "Current Score " .. currentScore)
       
        screen.waitVblankStart();
        screen.flip();
end

if currentScore > theHighScore then
    highscore = io.open("hiscore.txt","w")
    highscore:write(currentScore)
    highscore:close()
end

---

Zitat:

---

Zitat von head_54us

Note that this code is for a standalone project only. You MUST press start to exit otherwise the file doesn't not get saved:

Code:

---

WHITE = Color.new(255, 255, 255)

highscore = io.open("hiscore.txt","r")
theHighScore = highscore:read("*number")
highscore:close()

currentScore = 0

while true do

    PspPadState = Controls.read();

    if PspPadState:start() then
            break;
        end
       
        if PspPadState:circle() then
            currentScore = currentScore + 1
        end

        screen:clear(WHITE)
        screen:print(1,1, "High Score    " .. theHighScore)
        screen:print(1,9, "Current Score " .. currentScore)
       
        screen.waitVblankStart();
        screen.flip();
end

if currentScore > theHighScore then
    highscore = io.open("hiscore.txt","w")
    highscore:write(currentScore)
    highscore:close()
end

---

---

it works but the mem stik light keeps flashing, when i exit the app after bout 10 seconds of flashing it has saved the score?
-= Double Post =-
sorted it out with the flashing..