Lua Programming Help Thread

[Grimfate126]

i think you have to do something like this

if letterPosy < 2 then letterPosy = 2 end
if letterPosy > 269 then letterPosy = 269 end
if letterPosx < 2 then letterPosx = 2 end
if letterPosx > 477 then letterPosx = 477 end

same as a arrow or an object to stop at a location, but have no idea to make it disapear after it stops

anyways
guys I have a background set up and I draw like a filled red square above it.
I want to erease half of the filled red square with an arreaser picture so one of the half of the square will be red and the other part will replease the backgroung.
not like to erease with a white color, but using the background to errease something and to look the same after erased

is it possible to do it ?

thats not what i meant. :)

i meant like: a have a square (which is the player) and a couple of red things coming at you ( enemies) i want it so that if ONE or more of the squares(there are ten at the moment) hit you, then gameover = true. but the enemies pass right through the player without doing anything.

[ZereoX]

Hi i have a little prob

--Colours
white = Color.new(255,255,255)
red = Color.new(255,0,0)
pad = Controls.read()
--Text
screen:print(5,50,"Producer",white)
screen:print(5,65,"Zereo_X",red)
screen:print(5,75,"Special Thanks to",white)
screen:print(5,90,"xodiac21,Grimfate126,Sousanator,EminentJonFrost",red)
screen:print(0,250,"Press X to exit",red)
screen.flip()

while true do
screen.waitVblankStart()
end

if pad:cross()
dofile("Test.lua")
end

its just won't go back to Test.lua when i press X what is that can som1 help.

[natan333]

if pad:r() and pad:square() then 
if eraser and arrow then
picture = 2
end
end

guys wasnt this code supposed to go to picture 2 if arrow is inside erease picture ?
or something like this

if pad:r() and pad:square() and picture == 2 then 
if eraser >= arrow and arrow <= eraser then
picture = 2
end
end

but it gives me error =/
is there a way though ?
i would like to know becuase my way to make picture 2 work is guessing a imaginary retangle y and x and it takes long to find it =/

[ZereoX]

i think you have to do somthing like Eraserinarrow = eraser+arrow+1 then

if pad:r() and pad:square() and Eraserinarrow == 1 then
picture = 2
end
end
Really not shure it may(70%) not work.

[PopcOrn DeVil]

if pad:r() and pad:square() and picture == 2 and eraser >= arrow and arrow <= eraser then
picture = 2
end

I'm pretty sure that's right.

[EminentJonFrost]

Hi i have a little prob

--Colours
white = Color.new(255,255,255)
red = Color.new(255,0,0)
pad = Controls.read()
--Text
screen:print(5,50,"Producer",white)
screen:print(5,65,"Zereo_X",red)
screen:print(5,75,"Special Thanks to",white)
screen:print(5,90,"xodiac21,Grimfate126,Sousanator,EminentJonFrost",red)
screen:print(0,250,"Press X to exit",red)
screen.flip()

while true do
screen.waitVblankStart()
end

if pad:cross()
dofile("Test.lua")
end

its just won't go back to Test.lua when i press X what is that can som1 help.

you forgot to put './' just before "Test.lua"

so it would be:

if pad:cross()
dofile("./Test.lua")
end

[EminentJonFrost]

if pad:r() and pad:square() and picture == 2 and eraser >= arrow and arrow <= eraser then
picture = 2
end

I'm pretty sure that's right.

??
Are you sure thats right?
lol

maybe

if pad:r() and pad:square() and eraser >= arrow and arrow <= eraser then
picture = 2
end

[PopcOrn DeVil]

Yeah well he put it in his original if statement for some reason.

[EminentJonFrost]

Yeah well he put it in his original if statement for some reason.

oh thats right..
well, maybe thats what causes the error.
we'll have to hear from ZereoX.

[HaxxBlaster]

Does anyone know about working objects that turn in to "Nil objects" when put the PSP to sleepmode, then back on again?

[ZereoX]

EminentJonFrost,i never added a ./ in my other script and it works perfect but this one just won't work

[natan333]

??
Are you sure thats right?
lol

maybe

if pad:r() and pad:square() and eraser >= arrow and arrow <= eraser then
picture = 2
end

still getting error with that :Cry:

[montrob]

Does anyone know about working objects that turn in to "Nil objects" when put the PSP to sleepmode, then back on again?

just a guess.. never tried it.. but maybe

 if sleepmode == true then
"object" = nil
end
if sleepmode == false then
"object" = 'sumtin here'
end

[Grimfate126]

can ANYBODY help me?????

[ZereoX]

EminentJonFrost,Lol look what i did

if pad:cross() <----Forgot then
dofile("Test.lua")
end

[Altair]

try this:

i have another problem(yay), but i solved my other one. my currnet problem:

my collision detection wont work. here is my code:

math.randomseed(os.time())

a = 0
b = 0
d = 1
e = 1
f = 1
g = 1

x = 1
y = 120
x32 = x+50
y32 = y+50

spike = {}

for c = 1,10 do
x2 = 0
y2 = 0
spike[c] = { a = math.random(100), b = math.random(100), x2 = math.random(2000), y2 = math.random(240), x232 = x2+a, y232 = y2+b} 
end

for h = 1,10 do

if x32>=spike[h].x2 and x<=spike[h].x2 and y32 =spike[h].y2 and y<=spike[h].y2 then
gameover = true
end

end

if gameover == true then
break

i have defined everything. but the objects pass right through the player..

pls help me..

I changed all the spike[h].y232 into spike[h].y2 basicly.

[EminentJonFrost]

EminentJonFrost,Lol look what i did

if pad:cross() <----Forgot then
dofile("Test.lua")
end

lol
amazing how little things escape our attention..

[ZereoX]

OK hi,Im making a card game but how do i do so that there random cards at the start like
you receive one of those cards at start
then after wards i can say how much that random card is wort.

Aceclover = image.load("cards/AceClover.png")
Acediamond = image.load("cards/AceDiamond.png")
Aceheart = image.load("cards/Aceheart.png")
Acespade = image.load("cards/AceSpade.png")
Twoclover = image.load("cards/2Clover.png")
Twodiamond = image.load("cards/2Diamond.png")
Twoheart = image.load("cards/2Heart.png")
Twospade = image.load("cards/2Spade.png")
Threeclover = image.load("cards/3Clover.png")
Threediamond = image.load("cards/3Diamond.png")
Threeheart = image.load("cards/3Heart.png")
threeSpade = image.load("cards/3Spade.png")
Fourclover = image.load("cards/4Clover.png")
Fourdiamond = image.load("cards/4Diamond.png")
Fourheart = image.load("cards/4Heart.png")
Fourspade = image.load("cards/4Spade.png")
Fiveclover = image.load("cards/5Clover.png")
Fivediamond = image.load("cards/5Diamond.png")
Fiveheart = image.load("cards/5Heart.png")
Fivespade = image.load("cards/5Spade.png")
Sixclover = image.load("cards/6Clover.png")
Sixdiamond = image.load("cards/6Diamond.png")
Sixheart = image.load("cards/6Heart.png")
Sixspade = image.load("cards/6Spade.png")
Sevenclover = image.load("cards/7Clover.png")
Sevendiamond = image.load("cards/7Diamond.png")
Sevenheart = image.load("cards/7Heart.png")
Sevenspade = image.load("cards/7Spade.png")
Heightclover = image.load("cards/8lover.png")
Heightdiamond = image.load("cards/8Diamond.png")
Heightheart = image.load("cards/8heart.png")
Heightspade = image.load("cards/8Spade.png")
Nineclover = image.load("cards/9Clover.png")
Ninediamond = image.load("cards/9Diamond.png")
Nineheart = image.load("cards/9Heart.png")
Ninespade = image.load("cards/9Spade.png")
Tenclover = image.load("cards/10Clover.png")
Tendiamond = image.load("cards/10Diamond.png")
Tenheart = image.load("cards/10Heart.png")
Tenspade = image.load("cards/10Spade.png")
Jackclover = image.load("cards/JackClover.png")
Jackdiamond = image.load("cards/JackDiamond.png")
Jackheart = image.load("cards/JackHeart.png")
Jackspade = image.load("cards/JackSpade.png")
Queenclover = image.load("cards/QueenClover.png")
Queendiamond = image.load("cards/QueenDiamond.png")
Queenheart = image.load("cards/QueenHeart.png")
Queenspade = image.load("cards/QueenSpade.png")
Kingclover = image.load("cards/QueenClover.png")
Kingdiamond = image.load("cards/KingDiamond.png")
Kingheart = image.load("cards/KingHeart.png")
Kingspade = image.load("cards/KingSpade.png")

[EminentJonFrost]

OK hi,Im making a card game but how do i do so that there random cards at the start like
you receive one of those cards at start
then after wards i can say how much that random card is wort.

Aceclover = image.load("cards/AceClover.png")
Acediamond = image.load("cards/AceDiamond.png")
Aceheart = image.load("cards/Aceheart.png")
Acespade = image.load("cards/AceSpade.png")
Twoclover = image.load("cards/2Clover.png")
Twodiamond = image.load("cards/2Diamond.png")
Twoheart = image.load("cards/2Heart.png")
Twospade = image.load("cards/2Spade.png")
Threeclover = image.load("cards/3Clover.png")
Threediamond = image.load("cards/3Diamond.png")
Threeheart = image.load("cards/3Heart.png")
threeSpade = image.load("cards/3Spade.png")
Fourclover = image.load("cards/4Clover.png")
Fourdiamond = image.load("cards/4Diamond.png")
Fourheart = image.load("cards/4Heart.png")
Fourspade = image.load("cards/4Spade.png")
Fiveclover = image.load("cards/5Clover.png")
Fivediamond = image.load("cards/5Diamond.png")
Fiveheart = image.load("cards/5Heart.png")
Fivespade = image.load("cards/5Spade.png")
Sixclover = image.load("cards/6Clover.png")
Sixdiamond = image.load("cards/6Diamond.png")
Sixheart = image.load("cards/6Heart.png")
Sixspade = image.load("cards/6Spade.png")
Sevenclover = image.load("cards/7Clover.png")
Sevendiamond = image.load("cards/7Diamond.png")
Sevenheart = image.load("cards/7Heart.png")
Sevenspade = image.load("cards/7Spade.png")
Heightclover = image.load("cards/8lover.png")
Heightdiamond = image.load("cards/8Diamond.png")
Heightheart = image.load("cards/8heart.png")
Heightspade = image.load("cards/8Spade.png")
Nineclover = image.load("cards/9Clover.png")
Ninediamond = image.load("cards/9Diamond.png")
Nineheart = image.load("cards/9Heart.png")
Ninespade = image.load("cards/9Spade.png")
Tenclover = image.load("cards/10Clover.png")
Tendiamond = image.load("cards/10Diamond.png")
Tenheart = image.load("cards/10Heart.png")
Tenspade = image.load("cards/10Spade.png")
Jackclover = image.load("cards/JackClover.png")
Jackdiamond = image.load("cards/JackDiamond.png")
Jackheart = image.load("cards/JackHeart.png")
Jackspade = image.load("cards/JackSpade.png")
Queenclover = image.load("cards/QueenClover.png")
Queendiamond = image.load("cards/QueenDiamond.png")
Queenheart = image.load("cards/QueenHeart.png")
Queenspade = image.load("cards/QueenSpade.png")
Kingclover = image.load("cards/QueenClover.png")
Kingdiamond = image.load("cards/KingDiamond.png")
Kingheart = image.load("cards/KingHeart.png")
Kingspade = image.load("cards/KingSpade.png")

can you clarify a bit more?
this part: "after wards i can say how much that random card is wort"
i dont get it.

[ZereoX]

i mean that a random card apears then if its a 2Spade then i can say to lua that its wort 2 points

[SG57]

do an array. Ex:

Deck = {}
Deck[1] = AceSpades
Deck[2] = AceHearts
etc..
 
x = random.time(1,52) --w/e the random number function is and how to pick 2 numbers to get a random number from.
Deck[x]

Basically, do an array that holds all the cards. Use the random number function and have a variable be the card to draw, and chagne that variable via a random number. Since my LUA is very rusty, my array is probably rong, and probably combined with the C form of an array, but still, you get the concept i hope.

[Grimfate126]

try this:



I changed all the spike[h].y232 into spike[h].y2 basicly.

that doesnt work either

[natan333]

guys is there a way to make

if pad:r() and pad:square() then
if letterPosx >= 238 and letterPosx <= 260 and letterPosy >= 20 and letterPosy <= 40 then
picture = 3
end
end

to work only 1 time ? so next time it press that place it dosent work

[ZereoX]

how can i make a image moves from one place to an other.

[TheMarioKarters]

how can i make a image moves from one place to an other.

Oh come on, try reading some tutorials.

[EminentJonFrost]

how can i make a image moves from one place to an other.

depends
do want it to move by itself, under your control, what?

[ZereoX]

By it self so that the card starts from the pile and place it self at my desired location

[EminentJonFrost]

By it self so that the card starts from the pile and place it self at my desired location

you mean like solitiare?
when you press a button, it goes from the deck to right beside it?

[ZereoX]

Like this from deck to where player cards are and a other cards goes to dealer side.

[Grimfate126]

ok, i figured out what was wrong with my code, but i dont know how to fix it. my old code:

for c = 1,100 do
spike[c] = { a = math.random(100), b = math.random(100), x2 = math.random(400, 20000), y2 = math.random(240), x232 = x2+a, y232 = y2+b, firing = true} 
end

it thought that it had to take the x2 and y2 and a and b values i had defined as 0. i TRIED to do this:

for c = 1,100 do
spike[c] = { a = math.random(100), b = math.random(100), x2 = math.random(400, 20000), y2 = math.random(240),

x232 = spike[c].x2+spike[c].a, y232 = spike[c].y2+spike[c].b

, firing = true}
end

BUT, now it gives me an error: test.lua:37:attempt to perform arithematic global on (?) a nil value.

wtf?
help pls.. thx