Lua Programming Help Thread

[GuitarGod1134]

its still not working
Ok heres part of my code here

Quote:
if pad:r() then
computer = math.random(3,5)
end

but the problem is as soon as i press r my pic goes away and the variable returns to its orginal state. how can i make it so that one press of r and boom the pic stays blitted and the variable stays at the random selection. also i tried holding r and since its random it doesnt work it just keeps changing.
when i hold down r it keeps doing generating the random numbers. how can i make it so that once i hold down r it gets that number and sticks with it until r is let go???? HELP plz im soo close to v0.2 i even have a menu this stupid random thing is killin me.

[Grimfate126]

its still not working
Ok heres part of my code here

Quote:
if pad:r() then
computer = math.random(3,5)
end

but the problem is as soon as i press r my pic goes away and the variable returns to its orginal state. how can i make it so that one press of r and boom the pic stays blitted and the variable stays at the random selection. also i tried holding r and since its random it doesnt work it just keeps changing.
when i hold down r it keeps doing generating the random numbers. how can i make it so that once i hold down r it gets that number and sticks with it until r is let go???? HELP plz im soo close to v0.2 i even have a menu this stupid random thing is killin me.

ok, you can use oldpad, but its not very responsive, try this:

-- BEFORE YOUR MAIN LOOP, OUTSIDE OF ANY FUNCTIONS, PUT THIS --

pressedR = false

-- WHEREVER YOU DO "if pad:r() then..." put this--

if pad:r() then
     if not pressedR then
          computer = math.random(3,5)
     end 
          pressedR = true
else
     pressedR = false
end

[GuitarGod1134]

Thanks a bunch grim im gonna try it now.
-= Double Post =-

ROFL! HAHHAHAHAHAHAHAHAHAHAHA :ROFL: :ROFL: :ROFL: :ROFL: HAHAHAHA..

lol, sorry, couldnt hold myself there. NO, you keep it

math.randomseed(os.time())

random.randomseed is a function, you cant change it.

wow wasnnt that funny but yah on the code snippet i saw the funtion and the variable had a very similar name and as i skimmed down it pretty fast i got confused.

EDIT: Well worst has come to worst. I was pushing really hard to get v0.2 out but its 2 in the morning and I have a Algebra test and I still have spanish2 homework to do. So grim if you find out the problem in the code i gave you can u fix it? if so thanks o and i can send you the pics too.

[MSeven]

is it possible to do a collision with dofile, i have my bullet settings in one file and my game in another lua file. i want bullets to do collision with oobjects in my game file. how do i do that

can anyone asner my question
-= Double Post =-
anyone?

[ZereoX]

--Anwser to Yoyomacy
Actualy when doing dofile its like merging 2 files in 1 so you just have to make you function in one file then dofiles the other.So just do your collision check as if evcerything whas in the same file.

--My question--
here is my code i just don't under stand why it doesn't work.

--Define's Place
Red = Color.new(255,0,0)
Green =Color.new(0,255,0)
Blue = Color.new(0,0,255)
CurrentSelection = 1
MenuBG1 = Image.load("Menu/menu1.png")
MenuBG2 = Image.load("Menu/menu2.png")
oldpad = Controls.read()

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

--Menu1 Controls
if pad:down() and oldpad:down() ~= pad:down() then
CurrentSelection = CurrentSelection + 1
elseif CurrentSelection == 2 then
CurrentSelection = 1
elseif pad:up() and oldpad:up() ~= pad:up() then
CurrentSelection = CurrentSelection - 1
elseif CurrentSelection == 0 then
CurrentSelection = 2
end

if CurrentSelection == 1 then
screen:blit(0,0,MenuBG1)
elseif CurrentSelection == 2 then
screen:blit(0,0,MenuBG2)
end


screen.waitVblankStart()
screen.flip()
end

when i press up the screen goes black when i press down twice same thing.Any one know why?

[MSeven]

--Anwser to Yoyomacy
Actualy when doing dofile its like merging 2 files in 1 so you just have to make you function in one file then dofiles the other.So just do your collision check as if evcerything whas in the same file.

wow thanks for the great reply

also take out the ELSE from the elseif, see if that works

[ZereoX]

Thanks Yoyo it works. i don't know where my else if statement Fu** but il try do add some elseif statement until i get the error again so my code i shorther and i just have to remove maybe one elseif.

[Access_Denied]

ZeroX, you also need to add "oldpad = pad" at the end of your file.

[ZereoX]

Access_Denied i added Oldpad = Controls.read() at the begining of the code and my code works perfect.

[Yongobongo]

I need to know: Is it possible to set screen brightness in LUA? (like when you press the little button next to the note, the brightness adjuster) I need it for a power saving purposes :)

[GuitarGod1134]

Still got my q over here
its still not working
Ok heres part of my code here

Quote:
if pad:r() then
computer = math.random(3,5)
end

but the problem is as soon as i press r my pic goes away and the variable returns to its orginal state. how can i make it so that one press of r and boom the pic stays blitted and the variable stays at the random selection. also i tried holding r and since its random it doesnt work it just keeps changing.
when i hold down r it keeps doing generating the random numbers. how can i make it so that once i hold down r it gets that number and sticks with it until r is let go???? HELP plz im soo close to v0.2 i even have a menu this stupid random thing is killin me.

[Yongobongo]

Does anyone know how to set the brightness in LUA? I need it for power conserving feature for my next app

[GuitarGod1134]

Does anyone know how to set the brightness in LUA? I need it for power conserving feature for my next app

I dont really know but maybe you could put in the readme like set psp to power screen off or whatever after so and so minutes.

[TacticalPenguin]

What about that button right there that does it by itself?

[Grimfate126]

Does anyone know how to set the brightness in LUA? I need it for power conserving feature for my next app

umm, i think it would be easier for the user to just press the brightness key then press multiple buttons. besides, no homebrew so far has the need to go to extreme measuers just to "save" power. so unless youre makeing another halo, this is pretty much un-needed.

[HeaD_ShOt]

can sombody help me with my second program in Lua i made it based on the tutorial
it keeps coming up with an error
here it is
http://www.megaupload.com/?d=B9VYWJSZ

[GuitarGod1134]

still here!!!
--------------------------------------------------------------------------------

Still got my q over here
its still not working
Ok heres part of my code here

Quote:
if pad:r() then
computer = math.random(3,5)
end

but the problem is as soon as i press r my pic goes away and the variable returns to its orginal state. how can i make it so that one press of r and boom the pic stays blitted and the variable stays at the random selection. also i tried holding r and since its random it doesnt work it just keeps changing.
when i hold down r it keeps doing generating the random numbers. how can i make it so that once i hold down r it gets that number and sticks with it until r is let go???? HELP plz im soo close to v0.2 i even have a menu this stupid random thing is killin me.
__________________

[Access_Denied]

still here!!!
--------------------------------------------------------------------------------

Still got my q over here
its still not working
Ok heres part of my code here

Quote:
if pad:r() then
computer = math.random(3,5)
end

but the problem is as soon as i press r my pic goes away and the variable returns to its orginal state. how can i make it so that one press of r and boom the pic stays blitted and the variable stays at the random selection. also i tried holding r and since its random it doesnt work it just keeps changing.
when i hold down r it keeps doing generating the random numbers. how can i make it so that once i hold down r it gets that number and sticks with it until r is let go???? HELP plz im soo close to v0.2 i even have a menu this stupid random thing is killin me.
__________________

You have to use the oldpad method.

if pad:r() and oldpad:r() ~= pad:r() then
computer = math.random(3,5)
end

[MSeven]

i want a collision with the bullet and the spot1 spot2 spot3 spot4, i have tried over 60 times differant things it wont work, so here is the 2 file, bullet.ua and index.lua, as they work right now with no collision so the bullet does nothing but shoot

function bulletInfo()


bullet = Image.load("Bullet.png")


currentBullet = 0
direction = "right"


BulletInfo = {}
for a = 1,5 do
BulletInfo[a] = { pic = bullet , firing = false, direction = "right", x = spot.x + 32,
y = spot.y + 16 }
end

function bulletSetup()

if currentBullet < 5 then
currentBullet = currentBullet + 1
else
currentBullet = 1
end
if direction == "right" then
BulletInfo[currentBullet].x = spot.x + 32
BulletInfo[currentBullet].y = spot.y + 16
end

BulletInfo[currentBullet].direction = direction
BulletInfo[currentBullet].firing = true
end

function bulletFire()
for i = 1,5 do
if BulletInfo[i].firing == true then
if BulletInfo[i].direction == "right" then BulletInfo[i].x = BulletInfo[i].x + 10 end
screen:blit(BulletInfo[i].x,BulletInfo[i].y,BulletInfo[i].pic)
end
if BulletInfo[i].x < 0 or BulletInfo[i].x > 480 or BulletInfo[i].y < 0 or BulletInfo[i].y > 272 then BulletInfo[i].firing = false end
end
end
end

red = Color.new(255,0,0)
blue = Color.new(0,0,255)
green =Color.new(0,255,0)
white = Color.new(255,255,255)
speed = 100
score = 0
level = 1
obst1 = Image.load("enemy1.png")
obst2 = Image.load("enemy2.png")
obst3 = Image.load("enemy3.png")
obst4= Image.load("enemy4.png")
car = Image.load("play.png")
oldpad = Controls.read()
dofile("Bullet.lua")
bg = Image.load("bg.png")
bullet = Image.load("bullet.png")

System.usbDiskModeActivate()



spot  = {x = 10, y = 30, height = car:height(), width = car:width() }
spot1 = {x = 110, y = 120, height = obst1:height(), width = obst1:width()}
spot2 = {x = 130, y = 250, height = obst2:height(), width = obst2:width()}
spot3 = {x = 360, y = 250, height = obst3:height(), width = obst3:width()}
spot4 = {x = 470, y = 170, height = obst4:height(), width = obst4:width()}


function collisionCheck(object)
if (spot.x + spot.width > object.x) and (spot.x < object.x + object.width) and (spot.y + spot.height > object.y) and (spot.y < object.y + object.height) then
speed = speed - 1
end
end

bulletInfo()

bgy = 0

while true do
oldinput = input
input = Controls.read()

if input:select() then break end

screen:clear()
pad = Controls.read()

score = score + 1

if score>=500 and score<=500 then
level = level + 1 / 1
end

if score>=1100 and score<=1100 then
level = level + 1 / 1
end

if score>=1600 and score<=1600 then
level = level + 1 / 1
end

bgy = bgy - 2

if bgy<=-482 then
bgy = 0
end

if bgy>1 then
bgy = bgy - 481
end

collisionCheck(spot1)
collisionCheck(spot2)
collisionCheck(spot3)
collisionCheck(spot4)

if pad:up() and spot.y > 1 then
spot.y = spot.y - 5
end
if pad:down() and spot.y < 270 then
spot.y = spot.y + 5
end

if pad:cross() then
spot1.x = spot1.x - 6
spot2.x = spot2.x - 6
spot3.x = spot3.x - 6
spot4.x = spot4.x - 6
bgy = bgy - 5
end

spot1.x = spot1.x - 3
spot2.x = spot2.x - 3
spot3.x = spot3.x - 3
spot4.x = spot4.x - 3

if spot1.x < 0 then
spot1.x = math.random(480,520)
spot1.y = math.random(20,252)
end
if spot2.x < 0 then
spot2.x = math.random(480,520)
spot2.y = math.random(20,252)
end
if spot3.x < 0 then
spot3.x = math.random(480,520)
spot3.y = math.random(20,252)
end
if spot4.x < 0 then
spot4.x = math.random(480,520)
spot4.y = math.random(20,252)
end

screen:blit(bgy,0,bg)
screen:blit(bgy+bg:width(),0,bg)
screen:blit(spot1.x,spot1.y,obst1)
screen:blit(spot2.x,spot2.y,obst2)
screen:blit(spot3.x,spot3.y,obst3)
screen:blit(spot4.x,spot4.y,obst4)
screen:blit(spot.x,spot.y,car)


if pad:circle() and oldpad:circle() ~= pad:circle() then
bulletSetup()
end

bulletFire()

if score>=500 and score<=600 then
screen:print(220,150,"LEVEL UP",red)
end
if score>=1100 and score<=1200 then
screen:print(220,150,"LEVEL UP",red)
end
if score>=1600 and score<=1700 then
screen:print(220,150,"LEVEL UP",red)
end
screen:print(220,0,"Level: "..level,red)
screen:print(0,0,"plane health: "..speed,red)
screen:print(380,0,"score: "..score,red)
screen.waitVblankStart()
screen.flip()
oldpad = pad
end

[PSPgamer512]

can sombody help me with my second program in Lua i made it based on the tutorial
it keeps coming up with an error
here it is
http://www.megaupload.com/?d=B9VYWJSZ

What does the error message say?
never mind.
Right off the bat I found an error. When you where putting in you colors you did not capitalize the c.
This is what you put:

black = color.new(0, 0, 0)

What it needs to be:

black = Color.new(0, 0, 0)

[MSeven]

can someone help me on my problem 100k reward ;)

[ZereoX]

Yoyomacy can you send me the all the script/image.

[MSeven]

Yoyomacy can you send me the all the script/image.

that is the entire script, look at the page before this

[Access_Denied]

that is the entire script, look at the page before this

He wants the images to test the code. It would make it easier for me too.

[MSeven]

sent. ok anyone else?
-= Double Post =-
ok. 500k if anyone does it (and works.)

[LMelior]

Not too much different from what you were doing:

function bulletcollision(object)

for i = 1,5 do
	if BulletInfo[i].firing then
		if (BulletInfo[i].x + BulletInfo[i].pic:width() > object.x) and (BulletInfo[i].x < object.x + object.width) and (BulletInfo[i].y + BulletInfo[i].pic:height() > object.y) and (BulletInfo[i].y < object.y + object.height) then
			screen:print(100,100,"BAM!",white)
                        screen.waitVblankStart(6)
		end
	end
end

end

bulletcollision(spot1)
bulletcollision(spot2)
bulletcollision(spot3)
bulletcollision(spot4)

Not tested of course.

The function can go anywhere outside of your while loop, and the function calls go inside, probably right after the bulletFire() call near the bottom. You didn't specify what should happen if the bullets collide with the objects. :)

[MSeven]

Not too much different from what you were doing:

function bulletcollision(object)

for i = 1,5 do
	if BulletInfo[i].firing then
		if (BulletInfo[i].x + BulletInfo[i].pic:width() > object.x) and (BulletInfo[i].x < object.x + object.width) and (BulletInfo[i].y + BulletInfo[i].pic:height() > object.y) and (BulletInfo[i].y < object.y + object.height) then
			screen:print(100,100,"BAM!",white)
                        screen.waitVblankStart(6)
		end
	end
end

end

bulletcollision(spot1)
bulletcollision(spot2)
bulletcollision(spot3)
bulletcollision(spot4)

Not tested of course.

The function can go anywhere outside of your while loop, and the function calls go inside, probably right after the bulletFire() call near the bottom. You didn't specify what should happen if the bullets collide with the objects. :)

I LOVE YOU, IT WORKED THE FIRST TIME, 500k FOR YOU~!!!!!!!

[LMelior]

I LOVE YOU, IT WORKED THE FIRST TIME, 500k FOR YOU~!!!!!!!

Wow, thanks...you just multiplied my points by a factor of 100! :Jump:

[MSeven]

now you can get 300k

[HeaD_ShOt]

i need help with my new program
it isnt loading the images it keeps coming up with an eror what am i doing wrong

System.usbDiskModeActivat e()

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

background = Image.load("images/menu.png")
November = Image.load("images/nov.png")
December = Image.load("images/dec.png")
January = Image.load("images/jan.png")
Febuary = Image.load("images/feb.png")
March = Image.load("images/mar.png")
April = Image.load("images/apr.png")
May = Image.load("images/may.png")
June = Image.load("images/june.png")
July = Image.load("images/july.png")
August = Image.load("images/aug.png")
September = Image.load("images/sept.png")

screen:blit(0, 0, background, false)
screen.waitVblankStart()
screen.flip()

while to do
screen:blit(0, 0, background, false)