Lua Programming Help Thread

[Ace Hih]

nevermind I just forgot to add a quotation on my image.

[Twenty 2]

You never declared face or facing as a variable before the while true do loop. I dont think you can declare them in that loop.

[HaxxBlaster]

Why won't it load the menu background image?

---- Menu set
function menu()
screen:blit(200, 100, menu)
while true do
	screen.waitVblankStart()
	screen.flip()
end

---- Menu load

	if pad:start() then
        menu()
	end

[Master Inuyasha]

Why won't it load the menu background image?

---- Menu set
function menu()
screen:blit(200, 100, menu)
while true do
	screen.waitVblankStart()
	screen.flip()
end

---- Menu load

	if pad:start() then
        menu()
	end

function menu()
  while true do
    screen:blit(200,100,menu)
    screen.waitVblankStart()
    screen.flip()
  end
end

[HaxxBlaster]

It says bad argument.
But i got the picture and all..

[Master Inuyasha]

Why don't you just blit the picture when you press the start button?

[Twenty 2]

It says bad argument.
But i got the picture and all..

Are you loading the pic in your variables? like:
menu = Image.load("menu.png")

[HaxxBlaster]

Are you loading the pic in your variables? like:
menu = Image.load("menu.png")

Yes, of course.
I pm you the whole script.

[HaxxBlaster]

Why don't you just blit the picture when you press the start button?

Because if i want to change stuff it would be alot easyer to put i like that.
And it's just the start of the menu.

[Ace Hih]

Ok I got a new problem I neeed the character to punch and I got the image for the Punching but I'm not sure how to make it show the punch and then go back to the regular standing picture. If you need to see the script just say so and I'll post it up. Can someone help me?

[soadnation]

im just starting to get into lua programing(i was starting to a while ago but stoped) and im trying to make a menu. when i use to do the C tutorials in the forum someonje told me how to make a menu which i vagly remember. im trying to put what i do know into a menu in lua. when i look over my code it makes sense to me but then again. i wrote it. i tried launching it with the windows lua player and it just pops up then exits. when i put it in my pspit says no cript file found but it is in there with the right name. i was wondering if any of you could see a problem with it(im sure you will)

--set menu option
green = Color.new(0, 255, 0)
color = Color.new(255, 255, 255)
Menustatus=0
pad = Controls.read()


if pad:down() then
	menustatus = menustatus + 1
	if menustatus == 2 then
		menustatus = 0
	end
end
if pad:up() then
	menustatus == menustatus - 1
	if menustatus == 0
		menustatus = 2
	end
end

--Make Menu

if menustatus == 0 then
	screen:print(160, 100, "Play", color)
	screen:print(160, 120, "Info", green)
	screen:print(160, 140, "Exit, green)
	screen.flip()
end

if menustatus == 1 then
	screen:print(160, 100, "Play", green)
	screen:print(160, 120, "Info", color)
	screen:print(160, 140, "Exit", green)
	screen.flip()
end

if menustatus == 2 then
	screen:print(160, 100, "Play", green)
	screen:print(160, 120, "Info", green)
	screen:print(160, 140, "Exit", color)
	screen.flip()
end

--Select Options

if pad:cross() then
	if menustatus == 0 then
		dofile("./data/game.lua")
	end
	if menustatus == 1 then
	screen:print(160, 100, "Info", green)
	end
	if menustatus == 2 then
		break
	end
end
	
while true do
	screenVblankStart()
end

[Master Inuyasha]

If your using 2.0, downgrade to 1.5
From there, launch your lua App/Game
It shouldn't pop-up with "No Script File Found", it should tell you the line of code that it is tring to process, but can't(the line has an error in it).

BTW, put your menu code in your while true do statement...that might be the error.

[soadnation]

adding the while true didnt work. unlease i put it in the wrong spot. i would downgrade but id have to wait till this weakend

[Koba]

i don't know if this question has already been asked but i blitted an image to the screen, its just white test with a black border and when i viewed it, the images was all distorted and green, anybody know how to fix this?

[soadnation]

Im using the twintail lua editor and it shows me the errors. i fixed two of the problems. it was just an extra "=" sign in one of the aprts and i forgot a quote when printing to the screen. now i get a wierd error. it says there is no loop for the end to break on line 56.(red one in the code) when i delete it it says the same thing for the end that is now on loine 56(this will be the orange one). when i delete both of them it says there is no loop to break near the while statement.but while doesnt break a loop.

green = Color.new(0, 255, 0)
color = Color.new(255, 255, 255)
Menustatus=0
pad = Controls.read()

--set menu option

if pad:down() then
	menustatus = menustatus + 1
	if menustatus == 2 then
		menustatus = 0
	end
end
if pad:up() then
	menustatus == menustatus - 1
	if menustatus == 0
		menustatus = 2
	end
end

--Make Menu

if menustatus == 0 then
	screen:print(160, 100, "Play", color)
	screen:print(160, 120, "Info", green)
	screen:print(160, 140, "Exit, green)
	screen.flip()
end

if menustatus == 1 then
	screen:print(160, 100, "Play", green)
	screen:print(160, 120, "Info", color)
	screen:print(160, 140, "Exit", green)
	screen.flip()
end

if menustatus == 2 then
	screen:print(160, 100, "Play", green)
	screen:print(160, 120, "Info", green)
	screen:print(160, 140, "Exit", color)
	screen.flip()
end

--Select Options

if pad:cross() then
	if menustatus == 0 then
		dofile("./data/game.lua")
	end
	if menustatus == 1 then
	screen:print(160, 100, "Info", green)
	end
	if menustatus == 2 then
		break
	end
end
	
while true do
	screenVblankStart()
end

[Master Inuyasha]

Try some more stuff, you'll get it soon ;)
Oh, remember, when you fix it, remember what you did. Just incase it happens again.

[wicked_fable]

lol, I know this sounds stupid, but I think I forgot hot to do a Hello World script. I wrote:

print("Hello World")

I am new to using LUAEdit so maybe that is the problem, but I figured it is better than going with notepad since I get lazy checking to see if my code is correct. It keeps saying: HINT- Begin of Script- but I don't understand what it means. Did I write it wrong or is LUAEdit just screwed up? I have done a Hello World before on NotePad and never got this problem.

EDIT:

By the way, I'm pressing "Run Script" just so you know. I got rid of the intrepretor and don't know where to download it again so I assumed LUAEdit would be a good intrepetor.

EDIT2:

I just realized something. LUAEdit isn't meant to be used by itself, is it? Do I need to download the current LUA version in order to write code properly to format to the PSP and computer? I'm sorry, but I just started using LUAEdit, I'm more accustomed to just the simple NotePad, but now I want to use something fancy.

[soadnation]

ok i found one more problem but it was just another simple mistake. forgot to put a ":" in the screen wait part at the end and when i delete the last part

--Select Options

if pad:cross() then
	if menustatus == 0 then
		dofile("./data/game.lua")
	end
	if menustatus == 1 then
	screen:print(160, 100, "Info", green)
	end
	if menustatus == 2 then
		break
	end
end

it will start but it freezes my psp even if i la8unch it from lua player

also do u think i sould just combined the part i deleted with this part?

--Make Menu

if menustatus == 0 then
	screen:print(160, 100, "Play", color)
	screen:print(160, 120, "Info", green)
	screen:print(160, 140, "Exit, green)
	screen.flip()
end

if menustatus == 1 then
	screen:print(160, 100, "Play", green)
	screen:print(160, 120, "Info", color)
	screen:print(160, 140, "Exit", green)
	screen.flip()
end

if menustatus == 2 then
	screen:print(160, 100, "Play", green)
	screen:print(160, 120, "Info", green)
	screen:print(160, 140, "Exit", color)
	screen.flip()
end

[Master Inuyasha]

lol, I know this sounds stupid, but I think I forgot hot to do a Hello World script. I wrote:

print("Hello World")

I am new to using LUAEdit so maybe that is the problem, but I figured it is better than going with notepad since I get lazy checking to see if my code is correct. It keeps saying: HINT- Begin of Script- but I don't understand what it means. Did I write it wrong or is LUAEdit just screwed up? I have done a Hello World before on NotePad and never got this problem.

EDIT:

By the way, I'm pressing "Run Script" just so you know. I got rid of the intrepretor and don't know where to download it again so I assumed LUAEdit would be a good intrepetor.

EDIT2:

I just realized something. LUAEdit isn't meant to be used by itself, is it? Do I need to download the current LUA version in order to write code properly to format to the PSP and computer? I'm sorry, but I just started using LUAEdit, I'm more accustomed to just the simple NotePad, but now I want to use something fancy.

Heres the code

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

screenrint(1, 1, "Hello World", black)
screen.flip()

[wicked_fable]

Geez, no wonder, I really did forget hot to use the print function. Thanks for reminding me, that wouldhave been very stupid if I could add text to my games, lol.

[SG57]

Im using the twintail lua editor and it shows me the errors. i fixed two of the problems. it was just an extra "=" sign in one of the aprts and i forgot a quote when printing to the screen. now i get a wierd error. it says there is no loop for the end to break on line 56.(red one in the code) when i delete it it says the same thing for the end that is now on loine 56(this will be the orange one). when i delete both of them it says there is no loop to break near the while statement.but while doesnt break a loop.

green = Color.new(0, 255, 0)
color = Color.new(255, 255, 255)
Menustatus=0
pad = Controls.read()
 
--set menu option
 
if pad:down() then
	menustatus = menustatus + 1
	if menustatus == 2 then
		menustatus = 0
	end
end
if pad:up() then
	menustatus == menustatus - 1
	if menustatus == 0
		menustatus = 2
	end
end
 
--Make Menu
 
if menustatus == 0 then
	screen:print(160, 100, "Play", color)
	screen:print(160, 120, "Info", green)
	screen:print(160, 140, "Exit, green)
	screen.flip()
end
 
if menustatus == 1 then
	screen:print(160, 100, "Play", green)
	screen:print(160, 120, "Info", color)
	screen:print(160, 140, "Exit", green)
	screen.flip()
end
 
if menustatus == 2 then
	screen:print(160, 100, "Play", green)
	screen:print(160, 120, "Info", green)
	screen:print(160, 140, "Exit", color)
	screen.flip()
end
 
--Select Options
 
if pad:cross() then
	if menustatus == 0 then
		dofile("./data/game.lua")
	end
	if menustatus == 1 then
	screen:print(160, 100, "Info", green)
	end
	if menustatus == 2 then
		break
	end
end
end 
while true do
	screenVblankStart()
end

well do you ahve a previous loop or is that a function or what? it might also help to just add an extra end to the end where i added the green end and see if it works

[soadnation]

ok i pinpoted the problem down to exit funtion(if pad.start() break). when i delete4 it it lodss. kindof. when it loads it just freezes right away this i have no idea what could be causeing it.

[HaxxBlaster]

I get stuck on a "Jump Function", i have been trying to get it to work all day, i get freaking nuts..

I simply want my character to jump up and down on a button release.
Please help me out guys, so i can continue with my game.

And if it turn out good i may be release it in public.


My code looked something like this.

if pad:cross() then
time = time + 1
yP = yP - time
if time == 70 then
time = 0
yP = yP + time
if time == 70 then
time = 0
end
end
end

[Master Inuyasha]

Geez, no wonder, I really did forget hot to use the print function. Thanks for reminding me, that wouldhave been very stupid if I could add text to my games, lol.

Thats alright, it happens to the best of us.

[c5cha7]

Sorry about this guys but
i have a problem....
Can someone tell me how to make a collision
for a image this big 66x63???
here's my code for the collsion
(I need it to make the collsion work all around my square)

w2 = 30
h2 = 30
x2 = 170
y2 = 200
w1 = 20
h1 = 20

function collision(x1, y1, w1, h1, x2, y2, w2, h2)
if (y2 >= y1 and y1 + h1 >= y2) 
or (y2 + h2 >= y1 and y1 + h1 >= y2 + h2) 
or (y1 >= y2 and y2 + h2 >= y1) 
or (y1 + h1 >= y2 and y2 + h2 >= y1 + h1) 
then if x2 >= x1 and x1 + w1 >= x2 then return true 
elseif x2 + w2 >= x1 and x1 + w1 >= x2 + w2 then return true 
elseif x1 >= x2 and x2 + w2 >= x1 then return true 
elseif x1 + w1 >= x2 and x2 + w2 >= x1 + w1 
then return true 
end 
end 
return false 
end

screen:blit(x2, y2, col)

   if pad:right() and collision(x1, y1, w1, h1, x2, y2, 1, h2) == false then 
   walkRight() x1=x1+1.5

Please Note that i stripped my code so here's just the important bit's
of my collision. My player doesnt hit the square and he can
walk right through it And there is only one barrier and not four..

Anyhelp at all would be highly appreciated!
and maybe if your help is good enough i will donate my points :icon_wink

[Altair]

Ok i just started with LUA and its fun, but i just don't get something:

How do you let the program go back? Like in BASIC you can use "goto ...". But can i use that in LUA, or do i use something else?

And another thing. First everuthing worked. Then i changed some code to improve my prog. but now i "starts" weird. Lowser says it's running it, but it won't show any image. However if i push start a couple of times it askes to press start to restart. Also when i press L, the it gives the message "Disk mode active. Press L to exit.". Now why is that? And by Disk Mode does it mean UsbDiskMode, because thats the only thing i can think of?

Thx in advance!

Altair

[Altair]

@HaxxBlaster
There needs to be an extra "=" at the second "if time = 70". It needs to be "if time == 70".

[HaxxBlaster]

@HaxxBlaster
There needs to be an extra "=" at the second "if time = 70". It needs to be "if time == 70".

Yes i know, but i just wrote is down of what i remember of it .
I don't get any error, it just don't work like i want.

[nathan42100]

Ok i just started with LUA and its fun, but i just don't get something:

How do you let the program go back? Like in BASIC you can use "goto ...". But can i use that in LUA, or do i use something else?

And another thing. First everuthing worked. Then i changed some code to improve my prog. but now i "starts" weird. Lowser says it's running it, but it won't show any image. However if i push start a couple of times it askes to press start to restart. Also when i press L, the it gives the message "Disk mode active. Press L to exit.". Now why is that? And by Disk Mode does it mean UsbDiskMode, because thats the only thing i can think of?

Thx in advance!

Altair

1: use functions
2: You obviously aren't running anything or you don't have a
screen.waitVblankStart()

in the loop
3: That is lowser's USB disk mode.

[nathan42100]

Im using the twintail lua editor and it shows me the errors. i fixed two of the problems. it was just an extra "=" sign in one of the aprts and i forgot a quote when printing to the screen. now i get a wierd error. it says there is no loop for the end to break on line 56.(red one in the code) when i delete it it says the same thing for the end that is now on loine 56(this will be the orange one). when i delete both of them it says there is no loop to break near the while statement.but while doesnt break a loop.

green = Color.new(0, 255, 0)
color = Color.new(255, 255, 255)
Menustatus=0
pad = Controls.read()

--set menu option

if pad:down() then
	menustatus = menustatus + 1
	if menustatus == 2 then
		menustatus = 0
	end
end
if pad:up() then
	menustatus == menustatus - 1
	if menustatus == 0
		menustatus = 2
	end
end

--Make Menu

if menustatus == 0 then
	screen:print(160, 100, "Play", color)
	screen:print(160, 120, "Info", green)
	screen:print(160, 140, "Exit, green)
	screen.flip()
end

if menustatus == 1 then
	screen:print(160, 100, "Play", green)
	screen:print(160, 120, "Info", color)
	screen:print(160, 140, "Exit", green)
	screen.flip()
end

if menustatus == 2 then
	screen:print(160, 100, "Play", green)
	screen:print(160, 120, "Info", green)
	screen:print(160, 140, "Exit", color)
	screen.flip()
end

--Select Options

if pad:cross() then
	if menustatus == 0 then
		dofile("./data/game.lua")
	end
	if menustatus == 1 then
	screen:print(160, 100, "Info", green)
	end
	if menustatus == 2 then
		break
	end
end
	
while true do
	screen.waitVblankStart()
end

Fixed, Problem with the screen vblank start stuff