Lua Programming Help Thread

[SG57]

can some1 post all the functions explain them to me thoroly

[slicer4ever]

yea same here

[MagicianFB]

can some1 post all the functions explain them to me thoroly

Here's the ones specific to luaplayer:
http://luaplayer.org/functions.txt

These two are sort of the same, although some time I find the second link easier to understand:
http://www.lua.org/pil/
http://www.lua.org/manual/5.0/

[Virtue]

You should be able to understand the functions. You didn't even say please, you just asked a VERY big task of us, or basically told us to do that. Which functions do you not understand?

[Master Inuyasha]

Okay, i need help with my bullet moement code. Now, i can make the bullet shoot out of the plane, no matter where it is located, but now i must make it MOVE! And you guys can help me, hopefully!

Okay, here is a snidbit.


elseif pad:r() then
if shoot >= 1 then
-- Blit the rest of the stuff you do as if you weren't shooting
-- don't know what all those images are so just add more screen:blit()
updateMove()
screen:blit(btXpos, btYpos, bullet1)
screen:blit(pcXpos, pcYpos, sprite)
screen.waitVblankStart()
screen.flip()
bl = bl + 1
shoot = shoot - 1
end
--that is to shoot^
elseif pad:triangle() then
if shoot <=0 then
shoot = shoot + 1
end
--that is to recharge shot^

--Functions
Bullet1 = function()

btYpos = btYpos + 2
updateMove()
screen:blit(btXpos, btYpos, bullet1)
screen.waitVblankStart()
screen.flip()
bl = bl + 1
end

--A function I made^

--Bullet System
while true do
if bl == 1 then do
Bullet1()

--What calls the function^

Somehow everytime i run the game, my PSP freezes up, im not using lua player, i am using my own eboot. It is an old one. Should i update my lua eboot with the new lua player? PLease, help me, and thanks in advance!!!

[SG57]

well just some1s for a game, common ones used alot u kno so wat r they

[Twenty 2]

There are never common functions for a game because you have to make your own functions... Work on your english a little too.

[Master Inuyasha]

uh twenty 2 are you talking to me?

[SG57]

1st tht wasnt thorough 'make ur own' 2nd, i thot u were supposed to help not critisize

[Master Inuyasha]

I wasnt criticising anyone, I was just asking twenty 2 if he was talking to me. Also, i you were talking to him about the english bit, listen to him, he has got a point. This isnt AOL talk, this is a forum, where spelling and grammer counts alot, and if you spell bad or diss users, people lose respect for you. At first, I would not spell great or talk AOL talk. But one user told me that you will lose respect that way, and guess what, I improved my act, and you should to. And dont throw a fight just because someone sugested you should clean up your english, he didnt say "Hey asswipe, you better speak better, or I wont help you" He just simply said to improve a little. I hope you understand my point, like a fellow user in these forums did. Because, i couldnt understand a couple of your posts above.

On topic, may someone help me with my code above? Thanks.

[Twenty 2]

1st tht wasnt thorough 'make ur own' 2nd, i thot u were supposed to help not critisize

Sorry it was just hard to understand you...
What i ment is that a function can be ANYTHING. For example:

function addone()
if adding==true then x=x+1 end
end

Then in your main coding you could say:

if moving==true then addone() end

I thought you were also making a halo sidescroller, shouldnt you know this?
And i wasnt talking to you master Inu.

[Master Inuyasha]

oh okay, well, um if you can can you help me. What my code demonstrates it me trying to get the bullet system to work, but to no avail, and that is not my entire coding, as i dont feel like sharing it with everyone. If you would like the whole code, I would be glad to pm it to you, just as long as someone helps me with this. Also, good luck on the Falo project!

[xigency]

can someone help me it keeps saying its running the script but nuttin comes up

i am using lua the latest lua

heres my code

umm...

if input:oldinput() then

do you mean ...? i dont even know what you mean hmmm...

and

read:input()

looks like a typo of readInput()

also....

function readinput()
input = Controls.read() 
if input:oldinput() then
if input:left() and listpos > 1 then
listpos = listpos - 1
end

if input:right() and listpos < table.getn(gunlist) then
listpos = listpos + 1
end

oldinput = input
end

is missing an end


same answer as in the other thread you made

[SG57]

my fault anyway but how would i make an arc function you dont have to tell me i cud figure it out but take a lil more time

[SG57]

also, sorry everyone, my computers broken and im on fired up browser and it crashes when typing alot so please forgive me

[Cablekevin]

--Colors
yellow = Color.new(255, 255, 0)
--Colors

--Defining Code
screen:print(194, 136, "Loading: 0%", yellow)
screen.flip()
background = Image.load("Images/Backgrounds/background.png")

screen:clear()
screen:print(194, 136, "Loading: 10%", yellow)
screen.flip()
object1 = Image.load("Images/Base_Blue/Structures/barracade_small.png")

screen:clear()
screen:print(194, 136, "Loading: 20%", yellow)
screen.flip()
object2 = Image.load("Images/Base_Blue/Structures/barracade_small.png")

screen:clear()
screen:print(194, 136, "Loading: 30%", yellow)
screen.flip()
player = Image.load("Images/Base_Blue/Vehecles/Suddan_Tank_Left_Down.png")

screen:clear()
screen:print(194, 136, "Loading: 40%", yellow)
screen.flip()
object4 = Image.load("Images/Base_Blue/Structures/Main_Base.png")

screen:clear()
screen:print(194, 136, "Loading: 50%", yellow)
screen.flip()
object5 = Image.load("Images/Base_Blue/Structures/adv. power plant_1.png")

screen:clear()
screen:print(194, 136, "Loading: 60%", yellow)
screen.flip()
sidebar = Image.load("Images/Base_Blue/Misc/sidebar.png")
intro = Image.load("Images/Misc/intro.png")

screen:clear()
screen:print(194, 136, "Loading: 80%", yellow)
screen.flip()
Start_Menu = Image.load("Images/Misc/Start_Menu.png")

screen:clear()
screen:print(194, 136, "Loading: 100%", yellow)
screen.flip()
Bigfoot_Music = Sound.load("Music/bigfoot.wav")

--Ende Defining Code

--Player Spawn
x = 50
y = 50
x_object = {0, 100, 200}
y_object = {0, 100, 200}

--End Player Spawn

--Main Code

while true do
	screen:clear()
	pad = Controls.read()
	-- showing the background + objects
	screen:blit(x_object[1], y_object[1], background)
	screen:blit(x_object[2], y_object[2], object1)
	screen:blit(x_object[3], y_object[3], object2)
	screen:blit(x_object[3], y_object[1], object4)
	screen:blit(x_object[2], y_object[3], object5)
	screen:blit(x_object[3], y_object[2], object1)

	-- showing the player
	screen:blit(x, y, player)
	if pad:up() then 
		y = y - 1
		if y < 50 then
			for i= 3,1,-1 do
				y_object[i] = y_object[i] + 1
			end
		y = y + 1
		end
	end
	if pad:down() then 
		y = y + 1
		if y > 222 then
			for i=3,1,-1 do
				y_object[i] = y_object[i] - 1
			end
		y = y - 1
		end
	end
	if pad:right() then 
		x = x + 1
		if x > 430 then
			for i=3,1,-1 do
				x_object[i] = x_object[i] - 1
			end
		x = x - 1
		end
	end
	if pad:left() then 
		x = x - 1
		if x < 50 then
			for i=3,1,-1 do
				x_object[i] = x_object[i] + 1
			end
		x = x + 1
		end
	end

	if pad:select() then	
	break
	end


										--Sidebar
										screen:blit(370, 0, sidebar)
											screen.flip()
										--End Sidebar
	if pad:start() then
	screen:blit(0, 0, Start_Menu)
	screen.flip()
	screen.waitVblankStart(160  )
	end

Ok this is the code.
Now i have a problem.
Its a scroling map i know but if i come outside the map its black.
How can i change it ?
Or how can i large the map ?
And how do i make positions so that the "buildings" are stuck on the map that they move with the map ?

[Sir Crx]

Ive got a small question.

My problem is that I want to press a button then around 1/2-1 second later a image to be blit. I don't know the code for it and ive been looking around for a while.

I was wondering if theres a way to do it?

[Master Inuyasha]

Okay do this

image = Image.load("image.png")

pad = Controls.read()

if pad:cross() then
screen.waitVblankStart(60 )
screen:blit(x, y, image, false)
end

That should do it. There are 60 Vblanks in one second! (x, y) are the coordinates for the picture. Hope that helped!

[Sir Crx]

If I do vblankstart it renders all my controls useless and it wont let me do anything.

[Sir Crx]

Ok well doing vblankstart is what i did before I even posted and it didnt work but for some reason after like 5 hours of changing things around it finally works.

Yet I have 2 MORE noob questions:

1) if I use the vblankstart for the delay in the image blit when I hold down the button it will flash the picture then go back to waiting, then blit it again. Its in a non stop vblankstart then blit mode. All I want is just to wait then blit it. Yet using vblankstart doesnt seem to do that.

2)If I blit too many images at once in a somewhat small space they tend to not show up if i do it fast. Yet if I go really slow in pushing the buttons i can successfully get all of them to show, but the point of my game is to move fast to blit all the images when the buttons are pushed but they tend to show whenever they feel like it.

I hope I portrayed my problem well. If not im willing to answer questions because this is the only thing holding me back from completinga major part in my code.

Thanks in advance

[simmcity]

ok i dont know if this is noob question or not, (probably is), ok so is there a way to to write so that whenever a the cursor goes on a certian picture it can trigger a command if the x button is pressed such as opening another image without writing something like this

if x0 < 80 then
if x0 > -10 then
if y0 < 242 then
if y0 > 215 then

EDIT, nvm allready figured out how to do it.

[Master Inuyasha]

yeah, i know the feeling, because, actually, no one has answered my question, but its allright, i like helping people. I dont know what the problem it is. Very strange...

[slicer4ever]

k i'm back finally my comp got all mean to me in a better way to put it so i did what he said and what do u mean missing an end well maybe explaining what im trying to do well help so here it is what i'm trying to do is make something where if you push left it will blit the a certain picture left and keep going but if i press right it will go back one picture and if i push left it will go forward a picture so thats wheat i'm trying to do i'll be glad to answer questions if it helps also it still just says running script anyway so you dont gatta go back a page or 2 to find my code i well post it here i havnt really made any changes to it because my dam comp's been screwey anywho here it is

System.usbDiskModeActivat e()

blue=Color.new(0,0,255)

oldinput = Controls.read()
input = Controls.read()
screen:clear()
gun1=Image.load("pics/gun1.png")
gun2=Image.load("pics/gun2.png")
gun3=Image.load("pics/gun3.png")
gun4=Image.load("pics/gun4.png")
gun5=Image.load("pics/gun5.png")
gun6=Image.load("pics/gun6.png")
gun7=Image.load("pics/gun7.png")
gun8=Image.load("pics/gun8.png")
gun9=Image.load("pics/gun9.png")
gun10=Image.load("pics/gun10.png")
gun11=Image.load("pics/gun11.png")
gun12=Image.load("pics/gun12.png")
gun13=Image.load("pics/gun13.png")
gun14=Image.load("pics/gun14.png")
gun15=Image.load("pics/gun15.png")
gun16=Image.load("pics/gun16.png")
gunlist = {gun1, gun2, gun3, gun4, gun5, gun6, gun7, gun8, gun9, gun10, gun11, gun12, gun13, gun14, gun15, gun16}
listpos = 1

function readinput()
input = Controls.read()
if input:oldinput() then
if input:left() and listpos > 1 then
listpos = listpos - 1
end

if input:right() and listpos < table.getn(gunlist) then
listpos = listpos + 1
end

oldinput = input
end

function drawgun()
screen:blit(0,0,gunlist[listpos])
screen.flip()
end

while not input:start() do
readinput()
drawgun()
screen.waitVblankStart()
screen:clear()
end
end

[Sir Crx]

Ok well doing vblankstart is what i did before I even posted and it didnt work but for some reason after like 5 hours of changing things around it finally works.

Yet I have 2 MORE noob questions:

1) if I use the vblankstart for the delay in the image blit when I hold down the button it will flash the picture then go back to waiting, then blit it again. Its in a non stop vblankstart then blit mode. All I want is just to wait then blit it. Yet using vblankstart doesnt seem to do that.

2)If I blit too many images at once in a somewhat small space they tend to not show up if i do it fast. Yet if I go really slow in pushing the buttons i can successfully get all of them to show, but the point of my game is to move fast to blit all the images when the buttons are pushed but they tend to show whenever they feel like it.

I hope I portrayed my problem well. If not im willing to answer questions because this is the only thing holding me back from completinga major part in my code.

Thanks in advance

Since we started a new page I think people might forget my problem so im posting it again. Not to be a jerk, just to bump the chacne of my question being answered.

Thanks again

[aldebaran]

Hi folks!
I'm writing an application in LUA with LUAEDIT and I'd like to test it on my PC before putting it in the PSP, but...
how can I simulate on my PC the commands for the PSP (cross, square, x and triangle or whatever) in order to see if everything is OK?
I don't like to move each time the .lua file because I don't want to change the paths of the images)

[lingon]

ok i dont know if this is noob question or not, (probably is), ok so is there a way to to write so that whenever a the cursor goes on a certian picture it can trigger a command if the x button is pressed such as opening another image without writing something like this

if x0 < 80 then
if x0 > -10 then
if y0 < 242 then
if y0 > 215 then

Just the same problem as I have...I'll tell you if I find a way

[TeamOverload]

Hi folks!
I'm writing an application in LUA with LUAEDIT and I'd like to test it on my PC before putting it in the PSP, but...
how can I simulate on my PC the commands for the PSP (cross, square, x and triangle or whatever) in order to see if everything is OK?
I don't like to move each time the .lua file because I don't want to change the paths of the images)

http://lumo2000.lu.funpic.de/luaplay...ows_alpha2.zip

it is kindof buggy though

[aldebaran]

http://lumo2000.lu.funpic.de/luaplay...ows_alpha2.zip

it is kindof buggy though

I did it, but I can't see any differences in this release...
so how can I play the buttons when I have my .lua program working in the DOS windows?

[monster356]

http://lumo2000.lu.funpic.de/luaplay...ows_alpha2.zip

it is kindof buggy though

how do i use it?

[SG57]

can any1 help me with an arc function?
something like

functionArc()
arrow =

soemthing like that i dunno can someone help please?:icon_sad: