Lua Programming Help Thread

[PSPduh]

in a standalone eboot the "break" command simply restarts the lua application.

Ohhh ok. Then I have no idea.

[Jeremy1026]

Ohhh ok. Then I have no idea.

it is actually a good thing to have in your code as u edit, so u dont have to reboot your game to test the changes, just press start. gets rid of the time it takes to display the gameboot.

[Grimfate126]

actually "break" doesnt exit the program. it only exits the loop. so if u had two loops, it would transfer the control to the other loop.
-= Double Post =-
okay, n00b question:

this is my code:

-- loaded images

health1 = 100
health2 = 100

hit1 = "false"
hit2 = "false"

-- added the bullet stuff

function collision()

for g = 1, 10 do
if (BulletInfo[g].x < Player[2].x + 32) and (BulletInfo[g].x > Player[2].x) and (BulletInfo[g].y < Player[2].y + 32) and (BulletInfo[g].y + 5 > Player[2].y) then
BulletInfo[g].firing = false
hit2 = "true"
end 
end

for h = 1, 10 do
if (BulletInfo2[h].x < Player[1].x + 32) and (BulletInfo2[h].x > Player[1].x) and (BulletInfo2[h].y < Player[1].y + 32) and (BulletInfo2[h].y > Player[1].y) then
BulletInfo2[h].firing = false
hit1 = "true"
end 
end

end


function health()

if health1 < 0 then 
health1 = 0
end

if health2 < 0 then 
health2 = 0
end

if (hit1 == "true") then
health1 = health1 - 10
hit1 = "false"
end

if (hit2 == "true") then
health2 = health2 - 10
hit2 = "false"
end

if health1 == 0 then
screen:clear()
screen:blit(0, 0, win2)
fire = false
end

if health2 == 0 then
screen:clear()
screen:blit(0, 0, win1)
fire = false
end

end


while true do

collision()
health()

screen.waitVblankStart()
screen.flip()
end

the problem is, even if one bullet hit the enemy, his health goes all the way down to 0 insted of just lowering by 10.

help.

[Access_Denied]

How about in your function collision, instead of "hit2 = "true"" or "hit1 = "true"", just put, health1 = health1 - 10

[TheEmulatorGuy]

You can exit from LuaPlayer using os.exit()

You have to use unofficial Luaplayer versions, such as v0.17dk2 by Dark Killer or v0.20 mod by Cools, both of which have a System.Quit() function (Cools got his from Dark Killer's) that "exits Lua Player back to the psp browser." I haven't tested this yet but I assume it works. I'm sure somebody here could confirm this.

I never saw the point of that function when you could just use os.exit()

[Access_Denied]

You can exit from LuaPlayer using os.exit()

Darnet! I wished I known that earlier. Too late now, I've already coded the program. It would be too much work to put that in. Guess I'll have to settle with the home button.

[TheEmulatorGuy]

Darnet! I wished I known that earlier. Too late now, I've already coded the program. It would be too much work to put that in. Guess I'll have to settle with the home button.

This gives me more incentive to kill the people who gave the wrong advice.

[Branin]

Hey, i just said the break function didnt work.. im no uber leet progger so dont kill me, BTW, does that acctualy work?

[TheEmulatorGuy]

Hey, i just said the break function didnt work.. im no uber leet progger so dont kill me, BTW, does that acctualy work?

I wasn't referring to you. Yes, it does work. I use it in ID3PSP.

[Grimfate126]

How about in your function collision, instead of "hit2 = "true"" or "hit1 = "true"", just put, health1 = health1 - 10

then the same thing happens.

[Jeremy1026]

Darnet! I wished I known that earlier. Too late now, I've already coded the program. It would be too much work to put that in. Guess I'll have to settle with the home button.

you would be adding like, 4 lines of code at most, 10 times...

[Access_Denied]

No, I would have to reconfigure 2 menus and change graphics again, and I've already had to do it twice, so I'm tired of doing it.

[Glynnder]

I was gonna reccomend system.quit

[Hedzx]

im trying to add a timer in my script, but i put this in :

counter = Timer.new()
counter:start()

if counter > 1000 then
screenrint(12,0,"> 1", black)
end

but i get

error: fight.lua:16: attempt to compare number with userdata

wtf?! ive used timers before but this has never happened

[Glynnder]

sorry, i cant help you, i've never used a timer in anything, cos i do games not apps, its not really used in apps.

But i will be using it in luamainframe2

[PSPduh]

@Noobkiller, it's because you are comparing the timer itself. It needs to be:

if counter:time() > 1000 then
--do stuff here
end

[Aphonia]

if counter:time() > 1000 then

[Glynnder]

already bin answered
-= Double Post =-

 -- default options]]
options = { navspeed = 1, autoscroll = "on", netlib = "off", wavlib = "off", bmplib = "off", diskmode = "off", start2quit="on", lowbattpercent = 3, overclock = "off", scetrick = "yes" }

-- possible options for menu
possibleOptions = {
  navspeed = {
    displayName = "NavSpeed",
    values = { 1, 2, 3, 4, 5, 6, 7, 8, 9 } },
  autoscroll = {
    displayName = "Auto-Scroll",
    values = { "on", "off" } },
  netlib = {
    displayName = "Load Netlib",
    values = { "on", "off" } }
  wavlib = {
    displayName = "Load Wavlib",
    values = { "on", "off" } }
  bmplib = {
    displayName = "Load bmplib",
    values = { "on", "off" } }	
  diskmode = {
    displayName = "USB at start",
    values = { "on", "off" } }
  start2quit = {
    displayName = "Start restarts luaplayer",
    values = { "on", "off" } }
  lowbattpercent = {
    displayName = "Low battery %",
    values = { 1, 2, 3, 4, 5, 6, 7, 8, 9 } }
  overclock = {
    displayName = "Overclock PSP?",
    values = { "off", "222", "266", "333" } }
  scetrick = {
    displayName = "Using __SCE__ trick?",
    values = { "yes", "no" } }
}

why isn't this working?
-= Double Post =-
anybody?

[Jeremy1026]

whats you error glynnder?

[Glynnder]

sys.lua:24: '}' expected to close '{' at line 11 near 'bmplib'

line 11 is bmplib = {
displayName = "Load bmplib",
values = { "on", "off" } }

but even when i quote that so line 11 is diskmode or whatever, it still doesnt work

[altunozara]

Ok...i decided to start coding again...but i need help...i need someone to help me make a 2 player simple game like...hmm...just a screen with lots of dots and 2 players withg a points count for each one and they collect the dots...and theres a timer at the top...please pm me if you will make this game...but lead me through it...so take it as a learning expirience...so whatever you do tell me what and how and what it does....

please pm me...thx

[Glynnder]

shouldn't you do that to help familiarise yourself with the code again?

[LMelior]

You can exit from LuaPlayer using os.exit()

I never saw the point of that function when you could just use os.exit()

This just completely freezes my PSP in Luaplayer 0.20. What version do you use it in?

EDIT: I just tried System.Quit() using Cools' Luaplayer 0.20 and it works. So maybe Luaplayer 0.17dk2 didn't need that function but Luaplayer 0.20 mod by Cools does?

[Glynnder]

nothing seems to work in 0.20

[LMelior]

Oh yeah, as for your problem Glynnder (if you didn't fix it yet), you stopped using commas after each table entry.

[Access_Denied]

I have a question about reading .txt files. I have a program that reads an entire .txt file. That works fine. But, when it prints to the screen, it's one longe line. Is there a way that I can make it skip to the next line forming a paragraph?
Also, in the .txt file, I have it in paragraph form. But when it prints to the screen, at the end of the first line, I see a Musical note symbol and a big "O" printed in black with a white square around it. Does anyone know what that is?

[SG57]

1. LUA Player is limited to that (see why LUA sucks dirt?) so you must make your own 'return' function, very easy though.

2. That musical note thing is *nix operator character of '\n' meaning 'newline'. ('\b' backspace, '\t' tab, etc.)...

I will make you such a function once I go and learn how LUA makes 2d arrays, to parse the 'text' you put in into a 2d array, and for every music note found, skip a line down and keep printing... Sorry i cant right now though, I didnt learn all of LUA's syntax back when i only knew it...

Until then, back to 3d Zelda clone......

[Hedzx]

hmm... my timer is f uped...... i put it after the loop, and it goes like 4 then 8 then 12 then 6 wtf? doesnt it go by thousands? and why is mine going by ones? i used :

counter = Timer.new()
counter:start()

if counter:time() > 4000 then
screenrint(40,30,"> 4000",black)
counter:reset(0)
end

[Access_Denied]

I think you put these lines before the loop.

counter = Timer.new()
counter:start()

[Hedzx]

im about to commit suicide from stupidity last question:

how can i make a random number load... i.e a number bettween 1 and 3 eighter 1, 2, or 3 ?