Lua Programming Help Thread

[genaga]

hey grim what ever happened ot ASSault ?

[yaustar]

Memory is freed when the data is no longer referenced by any variables.

eg:

image1 = Image.load("blah.png");
image2 = image1;

image1 = nil;

The image has NOT been unloaded / freed from memory since image2 still references to the data.

image2 = nil;

The image is no longer referenced by any variables and the garbarge collection now frees the memory where the image was.

[Grimfate126]

hey grim what ever happened ot ASSault ?

ive done as much as i can. now im waiting on nexis to let me use his bsp engine. :)

[c5cha7]

Memory is freed when the data is no longer referenced by any variables.

eg:

image1 = Image.load("blah.png");
image2 = image1;

image1 = nil;

The image has NOT been unloaded / freed from memory since image2 still references to the data.

image2 = nil;

The image is no longer referenced by any variables and the garbarge collection now frees the memory where the image was.

Thanks, that worked!
I guess i am going to have to try and reduce how many images
i load in future .

[TacticalPenguin]

Yea ttr has a lot of loading/unloading images since it has like 60 different images used throughout the game.

[Access_Denied]

Memory is freed when the data is no longer referenced by any variables.

eg:

image1 = Image.load("blah.png");
image2 = image1;

image1 = nil;

The image has NOT been unloaded / freed from memory since image2 still references to the data.

image2 = nil;

The image is no longer referenced by any variables and the garbarge collection now frees the memory where the image was.

Just take out the semi-colons. That's C only.

[TacticalPenguin]

Actually lua CAN have them but they aren't needed.

[myschoo]

high = io.open("high.txt","r")
highscore = high:read()
high:close()

if score > highscore then
high = io.open("high.txt","w")
high:write(score)
high:close()
end

when i try this it tells me
error: cant compare string with number, whats the problem...pls help!

[TacticalPenguin]

high = io.open("high.txt","r")
highscore = high:read("*n")
high:close()

if score > highscore then
high = io.open("high.txt","w+")
high:write(score)
high:close()
end

[myschoo]

its still tells me something with compare... o_O

[TacticalPenguin]

Well adding in the *n makes it read the file as a number. How exactly does the first line of the hscore.txt file look?

[myschoo]

sry mate my mistaek it works ... ;)

[TacticalPenguin]

Alrght. This gonna be for phils shooting range? Highscore on that would be nice.

[myschoo]

yeh im working on it now :)

[TacticalPenguin]

Cool!

[myschoo]

hmm... when u get high score it should print New high score... worked ok about 10 mins ago but now i cant get it to work wtf :/

[GuitarGod1134]

I keep getting an error in this code its expecting a = next to a then or something like that. can anyone find it?

Spoiler for Code:

-- Im Changing up Maze of Doom and I've been coming up with more ideas weekly so Im starting on this

-- time to declare some variables
--colors
green = Color.new(0, 255, 0)
red = Color.new(255, 0, 0)
black = Color.new(0, 0, 0)

--sprites
demon = Image.load("demon.png")
creature = Image.load("creature.png" )

-- the player looks in different directions right?
splayer = {}
--now hes looking straight
splayer[1] = Image.load("lL.png")
--now hes looking left
splayer[2] = Image.load("lR.png")
--now hes looking right
splayer[3] = Image.load("lU.png")
--now hes looking back
splayer[4] = Image.load("lD.png")

--now for the variable that makes his head turn .. literally
direction = 1

--the creature's health
chp = 500

--more sprites
bullet = Image.createEmpty(1,1)
bullet:clear(black)

--and the level we are on
background = Image.load("background.pn g")


-- player's health and armor and the aliens'
health = 100
armor = 50
demonhp = 10

--how long it takes to reload
reload = Timer.new()

--the player's bullets
ammo = 1

-- some tables
Player = {}
Player[1] = {x=0, y=0}

-- your ammo
Bullet = {}
Bullet[1] = {Player[1].x, Player[1].y}

--the creatures table
creature = {}
creature[1] = { x = 10, y = 10 }

--whether the demon is alive or not
demonal = {}
demonal[1] = "true"
demonal[2] = "true"
demonal[3] = "true"
demonal[4] = "true"
demonal[5] = "true"
demonal[6] = "true"

-- the demon tables
demon = {}
demon[1] = {x = 400, y = 110}
demon[2] = {x = 390, y = 80}
demon[3] = {x = 410, y = 30}
demon[4] = {x = 420, y = 20}
demon[5] = {x = 400, y = 200}
demon[6] = {x = 270, y = 260}

--this is for our creature movement
--prevents the same random numbers on each program run
math.randomseed(os.time() )

--x=width y=height
-- REMINDER ^^^^

-- the main loop
while true do
pad = Controls.read()
screen:blit (0, 0, background)

--lets print some things to the screen shall we
screenrint(0, 0, "Alanan",red)
screenrint(0, 5, health, red)
screenrint(0, 10, armor, green)
screenrint(0, 15, ammo, green)

--lets make him move around
screen:blit(Player[1].x,Player[1].y,splayer[direction])
if pad:left() and Player[1].x > 0 then
Player[1].x = Player[1].x - 3
direction = 1
end

if pad:right() and Player[1].x < screenwidth then
Player[1].x = Player[1].x + 3
direction = 2
end

if pad:up() and Player[1].y > 0 then
Player[1].y = Player[1].y - 3
direction = 3
end

if pad:down() and Player[1].y < screenheight then
Player[1].y = Player[1].y + 3
direction = 4
end

--we need our creature to move too
screen:blit(creature[1].x,creature[1].y,creature)
creaturemove = math.random(0,50)

--now we make him move side note// i set creature move to math.random because i dont want him
-- moving all the time or else he would reach the end of the screen way to fast.
if creaturemove == 5 then
creature[1].x = creature[1].x + 1
end

-- we have to blit are demons to the screen also

if demonal[1] == "true" then
screen:blit(demon[1].x,demon[1].y,demon)
end

if demonal[1] == "true" then
screen:blit(demon[2].x,demon[2].y,demon)
end

if demonal[1] == "true" then
screen:blit(demon[3].x,demon[3].y,demon)
end

if demonal[1] == "true" then
screen:blit(demon[4].x,demon[4].y,demon)
end

if demonal[1] == "true" then
screen:blit(demon[5].x,demon[5].y,demon)
end

if demonal[1] == "true" then
screen:blit(demon[6].x,demon[6].y,demon)
end

-- now we make them chase the creature
--we are only gonna make two demons attack the creature
-- the other four will guard the exit

--heres demon 1
if demon[1].x > creature[1].x then
demon[1].x = demon[1].x - 1
end

if demon[1].x < creature[1].x then
demon[1].x = demon[1].x + 1
end

if demon[1].y > creature[1].y then
demon[1].y = demon[1].y - 1
end

if demon[1].y < creature[1].y then
demon[1].y = demon[1].y + 1
end

--now demon 2
if demon[2].x > creature[1].x then
demon[2].x = demon[2].x - 1
end

if demon[2].x < creature[1].x then
demon[2].x = demon[2].x + 1
end

if demon[2].y > creature[1].y then
demon[2].y = demon[2].y - 1
end

if demon[2].y < creature[1].y then
demon[2].y = demon[2].y + 1
end


--lets get his gun firing and ammo is there for reload
if pad:r() and ammo == 1 then
screen:blit(Bullet[1].x,Bullet[1].y,bullet)
fire = "true"
ammo = ammo - 1
reload:start()
--what if hes out of ammo?
elseif ammo == 0 then
fire = "false"
end

--this makes his bullet he shoots go different ways depending on which way he faces
if fire = "true" and direction == 1 then
Bullet[1].x = Bullet[1].x + 2
end

if fire = "true" and direction == 2 then
Bullet[1].x = Bullet[1].x - 2
end

if fire = "true" and direction == 3 then
Bullet[1].y = Bullet[1].y - 2
end

if fire = "true" and direction == 4 then
Bullet[1].y = Bullet[1].y + 2
end

-- now hes gotta reload
if ammo == 0 and reload:time() == 10 then
ammo = ammo + 1
end

--now lets make our bullet touch the demons
if Bullet[1].x == demon[1].x and Bullet[1].y == demon[1].y then
demonal[1] = "false"
end

if Bullet[1].x == demon[2].x and Bullet[1].y == demon[2].y then
demonal[2] = "false"
end

if Bullet[1].x == demon[3].x and Bullet[1].y == demon[3].y then
demonal[3] = "false"
end

if Bullet[1].x == demon[4].x and Bullet[1].y == demon[4].y then
demonal[4] = "false"
end

if Bullet[1].x == demon[5].x and Bullet[1].y == demon[5].y then
demonal[5] = "false"
end

if Bullet[1].x == demon[6].x and Bullet[1].y == demon[6].y then
demonal[6] = "false"
end

--what happens when the demons touch our creature???
if demon[1].x == creature[1].x

[myschoo]

hmm in LUA Player (for PC) it tells u exact line of ur code which is wrong...
so just look for that number and then look for the line ;)

[GuitarGod1134]

it flashes away too fast. it shows the command prompt or black screen for like a milisecond and all i can spot is "=" expected near then or something like that.

[myschoo]

ok
open your myscript.cmd and put there this:

luaplayer myscript.lua
pause

pause will stop it everytime after error so u can read it :)

[GuitarGod1134]

i already did that. and it works but it doesnt let me see the first command prompt that pops up that one has the errors on it.

[myschoo]

it must work...u did something wrong

[the undead]

hmm, whats the code to take a screenshot?...i forgot
-= Double Post =-
ok nvm, i figured it out. now i need to know how to save the screen shot in the psp's PHOTO folder

[Grimfate126]

yay! this thread is a sticky again!

[Access_Denied]

yay! this thread is a sticky again!

A mod didn't do it though. TacticalPaper did. I PM'ed Hardrive to see if he'll sticky the other one and get rid of that thread by Serideth. I hope he does.

[the undead]

hmm, whats the code to take a screenshot?...i forgot
-= Double Post =-
ok nvm, i figured it out. now i need to know how to save the screen shot in the psp's PHOTO folder

any one?

[TacticalPenguin]

blah = screen:save("ms0:/psp/photo/")

[the undead]

blah = screen:save("ms0:/psp/photo/")

ok thanks

[emericaska8r]

i already did that. and it works but it doesnt let me see the first command prompt that pops up that one has the errors on it.

i don't know why it doesn't work for you, but you could always press ctrl+alt+printscreen on your keyboard to try and take a screenshot of the command prompt before it disappears.
you'd have to get good timing, and then just paste it into word.

[myschoo]

very good now its sticky!! :)