Lua Programming Help Thread

[kozine]

IS it possible to convert a WAV file to a IT file? If so how? Thankyou.

[Electro]

*puzzled*, hmm, I might just wait for someone to release a loading type thing and I'll learn from that.

look at some prievous games that use the highscore save thing,,
like shines snake or other ones,,

Edit: on another note,, how do you say
if num1 == n1 or num1 == n2 or num1 == n3 or num1 == n4 or num1 == n5 or num1 == n6 then
<whatever>

easily???(less lines of code)

[TPTaylor]

IS it possible to convert a WAV file to a IT file? If so how? Thankyou.

You should have just asked on MSN, but yes it is possible.
Just use open mod plug.
Open up the wav, and just press save and it will be an IT, alternatively...just send it to me now...

[Grimfate126]

question: it is ok with pspmillionaire if i used his bullet firing snippet, but edited it a little??i cant think of any other way to fire bullets.

[Mast3r_Shak3]

Im sure it is. Everything lua is open source

[Mast3r_Shak3]

Does anyone know of a site where I can get sound effects in wav format?

[montrob]

What's wrong with this code? It wont work at all.




background = Image.load("background.pn g")
mouse1 = Image.load("mouse1.png")

mouse.x = 100
mouse.y = 272

while true do
screen:blit(0, 0, background, false)
end

pad = Controls.read

if pad:up() then
mouse.y = mouse.y + 1
screen:blit(mouse.x, mouse.y, mouse1)
end

if pad:down() then
mouse.y = mouse.y - 1
screen:blit(mouse.x, mouse.y, mouse1)
end

if pad:left() then
mouse.x = mouse.x - 1
screen:blit(mouse.x, mouse.y, mouse1)
end

if pad:right() then
mouse.x = mouse.x + 1
screen:blit(mouse.x, mouse.y, mouse1)
end

[c5cha7]

Does anyone know of a site where I can get sound effects in wav format?

I am looking for the same thing :icon_wink .
I found a site that has .mod sounds though >
http://www.modarchive.com/

[TheMarioKarters]

Im sure it is. Everything lua is open source

Unless you compile it.

[c5cha7]

What's wrong with this code? It wont work at all.




background = Image.load("background.pn g")
mouse1 = Image.load("mouse1.png")

mouse.x = 100
mouse.y = 272

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

pad = Controls.read

if pad:up() then
mouse.y = mouse.y + 1
screen:blit(mouse.x, mouse.y, mouse1)
end

if pad:down() then
mouse.y = mouse.y - 1
screen:blit(mouse.x, mouse.y, mouse1)
end

if pad:left() then
mouse.x = mouse.x - 1
screen:blit(mouse.x, mouse.y, mouse1)
end

if pad:right() then
mouse.x = mouse.x + 1
screen:blit(mouse.x, mouse.y, mouse1)
end
end

Fixed!
Your while true loop was wrong ;) .
Your suppost to include your pad functions
then put end at the end of your code.

[montrob]

I still get this error - "attempt to index global 'mouse' <a nil value>

[Grimfate126]

1 moe queston: how would i make collision for a stick figure?? would i have to do it in seperate parts? thx.

[Mast3r_Shak3]

I am looking for the same thing :icon_wink .
I found a site that has .mod sounds though >
http://www.modarchive.com/

I found a site http://simplythebest.net/sounds/WAV/WAV_sounds.html

[Mast3r_Shak3]

1 moe queston: how would i make collision for a stick figure?? would i have to do it in seperate parts? thx.

i have done if for my game. u just cant use the magic wand tool in photohop. it has to be rectangular. the collision still works fine tho

[Grimfate126]

i have done if for my game. u just cant use the magic wand tool in photohop. it has to be rectangular. the collision still works fine tho

??? huh? my stik figure has a round head. i want it so that when u shoot a bullet at a certain part, and it HITS the part,(thats where the collisions come in)then, it will do something. so how would u do that for a circle. sry, if i sound confusing. thx


P.S. to montrob, try this:

background = Image.load("background.png")
mouse1 = Image.load("mouse1.png")

mouse.x = 100
mouse.y = 272

while true do

screen:blit(0, 0, background, false)
screen:blit(mouse.x, mouse.y, mouse1)

pad = Controls.read

if pad:up() then
mouse.y = mouse.y + 1
end

if pad:down() then
mouse.y = mouse.y - 1
end

if pad:left() then
mouse.x = mouse.x - 1
end

if pad:right() then
mouse.x = mouse.x + 1
end

screen.waitVblankStart()
screen:flip()
end

[montrob]

??? huh? my stik figure has a round head. i want it so that when u shoot a bullet at a certain part, and it HITS the part,(thats where the collisions come in)then, it will do something. so how would u do that for a circle. sry, if i sound confusing. thx


P.S. to montrob, try this:

background = Image.load("background.png")
mouse1 = Image.load("mouse1.png")

mouse.x = 100
mouse.y = 272

while true do

screen:blit(0, 0, background, false)
screen:blit(mouse.x, mouse.y, mouse1)

pad = Controls.read

if pad:up() then
mouse.y = mouse.y + 1
end

if pad:down() then
mouse.y = mouse.y - 1
end

if pad:left() then
mouse.x = mouse.x - 1
end

if pad:right() then
mouse.x = mouse.x + 1
end

screen.waitVblankStart()
screen:flip()
end

Didn't work.. every time i try to do something i get this error

"attempt to index global 'mouse' <a nil value>"

What does that mean?

[Mast3r_Shak3]

Ok umm, i need help making sounds play when i die...

ballsound = Sound.load("blip.wav", false)
deathsound = Sound.load("magnum.wav", false)

deathsound = death
ballsound = ball
voice = sound:play()

i get "attempt to index global 'voice' (a nil value)"

[PSPMillionaire]

your sound variable isnt defined. nothing is assigned to it.
Also what are "death" and "ball"?
You already assigned ballsound and deathsound a value, so what are those that you are assigning directly after?
Try something like this...

ballsound = Sound.load("blip.wav", false)
deathsound = Sound.load("magnum.wav", false)

 local sound = deathsound
voice = sound:play()

[Grimfate126]

Didn't work.. every time i try to do something i get this error

"attempt to index global 'mouse' <a nil value>"

What does that mean?

oh, my bad. i figured it out.the correct code:

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

background = Image.load("background.png")
mouse = Image.load("mouse1.png")

mousex = 100
mousey = 172

while true do

screen:clear()

pad = Controls.read()

screen:blit(0, 0, background, false)
screen:blit(mousex, mousey, mouse)

if pad:up() then
mousey = mousey - 1
end

if pad:down() then
mousey = mousey + 1
end

if pad:left() then
mousex = mousex - 1
end

if pad:right() then
mousex = mousex + 1
end

screen.waitVblankStart()
screen.flip()
end

the problems:

1. the variable mouse.x and mouse.y both have periods in them. is LUA, that means that you are assigning those values to an array. EXAMPLE: if i had an array like this:

mouse = {}

and then i put mouse.x = 100 and mouse.y= 170 in my code, and started it, the array would now look like this:

mouse = { x = 100, y = 170}

BUT, you didnt have an array so it called it a "nil" value, and gave you an error. get what im saying??

2. u had the variables BEFORE the loading. this is'nt so much a problem, but it could interfere with the coding. so ALWYS load everything first, THEN have the variables, THEN your main code.

3. thisis just a tip: evertime you are blitting the same thing to the screen, NEVER put screen:flip() before each time you blit it. this will cause clipping problems. just put

screen.waitVblankStart()
screen.flip()
end

at the VERY END of your code, IN the main loop.


thats all i saw! hope u understood ur problems, and good luck with whatever ur doing!!

EDIT: PSPMILLIONAIRE, could u help me with my collisions? read my above posts to see the problem i have. thx!

[PSPMillionaire]

Grim you will have to use what is called "pixel perfect collision" .
There are solutions for doing this posted all over the internet. Find an example with a simple BASIC language. It will be very much like lua.

[Mast3r_Shak3]

your sound variable isnt defined. nothing is assigned to it.
Also what are "death" and "ball"?
You already assigned ballsound and deathsound a value, so what are those that you are assigning directly after?
Try something like this...

ballsound = Sound.load("blip.wav", false)
deathsound = Sound.load("magnum.wav", false)

 local sound = deathsound
voice = sound:play()

I tried it... it freezes after the loading screen

andi was a little confused by ur tuts on the ball and death thing

[montrob]

Ya i get what your sayin now.. But now it says

"attempt to index a global 'pad' <a function value>

[Grimfate126]

Ya i get what your sayin now.. But now it says

"attempt to index a global 'pad' <a function value>

oh whoops(again), here is the fixed code:

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

background = Image.load("background.png")
mouse = Image.load("mouse1.png")

mousex = 100
mousey = 172

while true do

screen:clear()

pad = Controls.read()

screen:blit(0, 0, background, false)
screen:blit(mousex, mousey, mouse)

if pad:up() then
mousey = mousey - 1
end

if pad:down() then
mousey = mousey + 1
end

if pad:left() then
mousex = mousex - 1
end

if pad:right() then
mousex = mousex + 1
end

screen.waitVblankStart()
screen.flip()
end

and if it gives u another error, tell me what line its on, but this exact code worked for me.

[montrob]

ok thx now i can move on

[Grimfate126]

ok thx now i can move on

what u working on?

[montrob]

what u working on?

I'll tell you once i get a little bit further..

As for now.. what do you put for the word "AND" like this:

if mousex == 135 "AND" -- what would you put there?
if mousey == 151

[PopcOrn DeVil]

What you mean like if pad:down() and pad:up() then?

if mousex == 135 and mousey == 151 then

[montrob]

oh.. thx lol

[PopcOrn DeVil]

I got this error:

'end' expected <to close 'while' at line 10> near '<eof>'

[montrob]

add an end at the end of your while statment