Lua Programming Help Thread

[michaelp]

do you mean:
"How can I run my LUA program without using LUAPlayer?"
or literally, how do you run an eboot with a LUA script?
if it's the second one, i'm not sure if you can

[luizlizard]

do you mean:
"How can I run my LUA program without using LUAPlayer?"
or literally, how do you run an eboot with a LUA script?
if it's the second one, i'm not sure if you can

The second one, well ok, but i assume i can add a function to do it in the LUA Player source?

If yes, how? I know C++ but don't know how LUA Player works, also i'm not experienced in coding with C in the psp.

[michaelp]

but i assume i can add a function to do it in the LUA Player source?

i don't know, i never actually looked at the luaplayer source

[Anti-QuickJay]

You cant.

[luizlizard]

You cant.

Humm, why? I already looked at the source code and it actually seems easy

[PSPJunkie_]

Of course you can add functions to luaplayer. You just need an SDK setup, the right libs, and a non-lua mindset as LuaPlayer is in C++.

[luizlizard]

Ok, i added the function to the source, but i only have the precompiled toolchain (pspdev) so i can't compile it, can someone compile it for me?

Here it is: http://luizlizard.pspsc.com/downloads/luasystem.cpp

And just add it to the regular Lua Player .20 source.

Thanks in Advance!!!

[SG57]

you don't need to know how Lua Player is designed to add functions to it. look at my mods (flashing capabilities, IR keyboard (didn't release as pi key released soon after and havent had a time to implement it into it) and some directory functions (dump umd, etc.)). It just takes some observational skills ;)

[FaT3oYCG]

hey luizlizard when i compile lua player with the luasystem.cpp you made it just makes a black screen appear when i load it from my psp and i put the system and apps folder in and added lowser and all the oter stuff in the apps folder. but it compiles without errors do u know why coz i was trying to make one with all of the functions you included also can you add the nickName function the code is

-------------------------------
static int lua_nickName(lua_State *L)
{
if (lua_gettop(L) != 0) return luaL_error(L, "no arguments expected.");
char *namebuffer = "";
sceUtilityGetSystemParamS tring(1, namebuffer, 25);
lua_pushstring(L, namebuffer);
return 1;
}
-------------------------------

and the line is

-------------------------------
{"nickName", lua_nickName},
-------------------------------

[wendell]

sorry im new to this but can lua work on psp version 2.81?

[xpack]

You got to have a homebrew capable PSP firmware

[emericaska8r]

xpack was trying to say no
-= Double Post =-
but i'm pretty sure with all these updates at qj you can downgrade your firmware now

[-TheSilenceOfNoOne-]

Simple, how do I make an image display for a period of time, then go away when the player presses... say... X?

I already have the image loaded. :)

[Xx_FightStar_xX]

@ TheSilenceOfNoOne :

Here is a example for you if you want to only remove the image from the screen:

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

while true do

pad = Controls.read()

if pad:cross() then
My_Image:clear()
end

screen:blit(0, 0, My_Image)
screen.waitVblankStart()
screen.flip()
end

----------

Or like this if you want to completely remove the image from memory and not just the screen


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

Display_Image = true

while true do

pad = Controls.read()

if pad:cross() then
Display_Image = false
My_Image = nil
collectgarbage()
end

if Display_Image == true then
screen:blit(0, 0, My_Image)
end
screen.waitVblankStart()
screen.flip()
end

[MiG]

@ TheSilenceOfNoOne :

Here is a example for you :

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

while true do

pad = Controls.read()

if pad:cross() then
My_Image:clear()
end

screen:blit(0, 0, My_Image)
screen.waitVblankStart()
screen.flip()
end

----------

Or like this if you want to completely remove the image from memory and not just the screen


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

Display_Image = true

while true do

pad = Controls.read()

if pad:cross() then
Display_Image = false
end

if Display_Image == true then
screen:blit(0, 0, My_Image)
end
screen.waitVblankStart()
screen.flip()
end

both of those are flawed...

you want a bool for when X is pressed, set to T/F depending on what its already at.

Then the image blitted based on that.

[-TheSilenceOfNoOne-]

OK, so I am trying to do that with 3 images in a row.

Like this:?

gbaxlogo = Image.load(other/slogo.png)
gamelogo = Image.load(other/loading.png)
teamlogo = other/Team.PNG)

screen:blit(480, 272, gbaxlogo)
while true do
pad = Controls.read()

if pad:cross() then
screen:clear()
while true do
screen:blit(480, 272, teamlogo)
if pad:cross() then
screen:clear()
while true do
screen:blit(480, 272, gamelogo)
if pad:cross() then
screen:clear()
end

[myschoo]

or

while not Constrols.read():cross() do
screen:blit(x,y,image)
end

[FaT3oYCG]

what you are trying to do is a bit complicated give me about 10 mins


8 mins later lol

heres what i suggest

CODE:

-----------------------------------------------------------------------

gbaxlogo = Image.load(other/slogo.png)
gamelogo = Image.load(other/loading.png)
teamlogo = other/Team.PNG)

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

while true do

pad = Controls.read()

CI = 0

if
pad:cross() and CI == 0
then
screen:blit(0, 0, gbaxlogo)
CI = 1
end

if
pad:cross() and CI == 1
then
screen:blit(0, 0, teamlogo)
CI = 2
end

if
pad:cross() and CI == 2
then
screen:blit(0, 0, gamelogo)
CI = 3
end

if
CI == 3
then
screenrint(10, 10, now wasnt that cool, white)
CI = 0
end

screen.flip()
screen.waitVblankStart()

end
--------------------------------------------------

[emericaska8r]

what you are trying to do is a bit complicated give me about 10 mins


8 mins later lol

heres what i suggest

CODE:

-----------------------------------------------------------------------

gbaxlogo = Image.load(other/slogo.png)
gamelogo = Image.load(other/loading.png)
teamlogo = other/Team.PNG)

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

while true do

pad = Controls.read()

CI = 0

if
pad:cross() and CI == 0
then
screen:blit(0, 0, gbaxlogo)
CI = 1
end

if
pad:cross() and CI == 1
then
screen:blit(0, 0, teamlogo)
CI = 2
end

if
pad:cross() and CI == 2
then
screen:blit(0, 0, gamelogo)
CI = 3
end

if
CI == 3
then
screenrint(10, 10, now wasnt that cool, white)
CI = 0
end

screen.flip()
screen.waitVblankStart()

end
--------------------------------------------------

... no

what you have there will only blit the image the second 'x' is pressed. So you will basically never see it.

i'd just do:

img1 = Image.load("1.png")
img2 = Image.load("2.png")
img3 = Image.load("3.png")
variable = 0

while true do

   screen:clear()

   if variable == 0 then
      screen:blit(0,0,img1)
   elseif variable == 1 then
      screen:blit(0,0,img2)
   elseif variable == 2 then
      screen:blit(0,0,img3)
   end

   pad = Controls.read()
   if pad:cross() then
      variable = variable + 1
   end

   screen.flip()
   screen.waitVblankStart()
end

it will cycle images everytime 'x' is pressed, and show nothing pst the third image ;)

[SG57]

I would do something similar, except make it faster, more understandable and have it recyclable.

image = { Image.load("1.png"), Image.load("2.png"), Image.load("3.png") }
image_num = 1
exit = false

while ~exit do
    if Controls.read():cross() then
      image_num = image_num + 1
      
      if image_num > table.getn(image) then
          image_num = 0
      end

      screen:clear()
      screen:blit(0,0,image[image_num])
      screen.waitVblankStart()
      screen.flip()
    elseif Controls.read():start() then
      exit = true
    end
end

I believe you can do that in Lua.

[myschoo]

... no

what you have there will only blit the image the second 'x' is pressed. So you will basically never see it.

i'd just do:

img1 = Image.load("1.png")
img2 = Image.load("2.png")
img3 = Image.load("3.png")
variable = 0

oldpad = Controls.read()

while true do

   screen:clear()

   if variable == 0 then
      screen:blit(0,0,img1)
   elseif variable == 1 then
      screen:blit(0,0,img2)
   elseif variable == 2 then
      screen:blit(0,0,img3)
   end

   pad = Controls.read()
   if pad:cross() and oldpad:cross() ~= pad:cross then
      variable = variable + 1
   end

   if variable == 4 then variable = 1 end

   screen.waitVblankStart()
   screen.flip()
   oldpad = pad
end

it will cycle images everytime 'x' is pressed, and show nothing pst the third image ;)

fixed.

[FaT3oYCG]

heres what i suggest

CODE:

sorry about that heres my revised code

-----------------------------------------------------------------------

gbaxlogo = Image.load(other/slogo.png)
gamelogo = Image.load(other/loading.png)
teamlogo = other/Team.PNG)

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

oldpad = pad

while true do

pad = Controls.read()

CI = 0

if
pad:cross() and oldpad:cross() ~= pad:cross and CI == 0
then
screen:blit(0, 0, gbaxlogo)
CI = 1
end

if
pad:cross() and oldpad:cross() ~= pad:cross and CI == 1
then
screen:blit(0, 0, teamlogo)
CI = 2
end

if
pad:cross() and oldpad:cross() ~= pad:cross and CI == 2
then
screen:blit(0, 0, gamelogo)
CI = 3
end

if
CI == 3
then
screenrint(10, 10, now wasnt that cool, white)
screen.waitVblankStart()
CI = 0
end

screen.flip()
screen.waitVblankStart()

oldpad = Controls.read()

end
--------------------------------------------------

[michaelp]

you've screwed up some of your code:

gbaxlogo = Image.load(other/slogo.png)
gamelogo = Image.load(other/loading.png)
teamlogo = other/Team.PNG)

where's Image.load() ?

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

lua doesn't use the "u" in colour, it's "Color.new"

[code]screenrint(10, 10, now wasnt that cool, white)
screen : print, not screenrint and you need quotes around the words

if
CI == 3
then
screenrint(10, 10, now wasnt that cool, white)
screen.waitVblankStart()
CI = 0
end

what happened to "if pad:cross() and oldpad:cross() ~= pad:cross then"

while true do

pad = Controls.read()

CI = 0

i think "CI = 0" should be declared before the main loop


also, put your whole code in [code] tags

[FaT3oYCG]

sorry some of the things you sed were right but it was late at night and the screenrint bit is because on my first code post it makes : and P =

i origionally coppied the image load stuff from another post as this was meant to help someone.

and the pad cross stuff i dont want on the last one so it makes it automatically loop to start but i did forget the time in screenwaitvblankstart

gbaxlogo = Image.load(other/slogo.png)
gamelogo = Image.load(other/loading.png)
teamlogo = Image.load(other/Team.PNG)

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

oldpad = pad

while true do

pad = Controls.read()

CI = 0

if
pad:cross() and oldpad:cross() ~= pad:cross and CI == 0
then
screen:blit(0, 0, gbaxlogo)
CI = 1
end

if
pad:cross() and oldpad:cross() ~= pad:cross and CI == 1
then
screen:blit(0, 0, teamlogo)
CI = 2
end

if
pad:cross() and oldpad:cross() ~= pad:cross and CI == 2
then
screen:blit(0, 0, gamelogo)
CI = 3
end

if
CI == 3
then
screen:print(10, 10, "now wasnt that cool", white)
screen.waitVblankStart(150)
CI = 0
end

screen.flip()
screen.waitVblankStart()

oldpad = Controls.read()

end
--------------------------------------------------

make some images and test it it works like i meant it to

[-TheSilenceOfNoOne-]

Error arguments expected near "and" on line 30.

[michaelp]

if
pad:cross() and oldpad:cross() ~= pad:cross and CI == 0
then
screen:blit(0, 0, gbaxlogo)
CI = 1
end

if
pad:cross() and oldpad:cross() ~= pad:cross and CI == 1
then
screen:blit(0, 0, teamlogo)
CI = 2
end

if
pad:cross() and oldpad:cross() ~= pad:cross and CI == 2
then
screen:blit(0, 0, gamelogo)
CI = 3
end

your forgot the "()" at the end of pad:cross()

[emericaska8r]

oh yea i wasn't even thinking about putting in oldpad. thats a good idea so it won't cycle through them real fast with just pressing once

[FaT3oYCG]

youre welcome and what were u useing this code for by the way???

my code was the best reference???
u think

thanks

[myschoo]

ur coded doesnt work.

[FaT3oYCG]

ill work on it itll be finished complete and working by the end of the week i have other things to do and its the least of my worries at the monent

family issues
time issues
prodject issues
work issues
and
DarK~AleX has left

could it get much worse for me