Lua Programming Help Thread

[k0ud]

help plz any i need to port the bible to LUA

[myschoo]

so... whats your problem... post code or something

[KleptoOne]

help plz any i need to port the bible to LUA

So what do you need help with? Lua's pretty easy to figure out.

[Yongobongo]

help plz any i need to port the bible to LUA

If you have it in .txt format, use this code


y = 10

file = io.open("bible.txt","r")

for line in file:lines() do
y = y + 10
screenrint(100,y,line,white)
end

file:close()
-= Double Post =-

I have a modified version of Lua that can write to the flash0. It's really easy to do. But if I released it, we would have hundreds of bricked PSPs. That's why it will probably never be implemented. I would learn C if you want to write to the flash0.

GIMME GIMME GIMME!!

[Anti-QuickJay]

He doesnt have it no more Yongobongo, i already asked :P
ai3gtmc- if you really want to port it, Learn LUA.

[Yongobongo]

Oh poo.

[lucifer_v]

is there than nobody dat has it? or can make it?

[Anti-QuickJay]

If you know C you can make it, Just edit LUA Player's source.

[Yongobongo]

Thats the problem - i have little knowledge of C And luaplayer is C++

[SG57]

Heh... Id bewilling to quickly implement flashing capabilities. If you use it the wrong way, your fault. Atleast it'd teach you not to go poking around where you dont belong.

[Yongobongo]

SG, check your pm plz ;)

[myschoo]

yeah do it :) thx! :)

[gameo]

If the end of my menu code looks like this:

if menustatus == 1 then
screen:clear()
screen:blit(0, 0, menu)
screen.flip()
if pad:cross() then
presslay()
screenrint(130,130, "The test worked!", white)
screen.flip()
end
end

if menustatus == 2 then
screen:clear()
screen:blit(0, 0, menu2)
screen.flip()
if pad:cross() then
presslay()
screen.waitVblankStart(60 )
dofile("credits.lua")
end
end

if menustatus == 3 then
screen:clear()
screen:blit(0, 0, menu3)
screen.flip()
if pad:cross() then
presslay()
screen.waitVblankStart(60 )
System.Quit()
end
end

if menustatus <= 0 then
menustatus = 3
end

if menustatus >= 4 then
menustatus = 1
end

... and im going to add another function, let's say USB Connect, would it look like this?

if menustatus == 1 then
screen:clear()
screen:blit(0, 0, menu)
screen.flip()
if pad:cross() then
presslay()
screenrint(130,130, "The test worked!", white)
screen.flip()
end
end

if menustatus == 2 then
screen:clear()
screen:blit(0, 0, menu2)
screen.flip()
if pad:cross() then
presslay()
screen.waitVblankStart(60 )
dofile("credits.lua")
end
end

if menustatus == 3 then
screen:clear()
screen:blit(0, 0, menu3)
screen.flip()
if pad:cross() then
presslay()
screen.waitVblankStart(60 )
System.Quit()
end
end

if menustatus == 4 then
screen:clear()
screen:blit(0, 0, menu4)
screen.flip()
if pad:cross() then
presslay()
screen.waitVblankStart(60 )
SystemUsbDiskModeActivate ()
end
end

if menustatus <= 0 then
menustatus = 4
end

if menustatus >= 5 then
menustatus = 1
end

[Anti-QuickJay]

Heh... Id bewilling to quickly implement flashing capabilities. If you use it the wrong way, your fault. Atleast it'd teach you not to go poking around where you dont belong.

Thanks!
That will be awesome!

[myschoo]

If the end of my menu code looks like this:



... and im going to add another function, let's say USB Connect, would it look like this?

its:

System.usbDiskModeActivate()

and use CODE not QUOTE, or atleast disable smilies

[the undead]

Heh... Id bewilling to quickly implement flashing capabilities. If you use it the wrong way, your fault. Atleast it'd teach you not to go poking around where you dont belong.

if you do it plz send me a copy, i was going to learn C to do this when i got the dreeded psptoolchain on my comp....but i hnever could get it installed right, even following the tuts....ill keep trying tho

[emericaska8r]

yea i could never get all the c stuff to work ever either
i thought i finally got it once but no

[andyauff]

Yeah it's really annoying..I haven't been successful yet.

[emericaska8r]

if i create a function in one script, can i use that the function already created in a different script?

[Urameshi]

i think so if you put=

dofile(yourscriptnamehere.lua)

in the new different scrpit that doesnt have the function that you made

[SG57]

Everyone wanting flashing capabilities in Lua, look at the thread i created that has a modded lua player for it.

[Yongobongo]

Thanks so much SG57!

[Merick]

anyone have a link to a good tutorial on using the 3d gu?

[emericaska8r]

thanks sg57!

and by the way, i have released my newest version the super mario bros. portable, so check the forum for that as many of you already have. thanks!

[Merick]

Searching through this thread, I found an old post by Yaustar with this bit of code:

RED_COLOUR = Color.new( 255, 0, 0 );

SQUARE_POLYGON = 
{
	{ RED_COLOUR, -0.5,  0.5, -1.0 },
	{ RED_COLOUR,  0.5,  0.5, -1.0 },
	{ RED_COLOUR,  0.5, -0.5, -1.0 },
	
	{ RED_COLOUR,  0.5, -0.5, -1.0 },
	{ RED_COLOUR, -0.5, -0.5, -1.0 },
	{ RED_COLOUR, -0.5,  0.5, -1.0 }
};

local gRotationAngle = 0;

while true do	
	Gu.start3d();
	Gu.clearDepth( 0 );
	Gu.clear( Gu.COLOR_BUFFER_BIT + Gu.DEPTH_BUFFER_BIT );
	Gum.matrixMode( Gu.PROJECTION );
	Gum.loadIdentity();
	
	Gum.perspective(75, 16/9, 0.5, 1000);

	Gum.matrixMode( Gu.VIEW );
	Gum.loadIdentity();

	Gum.matrixMode( Gu.MODEL );
	Gum.loadIdentity();

	Gu.disable( Gu.TEXTURE_2D );	
	Gum.translate(0, 0, -3.5);
	Gum.rotateXYZ( 0, 0, gRotationAngle * ( Gu.PI / 180.0 ) );	
	Gum.drawArray( Gu.TRIANGLES, Gu.COLOR_8888 + Gu.VERTEX_32BITF + Gu.TRANSFORM_3D, SQUARE_POLYGON );	
	Gu.end3d();

	screen.waitVblankStart();
	screen.flip();	
	
	gRotationAngle = gRotationAngle + 1;
	
	if Controls.read():start() then
		break;
	end
end

I've been looking all over, but all I've been able to find are lists of the gu functions, with no info on what each one does or how to use them.

Can someone explain how this works, and what I would need to do to make it display a tile image instead of a red square?

[HaxxBlaster]

What do you guys get from you FPS counter when your script is not doing much? What i get is 60 FPS, i just printed the FPS string, nothing more.

[yaustar]

60 fps is the maximum since that is the screens max refresh rate (60 hz). If you want to get 'more', then don't call waitForVSync but the display will look VERY weird.

[HaxxBlaster]

60 fps is the maximum since that is the screens max refresh rate (60 hz). If you want to get 'more', then don't call waitForVSync but the display will look VERY weird.

"waitForVSync"? I made my own FPS counter without looking at others code, this is what i came up with. You just need to call the function, no variables needed.

function FPS()
if fps==nil then
timer=Timer.new()
fps=0
lastfps=0
end
timer:start()
if timer:time() > 1000 then
timer:reset()
lastfps=fps
fps = 0
return lastfps
else
fps=fps+1
return lastfps
end
end

[yaustar]

"waitForVSync"? I made my own FPS counter without looking at others code, this is what i came up with. You just need to call the function, no variables needed.

Vblank/VSync whatever. The call that everyone uses to wait for the screen to finish drawing every frame limits the FPS to the screen's refresh rate of 60hz which is 60 fps. Removing this call will mean that the game will run as fast as it can but you will end up with a VERY flickerly display.

[HaxxBlaster]

Vblank/VSync whatever. The call that everyone uses to wait for the screen to finish drawing every frame limits the FPS to the screen's refresh rate of 60hz which is 60 fps. Removing this call will mean that the game will run as fast as it can but you will end up with a VERY flickerly display.

Well, i know. I've just never used "waitForVSync".