Lua Programming Help Thread

[Bob Hoil]

I meant i want to make one that looks like the one on the xmb. I want the battery shape. That is how i want to know how to make the battery appear. Thanks Bob Hoil

[yumCOOKIEZZ]

No.
Set the texture mode to Gu.TFX_MODULATE, it basically caps the colors at the defined RGBA color. (So for 100 transparency do Color.new(255,255,255,100 ))
-= Double Post =-

Yeah, thats probably it.

Lol. I fixed that.

New problem (jeez I'm an uber noob today).

When I have the screen display an image that takes up the whole screen it gets blocky.


Does it just hate vista again?
screen.waitVblankStart(60 )
screen:blit(0, 0, background, false)
screen.flip()

Theres the code for that...it doesn't seem to be wrong o.o

[youresam]

That image is corrupt..
-= Double Post =-

I meant i want to make one that looks like the one on the xmb. I want the battery shape. That is how i want to know how to make the battery appear. Thanks Bob Hoil

Make it
Thanks Sam

[yumCOOKIEZZ]

That was a direct screenshot of what my PSP was seeing xP

I fixed it. The image was too large. I forgot to resize.

[Urameshi]

good job

[Yongobongo]

Wow.

Anyways, Would you be able to edit lua player to allow a 1080x1080 picture to be loaded and blited to screen without taking all the memory? Or will memory be a issue?

512x512 is the limit

[Urameshi]

oh i thought 540x540 was the limit

[youresam]

oh i thought 540x540 was the limit

In my modified luaplayer, there is no limit

[Urameshi]

youresam, is there anything you cant do?

[dracule]

make beryl work on the psp, lol

[youresam]

youresam, is there anything you cant do?

make beryl work on the psp, lol

That

[TacticalPenguin]

But he could reprogram a majority of its features. Not that hes doing that with luaX/luaos2 or anything.

[xmex]

*knock-knock*

Hello!

Right, I asked my brother as to the 0 with a line through and learned of theta. is there a built in sin and cos function?

Help!

[Yongobongo]

In my modified luaplayer, there is no limit

z0mg you mean the iPodmock luaplayer?

[xmex]

Never mind, I HAVE GOT IT ^^.

This is the entire code:

player=Image.load("asteplayer.png")
x=0
y=0
direction=0
--loop
while true do
pad=Controls.read()
if pad:up() then
x=x+xmove
y=y+ymove
end
if pad:left() then
direction=direction-2
end
if pad:right() then
direction=direction+2
end
if direction>360 then
direction=0
end
if direction<0 then
direction=360
end
xmove=math.cos(math.rad(direction))
ymove=math.sin(math.rad(direction))
screen:clear()
screen:blit(x, y, player, false)
screen.flip()
screen.waitVblankStart()
end

Good old LuaEdit Lua 5.0 reference manual
-= Double Post =-
Oh no new problem!

in this code VV

for a=1, en_1 do
screen:blit(asteroid[a].x, asteroid[a].y, asteroid1, false)
screen:print(0, 0, asteroid[a].vspeed, red)
asteroid[a].y=asteroid[a].y+asteroid[a].vspeed
asteroid[a].x=asteroid[a].x+asteroid[a].hspeed
if asteroid[a].x>480 then
asteroid[a].x=0
end
if asteroid[a].y>272 then
asteroid[a].y=0
end
if asteroid[a].y<0 then
asteroid[a].y=272
end
if asteroid[a].x<0 then
asteroid[a].x=480
end
end

It seems to move the asteroid[a] miles across the screen each time (its in a while true do loop) I printed the value of vspeed it was 01 so why so fast! this is the code that set v/hspeed

asteroid[1]={x=math.random(440), y=0, width=32, height=32,vspeed=(math.random(1))-(math.random(2)), hspeed=(math.random(1))-(math.random(2))}

-= Double Post =-
My bad, I got that too. The screen was cleared too soon - so they werent drawn!
-= Double Post =-
Right new problem (lol getting a lot of these!)

function Collision()
for f=1,en_1 do
for g=1, no_bull do
if asteroid[f].x+32>bullet[g].x and asteroid[f].x<bullet[g].x+6 and asteroid[f].y+32>bullet[g].y and asteroid[f].y<bullet[g].y+6 then
score=score+20
asteroid[f].x=489346983
bullet[g].x=-99999999999
end
end
end
end--this is line 34
function PlrDeath()
for h=1,en_1 do
if player.x+16>asteroid[h] and player.x<asteroid[h]+32 and player.y+16>asteroid[h].y and player.y<asteroid[h]+32 then
break
end
end
end

I get an error in line 34 loop in gettable...but i dont see an infinite loop...the function doesnt call itself or anything! help :'(

EDIT

Nevermind, changed player to player1 and fixed other typos.

[yumCOOKIEZZ]

D= How do I get the Analog Nub thing to work.
I'm pretty sure I would have an image move if a direction was pressed but I don't know the codeness for analog ;O
-= Double Post =-
Is using the analog in LUA even possible?

[TacticalPenguin]

Yea. Controls.read():analogX() returns the analog x value between 128 and -128 and analogY returnas 128 to -128.

[yumCOOKIEZZ]

Thanks. I'll try and mess around with that until I can get it to work right.

(I'm Computer language retarded)

[TacticalPenguin]

Basically when analogX is -128, the analog is pressed all the way to the left. The rest should be easy to figure out.

[yumCOOKIEZZ]

ahh I get it now. Thanks =D
-= Double Post =-
Ugh (feels completely retarded)

How exactly would I put it so if Controls.read():analogx() is greater than 0 it would add an amount to X?
-= Double Post =-
Another question. How can I make an image semi-transparent. I want the picture to be see through so the background is visible through it.

[myschoo]

yes, this came up a while back:

function drawCirc(where, x, y, radius, color)

	theta = 0

	while theta<=360 do
		where:drawLine((math.sin(    theta)*radius)+x, (math.cos(theta)*radius)+    y, (math.sin(theta+1)*radius    )+x, (math.cos(theta+1)*radius    )+y, color)
		theta = theta+1
	end
end

but this will draw it with "animation" , wont it?
-= Double Post =-

ahh I get it now. Thanks =D
-= Double Post =-
Ugh (feels completely retarded)

How exactly would I put it so if Controls.read():analogx() is greater than 0 it would add an amount to X?
-= Double Post =-
Another question. How can I make an image semi-transparent. I want the picture to be see through so the background is visible through it.

here:

if Controls.read():analogX() > 20 then
Player.x = Player.x + Controls.read():analogX() / 20
end

1st underline: that analog deadzone... analog nub returns number even without doing anything (about 5-6)

2nd underline: it will move more dynamically

2nd question:

blah = Color.new(R,G,B,A)
semiRed = Color.new(255,0,0,127)

this doesnt work in PC lua player btw

[yumCOOKIEZZ]

but this will draw it with "animation" , wont it?
-= Double Post =-



here:

if Controls.read():analogX() > 20 then
Player.x = Player.x + Controls.read():analogX() / 20
end

1st underline: that analog deadzone... analog nub returns number even without doing anything (about 5-6)

2nd underline: it will move more dynamically

2nd question:

blah = Color.new(R,G,B,A)
semiRed = Color.new(255,0,0,127)

this doesnt work in PC lua player btw

Thanks =DDDD


I'll try not to ask too many more noobish questions.

[Urameshi]

how do you delete something in lua, so that it wont be used anymore in the game, like how would you kill something and make it inactive?

[eldiablov]

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

while true do

code

if logo dead = true (something like that)
logo = NULL

if that doesnt work try non caps aswell or NILL

[Urameshi]

ya that doesnt work

[myschoo]

try nill

and then collectgarbage()

[Urameshi]

what does collectgarbage() do?

[xmex]

hmmm how would I make all black pixels in an image transparent?

EDIT

and rotate an image by a variable called direction 0-360 (degrees, 0 is right 270 is down)

[Urameshi]

collectgarbage() doesnt work for me, and i still dont know what it does

[ahrimanes]

No.
Set the texture mode to Gu.TFX_MODULATE, it basically caps the colors at the defined RGBA color. (So for 100 transparency do Color.new(255,255,255,100 ))

ok tnks i will test at home.