Lua Programming Help Thread

[PSPHax0r9]

What if your not loading it in Lowser? What if its with an eboot?

And also i tried that, but it doesnt seem to work in a function.

I will checkup on that...I think I saw some code somehwere for that involving 'break".

[Gutya]

Ok cheers.

[DiabloTerrorGF]

break just quits a loop. The way to exit a file is to have all the code ran as far as I know.

[Gutya]

It works if i put it in the main loop, but it won't allow me to put it in a function.

[Mast3r_Shak3]

screen:blit(stick.x, stick.y, stick)

--Loop in gettable. Help?

[Greenskull]

ok what is wrong with this? everything flickers....

if pad:cross()and status == 0 then

x = math.sin(pi * 2 / 360 * time) * 150 + 192.5
	screen:blit(0, 0, s11)
	time = time + 1

	if time >= 180 then
	screen:blit(0, 0, s12)
	end

	if time >= 360 then
		time = 0
	end
 
	screen.waitVblankStart()
	screen.flip()

end

and two, how do I make it so you only have to press X once for the animation to keep going, not hold it down?


EDIT: I just realized that this is not the kind of code that I want. I want the animation to stay stationary. I am very confused.....

[Spirit]

So.. where can I learn about simple collision? In my game I'm not going to have any action or shooting or such, just need it to do something when I walk up to someone and press X.

[Greenskull]

ok i have a stationary animation code but it is not workign the way i want it to. I want it to last longer and it also, when it switches, doesnt go as far over as i want it. how do i do that?

if pad:cross()and status == 0 then

-- current player position
playerX = 10
playerY = 10

-- blit current player animation image
	screen:blit((playerX - 1) * 16 - 4, (playerY - 1) * 16 - 4, s1pic, 1 + 25 * 

animation, 1, 156, 80)

-- calculate next animation image
	animationSlowDown = animationSlowDown + 1
	if animationSlowDown == 2 then
		animationSlowDown = 0
		animation = animation + animationDirection
		if animation == 2 then
			animationDirection = -1
		elseif animation == 0 then
			animationDirection = 1
		end
end

[TheMarioKarters]

Im having some trouble with my game...it's not displaying the right sprite. Please PM me if you can help.

[PSPHax0r9]

Im having some trouble with my game...it's not displaying the right sprite. Please PM me if you can help.

Check AIM man, I fixed it already!

[Gutya]

So.. where can I learn about simple collision? In my game I'm not going to have any action or shooting or such, just need it to do something when I walk up to someone and press X.

I have not seen a tutorial about simple collision yet...

I might make one...

[kozine]

Yea please do. I need to learn collision.

[Electro]

i would appreciate a collision guide too,,
i think i have some idea how its done, but theres probably an easier way then what im thinking,,
so it would help out

[Gutya]

If i get a bit of time tommorow ill look into it.

[Mast3r_Shak3]

i was thinking it might work like (well for my game)

if stick.x == spike.x then
screen:clear()
screen:blit(0,0,death,false)

[Electro]

when ever i try to put a timer function i ALWAYS get this error
attempt to index global 'Timer' (a nil value)

on that line i have this
timer = Timer.new()

what am i missing?

EDIT nvm,, it seems the eboot i was using didnt allow that function

[Greenskull]

i would appreciate a collision guide too,,
i think i have some idea how its done, but theres probably an easier way then what im thinking,,
so it would help out

that would be nice

[TPTaylor]

For collision, as long as you specify the part of the thing which is colliding, and with what other object, it should be ok.
So if you specify an area of a character, then tell it if something lands in the same place, make it do the thing you want.
Don't know if it helps, it probably doesn't...

[Gutya]

I added a screenrint with a font and now i get no script file found...

[PSPHax0r9]

I added a screenrint with a font and now i get no script file found...

Sned me a PM to remind me (I often forget) and I will sned you an example of how to print fonts and load them correctly with mono spacing and everyhting. I have a good one.

[Gutya]

Ok. Done.

[shadow-evillink]

I need a code:

pic A, pic B

pic A is loaded on the screen, when I press X pic A disappears and pic B appears. As long as I have the x button pressed pic B shows not pic A. When I let go of X pic B disappears and pic A appears again.

It sounds easy but I cant get it working.Thanks in advance and sorry for a stupid request.

[kozine]

Ok try this:

--Load images
pica = Image.load("Path to image")
picb = Image.load("Path to image")

--Begin the main loop
while true do
pad = Controls.read()

screen:blit(0, 0, pica)

if pad:cross() then
screen:blit(0, 0, picb)
end

screen.flip()
end

That works for me!

[Greenskull]

ok, how do I make this animation go slower?

[stewie]

you can change the CPU speed and max frame skip

[Greenskull]

sorry i forgot to post it... here

if pad:cross()and status == 0 then

-- current player position
playerX = 10
playerY = 10

-- blit current player animation image
	screen:blit((playerX - 1) * 16 - 4, (playerY - 1) * 16 - 4, s1pic, 1 + 80 * 

animation, 1, 78, 80)

-- calculate next animation image
	animationSlowDown = animationSlowDown + 1
	if animationSlowDown == 2 then
		animationSlowDown = 0
		animation = animation + animationDirection
		if animation == 2 then
			animationDirection = -1
		elseif animation == 0 then
			animationDirection = 1
		end
end

[Greenskull]

how do i slow that down?

[shadow-evillink]

Ok try this:

--Load images
pica = Image.load("Path to image")
picb = Image.load("Path to image")

--Begin the main loop
while true do
pad = Controls.read()

screen:blit(0, 0, pica)

if pad:cross() then
screen:blit(0, 0, picb)
end

screen.flip()
end

That works for me!

Thanks I'll try it.

[Andrey]

Can someone help me? Im trying to have a character move when I press right, here is what I have so far. Note: The "loading finished" does not disappear after 4 seconds, the character image blinks (probably due to the fact the image is not transparent) and the character does nothing when I press right. Can someone tell me whats wrong? Thanks in advance.

white = Color.new(255, 255, 255)
char = Image.load("char.png")
y = 100

screenrint(100, 100, "loading finished", white)
screen.flip()
screen.waitVblankStart(24 0)
screen:clear()

screen:blit(150, y, char)
screen.flip()

pad = Controls.read()

if pad:right() then
y = y + 5
end

while true do
screen.waitVblankStart()
screen.flip()

end

[Kameku]

You need to have your pad stuff inside your while loop. Like this:

white = Color.new(255, 255, 255)
char = Image.load("char.png")
y = 100

screenrint(100, 100, "loading finished", white)
screen.flip()
screen.waitVblankStart(24 0)
screen:clear()

while true do

pad = Controls.read()

if pad:right() then
y = y + 5
end

screen:blit(150, y, char)
screen.flip()

screen.waitVblankStart()
screen.flip()

end