Lua Programming Help Thread

[KleptoOne]

yeah, I stuck at typing:Argh:

[ClearTranquil]

Ohhh makes sense. Thanks.

That method isn't exactly what I was looking to do...I want it to run independant to the other events that are still moving/displaying things.

[Merick]

create a state - player_hit, and a counter. When the player gets hit, set the state to true. Then set all your player actions inside an if statement. If player_hit == false then you run the normal player controls and stuff. If player hit == true then you block the normal player stuff, and add 1 to the counter variable. when the counter reaches a certain number, you do the + 25 to the position and set the counter to 0, when you've done the + 25 3 times, you set player_hit to false in addition to reseting the counter

[ClearTranquil]

It seems everytime I try and create a "count = count +1" it does it infinately high right from the start. As if "count = count + 1000000000" wouldn't make it any different.

[Merick]

how are you doing it?

here's a simple counter, it adds 1 the the count each program cycle then displays the count:

white = Color.new(255,255,255)
count = 0

while true do
	count = count +1
	screen:clear()
	screen:print(10,10,count, white)
	screen:flip()
	pad = Controls.read()
	if pad:cross() then break end
	if pad:square() then count =0 end
end

[ClearTranquil]

That explains alot for me. I was putting count within an if statement. (noob)

[Merick]

well actually, you do want the count inside an if statement, I.E. if player hit == true then count = count + 1, and then inside that same if statement do if count = (60/3) then +25 to player pos and have another statement - if count >= 60 then count = 0 , player_hit = false

[Joel Van]

haha, well, this is the lua help thread, and i need lua help.

I want to use a "player" move kind've script but implement it into an image that kind've slides up and down when i press pad up and pad down, i've been going through some ideas and i've had some luck. However, i cannot seem to stop the image at pixels 0 and 512 (in other words, stop the picture from rolling off screen whilst holding up or down. I've had some some luck, but whenever it seems to work i get errors like "loop ungettable".

Any help would be appreciated.

[SG57]

if pad:up() and player.y > 0 then player.y = player.y - someSpeed end
if pad:down() and player.y+player.height < 512 then player.y = player.y + someSpeed end

[ClearTranquil]

I'm sure this my codes aren't efficient at all but I'm having some problems with collision. I'm thinking of just redoing it and making each map a separate file because this is just starting to get long and ridiculous.

Basically my problems are:
-When multiple buttons are pressed against a wall it gets REALLY screwed and the character flies in diagonal directions
-When the monster pushes the character against the wall she still goes right through it.
-When you push the monster back into some walls it applies both the X and Y displacement for some reason.

It's really frustrating...I can understand how to do collision based on objects but what I need is outer walls. The code I posted is for this map:



What I wish I could do is make an image the goes over top of the background and make it the only walkable/unwalkable area...

--MAP 1----------------------------------------------------------------------------

if map == 0 then
if CleoY >= 216 then 
	map = 1
	CleoY = 0
	MobX = 350
	MobY = 70
end
if CleoY <= 12 then
	dontmoveoff = false
	CleoY = 12
end
if CleoX <= -18 then
	map = 3
	CleoX = 440
	MobX = 200
	MobY = 150
end
if CleoX >= 441 then
	map = 5
	CleoX = 0
	MobX = 150
	MobY = 70
end
if CleoX <= 49 and CleoY <=133 then
	dontmoveoff = false
	if pad:left() then
	CleoX = 49
	elseif pad:left() and pad:up() then
	CleoX = CleoX + 3
	CleoY = CleoY + 3
	else
	CleoY = 133
	end
end
if CleoX >= 219 and CleoY <=48 then
	dontmoveoff = false
	if pad:right() and cleoright then
	CleoX = 219
	elseif pad:up() and pad:right() then
	CleoY = CleoY + 3
	CleoX = CleoX + 3
	elseif pad:up() and pad:left() then
	CleoY = CleoY + 3
	CleoX = CleoX - 3
	else
	CleoY = 48
	end
end
if CleoX >= 414 and CleoY <=180 then
	dontmoveoff = false
	if pad:right( ) then
	CleoX = CleoX - 3
	else
	CleoY = CleoY - 3
	end
end
-------------------------------------------------------------
if MobY >= 216 then 
	MobY = 216
end
if MobY <= 12 then
	dontmoveoff = false
	MobY = 12
end
if MobX <= -18 then
	MobX = -18
end
if MobX >= 441 then
	MobX = 441
end
if MobX <= 49 and MobY <=133 then
	dontmoveoff = false
	if mobwalkleft then
	MobX = 49
	else
	MobY = 133
	end
end
if MobX >= 219 and MobY <=48 then
	dontmoveoff = false
	if mobwalkright then	
	MobX = 219
	elseif mobwalkup then
	MobY = 48
	end
end
if MobX >= 414 and MobY <=180 then
	dontmoveoff = false
	if mobwalkright then
	MobX = 414
	else
	MobY = 180
	end
end
end --MAP 1 END

ALSO!!!

When I pin a monster against the wall if I hold down X (attack) it keeps doing it....

--ATTACKING---------------------------------------------------------------------------
if not quitting then
if not pad:cross() then
	Voicefx.Voicesound = false
end
if pad:cross() and not pad:triangle() and not pad:square() and not pad:circle() then
	if pad:cross( ) then
		if not Voicefx.Voicesound then
			Voice:play( )
           		Voicefx.Voicesound = true
       		end
    	else Voicefx.Voicesound = false
	end
	buttonpress = 1
	screen:blit(340,0,menu[buttonpress])
          	if cleodown then direction = 5 end
	if cleoleft then direction = 6 end
	if cleoright then direction = 7 end
	if cleoup then direction = 8 end
	screen:blit(CleoX,CleoY,cleo[direction])

--ATTACKDAMAGE-----------------------------------------------------------------

if MobX - 40 <= CleoX and CleoX <= MobX + 40 and MobY - 50 <= CleoY and CleoY <= MobY + 40 then
	Stab:play( )
	if cleoup then	
		MobY = MobY - 20
	elseif cleoleft then
		MobX = MobX - 20
	elseif cleoright then
		MobX = MobX + 20
	elseif cleodown then
		MobY = MobY + 20
	end
end
end
end

[k0ud]

thats a cool game..
but i dont know collision sryy...

[Yongobongo]

Does anyone know how i can return a table of the RGBA values of a color?

[youresam]

a = color:colors()
then you have a.r a.g a.b and a.a (red, greeb, blue, alpha)

[Grimfate126]

Does anyone know how i can return a table of the RGBA values of a color?

i dont know if there are bit operations in lua. if there are, then icould write a function for you. its not hard with bits shifting.
-= Double Post =-

a = color:colors()
then you have a.r a.g a.b and a.a (red, greeb, blue, alpha)

heh, that was easier ;)

[TacticalPenguin]

for instance:

blah = Color.new(37,198,255,100)
blahcolors = blah:colors()
blahcolors.r returns 198
blahcolors.a returns 100
etc

[Yongobongo]

Thanks, can i use these values to tell one of the values?
Say

 fff = Color.new(111,234,983,255)
colorz = fff:colors()
colorz.a = alphavalue

[TacticalPenguin]

Yep, colorz.a right there would be the alpha value, 255.

[Yongobongo]

Alright thanks now to go try it out

[Xylem]

Sorry for asking this, but how do you display an image for only a few seconds in C (not in lua)? None of the C developers were online, so i thought maybe both in lua and C, the function was the same.

[Yongobongo]

Make a timer and blit it while the timer is under 3000 or however long you want it there
-= Double Post =-
Why isn't this working??

color2= Color.new(110,132,255,100);

if menuOnFocus == 3 then
if pad:left() then
if sliderLocation2 > 1 then
sliderLocation2 = sliderLocation2 - 1
end
end

if pad:right() then
if sliderLocation2 < 99 then
sliderLocation2 = sliderLocation2 + 1
end

colorz = color2:colors()
color2 = Color.new(colorz.r, colorz.g, colorz.b, sliderLocation2*2.55

[TacticalPenguin]

You didn't close the parenthesis on the last color.new and you didnt close all your ifthens.

[Grimfate126]

Make a timer and blit it while the timer is under 3000 or however long you want it there
-= Double Post =-
Why isn't this working??

color2= Color.new(110,132,255,100);

if menuOnFocus == 3 then
if pad:left() then
if sliderLocation2 > 1 then
sliderLocation2 = sliderLocation2 - 1
end
end

if pad:right() then
if sliderLocation2 < 99 then
sliderLocation2 = sliderLocation2 + 1
end

colorz = color2:colors()
color2 = Color.new(colorz.r, colorz.g, colorz.b, sliderLocation2*2.55

you have a semicolon beside your first color.

wow, come on. those are the easiest things to spot. cant miss stuff like that. and also, you need to start indenting. a somple tab is all it takes, and it makes the code SO much easier to read. for example, ill indent your code:

color2= Color.new(110,132,255,100)

if menuOnFocus == 3 then
	if pad:left() then
		if sliderLocation2 > 1 then
			sliderLocation2 = sliderLocation2 - 1
		end
	end
end

if pad:right() then
	if sliderLocation2 < 99 then
		sliderLocation2 = sliderLocation2 + 1
	end
end

colorz = color2:colors()
color2 = Color.new(colorz.r, colorz.g, colorz.b, sliderLocation2*2.55)

[xpack]

Yeah you really shouldn't post especially even after luaplayer tells you what and where the error is...

[Yongobongo]

Luaplayer didn't give an error :|
It just doesnt seem to change the Alpha Value

[xpack]

Yeah but someone with your history of releases I'd of thought things like this would come easy to you.

[Yongobongo]

I've just posted the snippet, the actual script runs fine and i've checked over it numerous times and there doesn't seem to be an error oh well forget alpha

[youresam]

you have a semicolon beside your first color.

Lua supports semicolons.

a = 5
b = 6

is the same as

a = 5;
b = 6;

[Bob Hoil]

I have a question. For shooting i tryed using the example at Evilmana( i changed some things but still didn't like it i am still learnig lua jsut started up again) But when you shoot you can only shoot five on the screen at a time. I was wondereing how you do shooting bullets like in ATOM. My game is kind of like it but it will end up being a lot different.

Thanks Bob Hoil:)

[youresam]

Use a table.

[TacticalPenguin]

And table.getn. And table.insert. And that's all anybody will probably tell you because they want you to figure it out.