Lua Programming Help Thread

[EminentJonFrost]

i meant all lua coders... :icon_razz

:icon_sad:
...aww man...(lol)
:icon_razz

[emericaska8r]

In my code, all the graphics keep blinking and they should just stay in the center if you move the player close enough to the wolf. Also, the wolfs health should erase so the new value will not write over the old one. Here is my code, any help would be great!

grass = Image.load("grass.png")
player = Image.load("player.png")
wolf = Image. load("wolf.png")
oldpad = Controls.read()
red = Color.new(255,0,0)
green = Color.new(0,255,0)

screenwidth = 480 - player:width()
screenheight = 272 - player:height()

Player = {}
Player[1] = { x = 100, y = 50 }
Player[2] = { Health = 100, Weapon = "Sword", Level = 1, Type = "Warrior"}
Player[3] = { Exp = 0 }
Wolf = {}
Wolf[1] = { x = 250, y = 150 }
Wolf[2] = { Health = 100, Weapon = "Claws", Type = "Wolf", Level = 1}


--Label the fighting sequence for the Function fight
function Fight()
--Paste in the grass
for a = 0, 14 do
for b = 0,8 do
screen:blit(32 * a, 32 * b, grass)
end
end
--Paste player and enemy in center
screen:blit(75,125, player)
screen:blit(200,125, wolf)

screenrint(1,1,"Fight!!!")
screenrint(50,50,"Weapon: " .. Player[2].Weapon, red)
screenrint(250,125,"Weapon: " .. Wolf[2].Weapon, red)
screenrint(250,150,"Type: " .. Wolf[2].Type, red)
screenrint(250,175,"Level: " .. Wolf[2].Level, red)
screenrint(50,75,"Type: " .. Player[2].Type, red)
screenrint(50,100,"Level: " .. Player[2].Level, red)
screen.flip()
while true do
screenrint(250,100,"Wolf's Health: " .. Wolf[2].Health, green)
screenrint(50,25,"Player's Health: " .. Player[2].Health, green)
screen:flip()

pad = Controls.read()
if pad:cross() and oldpad:cross() ~= pad:cross() and Wolf[2].Health > 0 then
Wolf[2].Health = Wolf[2].Health - 5
end

oldpad = pad
screen.waitVblankStart()
end
end


while true do
pad = Controls.read()
screen:clear()
for a = 0, 14 do
for b = 0, 8 do
screen:blit(32 * a, 32 * b, grass)
end
end
screen:blit(Player[1].x, Player[1].y, player)
screen:blit(Wolf[1].x, Wolf[1].y, wolf)

--Check to see if they are near enough to battle
xvalue = Player[1].x - Wolf[1].x
yvalue = Player[1].y - Wolf[1].y
if xvalue < 0 then
xvalue = xvalue * -1
end
if yvalue < 0 then
yvalue = yvalue * -1
end
if xvalue < 90 and yvalue < 40 or xvalue < 90 and yvalue <40 then
screen:clear()
Fight()
end

if pad:left() and Player[1].x > 0 then
Player[1].x = Player[1].x - 2
end

if pad:right() and Player[1].x < screenwidth then
Player[1].x = Player[1].x + 2
end

if pad:up() and Player[1].y > 0 then
Player[1].y = Player[1].y - 2
end

if pad:down() and Player[1].y < screenheight then
Player[1].y = Player[1].y + 2
end

screen.waitVblankStart()
screen.flip()
end

[emericaska8r]

the smileys should be periods and then a 'p' btw

[Tritoch]

hmm, sorry if this has been asked and answered before but i don't have time to trawl through 220 pages

I've managed to incorporate sounds in .wav format, but they take up too much space and are not good enough quality.

i was wondering how i go about making / converting to .XM format which was included with the luaplayer download.

thanks in advance, Tri

[imhotep]

xm is a tracker format, compare it to midi but the latter unfortunately is not included
you must keep the wavs at 11250,8-bit mono max, at least that's what i'm using, not to get in trouble with mikmod. (or you could compile a newer ver of mikmod or sth to play midis?)
wav 2 xm is not an option, just too big. (you could use a wav as a single track and use it like a sample)

[PSPduh]

In my code, all the graphics keep blinking and they should just stay in the center if you move the player close enough to the wolf. Also, the wolfs health should erase so the new value will not write over the old one. Here is my code, any help would be great!

grass = Image.load("grass.png")
player = Image.load("player.png")
wolf = Image. load("wolf.png")
oldpad = Controls.read()
red = Color.new(255,0,0)
green = Color.new(0,255,0)

screenwidth = 480 - player:width()
screenheight = 272 - player:height()

Player = {}
Player[1] = { x = 100, y = 50 }
Player[2] = { Health = 100, Weapon = "Sword", Level = 1, Type = "Warrior"}
Player[3] = { Exp = 0 }
Wolf = {}
Wolf[1] = { x = 250, y = 150 }
Wolf[2] = { Health = 100, Weapon = "Claws", Type = "Wolf", Level = 1}


--Label the fighting sequence for the Function fight
function Fight()
--Paste in the grass
for a = 0, 14 do
for b = 0,8 do
screen:blit(32 * a, 32 * b, grass)
end
end
--Paste player and enemy in center
screen:blit(75,125, player)
screen:blit(200,125, wolf)

screenrint(1,1,"Fight!!!")
screenrint(50,50,"Weapon: " .. Player[2].Weapon, red)
screenrint(250,125,"Weapon: " .. Wolf[2].Weapon, red)
screenrint(250,150,"Type: " .. Wolf[2].Type, red)
screenrint(250,175,"Level: " .. Wolf[2].Level, red)
screenrint(50,75,"Type: " .. Player[2].Type, red)
screenrint(50,100,"Level: " .. Player[2].Level, red)
screen.flip()
while true do
screenrint(250,100,"Wolf's Health: " .. Wolf[2].Health, green)
screenrint(50,25,"Player's Health: " .. Player[2].Health, green)
screen:flip()

pad = Controls.read()
if pad:cross() and oldpad:cross() ~= pad:cross() and Wolf[2].Health > 0 then
Wolf[2].Health = Wolf[2].Health - 5
end

oldpad = pad
screen.waitVblankStart()
end
end


while true do
pad = Controls.read()
screen:clear()
for a = 0, 14 do
for b = 0, 8 do
screen:blit(32 * a, 32 * b, grass)
end
end
screen:blit(Player[1].x, Player[1].y, player)
screen:blit(Wolf[1].x, Wolf[1].y, wolf)

--Check to see if they are near enough to battle
xvalue = Player[1].x - Wolf[1].x
yvalue = Player[1].y - Wolf[1].y
if xvalue < 0 then
xvalue = xvalue * -1
end
if yvalue < 0 then
yvalue = yvalue * -1
end
if xvalue < 90 and yvalue < 40 or xvalue < 90 and yvalue <40 then
screen:clear()
Fight()
end

if pad:left() and Player[1].x > 0 then
Player[1].x = Player[1].x - 2
end

if pad:right() and Player[1].x < screenwidth then
Player[1].x = Player[1].x + 2
end

if pad:up() and Player[1].y > 0 then
Player[1].y = Player[1].y - 2
end

if pad:down() and Player[1].y < screenheight then
Player[1].y = Player[1].y + 2
end

screen.waitVblankStart()
screen.flip()
end

Isnt the screen:flip() supposed to be screen.flip()?

[HaxxBlaster]

Is there a way how to see if the LuaPlayer doesn't find a file?
I mean so i can make it skip to load the ect. picure so it donsen't gives a error and forces you to restart?

This is the third time i ask this!

[PopcOrn DeVil]

the only way you can possibly do that (as far as I know) is put comment parts in your code then when you need it back to normal take away the comment marks.

[EminentJonFrost]

just explaining PopcOrn DeVil's answer.

-->anything in the same line as the "--" marks are not read.

>This line, however, is read and will result in an error since its not code.

[HaxxBlaster]

No no no! WTF, i am not stupid!

It's like this: In my program Graphic Creator 2.0, that will be released as soon as i fix this last piece. It would load the latest saved work you have done, BUT if you don't have any work done it would be an error "Couldent find the file (xx.png)", and you will be forced to restart the LuaPlayer.

I would like it to jump over the loading of the picure, i would be something with a "return" comand, no one seems to know how to use it.

[EminentJonFrost]

No no no! WTF, i am not stupid!

It's like this: In my program Graphic Creator 2.0, that will be released as soon as i fix this last piece. It would load the latest saved work you have done, BUT if you don't have any work done it would be an error "Couldent find the file (xx.png)", and you will be forced to restart the LuaPlayer.

I would like it to jump over the loading of the picure, i would be something with a "return" comand, no one seems to know how to use it.

how about in the part where you load the image. you put:

elseif error("Autostart error")
do return
end
end

i'm not sure if it'll work, its an educated guess.

[HaxxBlaster]

I don't see why that would work at all.
But where will the "elseif" fit in to?
It will give no use if there is no way to see if the image is no able to be load, it it would get that error, there is no way to "return" back.

I have thought about this much, and the only way to solve my problem is to know if the picture is succesfully loadable or not, but no one seems to know sheit about it.

[SG57]

hmmm.... I probably could do it... I just need the Lua Source adn edit the blitting function/prototype to an 'int' instead of a 'void', that way it will retrun something... i may look into it...

[HaxxBlaster]

Thanks man!

[PSPduh]

No no no! WTF, i am not stupid!

It's like this: In my program Graphic Creator 2.0, that will be released as soon as i fix this last piece. It would load the latest saved work you have done, BUT if you don't have any work done it would be an error "Couldent find the file (xx.png)", and you will be forced to restart the LuaPlayer.

I would like it to jump over the loading of the picure, i would be something with a "return" comand, no one seems to know how to use it.

Mayb something like this:

All your code here...
Then
screen:blit(x,y,xx.png)
if screen:blit(x,y,xx.png) == false then
screen:print(x,y,"You have not any saved work.", color)
end

I'm not the best lua coder...

[ShortyTymz40]

How do you get netlib v1.4 to work?

[emericaska8r]

Hi can anyone please help me with my program on page 220? I changed the screen.flip() but it still acts really weird.

[HaxxBlaster]

PSPduh:

I tryed that first of all my ideas to solve my problem, it doesn't work.
I think that it is what SGC is going to take a look at.

[emericaska8r]

Hey, nevermind about my program, i fixed it now by putting my whole function fight() as a loop, and put in a screen:clear() too. Thanks though.

[EminentJonFrost]

I don't see why that would work at all.
But where will the "elseif" fit in to?
It will give no use if there is no way to see if the image is no able to be load, it it would get that error, there is no way to "return" back.

I have thought about this much, and the only way to solve my problem is to know if the picture is succesfully loadable or not, but no one seems to know sheit about it.

you didnt post any code, so I assumed you made an 'if' statement out of the skip-of-nothing-is-there part of your app.

sorry, i'm no help to you here...I'm confident SG57 can fix your problem though!

[ZereoX]

Hi, i know somone here posted something about it but i can't find it.A sidescrolling code in lua like PSPsoldier to make someone move . counld somone help plz.

[emericaska8r]

Hey does anyone know of a 'goto' command in lua. Like instead of calling a function, just actually skip to a part of you code without have to go back. Like the lbl and goto functions on a ti-83+ calculator.

[PSPduh]

Hey does anyone know of a 'goto' command in lua. Like instead of calling a function, just actually skip to a part of you code without have to go back. Like the lbl and goto functions on a ti-83+ calculator.

hmmm.....mayb you could define a variable then check whether it equals a certain number, when it does equal that number then run the code.

duh = 0

if pad:cross() then
duh = duh + 1
end

if duh >= 2 then
duh = 1
end

if duh == 1 then
(insert code here)
end

On second thought, that might not answer your question. Well, I try.

[PSPduh]

I'm sorry for the double post, but how would you do that a certain button is held down for 5 seconds or something.

if pad:cross(180) then
<insert code here>
end

Would it be like that or another way?

[Altair]

nope another way. You have to use a timer.

And no there isn't a goto command and neither a label command. You have to use functions for this.

[SG57]

Hmm.... After looking throuigh the source, the Image loading is an integer, and it returns 1 on completion i belive, so give it a try.. So put a true or false statement, if the loading of an image is == 1, then it retruned completed, if not, do if not loadd an imgae ==1, then failed to load an image.

[EminentJonFrost]

Hi, i know somone here posted something about it but i can't find it.A sidescrolling code in lua like PSPsoldier to make someone move . counld somone help plz.

that someone suggested looking at the 'music' file bundled with luaplayer. it has a side-scrolling background.

[ZereoX]

Ok tkz il look at it tonight cause im at school.

[vettefan]

can someone tell we what's wrong with this please?
I tried making a quick game as a joke and It won't work.
I read quick guide and built it around what it said, and whenever I try launching it in luaplayer it says that there is no script file found. I tried saving it as both script.lua and index.lua. any help appreciated.

pimppicture=Image.load("pics/pimp.png")
kidpicture=Image.load("pics/kid.png")
mom=Image.load("pics/mom.png")
background=Image.load("pics/background.png")
winner=Image.load("pics/winner.png")
loser=Image.load("pics/loser.png")
distance=nul
timer=1
pimp=430
kid=300
while true do
timer=1
screen:clear()
pad=Controls.read()
	if pad:cross() then
	kid=kid-2
	end
kid=kid-.5
pimp=pimp-.5
	if kid=40 then
		while timer=1
		pad=Controls.read()
		screen:blit(0, 0, winner)
		screen.flip()
			if pad:cross() then
			timer=2
			end
		end
	end
distance=kid+30
	if pimp=distance then
		while timer=1
		pad=Controls.read()
		screen.blit(1, 1, loser)
		screen.flip()
			if pad:cross() then
			timer=2
			end
		end
	end
	screen.blit(0, 0, background)
	screen.blit(0, 100, mom)
	screen.blit(kid, 100, kidpicture)
	screen.blit(pimp, 100, pimppicture)
	screen.flip()
end

I wanted to make it so that you had to press the cross button really fast to move the kid over to the "mom" befoe the pimp catches him and shanks him.

[Gutya]

Your code is horribly hard for me to read.