Lua Programming Help Thread

[Mundaka Inc.]

It's ok now, I've got it working like this...

-- Defining colors --
green = Color.new(0,255,0)
ball1 = Image.load("ball1.png")
ball2 = Image.load("ball2.png")
ball3 = Image.load("ball3.png")

-- Math --
pi = 4*math.atan(1)

-- Defining tables --
ball = {}
ball[1] = {ball = ball1, x = 20, y = 20, speed = 5000, angle = pi/8}
ball[2] = {ball = ball2, x = 40, y = 60, speed = 5000, angle = pi/8}
ball[3] = {ball = ball3, x = 60, y = 100, speed = 5000, angle = pi/8}

-- Functions --
function move()
  for k in pairs(ball) do
    screen:blit(ball[k].x, ball[k].y, ball[k].ball, true)
    ball[k].x = ball[k].x + ball[k].speed
    ball[k].y = ball[k].y + ball[k].speed
  end
end

function moving()
for k in pairs(ball) do
  a = ball[k].speed / 500
  if a >= 0 then
    if ball[k].x <= 6 or ball[k].x >= 460 then
      ball[k].angle = pi - ball[k].angle
    end
    if ball[k].y <= 5 or ball[k].y >= 252 then
      ball[k].angle = ball[k].angle * (-1)
    end
    ball[k].x = ball[k].x + math.cos(ball[k].angle) * a
    ball[k].y = ball[k].y + math.sin(ball[k].angle) * a
    ball[k].speed = ball[k].speed - 10
  end
  screen:blit(ball[k].x,ball[k].y,ball[k].ball,true)
end
end

while true do
  screen:clear()
  moving()
  
  screen.waitVblankStart()
  screen.flip()
end 

Thanks...

[Altair]

well i didn't do that much hehe but you're welcome!

[MexicanSnake]

can I play 2 sounds at the same time?? if there is a way post it please!!!

[c5cha7]

can I play 2 sounds at the same time?? if there is a way post it please!!!

Yes, You Can.

[GWKYOU]

How would i get it to sellect somthing in a list randomly? and if i have it load a txt would it see the info in hte txt as whats in it ex.: Viat(is the first line in the txt) i have it load Viat.txt and the value for tthe Viat.txt would be Viat?

[Grimfate126]

can anyone help me pls??

[Glynnder]

whats ur question grimfate?

[youresam]

my code:

pad = Controls.read()
dx = pad:analogX()
dy = pad:analogY()

        if math.abs(dx) > 32 then
		cursorx = cursorx + dx / 64
                          height = height +1
	end
	if math.abs(dy) > 32 then
		cursory = cursory + dy / 64
        end

how can i make it so that if the analog stik goes down, height decreases by 1?right now, if you go up or down, the height increases.

pad = Controls.read()
dx = pad:analogX()
dy = pad:analogY()

        if math.abs(dx) > 32 then
		cursorx = cursorx + dx / 64
                          height = height + math.ceil(1/dx)
	end
	if math.abs(dy) > 32 then
		cursory = cursory + dy / 64
        end

The math.ceil function will make it return either 1 or -1 based on if dx is positive or negative.

[jazazel]

I am having trouble with some random numbers. I have my code set up perfectly the way I want it and it works except that I get the same random numbers for different variables at times, which is not what I want. I have tried to counteract this by setting up kind of a checker system to detect like numbers in different variables and change them accordingly, however my efforts haven't succeded as of yet. I have an example of the type of code I am using and if anyone has any suggestions or now exactly whats up with it I will appreciate the advice/help.

function randomnumbers()
	var1 = math.random(1,4)
	var2 = math.random(1,4)
	var3 = math.random(1,4)
	var4 = math.random(1,4)

	if var2 == var1 then
		var2 = math.random(1,4)
	end
	if var2 == var3 then
		var2 = math.random(1,4)
	end
	if var2 == var4 then
		var2 = math.random(1,4)
	end
	if var3 == var1 then
		var3 = math.random(1,4)
	end
	if var3 == var2 then
		var3 = math.random(1,4)
	end
	if var3 == var4 then
		var3 = math.random(1,4)
	end
	if var4 == var1 then
		var4 = math.random(1,4)
	end
	if var4 == var2 then
		var4 = math.random(1,4)
	end
	if var4 == var3 then
		var4 = math.random(1,4)
	end
end

[Altair]

Have you used "random.seed(os.time( ))"? Thats makes the random "truly" random.

[montrob]

my code:

pad = Controls.read()
dx = pad:analogX()
dy = pad:analogY()

        if math.abs(dx) > 32 then
		cursorx = cursorx + dx / 64
                          height = height +1
	end
	if math.abs(dy) > 32 then
		cursory = cursory + dy / 64----- add height = height - 1
        height = height - 1
end

how can i make it so that if the analog stik goes down, height decreases by 1?right now, if you go up or down, the height increases.

I think that's what your talking about

[Greenskull]

okay, what is wrong with this?

yellow = Color.new(255, 255, 0)

math.randomseed(os.time() )

while true do
number = math.random(1,4)
if number == 1 then
screen:print(0, 0, "Poo", yellow)
end
if number == 2 then
screen:print(0, 0, "Monger", yellow)
end
if number == 3 then
screen:print(0, 0, "Turd", yellow)
end
if number == 4 then
screen:print(0, 0, "Face", yellow)
end
end

I dont know how to make the randomization start...

[soadnation]

the random should be fine

[soadnation]

i just tested it and it does work

forgot to hit edit.sorry for double post

[jazazel]

I assume that the two previous posts were directed toward my question. Assuming so, that's not what I"m trying to do. I'm printing 4 random variables to the screen at one time and I don't want any of them to be the same as another. An example would be if you put each variable as equaling math.random(1,4) for all 4 variables to print to the screen it would print a random variable for each one put there is a chance you would get two 1's or two 2's or three 1's. I am trying to develop a system that would check if any of the variables are the same and repeat randomizing numbers until one is found that isn't already used.

[Altair]

function randomnumbers()
while true do
var1 = math.random(1,4)
var2 = math.random(1,4)
var3 = math.random(1,4)
var4 = math.random(1,4)

if var2 == var1 then
var2 = math.random(1,4)
end
if var2 == var3 then
var2 = math.random(1,4)
end
if var2 == var4 then
var2 = math.random(1,4)
end
if var3 == var1 then
var3 = math.random(1,4)
end
if var3 == var4 then
var3 = math.random(1,4)
end
if var4 == var1 then
var4 = math.random(1,4)
end

if var1~=var2 and var2~=3 and var1~=var3 and var1~=var4 and var2~=4 and var3~=var4 then
break
end
end

[siqq]

I need help. I can get everything to work but the dPad.

--Basic Variables
white = Color.new(255,255,255)
titlePlay = Image.load("titlePlay.png")
titleInfo = Image.load("titleInfo.png")
titleExit = Image.load("titleExit.png")
titleNumber = 1
dPad = Controls.read()
--Main Menu
function mainMenu(titleNumber)
	if titleNumber == 1 then
		screen:blit(0,0,titlePlay)
		screen:flip()
	end
	if titleNumber == 2 then
		screen:blit(0,0,titleInfo)
		screen:flip()
	end
	if titleNumber == 3 then
		screen:blit(0,0,titleExit)
		screen:flip()
	end
	if titleNumber < 1 or titleNumber > 3 then
		screen:print(0,0,"error in titleNumber", white)
		screen:flip()
	end
end

--Main Menu D-Pad Controls
if dPad:right then
titleNumber = titleNumber + 1
mainMenu(titleNumber)
end

--I Dont Know
while true do
screen.waitVblankStart()
end

[jazazel]

Disregaurd my question. I figured it out myself :icon_bigg .

[nathan42100]

I need help. I can get everything to work but the dPad.

--Basic Variables
white = Color.new(255,255,255)
titlePlay = Image.load("titlePlay.png")
titleInfo = Image.load("titleInfo.png")
titleExit = Image.load("titleExit.png")
titleNumber = 1
dPad = Controls.read()
--Main Menu
function mainMenu(titleNumber)
	if titleNumber == 1 then
		screen:blit(0,0,titlePlay)
		screen:flip()
	end
	if titleNumber == 2 then
		screen:blit(0,0,titleInfo)
		screen:flip()
	end
	if titleNumber == 3 then
		screen:blit(0,0,titleExit)
		screen:flip()
	end
	if titleNumber < 1 or titleNumber > 3 then
		screen:print(0,0,"error in titleNumber", white)
		screen:flip()
	end
end

--Main Menu D-Pad Controls
if dPad:right then
titleNumber = titleNumber + 1
mainMenu(titleNumber)
end

--I Dont Know
while true do
screen.waitVblankStart()
end

Put everyting but the variable defines in the while true loop. Don't forget screen:clear()

[siqq]

testing...

[edit] It didnt work my code looks like this now.

--Basic Variables
white = Color.new(255,255,255)
titlePlay = Image.load("titlePlay.png")
titleInfo = Image.load("titleInfo.png")
titleExit = Image.load("titleExit.png")
titleNumber = 1
pad = Controls.read()

while true do
--Main Menu
function mainMenu(titleNumber)
	if titleNumber == 1 then
		screen:clear()
		screen:blit(0,0,titlePlay)
		screen:flip()
	end
	if titleNumber == 2 then
		screen:clear()
		screen:blit(0,0,titleInfo)
		screen:flip()
	end
	if titleNumber == 3 then
		screen:clear()
		screen:blit(0,0,titleExit)
		screen:flip()
	end
	if titleNumber < 1 or titleNumber > 3 then
		screen:clear()
		screen:print(0,0,"error in titleNumber", white)
		screen:flip()
	end
end

--Main Menu D-Pad Controls
if pad:right() and titleNumber < 3 then
titleNumber = titleNumber + 1
mainMenu(titleNumber)
end
if pad:left() and titleNumber > 1 then
titleNumber = titleNumber - 1
mainMenu(titleNumber)
end
end

[nathan42100]

whats the error?

[natan333]

Hi guys. i just stared messing up with lua yesturday night
and i m starting to love this

I have a question though

blue = Color.new(0 , 153, 255)

screen.waitVblankStart(50)
screen:print(200, 100, "Hello!", blue)
screen.flip(0)
screen.waitVblankStart(50)
screen.flip(0)
screen.waitVblankStart(50)
screen.flip(0)
screen.waitVblankStart(50)
screen.flip(0)
screen.waitVblankStart(50)
screen.flip(0)
screen.waitVblankStart(50)
screen.flip(0)
screen.waitVblankStart(50)
screen.flip(0)

while true do
screen.waitVblankStart()
end

To make the word blink again and again nonstop i have to copy screen.waitVblankStart(50 )
screen.flip(0)
and make a long list ?? or is there is a code to make it repeat blinking for ever?

I also have some questions
there is a site that i got here from sam that have codes like this for an example but cant figure out
http://wiki.ps2dev.org/psp:lua_player:functions is the site

Font Font:setCharSize(number width, number height, number dpiX, number dpiY)

image:clear([color = transparent-black])

where do i put the numbers ? please post an example with the numbers filled in so i can learn

Thanks!

[nathan42100]

blue=Color.new(0,153,225)
while true do
screen:clear()
for i=1,50 do
	if i=1 and blit=false then
		blit=true
	end
	if i=1 and blit=true then
		blit=false
	end
	if blit then		  
		screen:print(200, 100, "Hello!", blue)
	end
end
screen.flip()
screen.waitVblankStart()
end

That should work.

[natan333]

hmm the end and the spaces confuse me becuase i just started this
and the site that i put below explain what the codes do but i think it dosent have all the codes for me to learn
i will try to understand

[soadnation]

testing...

[edit] It didnt work my code looks like this now.

--Basic Variables
white = Color.new(255,255,255)
titlePlay = Image.load("titlePlay.png")
titleInfo = Image.load("titleInfo.png")
titleExit = Image.load("titleExit.png")
titleNumber = 1
pad = Controls.read()

while true do
--Main Menu
function mainMenu(titleNumber)
	if titleNumber == 1 then
		screen:clear()
		screen:blit(0,0,titlePlay)
		screen:flip()
	end
	if titleNumber == 2 then
		screen:clear()
		screen:blit(0,0,titleInfo)
		screen:flip()
	end
	if titleNumber == 3 then
		screen:clear()
		screen:blit(0,0,titleExit)
		screen:flip()
	end
	if titleNumber < 1 or titleNumber > 3 then
		screen:clear()
		screen:print(0,0,"error in titleNumber", white)
		screen:flip()
	end
end

--Main Menu D-Pad Controls
if pad:right() and titleNumber < 3 then
titleNumber = titleNumber + 1
mainMenu(titleNumber)
end
if pad:left() and titleNumber > 1 then
titleNumber = titleNumber - 1
mainMenu(titleNumber)
end
end

im not exactly sure what your error was but after messing with it for a minute or two i got it to display the images when u move the dpad. im not sure if this is what u want however. Also I changed some of the picture names(the ones it loads not the variables) because i didnt have your pictures. I also have a background image added which is just a white picture

--Basic Variables
white = Color.new(255,255,255)
titlePlay = Image.load("Ball.png")
titleInfo = Image.load("PlayerRight.png")
titleExit = Image.load("PlayerLeft.png")
titleNumber = 1
background = Image.load("background.PNG")

function mainMenu()
	if titleNumber == 1 then
		screen:blit(0,0,titlePlay  )
	end
	if titleNumber == 2 then
		screen:blit(0,0,titleInfo  )
	end
	if titleNumber == 3 then
		screen:blit(0,0,titleExit  )
	end
	if titleNumber < 1 or titleNumber > 3 then
		screen:print(0,0,"error in titleNumber", white)

	end
end
while true do
screen:clear()
screen:blit(0, 0, background,  false)
pad = Controls.read()

if pad:start() then
	break
end
--Main Menu D-Pad Controls
if pad:right() and titleNumber < 3 then
titleNumber = titleNumber + 1
mainMenu()
end
if pad:left() and titleNumber > 1 then
titleNumber = titleNumber - 1
mainMenu()
end
screen.flip()
end

[siqq]

testing...

[edit]I think it will work BUT...

in lua player for windows how do you move the d pad? ive tried all arrows and pressed like every button but it does nothing. i thought it was the arrows but i guess not.[/edit]

[natan333]

nathan42100 i tryed the code , dint work . the window shuts down after 0.5 seconds

[soadnation]

i havent used lua player windows in a while but im pretty sure its the arrow keys. also the images will flash real7y quick

[natan333]

for i=1,50 do
if i=1 and blit=false then blit=true end
if i=1 and blit=true then blit=false end if blit then

What does this code mean ?
i think this is not correct becuase i deleted the spaces to no make me crazy

[siqq]

i havent used lua player windows in a while but im pretty sure its the arrow keys. also the images will flash real7y quick

why wont they stay?

[edit]and i dont think its working at all cause when i press start to break the program it does nothing as well[/edit]