Always random numbers

Hello again))

Is there any way to ensure that math.random function will always get different numbers?

i have this set up, but images often repeated, i'd like them to be different every time and not match

math.randomseed( os.time() )
 
local shipTable = {
 
 
        {img = "rocketShip1.png", color = "green"},
        {img = "rocketShip2.png", color = "blue"},
        {img = "rocketShip3.png", color = "red"}
        
        }
        
maxImages = 3
t = {}
        
for many=1, maxImages do
 
local i = math.random(#shipTable)
 
        t[many] = display.newImage(shipTable[i].img)
        t[many].color = shipTable[i].color
        t[many].x = math.random(50,300)
        t[many].y = math.random(50,300)
        
        local function onTouch(event)
                
                        print(image.color)
                
        end
        
        t[many]:addEventListener("touch", onTouch)
 
end

Nope. But you can save the last math.random number and check it if it's diffrent.

something like

local lastRandomNumber = 0
 
local function random(min,max)
        local r = math.random(min,max)
        if r==lastRandomNumber then
                return random(min,max,oldValue)
        else
                lastRandomNumber = r
                return r
        end
end
 
 
 for i=0,20 do
        print(random(1,2))
 end

i tried it with my function and still object came out two of them same...

local lastRandomNumber = 0
 
local function random(min,max)
        local r = math.random(min,max)
        if r==lastRandomNumber then
                return random(min,max,oldValue)
        else
                lastRandomNumber = r
                return r
        end
end
 
local shipTable = {
 
 
        {img = "rocketShip1.png", color = "green"},
        {img = "rocketShip2.png", color = "blue"},
        {img = "rocketShip3.png", color = "red"}
        
        }
        
maxImages = 3
t = {}
        
for many=1, maxImages do
 
local i = random(1,3)
 
        t[many] = display.newImage(shipTable[i].img)
        t[many].color = shipTable[i].color
        t[many].x = math.random(50,300)
        t[many].y = math.random(50,300)
        
end

you didn't call the random function, but math.random :)

i did called "random" function in line 27: local i = random(1,3)
...

Oh right. Sorry I've just skipped through your code. hmm.. That's odd.
Could you zip a little sample for me?

http://www.2shared.com/file/r4_dgfAr/codepiece.html

here

Strange. Maybe because it's looping before it can create the new number.. Dunno..
You could also make a table from and fill it and afterwards shuffle it!

Here are 2 shuffle functions for you:

local function randomizeArray(arr)
        for i = #arr, 2, -1 do -- backwards
                local r = math.random(i) -- select a random number between 1 and i
        arr[i], arr[r] = arr[r], arr[i] -- swap the randomly selected item to position i
        end  
        return arr
end
local function randomizeArrayAlt(arr)
        local len = #arr
        for i = 1, len, 1 do -- backwards
                local ran = math.random(1,len) -- select a random number between 1 and i
                local char = arr[ran]
                arr[ran] = arr[i]
                arr[i] = char
        end
        
        return arr
end

thanks for shuffling functions, it will come in handy
thanks for help, you're awesome)

by the way, do you have a skype account?

No Problem.

Too bad I couldn't fix your problem :/ Damnit!

Sure: search for xxxfanta ;)

views:1615 update：2011/11/25 8:45:21


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