How to put object x and y positions in array

Getting Started Newbie Questions
#1

is it possible ?
objectPosition = { (120,230) , (232,340) , (34,340) } something like this ?
I need do math.random on my objects positions…

Or maybe…
objectPositions = {}

object = {}
object.x = 100
object.y =200
table.insert(objectPositions, object)

any better idea ?

[import]uid: 13156 topic_id: 11262 reply_id: 311262[/import]

#2

This should work:

[code]

math.randomseed( os.time() )

local objectPositions = {}

objectPositions[#objectPositions + 1] = { x = 10, y = 50 }
objectPositions[#objectPositions + 1] = { x = 250, y = 10 }
objectPositions[#objectPositions + 1] = { x = 16, y = 3 }
objectPositions[#objectPositions + 1] = { x = 67, y = 548 }
objectPositions[#objectPositions + 1] = { x = 34, y = 193 }
objectPositions[#objectPositions + 1] = { x = 54, y = 305 }

local randomPosition = objectPositions[math.random( 1, #objectPositions )]

print( "Random X: … randomPosition.x … " - Random Y: " … randomPosition.y )

[/code] [import]uid: 5833 topic_id: 11262 reply_id: 40842[/import]

#3

cool thank you… AGAIN :slight_smile: [import]uid: 13156 topic_id: 11262 reply_id: 40843[/import]

#4

No worries :slight_smile: [import]uid: 5833 topic_id: 11262 reply_id: 40844[/import]

#5

Hi GrahamRanson… what do you think… is there a better way to pick up 10 different and random numbers ? Can you take a look if you will have a second.

 getNumber = function()  
 local newNumbers = {}  
 local number  
 for i=1,10 do  
 number = math.random(1,90)  
 table.insert(newNumbers, i , number)  
 if number == newNumbers[i] then  
 newNumbers[i] = math.random(1,90)  
 end  
 end  
 table.sort(newNumbers)  
 print (table.concat(newNumbers, ", "))  
 end

Thank you for your time. :slight_smile:
but… I thought that this code is working but is not :frowning: [import]uid: 13156 topic_id: 11262 reply_id: 41645[/import]

#6

This should work:

[code]

math.randomseed( os.time() )

local getRandomNumbers = function( count, allowDuplicates, range )

local numbers = {}

while #numbers < count do

local number = math.random( range.min, range.max )

local numberCanBeAdded = true

if not allowDuplicates then
for j = 1, #numbers, 1 do
if numbers[j] == number then
numberCanBeAdded = false
break
end

end
end

if numberCanBeAdded then
numbers[#numbers + 1] = number
end

end

return numbers

end

– Ten unique numbers between 1 and 90
local numbers = getRandomNumbers( 10, false, { min = 1, max = 90 } )

for i = 1, #numbers, 1 do
print( numbers[i] )
end

[/code] [import]uid: 5833 topic_id: 11262 reply_id: 41692[/import]

#7

Thank you GrahamRanson…

That day will came and I will help you too. promise: ) [import]uid: 13156 topic_id: 11262 reply_id: 41861[/import]

#8

I’m sure it will and I look forward to it :slight_smile: [import]uid: 5833 topic_id: 11262 reply_id: 41884[/import]

#9

Graham, is there any chance you could explain how to use the above code?

I’m after something similar (spawning objects with random pre-set positions) but can’t seem to get it to work.
Thanks [import]uid: 40538 topic_id: 11262 reply_id: 48606[/import]

#10

All that code does is get a list of random numbers. You could do something like this to get random positions:

[code]

math.randomseed( os.time() )

local getRandomPosition = function()

local x = math.random( display.contentWidth )
local y = math.random( display.contentHeight )

return x, y

end

local posX1, posY1 = getRandomPosition()
local posX2, posY2 = getRandomPosition()

[/code] [import]uid: 5833 topic_id: 11262 reply_id: 48685[/import]