CODEWITHSUNDEEP
androidiosluacoronasdk
kevin ver
kevin ver

Reputation: 851

Decrease Speed value LUA

How to increase movementSpeed by decreasing star1.movementSpeed = 10000; with -1 every 10 seconds.

i have tried this, but can't figure out what i am doing wrong

function initStar()
local star1 = {}
star1.imgpath = "Star1.png"; --Set Image Path for Star
star1.movementSpeed = 10000; --Determines the movement speed of star
table.insert(starTable, star1); --Insert Star into starTable
end --END initStar()    


 local function star1incr() -- increments Speed value every time it is called
 movementSpeed = movementSpeed - 1
 star1.movementSpeed = "movementSpeed: " .. movementSpeed 
 end

 timer.performWithDelay(10000, star1incr, 0)

Upvotes: 0

Views: 417

Answers (2)

kevin ver
kevin ver

Reputation: 851

Fixed by using

   local function star1incr()
        starTable[1].movementSpeed = starTable[1].movementSpeed - 1
        print( "- 1" )
    end

Upvotes: 2

Paul Kulchenko
Paul Kulchenko

Reputation: 26774

You need to have a variable you can share between initStar() and star1incr() (btw, "increment movementSpeed by decreasing ...movementSpeed doesn't sound right); something like this may work:

local star1 = {}

function initStar()
  star1.imgpath = "Star1.png" --Set Image Path for Star
  star1.movementSpeed = 10000 --Determines the movement speed of star
end --END initStar()    


local function star1incr()
  star1.movementSpeed = star1.movementSpeed - 1
end

timer.performWithDelay(10000, star1incr, 0)

star1 variable will be shared between initStar and star1incr functions (in Lua terminology it's called an upvalue).

Upvotes: 1

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