Looping functions

Games
#1

I’m am having a slight problem with my code that I have here. What I am trying to accomplish here is a loop of animation. First animation boy holds up ball when user touches word ball. Second animation boy throws ball when word throw is touched. Third is where I am having an issue. I have a .png image of a ball transitioning from the right side of the screen. on completion I want the ball to remove itself because an animation of a boy catching the ball plays when the ball comes back. Heres my code that I got so far [lua]display.setStatusBar( display.HiddenStatusBar ) – HIDE STATUS BAR

wordArray = {}

local i = 1

local loqsprite = require(‘loq_sprite’)

local screenW = display.contentWidth
local screenH = display.contentHeight

local BG = display.newImageRect(“background.png”, 1024, 768)
BG.x = screenW/2; BG.y = screenH/2

local words = { “Ball”,“Throw”, “catch”, “Bounce”, “Fall”}
local listener

local bfactory = loqsprite.newFactory(“boy”)
local boy = bfactory:newSpriteGroup()
boy.x = 600; boy.y = 430
boy:prepare(“aniBoy ball”)

local ballfactory = loqsprite.newFactory(“ball”)
local ball = ballfactory:newSpriteGroup()
ball.x = 830; ball.y = 550
ball:play(“aniBall ball”)
ball.alpha = 0

function throwBall (event)
ball.alpha = 1
ball.x = 830; ball.y = 550
transition.to( ball, { time=1000, x = 3200 } )
end

function bounceBall(event)
ball:prepare(“aniBall bounce”)
ball.x = 830; ball.y = 550
ball:play(“aniBall bounce”)
end

function boyBounce ()
boy:play(“aniBoy throw”)
timer.performWithDelay(500, bounceBall, 1 )
end

function catchBall (event)
boy:play(“aniBoy catch”)
end

local function removeBall( _t)
_t:removeSelf()
_t = nil
end

function throwBack ()
transition.to( ball, { time=1000, x = 850, y = 600, onComplete=removeBall})
timer.performWithDelay(500, catchBall, 1 )
end

function boyThrow ()
boy:play(“aniBoy throw”)
timer.performWithDelay(500, throwBall, 1 )
end

atrace(xinspect(ball:getSpriteNames()))
atrace(xinspect(boy:getSpriteNames()))

listener = function( event )

local phase = event.phase
local word = event.target

if ( phase == “ended” ) then

local function complete()

word.alpha = 0.5

local newIndex = (word.index % #words)+1
words[newIndex].alpha = 1

word:removeEventListener( “touch”, listener )
words[newIndex]:addEventListener( “touch”, listener )
end

– delay new word highlight if needed
timer.performWithDelay ( 100, complete )

– animations
if word.index == 1 then boy:play(“aniBoy ball”)
elseif word.index == 2 then boyThrow ()
elseif word.index == 3 then throwBack ()
elseif word.index == 4 then boyBounce ()

end
end
end

– draw words
for i=1,#words do

local word = display.newText ( words[i], 222, 222, native.systemFont, 46)
word.x, word.y = 120, 120 * i
word:setTextColor( 255,0,0 )

word.index = i
words[i] = word
word.alpha = 0.5

end

words[1].alpha = 1
words[1]:addEventListener( “touch”, listener )[/lua]
I am getting this error Runtime error
…9GNQo1k+++TI/-Tmp-/TemporaryItems/372/loq_sprite.lua:320: attempt to call method ‘removeSelf’ (a nil value)
stack traceback:
[C]: in function ‘removeSelf’
…9GNQo1k+++TI/-Tmp-/TemporaryItems/372/loq_sprite.lua:320: in function ‘prepare’
…ZS-a189GNQo1k+++TI/-Tmp-/TemporaryItems/372/main.lua:36: in function ‘_listener’
?: in function <?:446>
?: in function <?:215>

Can any buddy please help me

thanks

[import]uid: 51459 topic_id: 15786 reply_id: 315786[/import]

#2

Without reading all your code, if you are getting told that removeSelf is a nil value you to check out the line the error is on (can’t tell here) and see WHY it would be a nil value :wink: [import]uid: 52491 topic_id: 15786 reply_id: 58346[/import]

#3

It’s this part peach [lua] local function removeBall( _t)
_t:removeSelf()
_t = nil
end[/lua]

This removes the ball that comes from the right of the screen. I want to do this because I have an animation of the ball already holding the ball that plays after the ball reaches the boy… What I need to know is how I can tell the program to unRemove the ball so that it has that replay value…
Thanks

PEACH

Have fun in Calli

Say hi to BeeBe for me! [import]uid: 51459 topic_id: 15786 reply_id: 58363[/import]

#4

What happens if you change it to this;

[lua]local function removeBall()
ball:removeSelf()
ball = nil
end[/lua] ?

Same error, no error, different error?

Thanks Jake - I’m sure I’ll have a good time :slight_smile: Will pass on your greetings.

Peach :slight_smile: [import]uid: 52491 topic_id: 15786 reply_id: 58554[/import]