feature suggestion

alexzheng · October 2011

easing function is a great feature for making animation, it would be much better if it support to pass a callback function and parameter to be called after the animation finished. For examle, when an enemy died,it plays a dying animation then call a function to do some cleanup job

for examle:
local mc = MovieClip.new{
{1, 100, sprite1, {x = {0, 200, "linear"}, callback, parameter},
{50, 150, sprite1, {y = {0, 100, "linear"}, {alpha = {0, 1, "easeOut"}},
{100, 200, sprite2, {x = {0, 200, "linear"}},
}

and
GTween.new(sprite, 2, {x = 240}, {delay = 0.2, ease = easing.outBounce, repeatCount = 2, reflect = true}, callback, parameter)

or use a action sequence such as cocos2d

atilim · October 2011

For GTween you can do this. You have 2 options:

1. By giving onInit, onChange and onComplete parameters:

GTween.new(sprite, 2, {x = 240}, {onComplete = callback})

2. By adding listener for "init", "change", and "complete" events

local tween = GTween.new(sprite, 2, {x = 240})
tween:addEventListener("complete", callback, parameter) -- here parameter is optional
tween.dispatchEvents = true

I don't have more information about action sequences but you can set nextTween field of a tween to cascade tweens:

local tween1 = GTween.new(...)
local tween2 = GTween.new(...)
tween1.nextTween = tween2

For MovieClip you're right. We're planning to improve MovieClip more.

Thank you for suggestions

alexzheng · October 2011

hi atilim
thank you
I got it
EventDispatcher is a greate feature.
does MovieClip dispatch some event after reach the specified frame

atilim · October 2011

Currently MovieClip doesn't support event dispatching. But we definitely improve it (with the next version) and add event dispatching capabilities.

alexzheng · October 2011

hi atilim

local tween1 = GTween.new(...)

local tween2 = GTween.new(...)

tween1.nextTween = tween2
did you mean tween2 take place after tween1 is completed??

I wirte the following code
local tween = GTween.new(sprite, 0.1, {x = sprite:getX()+40}, {delay = 0, ease = easing.inoutElastic, repeatCount = 6, reflect = true})
local tween2 = GTween.new(sprite, 0.1, {alpha = 0}, {delay = 0, ease = easing.inoutElastic, repeatCount = 6, reflect = true})
tween.nextTween = tween2

I seems tween and tween2 take palce simultaneously,just the same as without the line "tween.nextTween = tween2"

atilim · October 2011

You're right. I forgot to tell that you need to set tween2 paused:

local tween = GTween(...)
local tween2 = GTween(...)
tween2:setPaused(true)
tween.nextTween = tween2

atilim · October 2011

Also can you update your gtween.lua with this: http://dl.dropbox.com/u/684866/gtween.lua

I've fixed a bug that can cause "invalid key to next"

OZApps · April 2012

@Atilim, is the eventListener automatically removed?

atilim · April 2012

@OZApps, when a GTween object completes, it's GCed and therefore its event listeners are removed.

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