transition.to, alpha

duke2017 · August 2012

Please tell me a simple way the appearance of objects is similar transition.to in corona sdk. I want to object to appear gradually or easing discoloration from one to another color(for example to red, like object heating)

in corona its looks like:
shield= display.newRect( 180, 220, 10, 80 )
shield:setFillColor(150,0,50,80)
shield.name="gate"
shield.alpha = 0
transition.to( shield, { alpha=1, time=150 } ) -- object appears gradually
physics.addBody( shield, "static", lipElement )
group:insert( shield )

Working with the visibility of the object over time is possible only through MovieClip or are there other decision?

talis · August 2012

@duke2017 the thing you are searching for is Gtween object. Here is a small code fragment for you. But there is lot more in Gtween of course, not only playing with alpha values.

 GTween.new(sprite, 2, {alpha = 0})
 GTween.new(sprite, 2, {alpha = 1}, {delay = 3.0})

talis · August 2012

Look here for details:
http://appcodingeasy.com/Gideros-Mobile/Gideros-GTween-with-easing

OZApps · August 2012

@duke2017,
GTWeen is an amazing library, however if you want to keep playing with your code that you might have written using C*SDK, you can look at Shandy (The C*SDK compatibility layer) it allows you to run most of your display related code in Gideros. Here is a video of the code you posted running in gideros.

duke2017 · August 2012

Big thanks to all for answer!

duke2017 · August 2012

By the way, on the C*SDK I do not want to go back. gideros liked more for its flexibility and the opportunity and save my nerves, compared with the C*SDK)
Shandy is a good idea, but I completely rewrote the code from the beginning on gideros)

OZApps · August 2012

@duke, always nice to hear when people start afresh, but for those that can't there is always Shandy

john26 · August 2012

@OZApps, does this mean Shandy is now available?

I've also (mostly) rewritten my corona game. Took about 2 weeks to convert 3000 lines of code. I was assuming Shandy would not be ready for a while...?

gorkem · August 2012

@john26 it'd be nice to have a blog post or similar that tells the similarities and differences between two frameworks, when you have time. I believe many devs out there will be very excited to read it.

OZApps · August 2012

@john26, yes Shandy is available... in fact there are a couple of developers that have been trying it, I am awaiting feedback from them on their experience positive or with requests/bugs.

In fact while I was working on Shandy, I ended up with a pure Gideros Implementation of TableView in Lua (no plug-ins) this can be used on both Android and iOS and still look the same.

john26 · August 2012

@gorkem: thanks very much for your interest. Yes, I can write such a post soon. I'll include actual chunks of code side by side (what HTML markup would be best for that?). What category should I put it under?

I must say the main difference is that Gideros works whereas Corona is full of bugs! My code contained numerous workarounds for Corona bugs yet everything worked first time in Gideros! (and Corona bugs rarely get fixed despite multiple complaints on the forum: every bug I found had been highlighted at least 12 months previously) So congratulations on an amazingly solid product!

@OZApps: Thanks for that reply. Does Shandy implement physics yet? I had a look at your "what works" list on another thread which seems to indicate no. Is that still up to date?

OZApps · August 2012

@john26, No I am not attempting the Physics, the Display, Timer, Runtime, System and a few native are all that I have working. Gideros offers better handle on the Box2D engine, wouldn't want to water that down

gorkem · August 2012

"water down"... didnt know we also had the same phrase with a same meaning. Thanks for reminding that.

@john26 any markup will do, and "Step by step tutorials" would be best. In fact I'd say, put it in a blog of you so we can have a static link where anyone can point to. None did this exclusively before, but everybody is asking for it.

john26 · August 2012

OK, I'll set up a blog and let you know when I have some useful entries!

gorkem · August 2012

Setting up a blog may take some time - if you wish, just post it here and then you can copy & paste everything to your blog when it's set up..

Of course it's up to you..

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