[MotionPath - progress value problem]

This is exactly what I was trying to achieve. One more time thanks Jack .

[MotionPath - progress value problem]

I've created a custom CirclePath2D class in with I've overridden the set progress function (see attached) so that I could calculate the progress change on flight. I'm tweening the progress value like this:

 

var direction:String = Direction.COUNTER_CLOCKWISE;
var progress_change:Number = -0.08333333; // it can also be -2.5 or 0.012222222 - it is beeing calculated dynamically
TweenLite.to(circle_motion_path, 2, {progress: circle_motion_path.progress + progress_change,
						onStart: motionPathDirection,
						onStartParams: [direction]});
//circle_motion_path is CustomCirclePath2D object
//circle_motion_path.progress is 0 on start

private function motionPathDirection(direction:String):void
{			
circle_motion_path.direction = direction;
} 

In onStart function I'm setting manually the direction of progress change to "tell" what kind on calculations should be made in overridden set progress function.

 

But this doesn't always work well as I've made it. Especially when quick jumping from progress: 0 to progress: -1.25.

 

Is it clearer now? Please chech this link to see the example: http://pszajna.ires.pl/index.html maybe it will explain the problem better. Each time I'm jumping to next point I want to calculate how the progress value changes from point 0 to point 1.

[MotionPath - progress value problem]

Jack one more thing about MotionPath. How can I calculate "rotation" value of MotionPath? By "rotation" I mean the number of full revolutions based on progress value change. So lets say if I'm changeing the progress from 0 to -0.0833333

 

TweenLite.to(circle_motion_path, 2, {progress: circle_motion_path.progress + (-0.0833333)});

//circle_motion_path.progress is 0

 

the "rotation" value should be 0.083333 and so on. In other words CCW direction should increase "rotation" value and CC should decrease it.

 

Could You give me some advice how can I achieve that?

[MotionPath - progress value problem]

Yep, I've found many articles about it. In my case it's generating a random error because I've a conditional like this:

 

if(progress > 1 && progress < 0)
{
  ...
}
else
{
  // very important actions
}

 

and it is very important for me that progress is 0 not "almost" 0. I've fixed this by rounding progress prop to 12 decimal places. I hope it will work.

[MotionPath - progress value problem]

hi I'm getting a weird progress value after tweening MotionPath progress property. I've created a CirclePath2D object (it progress prop is set to 0). Next I've calculated the progress change value:

 

var progress_change:Number = circle_motion_path.anglesToProgressChange(circle_motion_path.progressToAngle(circle_motion_path.progress), -1110, Direction.COUNTER_CLOCKWISE);
// result: -0.08333333333333333

 

Finally I'm tweening:

 

TweenLite.to(circle_motion_path, 5, {progress: circle_motion_path.progress + progress_change, onComplete: navigationToStopComplete});

 

and trace'ing the circle_motion_path.progress prop in the navigationToStopComplete function results: 329.99999999999994 instead of 330. I'm guessing that this has something to do with the floating point math but I'm not sure.

 

How can it be fixed?

 

Please help.

[MotionPath.addFollower - PathFollower progress prop problem]

Yep, I was thinking about this solution and if you also suggest something like this I will use it . It will help me with some other things I've got to handle.

 

Thanks for help

[MotionPath.addFollower - PathFollower progress prop problem]

Jack shouldn't the f.cachedProgress in progress setter (in MotionPath class) be also changed to f.progress? The new class works fine when I add followers but when tweening nothing happenes. The distribute function also modifies f.cachedProgress.

[MotionPath.addFollower - PathFollower progress prop problem]

Super thanks Jack. I will try it right away.

[MotionPath.addFollower - PathFollower progress prop problem]

Because I've extended the PathFollower class to monitor the progress property in the progress setter. I'm building a carousel and I want to manage elements by PathFollower progress property like:

 

override public function set progress(value:Number):void
{
super.progress = value;

if(super.progress < 0.75)
{
  super.target.alpha = 0;
}
}

 

My current concept is that each of the pathFollowers should monitor its progress and perform actions on their targets.

 

Jack if you have any suggestions how to achieve that please give me a tip .

[MotionPath.addFollower - PathFollower progress prop problem]

Hi Jack.

 

Why are You using the: f.cachedProgress property rather than f.progress in the addFollower function in the MotionPath class?

[altering width of CirclePath2D results width=0]

Thanks for help Jack. I'm downloading the latest ver.

 

Cheers

[altering width of CirclePath2D results width=0]

hi I'm trying to create an oval motion path by this code:

var circle_motion_path:CirclePath2D = new CirclePath2D(100, 100, 50);
circle_motion_path.height = 100;
trace(circle_motion_path.height); // results 0

what am I doing wrong?

[Clear ImageLoader on IOError Event]

Thank you for answering my questions.

[Clear ImageLoader on IOError Event]

Yes, that makes sens and answers my question but I've got one more is it possible to set onComplete handler other way then in constructor vars properties. Let's say that I want to call load() several times on the same loader object but with diffrent onComplete handlers and I don't want to call the whole constructor method each time but only set the new url and new onComplete handler like:

var img_loader = new ImageLoader(imagePath, {name: "logo",
                                                 container: logo_container,
                                                 x: 0,
                                                 y: 0,
                                                 width: 50,
                                                 height: 27,
                                                 scaleMode: "proportionalInside",
                                                 centerRegistration: true,
                                                 onIOError: onLogoLoadError,
                                                 onComplete: onLogoLoadComplete});
img_loader.load();

function onLogoLoadComplete(le:LoaderEvent):void
{
       img_loader.url = "some_url";
       img_loader.onComplete = newOnCompleteHandler;
       img_loader.load(true);
}

[Clear ImageLoader on IOError Event]

Not exactly autoDisposse: true fires dispose() automaticly onComplete that's clear to me. But is dispose() fired when loader dispatches IO_ERROR event or do I have to do it manually? What happenes then to the loader I mean after IO_ERROR occurs? Now I'm making it eligible for GC by this code

private function onLogoLoadError(le:LoaderEvent):void
     {
        img_loader.dispose();
        img_loader = null;
     }

is that ok? My previous question wasn't clear enough I think .

[Clear ImageLoader on IOError Event]

Hi I've just started my adventure with ImageLoader and I've got a question about IO_ERROR event. How can I clear the loader when it dispatches LoaderEvent.IO_ERROR? Can it be done by this code:

 

private function loadLogo(imagePath:String):void
	{			
		img_loader = new ImageLoader(imagePath, {name: "logo",
															  container: logo_container,
															  x: 0,
															  y: 0,
															  width: 50,
															  height: 27,
															  scaleMode: "proportionalInside",
															  centerRegistration: true,
															  onIOError: onLogoLoadError,
															  onComplete: onLogoLoadComplete});
		img_loader.load();
	}

	private function onLogoLoadError(le:LoaderEvent):void
	{
		img_loader.dispose();
		img_loader = null;
	}

	private function onLogoLoadComplete(le:LoaderEvent):void
	{
		TweenLite.to(blackout_layer, 1, {alpha: 0});

		onLogoLoadError(null);
	}

 

I simply want to nullify img_loader in onLogoLoadError.

[Tweening alpha from 0 to 0]

The sample code I've posted above was part o a larger project. There was no need to paste the showMC function .

 

Greensock rocks.

[Tweening alpha from 0 to 0]

Thanks for the reply. I've made a workaround by setting the code like this:

 

TweenLite.to(mc, (mc.alpha == 0 ? 0 : 1) , {alpha: 0, onComplete: showMC});

 

maybe it will help someone. It worked in my case.

[Tweening alpha from 0 to 0]

Hi

 

I've got a movie clip on stage with alpha set to 0 (in Flash CS5) and I want to tween it to 0:

 

TweenLite.to(mc, 1, {alpha: 0, onComplete: showMC});

 

and my problem is that tween is running for 1s (traceing mc.alpha in onUpdate function results always 0) instead of fire onComplete imediatley. Is this a bug or intended action?