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psygnus

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  1. Eureka! I had to kill the existing tween before creating the new one in order to get a smooth transition. Of course, that required keeping a reference of the object in order to have something to kill! The following code, based on your help and using my object oriented approach gives the best results! function MyObj(params) { this.obj = somedata; //construct canvas object this.tween = null; //declare tween and set to null on object creation //..rest of object constructor... }; MyObj.prototype.startTween = function(y, speed) { //"speed" is pixels per second this.tween = TweenLite.to(this.obj, Math.abs(y - this.obj.y) / speed, {y:y, ease:Linear.easeNone, onComplete:on_stop, onCompleteParams:[this.rNum]}); }; MyObj.prototype.stopTween = function() { this.tween.kill(); //Calculate new dest based on some other data newdest = some_calculations; startTween(newdest, speed); }; //create an object a = new MyObj(few_params); //start object tween like this a.startTween(1000, 200); //stop object tween on whatever event type you need simply calling stopTween() a.stopTween(); I am curious to find out what causes that tween jump, if you don't kill the first tween. My guess is that the re-calculations to change the tween on the fly are expensive enough to break the smooth motion(?) Anyway, thanks to your insight i got it. Thanks a million!
  2. Your code works almost perfectly, but i am getting a small but noticeable jump on the object tween when the function is executed. I am not sure how to address that, but i would like to try this if possible : Can i detect somehow the moment the object reaches the new destination y and stop/pause/kill the tween there? Thanks again for the help, really appreciate it.
  3. Thanks for the feedback. Sorry if i wasn't specific enough, i am actually tweening a canvas object (an easelJS container). I will try your approach, first thing tommorow (currently AFK). While i was waiting for feedback i tried to use updateTo by changing destination and calculating a new duration, but the result was not what i imagined. It worked but it was not smooth enough, like it made the object jump a few pixels abruptly. But it could have been wrong calculations. Is it weird that it kind of worked? Anyway i'm really thankful, will post more feedback tommorow.
  4. Hello, everyone! I would like some help in order to use updateTo function correctly. I create tweens like this : this.tween = TweenMax.fromTo(this.cont2, time/1000, {y:0}, {y:1000, ease:Linear.easeNone, onComplete:on_stop, onCompleteParams:[this.rNum]}); and i would like to be able to stop it during tweening, by setting a new destination y parameter. So i tried to do it like this : this.tween.updateTo({y:500}, false); but this is changing the object's current y position, and not the final y destination. So based on the documentation, i am changing the fromVars Object, instead the toVars Object. My question is, wether i can change the destination position on the fly, and how. Thanks in adnvance! EDIT : I was wrong. The above way to change destination y is correct! It seems like i have to change manually the duration of the tween also. That's why i was getting the wrong visual effect i was looking for. So i rephrase my question. Is there a way to tell the tween to stop at the new updated y parameter, regardless of the initial duration? Or do i have to calculate the distance covered, and figure out how much time it should get. Thanks, and sorry for the misunderstanding...!
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