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jamesbcn

Moving from [current] to [label] in a timeline?

Warning: Please note

This thread was started before GSAP 3 was released. Some information, especially the syntax, may be out of date for GSAP 3. Please see the GSAP 3 migration guide and release notes for more information about how to update the code to GSAP 3's syntax. 

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In this codepen example I have five buttons, and a timeline with five labels. 

 

When clicking on a button I want to move from the current location in the timeline, to the label corresponding to the button. In other words if you click on button 2, the animation should go from wherever it currently is to the point at label "two", so if it was previously at "one" the timeline should play forward from label "one" to "two", but if it was at position "three" it should play backwards from "three" to "two". 

 

 

How do I do this? 

 

See the Pen wubJp by anon (@anon) on CodePen

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Hi and welcome to the GreenSock forums,

 

Thanks a lot for CodePen demo, it really helps.

 

What you will need to do is use TimelineMax's tweenTo() method.

Take a look here

 

http://codepen.io/GreenSock/pen/Fejwn?editors=101

 

You will notice that instead of using tl.add(TweenLite.to()) I used TimelineMax's .to() method to make the code shorter.

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I think I've worked this out. Basically I need to use TimelineMax.tweenTo

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Also, you will notice that each of your tweens is using the default Power1.easeOut ease. So if you tween from label "two" to label "four", you will see the box speed up and slow down. One technique is to put Linear eases on all your tweens and then add a custom ease when you use tweenTo().

 

I also took the liberty in this example to simplify your code for your buttons using a little jQuery trick. Basically we just look inside each button for the text and then pass that in as the label for tweenTo()

 

var tl = new TimelineMax();


//add a tween that starts at "myLabel"
tl.to(element, 1, {x:100, ease:Linear.easeNone}, "one")
  .to(element, 1, {x:200, ease:Linear.easeNone}, "two")
  .to(element, 1, {x:300, ease:Linear.easeNone}, "three")
  .to(element, 1, {x:400, ease:Linear.easeNone}, "four")
  .to(element, 1, {x:500, ease:Linear.easeNone}, "five");


$(".navBtn").click(function() {
  var myText = $(this).find(".navText").text();
  tl.tweenTo(myText, {ease:Power1.easeOut})
})
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Great example of tweenTo() Carl, very helpful! :)

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Wow, excellent responses guys. I'm joining the Greensock club!

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  • 10 months later...

In case anyone came across this forum post with a particular use case like mine (e.g. seeking to a label time with sped-up playback), I used a TweenMax.to() call instead of TimelineMax.tweenTo():

function quickSeekToTimeLabel( timeline, label, duration ) {
  TweenMax.to( timeline, duration || 0.2, {time: timeline.getLabelTime(label)});
}
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