set minimum fps force tweends into slow motion 30 fps?

[sagispin]

Hi, i want to set minimum fps
on weak devices fps might be lower then 30 fps
if this happends i want the delta time to me smaller than the real delta time
i need help figuring this out

[OSUblake]

Are you trying to get a delta time of 0.5, or do you want it to be based on the elapsed time?

 

Here's a simple example of a ticker, which could be adapted to work with GSAP's ticker.

 

var targetFPMS = 60 / 1000;
var maxElapsedMS = 100;
var lastTime = -1;
var elapsedMS = -1;
var deltaTime = 1;
var speed = 1;

requestAnimationFrame(onFrame);

function onFrame(currentTime) {
  
  elapsedMS = currentTime - lastTime;
  
  deltaTime = elapsedMS * targetFPMS * speed;
  
  if (elapsedMS > maxElapsedMS) {
    elapsedMS = maxElapsedMS;
  }
  
  // Do your delta time stuff
    
  lastTime = currentTime;
  
  requestAnimationFrame(onFrame);
}

 

[sagispin]

@OSUblake
lets say i run a tween that takes a {x:0} to {x:10} in duration 1 second

each tick the tween moves 10 * dt pixels

lets say that dt is now 1/20 in that case it needs to move
10 * 1/30 pixels
and not
10 * 1/20

because i set the limited fps to 30

dt = max(dt,1/30)
am i change this stuff witought going inside the js files of gsap?
 

[sagispin]

Just now, sagispin said:

@OSUblake
lets say i run a tween that takes a {x:0} to {x:10} in duration 1 second

each tick the tween moves 10 * dt pixels

lets say that dt is now 1/20 in that case it needs to move
10 * 1/30 pixels
and not
10 * 1/20

because i set the limited fps to 30

dt = max(dt,1/30)
am i able to change this stuff witought going inside the js files of gsap?
 

 

[GreenSock]

I wonder if perhaps you're looking for GSAP's lagSmoothing() feature? 

https://greensock.com/docs/TweenLite/static.lagSmoothing()

[OSUblake]

OK. I understand what you want now. I think you might be able to do that with the lagSmoothing feature.

https://greensock.com/docs/TweenLite/static.lagSmoothing()

 

And I just saw your deleted post about manually stepping the ticker. @GreenSock that's actually a feature a lot of game developers want. They want their game loop to drive everything. Something worth considering for GSAP v2.

[sagispin]

@OSUblake

Thank you this might be what i need