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O
oliverh39700684
Participating Frequently
March 4, 2024
Answered

Changing x position of last keyframe using a slider for template

  • March 4, 2024
  • 1 reply
  • 536 views

I've searched for an expression that will use a slider to change the x position on the last keyframe but can only seem to get it work on adjusting the first keyframes x position instead. 

Any help as to what I need to amend in the expression to get it work would be great. 


This topic has been closed for replies.
Correct answer Airweb_AE
firstValue = key(1).value[0];
sliderValue = effect("Slider Control")(1);

   x = linear(time, key(1).time, key(numKeys).time, firstValue, sliderValue);
// x = ease(time, key(1).time, key(numKeys).time, firstValue, sliderValue);
// x = easeIn(time, key(1).time, key(numKeys).time, firstValue, sliderValue);
// x = easeOut(time, key(1).time, key(numKeys).time, firstValue, sliderValue);
[x, value[1]]

In your screenshot you're not using a linear interpolation so you may need to use an ease() instead of linear()

1 reply

Mylenium
Mylenium
Legend
March 4, 2024

Your code makes no sense. The driver in a linear() function is time or another slider's input, not the property base value itself. Simply fix the function and it will work.

 

Mylenium

O
oliverh39700684Author
Participating Frequently
March 4, 2024

Hi Mylenium, 

If you could help me with what is correct that would be great. 

Thanks

A
Airweb_AECorrect answer
Legend
March 5, 2024
firstValue = key(1).value[0];
sliderValue = effect("Slider Control")(1);

   x = linear(time, key(1).time, key(numKeys).time, firstValue, sliderValue);
// x = ease(time, key(1).time, key(numKeys).time, firstValue, sliderValue);
// x = easeIn(time, key(1).time, key(numKeys).time, firstValue, sliderValue);
// x = easeOut(time, key(1).time, key(numKeys).time, firstValue, sliderValue);
[x, value[1]]

In your screenshot you're not using a linear interpolation so you may need to use an ease() instead of linear()

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