[Andrei Popa]

I think I understand what you want now. Here is a script that puts keyframes at the start and end of each marker of the selected layer. Select the layer than run this small script.

var selLayer = app.project.activeItem.selectedLayers[0];
var prop = selLayer ('ADBE Transform Group') ('ADBE Opacity');
var markers = selLayer ('Marker');
for (var i = 1; i <= markers.numKeys; i++) {
  prop.setValueAtTime (markers.keyTime (i), 0);
  prop.setValueAtTime (markers.keyTime (i) + markers.keyValue (i).duration, 100);
}

I thought that you wanted this to be responsive aka change when you modify the markers.

[Andrei Popa]

This is an expression. Will work after you put the markers. Alt+click the stop-watch of the desired property of your layer and write there this code(if it’s something 2d, like size, you need to modify it a bit to work).

[Andrei Popa]

This will make your text go from 0 to 100 for the duration of each marker on the layer.

n = 0;
if (marker.numKeys > 0) {
  n = marker.nearestKey (time).index;
  if (marker.key (n).time > time) {
    n--;
  }
}
if (n > 0) {
  t = marker.key (n).time;
  dur = marker.key (n).duration;
  linear (time, t, t + dur, 0, 100);
} else {
  value;
}

[Andrei Popa]

I think what you need is valueAtTime(). To link the scale of layer A you can use

thisComp.layer("A").scale.valueAtTime(time-inPoint);

To be a little modular, so it works even if the inPoint of A is not 0, you could write it like this

layerA = thisComp.layer("A");
inA = layerA.inPoint;
diff = inPoint-inA;
layerA.scale.valueAtTime(time-diff);

[Andrei Popa]

I am not sure what you want your if/else statement to do…

[Andrei Popa]

Hi Trent. Thank you for the help. But unfortunately this won’t work for me either. I have a paragraph layer and the lines are automatically cut(boxText layer). More than this, the source of the text is taken from an external json file that is automatically created. So I have no control over the newline character. Also, I can only roughly assume the number of lines since the text would be different every time. And I cannot split it in smaller texts since the break from the paragraph text does not create any kind of breaking char so I could split() it.

My idea was to create an animator for lines which makes the lines visible one by one, instantly(with a selector based on index and with an expression on start and end that go from zero to number of lines). Then, over this, somehow create a character animator that goes from 100 to 0, but only on the visible line. I thought that this was possible by adding an expression selector or something similar but I am lost from here…

Here is an aep file if you want to better understand how I made the lines. If you modify the paragraph and make it thinner, thus more lines, the animator still works.

https://www.dropbox.com/s/ise06dx2ogmfdh0/arab-animator.aep?dl=0

[Andrei Popa]

Thank you for the fast response Trent. But this is not what I want.

I want the text to appear from right to left on each line and from top to bottom. I am working with some Arabic text and I want it to appear in the order in which it should be read.

[Andrei Popa]

Hi Tomas. As far as you know, is it possible to modify just a part of a paragraph via expressions using style?

[Andrei Popa]

I think it would be like this:

mySlider = effects(“Slider”); //This is where you pickwhip the value

mySlider*-100

[Andrei Popa]

I cant see the picture.

Do you want an expression that moves a solid from the right edge of a text to a value that you assign as stop value?