[Andrei Popa]

You can try this.
I used linear for the value because if I directly inserted the value, tracking would be set correctly but the text would not change.
Basically, what I did is measure the text at -1 time(outside comp, before tracking), and set tracking to change from 0 to the calculated value in the frame before zero.
For calculating the value, I divided the difference between actual size and desired size by the number of letters-1. Also, if the text is larger, the tracking stays at zero. If you want to change this, change last line to linear(time, 0 – thisComp.frameDuration, 0, 0, diff / numLetters)


actualWidth = sourceRectAtTime(-1, false).width;
desiredWidh = 250;
diff = desiredWidh - actualWidth;
numLetters = text.sourceText.value.split("").length;
diff > 0 ? linear(time, 0 - thisComp.frameDuration, 0, 0, diff / numLetters) : 0;


Andrei
My Envato portfolio.

[Andrei Popa]

Also, I have not checked this with a csv file but with some values I manually inserted. You may have to change some stuff to correctly take the values from the csv file.

Andrei
My Envato portfolio.

[Andrei Popa]

I am a little confused. You said you have km as stops but you used x position and y position.

However, if you want a straight line, like a loading bar, and your train to move on that, you can use this on x position.

sPos is what you want your start value to be. I chose 100 away from the edge of my comp. Same for ePos(just end).
minValue and maxValue are the minimum and maximum kilometer you provided here. You can change this to whatever you want also. They should be the maximum and minimum value of the column you take your data from.


var sPos = 100; //start position value.
var ePos = 1820; //end position value
var minValue = 105769; //min from table
var maxValue = 120458; //max from table
myData = thisComp.layer("PositionXPositionY.csv")("Data")("Outline");
i = 1;
while (myData("Times")("Times " + i).value < time && i < myData("Times").numProperties - 1) i++;

initTime = myData("Times")("Times " + (i - 1)).value;
endTime = myData("Times")("Times " + i).value;
initRawPosition = eval(myData("PositionX")("PositionX " + (i - 1)).value);
endRawPosition = eval(myData("PositionX")("PositionX " + i).value);
initPosition = linear(initRawPosition,minValue, maxValue,sPos,ePos);
endPosition = linear(endRawPosition,minValue,maxValue,sPos,ePos);

linear(time, initTime, endTime, initPosition, endPosition);


Similar to this technique, you can also turn it into percentage for trim paths. If you take this expression, and modify sPos and ePos to 0 and 100, and put it on a trim paths end property, you will have a line that fills according to the data from your table.

Andrei
My Envato portfolio.

[Andrei Popa]

I need more data to answer you.
What kind of data you have in your CSV? This expression works on position with the data being coordinates for those positions.

Andrei
My Envato portfolio.

[Andrei Popa]

I suppose what you try to do is modify the scale/rotation of a lot of layers by the same amount. If yes, you need to put those 2 values in an expression controller. If the scale has always same height/width values or has separated dimensions, you could use 2 sliders. So put 2 sliders on a control layer. Use this expression for scale

valueToAdd = //pickwhip the slider one here;
value+[valueToAdd,valueToAdd]

And this for rotation

value+//pickwhip the slider two here

Just replace “//” and everything after with your pick-whip generated code, so final expression for scale should look something like this. The same for rotation.

valueToAdd = thisComp.layer("Control layer").effect("Scale control")("Slider");
value+[valueToAdd,valueToAdd]

Andrei
My Envato portfolio.

[Andrei Popa]

You should add a slider control to your layer and pick whip that value.

Andrei
My Envato portfolio.

[Andrei Popa]

I don’t understand this behavior.
Can you attach one or two photos?

Andrei
My Envato portfolio.

[Andrei Popa]

Here is an expression for bottom left anchor point

var left = sourceRectAtTime(time,false).left;
var myHeight = sourceRectAtTime(time,false).height;
var top = sourceRectAtTime(time,false).top;
[left,myHeight+top]

Andrei
My Envato portfolio.

[Andrei Popa]

I just think you need to insert a (“Slider”) before value.

time-(thisComp.layer("expressionControl").effect("variableSlider")("Slider").value)*thisComp.frameDuration)

However, I would do it like this, to be easier to read:

diff = thisComp.layer("expressionControl").effect("variableSlider")("Slider").value;
time-diff*thisComp.frameDuration;

Andrei
My Envato portfolio.

[Andrei Popa]

Download a cracked version of cc2017 from some torrent and test it there. That is how i do it. I am not sure there is an alternative.
You could also check the changelogs of after effects to see whats new in mogrt(2018 and later), so you don’t use those features.

Andrei
My Envato portfolio.