change the X position of null layer incrementally every time user press a left or right button

[Dan Ebberts]

So the arrow buttons are in a script dialog, is that correct? If so, you just need to set up an onClick handler for each button that reads the current position value of the null, adds/subtracts 10 from the x component and saves the new value.

Or, you could add an expression to the null that calculates its position by using sourceRectAtTime() to measure the actual size of the text.

Dan

[Fabio Apelbaum]

Thank you Dan! Yes, it is on a script I have been creating in ExtendScript. To that specific part this is what I have written so far… Im not really sure how to tell the null to add/substract and save the new value.

Tried looking in the Scripting guide but couldnt find it. Can you please lead me in the right direction?

Thank you again!

Fabio

var proj = app.project;
var selectAP = proj.item(7);
var layerPosition= selectAP.layer('Text_Position');
var textPosition = layerPosition.property("Position");
var cbList = new Array();

//GROUP 2 PANEL

var groupTwo = myWin.add("panel", undefined, "Please, select the time and day:");
groupTwo.orientation = "row";

// ARROWS ON UI
var leftArrow = groupTwo.add("iconbutton", undefined, "/Applications/Adobe After Effects CC 2014/Scripts/RedSox_Script/Images/left.png","LeftArrow");
var rightArrow = groupTwo.add("iconbutton", undefined, "/Applications/Adobe After Effects CC 2014/Scripts/RedSox_Script/Images/right.png","RightArrow");

//LEFT ARROW TO CHANGE DAY/TIME TO CENTER

leftArrow.onClick = function(){

layerPosition.property("Transform").property("Position").setValue([0,0,0]);

};

//RIGHT ARROW TO CHANGE DAY/TIME TO CENTER

rightArrow.onClick = function(){

layerPosition.property("Transform").property("Position").setValue([0,0,0]);

};

[Dan Ebberts]

I haven’t test anything, but it should looks something like this:

var oldVal = layerPosition.property(“Position”).value;
layerPosition.property(“Position”).setValue([oldVal[0]+10,oldVal[1],oldVal[2]]);

Dan

[Fabio Apelbaum]

Wow!!! works like a charm! thank you so much! Dan, let me ask you if you dont mind. I would never guessed to put a 1 for y and a 2 for z. How can I learn more about those details? I couldnt find it in the scripting guide from Adobe.

Thanks so much for all! owe you big time!

[Dan Ebberts]

Multidimensional property values are stored in JavaScript arrays. So x,y,z correspond to indexes 0,1,2. For colors, r,g,b,a correspond to indexes 0,1,2,3. There’s a section of Arrays and multidimensional properties in the Expression Basics section of AE Help:

https://helpx.adobe.com/after-effects/using/expression-basics.html#expression_basics

Dan