After Effects Scripting

[aa2299007]

Good afternoon.

I want to link the z position of the layer to the Slider Control, which is assigned as an effect for this layer.

var myCarrentComp = app.project.activeItem;
var varCamPosZ = myCarrentComp.layer(1).transform.position.value[2];
myCarrentComp.layer(1).Effects.addProperty("Slider Control");
var PosZCode = "effect(\"Slider Control\")(\"Slider\");";
myCarrentComp.layer(i).transform.position.value[2].expression =PosZCode;

I thought the Slider Control effect would be related to the z position of the layer.
But this is not happening. Is there anyone who can help with this issue ???

Is there a command to separate the position of a layer of type Separate Dimensions???

[Tomas Sinkunas]

Few things wrong in your code:

• 1. myCarrentComp.layer(i).transform.position.value[2].expression =PosZCode;
  • i is undefined;
  • you are applying PosZCode expression to a value - this is wrong. You can only apply the expression to a property, not a value. Basically, you should do this: <...>transform.position.expression = PosZCode;
• Your expression string is wrong - it should handle both 2D and 3D layers:

• if (value.length !== 3) {
  	[value[0], value[1]];
  } else {
  	[value[0], value[1], effect("Slider Control")("Slider")];
  }

Final code could look like this:

(function() {
	var composition = app.project.activeItem;
	if (!composition || !(composition instanceof CompItem)) {
		return alert('Please select composition first');
	}

	var layer = composition.selectedLayers[0];
	if (!layer) {
		return alert('Please select a layer');
	}

	var slider = layer.property('ADBE Effect Parade').addProperty('ADBE Slider Control');
	var expression = 'if (value.length !== 3) {\r' + 
		'\t[value[0], value[1]];\r' +
		'} else {\r' + 
		'\t[value[0], value[1], effect("' + slider.name + '")("ADBE Slider Control-0001")];\r' +
		'}';
	layer.transform.position.expression = expression;
})();