Get vertices and tangents info for a selected layer's first mask in AE

gistfile1.txt

//get all first mas vertices info
//Nik Ska, 2014
//CC-BY


var maskVertex = function(v, inT, outT){
    this.vertex = v;
    this.inTangent = inT;
    this.outTangent = outT;
    
    this.showInfo = function(){
        $.writeln("\nCoordinate: ", this.vertex);
        $.writeln("\tinTangent: ", this.inTangent);
        $.writeln("\toutTangent: ", this.outTangent);
    }
}

getVertices = function(layer){
	var tmp = layer.property("ADBE Mask Parade").property("ADBE Mask Atom").property("ADBE Mask Shape").value;
	var mask = [];
	if(tmp){
		for(var v = 0; v < tmp.vertices.length; v++){
			mask.push(new maskVertex(tmp.vertices[v], tmp.inTangents[v], tmp.outTangents[v]));
		}
		return mask
	}
	return null;
}

var activeComp = app.project.activeItem;
if(activeComp && activeComp instanceof CompItem){
	var sel = activeComp.selectedLayers;
	if(sel && sel.length > 0){
		var mask = getVertices(sel[0]);
		for(var m = 0; m < mask.length; m++){
			mask[m].showInfo();
		}
	}
}