How to retrieve "KeyValue" from multiple Shape paths then "SetValue" to Mask path Keyframes?

Question

Hello AEScriptsComm.,..
i have one question (hopefully the tutorer will answer soon), which is the goal and reason i'm learning ExtendScripts:
I have a few dozen Adobe Illustrator, imported Shape Layers with paths "Created..from Vector Layers" in AEffects.
In order to use a .jsxbin script to change every path to the same number of verticies for animating, i must 1st convert them to Keyframes on the same Mask Path property.
1) i hoped to please be shown\sent an example showing how to,..
a) Get\Retrieve "KeyValue" from multiple, single (Shape Layers):Outlines > Contents > Group > Path > Path as shown in screenshot "4-CreateShapeFromVecLyr2Outlines.JPG",
and then,..
b) "SetValue" from those paths into Mask > Mask Path keyframes also in screenshot "1-ExtendScript_ShapePathsTOMaskPathKeyframes.JPG"?
Really appreciate any help soon as time allows,
Jeff

Answer 1

Hello Xavier,
                   esp. with my limited experience i can't determine how your concise script works.
Because it 1st errors  esp. with undefines  i'm thinking at best its incomplete (or algorithm) to give me the gist and i'm to fill in the blanks, which i am doing with the sort of working code example pasted below.
Its written with every  definition, declaration and initialization completed, so a novice like me can read the manuals, rev. eng. pertinant script(s), then with fragmented code and understanding quickly connecting to form a complete custom script, as we've all done.
like this:
var comp = app.project.activeItem:
var layer  = comp.layers.addSolid([1,1,1,], layerName, comp.width, comp.height, 1.0, comp,duration);
therefore,..
var CompLayerSolid = app.project.activeItem.layers.addSolid([1,1,1,], layerName, comp.width, comp.height, 1.0, comp,duration);
..then with such direct access in other essentials, i can substitute compatible properties, methods,  parameters etc. and remaining code that affect the layer objects i need to control simultaneously. Also thereby learning more complex code quickly enough to use.
Only, i hoped to save time here by those already familiar.
  But by comparison your script without declarations or many references in AE's CS6 Scripting Guide and online, i can't decipher or understand,
although you wrote this more complete segment at CCow:
"shapeLayer.content.addProperty("ADBE Vector Graphic - Fill");",
..in which is the addProperty i 1st looked for in your script after erroring with "ShapeLayer is undefined"
But i could'nt find a ref. to either .content or content. anywhere in ExtendScript, nor "targetLayer.mask", and "targetLayer" i found once in ref. to ExtendScript as an AE layer name. So perhaps their your variables?, you see i can't determine or use.
i don't know that was'nt meant, maybe a bit to tell me do my own research?,  no offence, can't confirm that without reply, hope you will, but my research is why i'm here and your probably advanced script could only help with your assistance.
Thanks anyway,
Cheers.
function()
var comp = app.project.activeItem;
var masksLayer = comp.selectedLayers[0];
var masksGroup = masksLayer.property("ADBE Mask Parade");
app.beginUndoGroup(rd_MasksToShapesData.scriptName);
// Create an empty shape lay
// Get the mask layer's pixel aspect; if layer has no source, use comp's pixel aspect
var pixelAspect = (masksLayer.source != null) ? masksLayer.source.pixelAspect : 1.0; //copixelAspect;
// Iterate over the masks layer's masks, converting their paths to shape paths
var mask, maskPath, vertices;
for (var m=1; m<=masksGroup.numProperties; m++)
var suffix = " Shapes";
var shapeLayer = comp.layers.addShape();
shapeLayer.name = masksLayer.name.substr(0,31-suffix.length) + suffix;
shapeLayer.moveBefore(masksLayer);
var shapeLayerContents = shapeLayer.property("ADBE Root Vectors Group");
var shapeGroup = shapeLayerContents; //.addProperty("ADBE Vector Group");
//shapeGroup.name = "Masks";
var shapePathGroup, shapePath, shapePathData;
// Get mask info
mask = masksGroup.property(m);
maskPath = mask.property("ADBE Mask Shape");
// Create new shape path using mask info
shapePathGroup = shapeGroup.addProperty("ADBE Vector Shape - Group");
shapePathGroup.name = mask.name;
shapePath = shapePathGroup.property("ADBE Vector Shape");
shapePathData = new Shape();
// ...adjust mask vertices (x axis) by pixel aspect
vertices = new Array();
for (var v=0; v<maskPath.value.vertices.length; v++){
vertices[vertices.length] = [maskPath.value.vertices[v][0] * pixelAspect, maskPath.value.vertices[v][1]];
shapePathData.vertices = vertices;
shapePathData.inTangents = maskPath.value.inTangents;
shapePathData.outTangents = maskPath.value.outTangents;
shapePathData.closed = maskPath.value.closed;
shapePath.setValue(shapePathData);
shapeLayer.transform.anchorPoint.setValue(masksLayer.transform.anchorPoint.value);
shapeLayer.transform.position.setValue(masksLayer.transform.position.value);
shapeLayer.transform.scale.setValue(masksLayer.transform.scale.value);
if (masksLayer.threeDLayer)
shapeLayer.threeDLayer = true;
shapeLayer.transform.xRotation.setValue(masksLayer.transform.xRotation.value);
shapeLayer.transform.yRotation.setValue(masksLayer.transform.yRotation.value);
shapeLayer.transform.zRotation.setValue(masksLayer.transform.zRotation.value);
shapeLayer.transform.orientation.setValue(masksLayer.transform.orientation.value);
else
shapeLayer.transform.rotation.setValue(masksLayer.transform.rotation.value);
shapeLayer.transform.opacity.setValue(masksLayer.transform.opacity.value);
// Match the mask layer's transfor
// Mute the mask layer
masksLayer.enabled = false;
app.endUndoGroup();