Photoshop paths to linear - photoshop

Question

I wonder if it's possible to loop over a Photoshop path and set all the points on it to be linear?
Unlike Illustrator, paths in Photoshop is not well documented and a bit cumbersome:
// Switch off any dialog boxes
displayDialogs = DialogModes.ERROR // ERRORS ONLY DialogModes 2
// create a document to work with
var docRef = app.documents.add(200, 200, 72, "untitled");
// call the source document
var srcDoc = app.activeDocument;
// create the array of PathPointInfo objects
var lineArray = new Array();
lineArray.push(new PathPointInfo());
lineArray[0].kind = PointKind.SMOOTHPOINT;
lineArray[0].anchor = new Array(50, 100); // A
lineArray[0].leftDirection = [0, 0];
lineArray[0].rightDirection = lineArray[0].anchor;
lineArray.push(new PathPointInfo());
lineArray[1].kind = PointKind.SMOOTHPOINT;
lineArray[1].anchor = new Array(150, 150); // B
lineArray[1].leftDirection = [0, 0];
lineArray[1].rightDirection = [0, 0];
// create a SubPathInfo object, which holds the line array in its entireSubPath property.
var lineSubPathArray = new Array();
lineSubPathArray.push(new SubPathInfo());
lineSubPathArray[0].operation = ShapeOperation.SHAPEXOR;
lineSubPathArray[0].closed = false;
lineSubPathArray[0].entireSubPath = lineArray;
pathName = "my path";
//create the path item, passing subpath to add method
var myPathItem = docRef.pathItems.add(pathName, lineSubPathArray);
// Set Display Dialogs back to normal
displayDialogs = DialogModes.ALL; // NORMAL
myPath = srcDoc.pathItems.getByName(pathName);
var subPathCount = myPath.subPathItems.length; // Count of subpaths
var msg = "";
msg += subPathCount + " path(s)\n";
for (var i = 0; i < myPath.subPathItems.length; i++)
{
msg += myPath.subPathItems[i] + "\n";
}
alert(msg);
Firstly, I'm having difficulty access the subPathItems items after I created the path.
Secondly, I don't know what the settings for the tangents (.leftDirection, .rightDirection) are for a linear path.
Apart from that it's peachy ;)