Vector path offset

Question

I'm trying to make a vector path and it is constantly being offset by a factor of 4.17.  For example, if I make a line from point 100,100 to 200,200, it acutally makes the line from 417,417 to 834, 834.
I'm guessing this has something to do with the image resolution being 300 dpi versus 72 dpi, because 300/72 = 416.6.  However, I have no idea how to communicate to photoshop to actually make the line at 100,100 to 200,200.
Any ideas? Here's some example code I took from the scripting guide that shows what I'm doing:
function drawLine(doc, start, stop) {
var startPoint = new PathPointInfo();
startPoint.anchor = start;
startPoint.leftDirection = start;
startPoint.rightDirection = start;
startPoint.kind = PointKind.CORNERPOINT;
var stopPoint = new PathPointInfo();
stopPoint.anchor = stop;
stopPoint.leftDirection = stop;
stopPoint.rightDirection = stop;
stopPoint.kind = PointKind.CORNERPOINT;
var spi = new SubPathInfo();
spi.closed = false;
spi.operation = ShapeOperation.SHAPEXOR;
spi.entireSubPath = [startPoint, stopPoint];
var line = doc.pathItems.add("Line", [spi]);
line.strokePath(ToolType.PENCIL);
line.remove();
drawLine(app.activeDocument, [100,100], [200,200]);
thanks!!

Answer 1

function drawLine(doc, start, stop) {
var startPoint = new PathPointInfo();
startPoint.anchor = start;
startPoint.leftDirection = start;
startPoint.rightDirection = start;
startPoint.kind = PointKind.CORNERPOINT;
var stopPoint = new PathPointInfo();
stopPoint.anchor = stop;
stopPoint.leftDirection = stop;
stopPoint.rightDirection = stop;
stopPoint.kind = PointKind.CORNERPOINT;
var spi = new SubPathInfo();
spi.closed = false;
spi.operation = ShapeOperation.SHAPEXOR;
spi.entireSubPath = [startPoint, stopPoint];
var line = doc.pathItems.add("Line", [spi]);
line.strokePath(ToolType.PENCIL);
line.remove();
var orig_ruler_units = app.preferences.rulerUnits;
var res = app.activeDocument.resolution;
app.preferences.rulerUnits = Units.PIXELS; // Set the ruler units to PIXELS
app.activeDocument.resizeImage(app.activeDocument.width.value,app.activeDocument.height.value,72);
drawLine(app.activeDocument, [100,100], [200,200]);
app.preferences.rulerUnits = orig_ruler_units; // Reset units to original settings
app.activeDocument.resizeImage(app.activeDocument.width.value,app.activeDocument.height.value,res);