Get Current Selected RoundRect Corner Radius

Question

Alright, been working on this stuff for hourssss now, so I felt that after this much searching and messing about it would be worth it to ask this question.
So I have a rounded rectangle vector mask path here:
http://cl.ly/1M2E0C1X0V1y2w430x0q
Is there any way at all to get the corner radius of that rounded rectangle which is (40) and then assign that to a variable? If there isn't an easy way to do it, the next best guess would be to take the first pathitem distance from the top and subtract the 8th pathitem distance from top of canvas from that essentially getting the border radius just from the change in distance between those two points from the top of the canvas. I have an example shown below:
http://cl.ly/2L280K0O0s0J3I3A3h2O
This code gets the x,y values of all points in the document, can I limit it to just the points on that layer vector mask? And then subtract one from the other and assign that to a variable?
#target photoshop
var doc = app.activeDocument;
var ppList = doc.pathItems[0].subPathItems[0].pathPoints;
for ( var i =0; i < ppList.length; i++ )
      $.write('Path Point '+i)
      $.writeln(' X:'+ppList[i].anchor[0]+' Y:'+ppList[i].anchor[1])

Answer 1

Then it should not be hard to identify the PathPoints that for the straight parts and then evaluate the coordinates.
What’s giving you problems?