Looking for a way to test if the lines in a path intersect any objects?

Question

What i'd like to do is select an open ended path, and generate an array of all the objects that path intersects.  Here's an image to illustrate:
The green line would be selected.  The script would run and populate an array with pointers to each yellow square the line intersects.  Does anyone have any ideas on how this can be done in javascript?  Or if it is possible at all?  Help is appreacited, thanks!

Answer 1

Sure it's possible. If all of your objects-to-cross are rectangles (as in your image), it's even quite trivial.
(15 minutes later) Oh well, perhaps not "trivial" -- I'd have to check at home whether or not I got a full-fledged rectangle intersection code. This doesn't work -- the "crossObject" function needs a bit more work.
At least it'll give you something to look at.
if (app.selection.length != 1)
alert ("Wot no single path selected?");
else
if (!(app.selection[0] instanceof PathItem))
  alert ("Wot no path?");
else
  allObjects = [];
  for (i=0; i<app.activeDocument.pageItems.length; i++)
   if (!app.activeDocument.pageItems[i].selected)
    allObjects.push (app.activeDocument.pageItems[i]);
  thePath = [];
  for (i=0; i<app.selection[0].pathPoints.length; i++)
   thePath.push ([ app.selection[0].pathPoints[i].anchor[0],app.selection[0].pathPoints[i].anchor[1] ] );
  app.selection[0].selected = false;
  for (i=0; i<thePath.length-1; i++)
   for (j=0; j<allObjects.length; j++)
   // only check if necessary
    if (allObjects[j].selected == true)
     continue;
    if (crossObject (thePath[i], thePath[i+1], allObjects[j]))
     allObjects[j].selected = true;
// .. to do .. (dis doesn't work)
// (check Liang-Barsky or Cohen-Sutherland viewport clipping)
function crossObject (a, b, obj)
var xl = obj.visibleBounds[1];
var xr = obj.visibleBounds[3];
var yt = obj.visibleBounds[0];
var yb = obj.visibleBounds[2];
var x1 = a[0],y1 = a[1];
var x2 = b[0],y2 = b[1];
// if point is inside object, it (obviously) hits
if (x1 > xl && x1 < xr && y1 > yt && y1 < yb)
  return true;
if (x2 > xl && x2 < xr && y2 > yt && y2 < yb)
  return true;
return false;