slow intersect call

[pbeeson]

Pertaining to point 3 from above posting.

Notice that in the left image, some of the rays cast from the "robot" I have in Vizard (shown as a rectangle) go through the wall (white line in grey space). I believe this is a bug in viz.phys.intersectLine()

When I use viz.intersect() instead of viz.phys.intersectLine(), all rays properly intersect the wall (right image).

(These details don't show up well in the thumbnails, but do in the fuill size images.