I have a polyline draped over a DEM. I have a set of vertices for the draped line. I have a set of sight lines from the start of the polyline to every vertex on the draped line. I want to intersect the sight lines with the draped line and get back a set of nodes representing the intersection. I want an attribute on each sight line identifying whether it cuts the draped line en route to the node (not visible) or if it goes straight to the node (visible). In the image below the red line is the draped line and the brown lines are the lines of sight to each vertex.
The example from the FME Evangelist (http://blog.safe.com/2011/06/fmeevangelist81/) demonstrated the creation of the profile and then I added in a NeighbourFinder and ListExploder to generate the sight lines. My workbench and I are struggling with what's in 3D and what's in 2D here.
Thanks in advance!