The Editor.TraceBoundary method creates a Polyline boundary from a picked point with the option to specify if it should do island detection. What is missing is the ability to specify the set of objects used to find the boundary; it uses all of the visible objects.
Short of doing something kludgy, like putting the objects on a temporary layer and isolate it, is there another method of getting a polygon boundary?
I know in the past, LE had created GbPoly, which seems to no longer be available. Is there any libraries that are similar?
If I wanted to roll my own formula for doing this, what sort of mathematics would I use? Does anyone have any links that can guide me in the right direction? I have searched extensively for terms like "Polygon Boundary Detection" and "Boundary Tracing" but all I can find are algorithms for raster image edge detection. What is the proper name of the algorithm for doing this?
Luis, any help here?