BlendedBlobs2D is a basic C# demo of real-time 2D implicit isocontour visualization. A set of 2D point primitives (ie "blobs") can be created and manipulated. A "marching quads" algorithm is used to convert the blended blobs into polylines.

Questions can be directed to rms@unknownroad.com, but I can't guarantee you will get a timely response...

Screenshot:

UI controls:

right mouse - add blob at click
left mouse - move blob center underneath cursor
wheel - change IsoValue setting