efield - Pure HTML5 Electric Field Visualizations
Note that the efield toolkit has been replaced by the more general and better organized vfield
The efield toolkit allows authors and other content creators to quickly build easy to understand visualizations of electric fields. Simply specify the position and type of electric charge, and in some cases the starting points of the electric fields, and the library generates a three dimensional interactive model on the web page using WebGL.
For full details, visit the efield web site. For finished examples, visit the [visualization catalog] (http://vizit.github.io/catalog/).