Editing NASA WorldWind (section)

==Add-ons and plugins==
WorldWind can be expanded by using one of many add-ons - small extensions that add new functionality to the program.<br>
Possible types of add-ons:
* Point layers: simple [[XML]] files displaying placemarks (point of interest) as icons
* Trail layers: paths (routes, boundaries)
* Line features: XML with a list of points visualized as a line or wall
* Polygon features: XML with a list of points visualized as a filled [[polygon]] (flat or [[extrusion|extruded]])
* Model features: XML used to load 3D textured meshes
* Place names: specific points (such as cities, hills and buildings) that are assigned text labels
* Image layers: high resolution imagery for various places in the world
* Scripts: files that control camera movement
Plugins are small programs written in [[C Sharp (programming language)|C#]], [[Visual Basic|VB]] or [[J Sharp|J#]] which are loaded and compiled by WorldWind at startup. Plug-in developers can add features to WorldWind without changing the program's source code.