Canvas ND framework: Difference between revisions

The '''navigation display''' ('''ND''') is a display in a glass cockpit, providing information about an aircraft's lateral situation. As of late 2013, a new ND ([[Navigation display]] being the old) is in development for [[FlightGear]] using the new [[MapStructure]] back-end for charting purposes, and SVG symbols animated via Nasal functions for any non-mapping aspects (typically using listeners and timers). Thanks to [[Canvas]], much more complex and sophisticated graphics are possible now, without having to know any C++, and without having to rebuild FlightGear from source. Anybody able to run FlightGear and a text editor, can now easily use and extend the ND framework.  

Extending the framework should normally require very little in terms of coding - typically, people can simply take an existing feature/symbol, copy & paste the code section and customize it according to their needs (e.g. different SVG element id, different animations, different properties) - symbols can be easily changed by providing a separate SVG file, or by creating a new one via Inkscape.