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FlightGear Newsletter May 2013: Difference between revisions
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→Development news: http://www.mail-archive.com/flightgear-devel@lists.sourceforge.net/msg40005.html
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== Development news == | == Development news == | ||
Note to all contributors: Please also copy your newsletter additions to the changelog for the upcoming release: [[Next Changelog]]. | Note to all contributors: Please also copy your newsletter additions to the changelog for the upcoming release: [[Next Changelog]]. | ||
=== Aircraft Checklists === | |||
Stuart has pushed a further enhancement to the checklist feature. Aircraft authors may now add one or more <binding> elements to a checklist | |||
<item>. Conceptually, these are the actions that the user should execute to complete the item. The checklist GUI displays items with such <binding> | |||
elements with an additional [>] button. Clicking on the button executes the bindings, allowing the user to watch as the | |||
computer/co-pilot/instructor executes the checklist item. | |||
The <binding> element is exactly as you would expect - so property-assign, nasal etc. works. | |||
Due to the power of Nasal and properties, this feature only required 13 lines of code to write, most of which is displaying the button! | |||
Stuart is planning to extend this function so that checklists with one or more items containing a <binding> element can have an (optional) button | |||
to execute the entire checklist. I'm still thinking of how best to implement this, as I think one would want a gap between each item. | |||
Stuart highlights the property-interpolate command which provides a very convenient way to interpolate a property to a new value. See | |||
Docs/README.commands if you were unaware of this. | |||
Stuart has updated the c172p checklists to use this feature, including some rather cute interpolations of the throttle, mixture and trim controls. | |||
=== Random Buildings === | === Random Buildings === | ||