![]() To set the property "/sim/my/aircraft/properties/crashed" to false. ![]() ThisAircraft = "/sim/my/aircraft/properties" In the script for the common case where you are acting on a variable This avoids the need for extensive string concatenation These areĬoncatenated together to form a property tree path internally within Is that they both accept variable numbers of arguments. Props.Node interface (see below) provides the ability to set explicitĪ useful feature of getprop and setprop that you should be aware of Setprop() become doubles in the property tree. Properties are converted to a numeric 1 or 0 by Getprop() as Nasal scalars, of course, and boolean Note that Nasal's notion of "type" is coarser than that of the Setprop("/sim/bar", getprop("/sim/foo")) Of the "/sim/foo" property to the "/sim/bar" property: For example, the following Nasal code copies the value Setting and Inspecting FlightGear Properties getprop() and setprop()įunctions to interact with the global property tree. Nasal source files below for more information. Means that any local variables you set inside the script will be lost That you should avoid placing large code blocks inside a Note that the current implementation parses the Nasal code inside Print(cmdarg().getNode("value").getValue()) Will print the current axis value to the console: See below for fullĭocumentation, but as an example the following "joystick axis" binding This argument isĪvailable as a props.Node object and is returned from theīuilt-in cmdarg() function. Some command have SGPropertyNode arguments. Order, to the FlightGear console as a single-line log entry. This isĪ simple extension function that simply prints out its arguments, in The code above invokes the print() function. The relevant command type is "nasal", and you place your Nasal code Nasal scripts can be used as FGBinding objects, and can thereforeĪppear anywhere in a configuration file (keyboard, mouse and joystick The information there is sparse, but you should have it ready forīasic Nasal/FlightGear Integration Calling Nasal from Configuration File Bindings It is not an introduction to the Nasal language This document is a tutorial on how to interface Nasal scripts If the rendering is insufficient you may try to find and view the page on the flightgear-2020.3.18.tar.bz2 project site itself. You can here alternatively try to browse the pure source code or just view or download the uninterpreted raw source code. In general, contributions to the manual target next by default, but we also apply them to the release/2020.3 branch if it makes sense.Caution: In this restricted "Fossies" environment the current HTML page may not be correctly presentated and may have some non-functional links. ![]() On the other hand, the LaTeX source code of the manual for FlightGear 2020.3 lives in the release/2020.3 branch of getstart. Note that this link is for the next branch, where most of the development happens. You will find the source code here, at the FlightGear Git repository. You will find contacts of current maintainers in the Manual itself. Turn your head to the FlightGear developers' mailing list and you will find someone to talk about how to improve The Manual.
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