Howto:Add new fgcommands to FlightGear: Difference between revisions

Howto:Add new fgcommands to FlightGear (view source)

158 bytes added , 10 February 2012

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@@ Line 83: / Line 83: @@
 <syntaxhighlight lang="php">
-  fgcommand("null", rops.Node.new( {"filename": "stars.jpeg"} ) );
+  fgcommand("null", props.Node.new( {"filename": "stars.jpeg"} ) );
 </syntaxhighlight>
+In general, using a temporary property tree object is preferable and recommended if you don't need to access the data in the global property tree otherwise.
 So, what the C++ code is doing once it is called, is getting the arguments out of the property argument, see [http://gitorious.org/fg/flightgear/blobs/next/src/Main/fg_commands.cxx#line1183 line 1183]:
@@ Line 106: / Line 106: @@
 * const char * 	getStringValue () const: 	Get a string value for this node.
-However, before actually trying to read in an argument, it is better to first check if he node is actually available, too:
+However, before actually trying to read in an argument, it is better to first check if the node is actually available, too:
 <syntaxhighlight lang="cpp">