20,741
edits
Howto:Extend Nasal: Difference between revisions
Jump to navigation
Jump to search
m
→Passing Pointers to Nasal scripts
m (moved Howto: Extend Nasal to Howto:Extend Nasal: Robot: Moved page) |
|||
| Line 282: | Line 282: | ||
naRef naNumValue(naRef n); | naRef naNumValue(naRef n); | ||
naRef naStringValue(naContext c, naRef n); | naRef naStringValue(naContext c, naRef n); | ||
= Wrapping Classes as Nasal Objects (ghosts) = | |||
To be written by Hooray & Zakalawe. For the time being, it's a good idea to take a look at the FGPositioned wrappers for the navdb to see how this is done in Nasal, see [https://gitorious.org/fg/flightgear/blobs/next/src/Scripting/NasalPositioned.cxx $FG_SRC/Scripting/NasalPositioned.cxx]. | |||
There's a plan to eventually unify all those helpers and provide them as part of the FGNasalSys class, so that they automatically become available to all users of the Nasal subsystem. | |||
= Passing Pointers to Nasal scripts = | = Passing Pointers to Nasal scripts = | ||
| Line 301: | Line 306: | ||
This needs to be specifically implemented for each new "ghost" type. | This needs to be specifically implemented for each new "ghost" type. | ||
For an example how something like this is done in the FlightGear context, you may want to check out $FG_SRC/Scripting/nasal-props.cxx, which wraps the SGPropertyNode class ([[SimGear]]) inside a nasal ghost, so that the C++ class is exposed to Nasal scripts. | For an example of how something like this is done in the FlightGear context, you may want to check out $FG_SRC/Scripting/nasal-props.cxx, which wraps the SGPropertyNode class ([[SimGear]]) inside a nasal ghost, so that the C++ class is exposed to Nasal scripts. | ||
= Locking a Nasal context (threading) = | = Locking a Nasal context (threading) = | ||