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Julian Smith f8b5e6ab81 simgear/props/props.*: Modification to calling of listeners when property values change. 
We now default to not calling parent nodes' listeners when a node's value
changes.

This avoid overheads introduced by recent addition of locking - walking up the
parent nodes needs to lock/unlock at each step, and was previously happening
whenever any node in the entire tree had its value changed, causing noticable
slowdown.

Node creation/removal still calls parent nodes' listeners as before.

If a node has new attribute VALUE_CHANGED_UP set, we do call its parent node's
listeners.

New SGPropertyNode::Attribute's VALUE_CHANGED_UP and VALUE_CHANGED_DOWN:

    VALUE_CHANGED_UP: if set, when fireValueChanged() is called we also call
    our parent node's fireValueChanged().

    VALUE_CHANGED_DOWN: if set, new and existing child nodes have their
    VALUE_CHANGED_UP and VALUE_CHANGED_DOWN attributes set.

    Once set, these attributes cannot be cleared (because to correctly handle
    this would require reference counting).

SGPropertyLockControl(): added parent_listeners arg. If true, we always call
parent node's fireValueChanged() when a node value changes; this restores
previous property system behaviour. Default is false.

Extra overall timing diagnostics.
2021-06-02 22:19:21 +01:00
3rdparty NULL check after malloc 2021-02-13 22:25:31 -06:00
CMakeModules CMake: remove .cmake extensions 2021-01-10 13:32:59 +00:00
simgear simgear/props/props.*: Modification to calling of listeners when property values change. 2021-06-02 22:19:21 +01:00
.gitignore Add compile_commands.json to .gitignore 2021-04-01 01:40:22 +02:00
AUTHORS Added Curt to empty Authors file as CVS test. 2001-12-11 22:23:25 +00:00
ChangeLog Let the version number reflect the current state of the release process. 2010-01-21 06:15:18 +01:00
CMakeLists.txt Raise minimum OSG version to 3.6 2021-05-24 16:47:56 +01:00
COPYING Fix rpmlint/Linux packager complaints 2012-05-05 00:30:16 +02:00
Doxyfile Fix conditional compile logic 2019-12-15 00:18:39 -06:00
DoxygenMain.cxx Various doxygen improvements/fixes. 2018-01-12 08:32:04 +01:00
INSTALL Remove plib dep references from documentation files 2012-08-29 12:08:27 +02:00
NEWS Attempt to sort out the version number mess in preparation for a 1.9.0 release. 2008-12-19 20:39:59 +00:00
README Update README/INSTALL documentation. 2012-06-26 22:43:48 +02:00
README.cmake Remove plib dep references from documentation files 2012-08-29 12:08:27 +02:00
README.OSG Update README/INSTALL documentation. 2012-06-26 22:43:48 +02:00
README.sound Detect AeonWave and if it is installed use it, otherwise fall back to OpenAL. Also let get_available_devices() use C++ strings instead of const char* 2018-06-02 14:06:15 +02:00
README.zlib Updates to remove unneeded and old version of zlib source. 2006-03-23 21:59:59 +00:00
simgear-version Update version file 2020-10-13 22:28:42 +01:00
SimGearConfig.cmake.in Use the find_dependency option to parse Simgear dependencies to FlightGear 2021-03-08 16:15:14 +01:00
Thanks SimGear: Typo in Thanks file 2007-07-23 22:00:31 +00:00

README 

SimGear - Simulator Construction Tools
======================================
http://www.flightgear.org

SimGear is a set of open-source libraries designed to be used as building
blocks for quickly assembling 3d simulations, games, and visualization
applications.

SimGear is developed by the FlightGear project and also provides the base
for the FlightGear Flight Simulator.

Source code for SimGear is released under the GNU Library General Public
License (LGPL) - see COPYING for license details.

See INSTALL file for help on building SimGear.