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cb00971dcb
Simple-time mode is enabled by /sim/time/simple-time/enabled. Simple-time is implemented by new TimeManager::computeTimeDeltasSimple() method. This uses a plain UTC clock (e.g. with CLOCK_REALTIME / gettimeofday()) for basic timing, and sets _mpProtocolClock (as returned by getMPProtocolClockSec()) to the calculated FDM time. We use our own fns to get UTC time and for sleeping, because TimeManager doesn't work for us, e.g. SGTimeStamp::SGTimeStamp() uses _POSIX_MONOTONIC_CLOCK if available so doesn't return UTC. So getMPProtocolClockSec() now serves as a consistent time for both the user aircraft and MP aircraft, avoiding problems where different Flightgear instances could show aircraft in different relative positions. For example it can be put into outgoing MP packets (which are about the time/position of the user aircraft), and used as the target time when calculating the position of multiplayer aircraft using interpolation/extrapolation of incoming MP packets. And getMPProtocolClockSec() can also be written into recordings, ensuring that multiplayer replay will also show all aircraft with the correct relative positions, regardless of varying frame rates at record or replay time. This is tested by 'scripts/python/recordreplay.py --test-motion-mp'. |
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| 3rdparty | ||
| CMakeModules | ||
| docs-mini | ||
| examples | ||
| icons | ||
| man | ||
| package | ||
| scripts | ||
| src | ||
| test_suite | ||
| utils | ||
| .clang-format | ||
| .gitignore | ||
| AUTHORS | ||
| ChangeLog | ||
| CMakeLists.txt | ||
| COPYING | ||
| flightgear-version | ||
| INSTALL | ||
| NEWS | ||
| README | ||
| README.cmake | ||
| README.msvc | ||
| README.OSG | ||
| README.plib | ||
| README.SimGear | ||
| README.sound | ||
| Thanks | ||
Welcome to the FlightGear Flight Simulator project. =================================================== The primary web page for this project is: http://www.flightgear.org For basic installation instructions see the "INSTALL" file. Before you can run FlightGear you will also need to download and install the "base" package which is a collection of textures, sounds, sample scenery, and other data files needed by the sim. For additional install help for specific platforms please browse the "docs-mini/" subdirectory. More complete documentation is available from our web page as a separate distribution. Please take a look at the "Thanks" file for a list of people who have contributed to this project. If you have contributed something but don't find your name in this file. Please send a polite reminder to http://www.flightgear.org/~curt For a summary of changes/additions by version see the "NEWS" file. This project is GPL'd. For complete details on our licensing please see the "COPYING" file. For information on available mailing lists, mailing list archives, and other available source code and documenation, please visit our web site. FlightGear is a product of the collaboration of large international group of volunteers. FlightGear is a work in progress. FlightGear comes with no warrantee. We hope you enjoy FlightGear and/or find it of some value!