The flight graph is stored as a series of delta elements at 1m resolution and a list of nodes. Both lists share the same buffer. Each delta element takes up 2 bytes or sometimes 6 bytes if the delta is large. The path can consist of multiple disconnected segments, in which case the gaps are stored as delta elements with a jump-bit set.
Once in a while or when required the graph is consolidated, which means:
- Points that lie roughly in a line are replaced by a single line
- Points that lie close to previously recorded lines are pruned
- For lines that pass close to each other a node element is created
Furthermore:
- The graph is recorded at a higher precision closer to home
- If the graph becomes full, the overall precision is reduced and the whole graph is re-consolidated
- If the graph becomes full once more, all data is removed except for the shortest path home at that moment. One of these actions is repeated at each subsequent fill-up.
Path finding information is generated/refreshed on demand and stored in the nodes. During return-to-home, the best direction to home is continuously evaluated by using the information stored in the nodes.
The graph recording and path finding is implemented in navigator/tracker.cpp.
The graph based return-to-home is implemented in navigator/smart_rtl.cpp.
* Add jsbsim bridge to enable jsbsim for px4 SITL/HIL on jsbsim
This is a PX4 HIL/SITL integration into JSBSim. JSBSim is an open source flight dynamics model (http://jsbsim.sourceforge.net/)
Currently there are three models available which is the rascal, quadrotor_x, hexarotor_x integrated into the bridge.
The simulation can be run with the firmware with the following command for example
```
make px4_sitl jsbsim_rascal
```
The visualization is done flightgear and is done by the bridge sending UDP packets to flightgear. To disable the visualization `HEADLESS=1` when running the make command.
The simulation can be configured through the configuration files under the `config` directory through a xml file. Senor configurations, The xml file name should match the name of the model.
* Update Tools/sitl_run.sh
Co-authored-by: Beat Küng <beat-kueng@gmx.net>
Co-authored-by: Beat Küng <beat-kueng@gmx.net>
- fix gazebo SITL debug
- now prompts you to select vehicle
- devcontainer.json container support https://code.visualstudio.com/docs/remote/containers
- this allows you to jump straight into working within a container (px4-dev-nuttx) on a fresh machine
- also helps with Codespaces https://github.com/features/codespaces
- plugin updates
- cpp extension pack, spell checking, CTest support
- cleanup intellisense
- the backup tag parser was a resource hog and didn't work very well
- fix problemMatcher support so that you can click on a build failure
- sitl_gazebo in PX4/Firmware (ac732cdebad261f0008ebcadaf78e0afbee29716): 78bba3f25e
- sitl_gazebo current upstream: 9d2b19784c
- Changes: 78bba3f25e...9d2b19784c
9d2b197 2020-09-12 JaeyoungLim - Use jinja templates for standard_vtol and plane model (#590)
01587e6 2020-09-12 Lorenz Meier - Include GLib2 properly The previous approach did not actually search for glib2 in the system but hardcoded the name.
e49fac5 2020-09-12 bazooka joe - cleanups: rename class vars to be with underscore
6fb9bd9 2020-09-12 bazooka joe - move initializers to h file
29999c6 2020-09-12 JaeyoungLim - Update boat gps sensor (#595)
a208640 2020-09-09 petertheprocess - fix the rudder deflection bug. (#588)
- inconsistency checks now run continuously instead of only preflight
- keep inconsistencies for all sensors
- add per sensor data validator state as overall health flag
* [WIP] i2c_spi_buses: add '-q' for quiet startup flag
And enable for optional board sensors.
* ROMFS: rc.sensors try starting all optional I2C sensors quietly
Co-authored-by: Daniel Agar <daniel@agar.ca>
This should prevent the race between gzserver and gz model and fix the
integration tests which sometimes timeout because the model is not
spawned correctly.
This patch also changes the shebang to what's generally recommended.
If `make px4_sitl_default` is run, and not `make px4_sitl_default gazebo` then each model instance will throw the following errors:
```
[Err] [Plugin.hh:178] Failed to load plugin libgazebo_gps_plugin.so: libgazebo_gps_plugin.so: cannot open shared object file: No such file or directory
[Err] [Plugin.hh:178] Failed to load plugin libgazebo_multirotor_base_plugin.so: libgazebo_multirotor_base_plugin.so: cannot open shared object file: No such file or directory
[Err] [Plugin.hh:178] Failed to load plugin libgazebo_motor_model.so: libgazebo_motor_model.so: cannot open shared object file: No such file or directory
[Err] [Plugin.hh:178] Failed to load plugin libgazebo_motor_model.so: libgazebo_motor_model.so: cannot open shared object file: No such file or directory
[Err] [Plugin.hh:178] Failed to load plugin libgazebo_motor_model.so: libgazebo_motor_model.so: cannot open shared object file: No such file or directory
[Err] [Plugin.hh:178] Failed to load plugin libgazebo_motor_model.so: libgazebo_motor_model.so: cannot open shared object file: No such file or directory
[Err] [Plugin.hh:178] Failed to load plugin libgazebo_groundtruth_plugin.so: libgazebo_groundtruth_plugin.so: cannot open shared object file: No such file or directory
[Err] [Plugin.hh:178] Failed to load plugin libgazebo_magnetometer_plugin.so: libgazebo_magnetometer_plugin.so: cannot open shared object file: No such file or directory
[Err] [Plugin.hh:178] Failed to load plugin libgazebo_barometer_plugin.so: libgazebo_barometer_plugin.so: cannot open shared object file: No such file or directory
[Err] [Plugin.hh:178] Failed to load plugin libgazebo_mavlink_interface.so: libgazebo_mavlink_interface.so: cannot open shared object file: No such file or directory
[Err] [Plugin.hh:178] Failed to load plugin libgazebo_imu_plugin.so: libgazebo_imu_plugin.so: cannot open shared object file: No such file or directory
```
- sitl_gazebo in PX4/Firmware (f4d7052bece7608fc3f94b6520b788fc83339635): 629e5f5c23
- sitl_gazebo current upstream: ce1eca2bd0
- Changes: 629e5f5c23...ce1eca2bd0
ce1eca2 2020-07-19 Daniel Leonard Robinson - New vehicle type: Airship (#490)
df186d2 2020-07-18 TSC21 - use 'EnableC++XX' and remove duplicated compiler sets
60e5d4e 2020-07-18 TSC21 - remove the check for the 'px4' binary (it's never found since it's built in parallel with sitl_gazebo)
a3b5c5e 2020-07-19 JaeyoungLim - Fix moment calculation (#545)
07820ee 2020-07-19 JaeyoungLim - Fix gimbal imu sensors intefering with each other (#549)
