[[PageOutline]]

__NOTE__: For Flair version <= 0.2.1, see [wiki:circlefollower_old this page].

= Testing Flair on a circle follower example (using motion capture) =

This page explains how to compile and test a program using Flair. It simulates an UAV (x4 or x8) and a man moving in a room with motion capture system. The uav is making a circle around the man, following its position.

== Compilation ==

There is various ways to compile/recompile it:

* [wiki:compile_all#CompileFlairlibrariestoolsanddemosalltogether Compile among everything] (recommended), maybe you have already done it!
* [wiki:compile_all#Recompileaparticularproject Recompile only this demo]
* [wiki:compile_all#Compileyourownproject Generate and compile it alone]

== Execution on a PC ==

=== ground control station ===

{{{
$ $FLAIR_ROOT/flair-install/bin/tools/scripts/launch_flairgcs.sh
}}}

=== programs for a x4 ===

On the first terminal (simulator program):
{{{
$ cd $FLAIR_ROOT/flair-install/bin/demos/core2-64/CircleFollower
$ ./simulator_x4.sh
}}}
On a second one (control program):
{{{
$ cd $FLAIR_ROOT/flair-install/bin/demos/core2-64/CircleFollower
$ ./x4.sh
}}}

These scripts, as for ground control station, launch the programs with some arguments.

Note that the scripts also detect if the system uses Xenomai or not, in order to launch the corresponding program version (real time or not).

=== programs for a x8 ===

On the first terminal (simulator program):
{{{
$ cd $FLAIR_ROOT/flair-install/bin/demos/core2-64/CircleFollower
$ ./simulator_x8.sh
}}}
On a second one (control program):
{{{
$ cd $FLAIR_ROOT/flair-install/bin/demos/core2-64/CircleFollower
$ ./x8.sh
}}}

These scripts, as for ground control station, launch the programs with some arguments.

Note that the scripts also detect if the system uses Xenomai or not, in order to launch the corresponding program version (real time or not).

=== DualShock3 controller (optional) ===

If you have a DualShock3, you can use it to control the UAV. Make sure you have configured the bluetooth first (see [wiki:setup#SetupbluetoothforDualShock3controlleroptional this page]).
{{{
$ $FLAIR_ROOT/flair-install/bin/tools/scripts/dualshock3_local_bt.sh
}}}
If it is the first time you use it with your computer, plug it first with an USB cable in order to pair it. Then you can use bluetooth connection.

If you do not have bluetooth on your computer, you can use the USB connection of the DualShock3 with the following command:
{{{
$ $FLAIR_ROOT/flair-bin/tools/scripts/dualshock3_local_usb.sh
}}}

=== setup ===

When executing the programs, the ground control station should construct itself and show setup and graphs for the programs. 

In the tab ''x4_0/uav'' press the ''take off'' button to take off the uav, and then the ''start_circle'' button to start the trajectory.

In the simulator window, you can change the camera (if configured) with ''page up/down'' keys. You can also press ''a'' to change the axis indicator.


=== Changing 3D environment ===

The 3D environment of the simulator is fixed by the launcher script (''simulator_x4.sh''); to change this environment edit the script and change the prameter ''-s''.

For exemple, you can change it from 
{{{
-s $FLAIR_ROOT/flair-src/models/indoor_flight_arena.xml
}}}
to 
{{{
-s $FLAIR_ROOT/flair-src/models/city_tile.xml
}}}

== Execution on target ==

TODO