SITL: added an example for plane/quad follow

libraries/SITL/examples/Follow/plane_quad.sh

@@ -0,0 +1,36 @@
+#!/bin/bash
+
+# a quad following a plane
+
+# assume we start the script from the root directory
+ROOTDIR=$PWD
+COPTER=$ROOTDIR/build/sitl/bin/arducopter
+PLANE=$ROOTDIR/build/sitl/bin/arduplane
+
+[ -x "$COPTER" -a -x "$PLANE" ] || {
+    ./waf configure --board sitl
+    ./waf plane copter
+}
+
+# setup for either TCP or multicast
+#UARTA="tcp:0"
+UARTA="mcast:"
+
+PLANE_DEFAULTS="$ROOTDIR/Tools/autotest/default_params/plane.parm"
+COPTER_DEFAULTS="$ROOTDIR/Tools/autotest/default_params/copter.parm"
+
+mkdir -p swarm/plane swarm/copter
+(cd swarm/plane && $PLANE --model plane --uartA $UARTA --defaults $PLANE_DEFAULTS) &
+
+# create default parameter file for the follower
+cat <<EOF > swarm/copter/follow.parm
+SYSID_THISMAV 2
+FOLL_ENABLE 1
+FOLL_OFS_X -5
+FOLL_OFS_TYPE 1
+FOLL_SYSID 1
+FOLL_DIST_MAX 1000
+EOF
+
+(cd swarm/copter && $COPTER --model quad --uartA $UARTA --instance 1 --defaults $COPTER_DEFAULTS,follow.parm) &
+wait