From 0ca5a60f25da695caef75eadc6a3f88ce91b889f Mon Sep 17 00:00:00 2001
From: Andrew Tridgell <tridge@samba.org>
Date: Wed, 4 Jun 2014 09:40:07 +1000
Subject: [PATCH] autotest: added -R to sim_vehicle.sh for reverse throttle

---
 Tools/autotest/jsbsim/runsim.py |  3 +++
 Tools/autotest/sim_vehicle.sh   | 10 +++++++++-
 2 files changed, 12 insertions(+), 1 deletion(-)

diff --git a/Tools/autotest/jsbsim/runsim.py b/Tools/autotest/jsbsim/runsim.py
index 1cc21b2ca4..3fa0299d09 100755
--- a/Tools/autotest/jsbsim/runsim.py
+++ b/Tools/autotest/jsbsim/runsim.py
@@ -80,6 +80,8 @@ def process_sitl_input(buf):
     aileron  = (pwm[0]-1500)/500.0
     elevator = (pwm[1]-1500)/500.0
     throttle = (pwm[2]-1000)/1000.0
+    if opts.revthr:
+        throttle = 1.0 - throttle
     rudder   = (pwm[3]-1500)/500.0
 
     if opts.elevon:
@@ -170,6 +172,7 @@ parser.add_option("--home",    type='string', help="home lat,lng,alt,hdg (requir
 parser.add_option("--script",  type='string', help='jsbsim model script', default='jsbsim/rascal_test.xml')
 parser.add_option("--options", type='string', help='jsbsim startup options')
 parser.add_option("--elevon", action='store_true', default=False, help='assume elevon input')
+parser.add_option("--revthr", action='store_true', default=False, help='reverse throttle')
 parser.add_option("--vtail", action='store_true', default=False, help='assume vtail input')
 parser.add_option("--wind", dest="wind", help="Simulate wind (speed,direction,turbulance)", default='0,0,0')
 
diff --git a/Tools/autotest/sim_vehicle.sh b/Tools/autotest/sim_vehicle.sh
index 0714bd55c1..8e2d9cc45b 100755
--- a/Tools/autotest/sim_vehicle.sh
+++ b/Tools/autotest/sim_vehicle.sh
@@ -16,6 +16,7 @@ USE_GDB_STOPPED=0
 CLEAN_BUILD=0
 START_ANTENNA_TRACKER=0
 WIPE_EEPROM=0
+REVERSE_THROTTLE=0
 
 usage()
 {
@@ -33,6 +34,7 @@ Options:
     -L               select start location from Tools/autotest/locations.txt
     -c               do a make clean before building
     -w               wipe EEPROM and reload parameters
+    -R               reverse throttle in plane
     -f FRAME         set aircraft frame type
                      for copters can choose +, X, quad or octa
                      for planes can choose elevon or vtail
@@ -53,7 +55,7 @@ EOF
 
 
 # parse options. Thanks to http://wiki.bash-hackers.org/howto/getopts_tutorial
-while getopts ":I:VgGcj:TL:v:hwf:" opt; do
+while getopts ":I:VgGcj:TL:v:hwf:R" opt; do
   case $opt in
     v)
       VEHICLE=$OPTARG
@@ -67,6 +69,9 @@ while getopts ":I:VgGcj:TL:v:hwf:" opt; do
     T)
       START_ANTENNA_TRACKER=1
       ;;
+    R)
+      REVERSE_THROTTLE=1
+      ;;
     G)
       USE_GDB=1
       ;;
@@ -232,6 +237,9 @@ fi
 
 case $VEHICLE in
     ArduPlane)
+        [ "$REVERSE_THROTTLE" == 1 ] && {
+            EXTRA_SIM="$EXTRA_SIM --revthr"
+        }
         RUNSIM="nice $autotest/jsbsim/runsim.py --home=$SIMHOME --simin=$SIMIN_PORT --simout=$SIMOUT_PORT --fgout=$FG_PORT $EXTRA_SIM"
         PARMS="ArduPlane.parm"
         if [ $WIPE_EEPROM == 1 ]; then