From dfe3af0b30698dd9e8559a91e9e1281e5afb78fc Mon Sep 17 00:00:00 2001
From: Andrew Tridgell <tridge@samba.org>
Date: Mon, 9 Dec 2013 14:11:03 +1100
Subject: [PATCH] SITL: update for compass API change

---
 libraries/AP_HAL_AVR_SITL/sitl_compass.cpp | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/libraries/AP_HAL_AVR_SITL/sitl_compass.cpp b/libraries/AP_HAL_AVR_SITL/sitl_compass.cpp
index 3adaecb284..bfa7c7d9fa 100644
--- a/libraries/AP_HAL_AVR_SITL/sitl_compass.cpp
+++ b/libraries/AP_HAL_AVR_SITL/sitl_compass.cpp
@@ -40,9 +40,7 @@ void SITL_State::_update_compass(float rollDeg, float pitchDeg, float yawDeg)
 	}
 	_compass->setHIL(radians(rollDeg), radians(pitchDeg), radians(yawDeg));
 	Vector3f noise = _rand_vec3f() * _sitl->mag_noise;
-	_compass->mag_x += noise.x;
-	_compass->mag_y += noise.y;
-	_compass->mag_z += noise.z;
+        _compass->set_field(_compass->get_field() + noise);
 }
 
 #endif