From 48561b0c8afaa1e619e160ed57a8276f04597773 Mon Sep 17 00:00:00 2001
From: Paul Riseborough <p_riseborough@live.com.au>
Date: Tue, 12 Jun 2018 16:52:26 +1000
Subject: [PATCH] EKF: Update optical flow interface documentation

---
 EKF/estimator_interface.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/EKF/estimator_interface.h b/EKF/estimator_interface.h
index 8b3e23f317..4e72c4bcb5 100644
--- a/EKF/estimator_interface.h
+++ b/EKF/estimator_interface.h
@@ -180,6 +180,7 @@ public:
 	void setRangeData(uint64_t time_usec, float data);
 
 	// set optical flow data
+	// if optical flow sensor gyro delta angles are not available, set gyroXYZ vector fields to NaN and the EKF will use its internal delta angle data instead
 	void setOpticalFlowData(uint64_t time_usec, flow_message *flow);
 
 	// set external vision position and attitude data