From b7f501c0b3aee31c9fba328b536e235b90cb2fac Mon Sep 17 00:00:00 2001
From: "U-GAPOS\\andrew" <andrew@highfidelity.io>
Date: Thu, 19 Nov 2015 10:42:53 -0800
Subject: [PATCH] use glm::quat_cast instead of extractRotation()

---
 interface/src/avatar/MyAvatar.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/interface/src/avatar/MyAvatar.cpp b/interface/src/avatar/MyAvatar.cpp
index 1c151bcd3f..989a81fc0c 100644
--- a/interface/src/avatar/MyAvatar.cpp
+++ b/interface/src/avatar/MyAvatar.cpp
@@ -428,7 +428,7 @@ void MyAvatar::updateHMDFollowVelocity() {
         }
         if (_followSpeed > 0.0f) {
             // to compute new velocity we must rotate offset into the world-frame
-            glm::quat sensorToWorldRotation = extractRotation(_sensorToWorldMatrix);
+            glm::quat sensorToWorldRotation = glm::normalize(glm::quat_cast(_sensorToWorldMatrix));
             _followVelocity = _followSpeed * glm::normalize(sensorToWorldRotation * offset);
         }
     }