From c64d00fb87f039f48c45161682d188a31d0c2889 Mon Sep 17 00:00:00 2001
From: Ryan Pavlik <ryan@sensics.com>
Date: Sun, 30 Aug 2015 18:14:13 -0500
Subject: [PATCH 1/2] Make the eye call update in OnPreRender, not
 OnPostRender.

---
 OSVR-Unity/Assets/OSVRUnity/src/VREye.cs | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/OSVR-Unity/Assets/OSVRUnity/src/VREye.cs b/OSVR-Unity/Assets/OSVRUnity/src/VREye.cs
index 711f36b..9e6fbb3 100644
--- a/OSVR-Unity/Assets/OSVRUnity/src/VREye.cs
+++ b/OSVR-Unity/Assets/OSVRUnity/src/VREye.cs
@@ -130,10 +130,10 @@ private void SetViewportRects()
                 }
             }
 
-            //Called after a camera finishes rendering the scene.
+            //Called before a camera renders the scene.
             //the goal here is to update the client often to make sure we have the most recent tracker data
             //this helps reduce latency
-            void OnPostRender()
+            void OnPreRender()
             {
                 clientKit.context.update();
             }

From 69cc177473444d66b0061e4e7e16ce815290ba9d Mon Sep 17 00:00:00 2001
From: Ryan Pavlik <ryan@sensics.com>
Date: Sun, 30 Aug 2015 18:14:42 -0500
Subject: [PATCH 2/2] Make the eye actually update the head's transform in
 OnPreRender.

---
 OSVR-Unity/Assets/OSVRUnity/src/VREye.cs  | 10 ++++++++++
 OSVR-Unity/Assets/OSVRUnity/src/VRHead.cs | 10 ++++++++++
 2 files changed, 20 insertions(+)

diff --git a/OSVR-Unity/Assets/OSVRUnity/src/VREye.cs b/OSVR-Unity/Assets/OSVRUnity/src/VREye.cs
index 9e6fbb3..eb24a33 100644
--- a/OSVR-Unity/Assets/OSVRUnity/src/VREye.cs
+++ b/OSVR-Unity/Assets/OSVRUnity/src/VREye.cs
@@ -46,6 +46,8 @@ public class VREye : MonoBehaviour
             [HideInInspector]
             public Transform cachedTransform;
             [HideInInspector]
+            public VRHead head;
+            [HideInInspector]
             public K1RadialDistortion DistortionEffect
             {
               get
@@ -97,6 +99,10 @@ void Init()
                 {
                     clientKit = GameObject.FindObjectOfType<ClientKit>();
                 }
+                if (head == null)
+                {
+                    gameObject.GetComponentInParent<VRHead>();
+                }
                 //cache:
                 cachedTransform = transform;
 
@@ -136,6 +142,10 @@ private void SetViewportRects()
             void OnPreRender()
             {
                 clientKit.context.update();
+                if (head)
+                {
+                    head.UpdatePose();
+                }
             }
             #endregion
 
diff --git a/OSVR-Unity/Assets/OSVRUnity/src/VRHead.cs b/OSVR-Unity/Assets/OSVRUnity/src/VRHead.cs
index c9f6ab0..510c908 100644
--- a/OSVR-Unity/Assets/OSVRUnity/src/VRHead.cs
+++ b/OSVR-Unity/Assets/OSVRUnity/src/VRHead.cs
@@ -55,6 +55,7 @@ public class VRHead : MonoBehaviour
             private DeviceDescriptor _deviceDescriptor;
             private DisplayInterface _displayInterface;
             private bool _initDisplayInterface = false;
+            private PoseInterface _poseIf;
             #endregion
 
             #region Init
@@ -69,6 +70,7 @@ void Start()
                 }
 */
                 _displayInterface = GetComponent<DisplayInterface>();
+                _poseIf = GetComponent<PoseInterface>();
 
                 //update VRHead with info from the display interface if it has been initialized
                 //it might not be initialized if it is still parsing a display json file
@@ -103,6 +105,12 @@ void Update()
                     UpdateViewMode();
                 }
             }
+            public void UpdatePose()
+            {
+                var state = _poseIf.Interface.GetState();
+                transform.localPosition = state.Value.Position;
+                transform.localRotation = state.Value.Rotation;
+            }
             #endregion
 
             #region Public Methods
@@ -165,6 +173,8 @@ void CatalogEyes()
                     switch (currentEye.eye)
                     {
                         case Eye.left:
+                            // Only need one eye to update the head.
+                            currentEye.head = this;
                             _leftEye = currentEye;
                             break;