crosshair controls now only active on devices with screen diagonals > 7"

Assets/Resources/UI/ARView.prefab

@@ -289,7 +289,7 @@ GameObject:
   m_IsActive: 1
 --- !u!1 &1461557036225360
 GameObject:
-  m_ObjectHideFlags: 0
+  m_ObjectHideFlags: 1
   m_PrefabParentObject: {fileID: 0}
   m_PrefabInternal: {fileID: 100100000}
   serializedVersion: 5
@@ -556,7 +556,7 @@ Transform:
   - {fileID: 4802536742996532}
   - {fileID: 4501641520781714}
   m_Father: {fileID: 224804495073354866}
-  m_RootOrder: 4
+  m_RootOrder: 3
   m_LocalEulerAnglesHint: {x: 0, y: 0, z: 0}
 --- !u!4 &4501641520781714
 Transform:
@@ -777,6 +777,7 @@ MonoBehaviour:
   m_EditorClassIdentifier: 
   DetailsPanel: {fileID: 114451700018395534}
   ProjectionEffect: {fileID: 114717549802739924}
+  Crosshairs: {fileID: 1466316426385876}
 --- !u!114 &114116594606330924
 MonoBehaviour:
   m_ObjectHideFlags: 1
@@ -2222,7 +2223,7 @@ RectTransform:
   - {fileID: 224757765789199188}
   - {fileID: 224017865803686938}
   m_Father: {fileID: 224804495073354866}
-  m_RootOrder: 3
+  m_RootOrder: 2
   m_LocalEulerAnglesHint: {x: 0, y: 0, z: 0}
   m_AnchorMin: {x: 0, y: 0}
   m_AnchorMax: {x: 0, y: 0}
@@ -2370,8 +2371,9 @@ RectTransform:
   - {fileID: 224781237586130416}
   - {fileID: 224060988043194314}
   - {fileID: 224272151730405692}
+  - {fileID: 224954540062687134}
   m_Father: {fileID: 224804495073354866}
-  m_RootOrder: 2
+  m_RootOrder: 1
   m_LocalEulerAnglesHint: {x: 0, y: 0, z: 0}
   m_AnchorMin: {x: 0, y: 0}
   m_AnchorMax: {x: 1, y: 1}
@@ -2485,7 +2487,6 @@ RectTransform:
   m_LocalScale: {x: 0, y: 0, z: 0}
   m_Children:
   - {fileID: 224632685815868688}
-  - {fileID: 224954540062687134}
   - {fileID: 224620536568054620}
   - {fileID: 224250538007241578}
   - {fileID: 4112130633259944}
@@ -2638,8 +2639,8 @@ RectTransform:
   m_Children:
   - {fileID: 224567183914418614}
   - {fileID: 224216194665817218}
-  m_Father: {fileID: 224804495073354866}
-  m_RootOrder: 1
+  m_Father: {fileID: 224620536568054620}
+  m_RootOrder: 3
   m_LocalEulerAnglesHint: {x: 0, y: 0, z: 0}
   m_AnchorMin: {x: 1, y: 0.5}
   m_AnchorMax: {x: 1, y: 0.5}

Assets/RothenburgAR/Scripts/UI/ARViewBehaviour.cs

@@ -8,6 +8,12 @@ namespace RothenburgAR.UI
     {
         public DetailsPanelBehaviour DetailsPanel;
         public ProjectionEffectBehaviour ProjectionEffect;
+        public GameObject Crosshairs;
+
+        public void Start()
+        {
+            Crosshairs.SetActive(DisplayManager.Instance.AllowCrosshairControls);
+        }
 
         public void DisplayPoiDetails(PoiBehaviour poi, bool animated = true)
         {

Assets/RothenburgAR/Scripts/UI/DisplayManager.cs

@@ -18,7 +18,11 @@ namespace RothenburgAR.UI
 
         public readonly UnityEvent OnOrientationChange = new UnityEvent();
         public ScreenOrientation ScreenOrientation;
-        private Vector2 resolution; // Current Resolution
+
+        private static readonly float CrosshairControlsDisplaySizeThreshold = 7f;
+        public bool AllowCrosshairControls { get; private set; }
+
+        private Vector2 lastKnownResolution; // Current Resolution
         private ScreenOrientation orientation; // Current Screen Orientation
 
         static void Init()
@@ -35,12 +39,17 @@ namespace RothenburgAR.UI
             scaler.screenMatchMode = UnityEngine.UI.CanvasScaler.ScreenMatchMode.MatchWidthOrHeight;
             scaler.matchWidthOrHeight = .5f;
 
-            instance.resolution = new Vector2(Screen.width, Screen.height);
+            instance.lastKnownResolution = new Vector2(Screen.width, Screen.height);
             instance.orientation = Screen.orientation;
 
-            instance.ScreenOrientation = instance.resolution.x < instance.resolution.y
+            instance.ScreenOrientation = instance.lastKnownResolution.x < instance.lastKnownResolution.y
                     ? ScreenOrientation.Portrait
                     : ScreenOrientation.Landscape;
+
+            // Screen diagonal in logical inches
+            var diagonalIn = Mathf.Sqrt(Mathf.Pow(Screen.height, 2) + Mathf.Pow(Screen.width, 2)) / Screen.dpi;
+            Debug.Log("Screen Diagonal is something like " + diagonalIn + " inches.");
+            instance.AllowCrosshairControls = diagonalIn >= CrosshairControlsDisplaySizeThreshold;
         }
 
         private void Start()
@@ -53,12 +62,12 @@ namespace RothenburgAR.UI
 
         private void OnRectTransformDimensionsChange()
         {
-            if (orientation != Screen.orientation || !(resolution.x == Screen.width && resolution.y == Screen.height))
+            if (orientation != Screen.orientation || !(lastKnownResolution.x == Screen.width && lastKnownResolution.y == Screen.height))
             {
                 orientation = Screen.orientation;
-                resolution = new Vector2(Screen.width, Screen.height);
-                ScreenOrientation = resolution.x < resolution.y 
-                    ? ScreenOrientation.Portrait 
+                lastKnownResolution = new Vector2(Screen.width, Screen.height);
+                ScreenOrientation = lastKnownResolution.x < lastKnownResolution.y
+                    ? ScreenOrientation.Portrait
                     : ScreenOrientation.Landscape;
 
                 OnOrientationChange.Invoke();