Adds support for the home long press to recenter event

app/src/picovr/cpp/DeviceDelegatePicoVR.cpp

@@ -4,6 +4,7 @@
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
 #include "DeviceDelegatePicoVR.h"
+#include "DeviceUtils.h"
 #include "ElbowModel.h"
 #include "VRBrowserPico.h"
 
@@ -91,6 +92,7 @@ struct DeviceDelegatePicoVR::State {
   float ipd = 0.064f;
   float fov = (float) (51.0 * M_PI / 180.0);
   int32_t focusIndex = 0;
+  bool recentered = false;
 
   void Initialize() {
     vrb::RenderContextPtr localContext = context.lock();
@@ -286,9 +288,8 @@ DeviceDelegatePicoVR::GetReorientTransform() const {
 
 void
 DeviceDelegatePicoVR::SetReorientTransform(const vrb::Matrix& aMatrix) {
-  // Until we can get the new heading don't reset it on the Neo 2
-  if (m.type != kTypeNeo2) {
-    // m.reorientMatrix = aMatrix;
+  if (m.type == kTypeNeo2) {
+    m.reorientMatrix = aMatrix;
   }
 }
 
@@ -362,9 +363,14 @@ DeviceDelegatePicoVR::StartFrame() {
   head.TranslateInPlace(m.position);
 
   if (m.renderMode == device::RenderMode::StandAlone) {
+    if (m.recentered) {
+      m.reorientMatrix = DeviceUtils::CalculateReorientationMatrix(head, kAverageHeight);
+    }
     head.TranslateInPlace(m.headOffset);
   }
 
+  m.recentered = false;
+
   m.cameras[0]->SetHeadTransform(head);
   m.cameras[1]->SetHeadTransform(head);
   m.UpdateControllers();
@@ -470,6 +476,10 @@ DeviceDelegatePicoVR::UpdateControllerButtons(const int aIndex, const int32_t aB
   m.controllers[aIndex].touched = touched;
 }
 
+void
+DeviceDelegatePicoVR:: Recenter() {
+    m.recentered = true;
+}
 
 DeviceDelegatePicoVR::DeviceDelegatePicoVR(State &aState) : m(aState) {}
 

app/src/picovr/cpp/DeviceDelegatePicoVR.h

@@ -53,6 +53,7 @@ class DeviceDelegatePicoVR : public DeviceDelegate {
   void UpdateControllerConnected(const int aIndex, const bool aConnected);
   void UpdateControllerPose(const int aIndex, const bool a6Dof, const vrb::Vector& aPosition, const vrb::Quaternion& aRotation);
   void UpdateControllerButtons(const int aIndex, const int32_t aButtonsState, const float aGrip, const float axisX, const float axisY, const bool touched);
+  void Recenter();
 protected:
   struct State;
   DeviceDelegatePicoVR(State& aState);

app/src/picovr/cpp/native-lib.cpp

@@ -139,6 +139,14 @@ JNI_METHOD(void, nativeUpdateControllerState)
   sDevice->UpdateControllerButtons(index, buttons, grip, axisX, axisY, touched);
 }
 
+JNI_METHOD(void, nativeRecenter)
+(JNIEnv* env, jobject) {
+  if (gDestroyed) {
+    return;
+  }
+  sDevice->Recenter();
+}
+
 JNI_METHOD(void, queueRunnable)
 (JNIEnv* aEnv, jobject, jobject aRunnable) {
   if (gDestroyed) {

app/src/picovr/java/org/mozilla/vrbrowser/PlatformActivity.java

@@ -6,6 +6,10 @@
 package org.mozilla.vrbrowser;
 
 import android.Manifest;
+import android.content.BroadcastReceiver;
+import android.content.Context;
+import android.content.Intent;
+import android.content.IntentFilter;
 import android.os.Bundle;
 import android.util.Log;
 
@@ -29,6 +33,7 @@
 import com.psmart.vrlib.VrActivity;
 import com.psmart.vrlib.PicovrSDK;
 
+import org.mozilla.vrbrowser.utils.DeviceType;
 import org.mozilla.vrbrowser.utils.SystemUtils;
 
 
@@ -42,6 +47,16 @@ public static boolean filterPermission(final String aPermission) {
         return false;
     }
 
+    private BroadcastReceiver mKeysReceiver = new BroadcastReceiver() {
+        @Override
+        public void onReceive(Context context, Intent intent) {
+            String s = intent.getStringExtra("reason");
+            if (s.equalsIgnoreCase("recenter")) {
+                nativeRecenter();
+            }
+        }
+    };
+
     CVControllerManager mControllerManager;
     HbManager mHbManager;
     private boolean mControllersReady;
@@ -60,6 +75,10 @@ protected void onCreate(Bundle bundle) {
         nativeOnCreate();
         super.onCreate(bundle);
 
+        IntentFilter filter = new IntentFilter();
+        filter.addAction(Intent.ACTION_CLOSE_SYSTEM_DIALOGS);
+        registerReceiver(mKeysReceiver, filter);
+
         if (ControllerClient.isControllerServiceExisted(this)) {
             mControllerManager = new CVControllerManager(this);
             mControllerManager.setListener(this);
@@ -122,6 +141,7 @@ protected void onDestroy() {
         if (mControllerManager != null) {
             mControllerManager.setListener(null);
         }
+        unregisterReceiver(mKeysReceiver);
     }
 
     @Override
@@ -354,5 +374,6 @@ private void cancelAllHaptics() {
     protected native void nativeSetFocusedController(int index);
     protected native void nativeUpdateControllerState(int index, boolean connected, int buttons, float grip, float axisX, float axisY, boolean touched);
     protected native void nativeUpdateControllerPose(int index, boolean dof6, float px, float py, float pz, float qx, float qy, float qz, float qw);
+    protected native void nativeRecenter();
     protected native void queueRunnable(Runnable aRunnable);
 }