added Motion Smoothing toggle

src/res/qml/SteamVRPage.qml

@@ -315,6 +315,14 @@ MyStackViewPage {
             }
         }
 
+        MyToggleButton {
+            id: steamvrMotionSmoothingToggle
+            text: "Motion Smoothing"
+            onCheckedChanged: {
+                SteamVRTabController.setMotionSmoothing(this.checked, false)
+            }
+        }
+
         //No longer Valid
         /*
         MyToggleButton {
@@ -389,6 +397,7 @@ MyStackViewPage {
             //steamvrAllowInterleavedReprojectionToggle.checked = SteamVRTabController.allowInterleavedReprojection
             //steamvrAllowAsyncReprojectionToggle.checked = SteamVRTabController.allowAsyncReprojection
             //steamvrForceReprojectionToggle.checked = SteamVRTabController.forceReprojection
+            steamvrMotionSmoothingToggle.checked = SteamVRTabController.allowMotionSmoothing
             reloadSteamVRProfiles()
         }
 
@@ -422,6 +431,11 @@ MyStackViewPage {
                 steamvrForceReprojectionToggle.checked = SteamVRTabController.forceReprojection
             }
             */
+
+            onMotionSmoothingChanged: {
+                steamvrMotionSmoothingToggle.checked = SteamVRTabController.allowMotionSmoothing
+            }
+
             onSteamVRProfilesUpdated: {
                 reloadSteamVRProfiles()
             }

src/tabcontrollers/SteamVRTabController.cpp

@@ -36,6 +36,7 @@ static const char* vrsettings_compositor_category = "compositor";
 
 void SteamVRTabController::initStage1()
 {
+	initMotionSmoothing();
     eventLoopTick();
     reloadSteamVRProfiles();
 }
@@ -339,6 +340,77 @@ float SteamVRTabController::compositorSuperSampling() const
 {
     return m_compositorSuperSampling;
 }
+
+
+
+bool SteamVRTabController::motionSmoothing() const {
+	return m_motionSmoothing;
+}
+
+/*
+Name: setMotionSmoothing
+
+input: bool value, bool notify
+output: none
+
+@value - value to be passed to m_motionSMoothing
+@notify - whether QML is informed of change (default true)
+
+Description:
+sets value of m_motionSmoothing AND applies changes in Steam/OpenVr
+*/
+
+void SteamVRTabController::setMotionSmoothing(bool value,
+	bool notify)
+{
+	if (m_motionSmoothing!= value)
+	{
+		m_motionSmoothing = value;
+		vr::VRSettings()->SetBool(vr::k_pch_SteamVR_Section,
+			vr::k_pch_SteamVR_MotionSmoothing_Bool,
+			m_motionSmoothing);
+		vr::VRSettings()->Sync();
+		if (notify)
+		{
+			emit motionSmoothingChanged(
+				m_motionSmoothing);
+		}
+	}
+}
+
+/*
+Name: initMotionSmoothing
+
+input: none
+output: none
+
+description: Gets the Value of Motion Smoothing from Steam/OpenVR.
+Sets the member variable of motion smoothing for UI
+Adds error to log if unable to find variable.
+
+OnError:
+default value of true for motion smoothing is initialized, if user has disabled motion smoothing on their end,
+they will have to toggle the variable twice to get it to re-sync.
+*/
+void SteamVRTabController::initMotionSmoothing() {
+	bool temporary = false;
+	vr::EVRSettingsError vrSettingsError;
+	temporary = vr::VRSettings()->GetBool(vr::k_pch_SteamVR_Section,
+		vr::k_pch_SteamVR_MotionSmoothing_Bool,
+		&vrSettingsError);
+	if (vrSettingsError != vr::VRSettingsError_None)
+	{
+		LOG(WARNING) << "Could not get MotionSmoothing State \""
+			<< vr::k_pch_SteamVR_MotionSmoothing_Bool << "\" setting: "
+			<< vr::VRSettings()->GetSettingsErrorNameFromEnum(
+				vrSettingsError);
+	}
+	vr::VRSettings()->Sync();
+	setMotionSmoothing(temporary, true);
+		
+
+}
+
 /*
 bool SteamVRTabController::allowInterleavedReprojection() const
 {
@@ -527,8 +599,7 @@ void SteamVRTabController::restartSteamVR()
 
 void SteamVRTabController::addSteamVRProfile( QString name,
                                               bool includeSupersampling,
-                                              bool includeSupersampleFiltering,
+                                              bool includeSupersampleFiltering)
-                                              bool includeReprojectionSettings )
 {
     SteamVRProfile* profile = nullptr;
     for ( auto& p : steamvrProfiles )

src/tabcontrollers/SteamVRTabController.h

@@ -45,6 +45,10 @@ class SteamVRTabController : public QObject
     Q_PROPERTY( bool forceReprojection READ forceReprojection WRITE
                     setForceReprojection NOTIFY forceReprojectionChanged )
 	*/
+
+	Q_PROPERTY(bool motionSmoothing READ motionSmoothing
+			WRITE setMotionSmoothing NOTIFY
+			motionSmoothingChanged)
     Q_PROPERTY( bool allowSupersampleFiltering READ allowSupersampleFiltering
                     WRITE setAllowSupersampleFiltering NOTIFY
                         allowSupersampleFilteringChanged )
@@ -58,8 +62,11 @@ private:
     //bool m_allowInterleavedReprojection = true;
     //bool m_allowAsyncReprojection = true;
     //bool m_forceReprojection = false;
+	bool m_motionSmoothing = true;
     bool m_allowSupersampleFiltering = true;
 
+	void initMotionSmoothing();
+
     std::vector<SteamVRProfile> steamvrProfiles;
 
     unsigned settingsUpdateCounter = 0;
@@ -75,6 +82,7 @@ public:
     //bool allowInterleavedReprojection() const;
     //bool allowAsyncReprojection() const;
     //bool forceReprojection() const;
+	bool motionSmoothing() const;
     bool allowSupersampleFiltering() const;
 
     void reloadSteamVRProfiles();
@@ -89,12 +97,12 @@ public slots:
     //void setAllowInterleavedReprojection( bool value, bool notify = true );
     //void setAllowAsyncReprojection( bool value, bool notify = true );
     //void setForceReprojection( bool value, bool notify = true );
+	void setMotionSmoothing(bool value, bool notify = true);
     void setAllowSupersampleFiltering( bool value, bool notify = true );
 
     void addSteamVRProfile( QString name,
                             bool includeSupersampling,
-                            bool includeSupersampleFiltering,
+                            bool includeSupersampleFiltering);
-                            bool includeReprojectionSettings );
     void applySteamVRProfile( unsigned index );
     void deleteSteamVRProfile( unsigned index );
 
@@ -107,6 +115,7 @@ signals:
     //void allowInterleavedReprojectionChanged( bool value );
     //void allowAsyncReprojectionChanged( bool value );
     //void forceReprojectionChanged( bool value );
+	void motionSmoothingChanged(bool value);
     void allowSupersampleFilteringChanged( bool value );
 
     void steamVRProfilesUpdated();