do not reigger OnGrabStateUpdated and OnTouchStateUpdated at all when the hand mesh is not valid or visible and also some other extra measures to make sure even if they are triggered they won't affect anything

CHANGELOG.md

@@ -34,7 +34,7 @@ This is a minor release focusing mainly on bringing OpenXR-compatible hand track
 
 ### Fixed
 
-- Fixed a bug when the virtual hand inside the game is not visible but still have collisions with other objects inside the scene.
+- Fixed a bug when the virtual hand inside the game is not visible but still collides with other objects inside the scene, mistakenly triggering events like OnGrabStateUpdated and OnTouchStateUpdated.
 - Fix various wrong Kismet script names and their class exports.
 
 ### Changed

Source/SenseGlove/Private/SenseGlove/Components/SGVirtualHandComponent.cpp

@@ -616,14 +616,14 @@ void USGVirtualHandComponent::FImpl::UpdateVisibility()
         bGotMotionControllerData
         && MotionControllerData.bValid
         && MotionControllerData.DeviceVisualType == EXRVisualType::Hand;
-    const bool bIsHandVisible = Owner->GetVisibleFlag();
+    const bool bHandVisible = Owner->IsVisible();
     const bool bShouldBeVisibleWhenHandDataUnavailable = Owner->IsVisibleWhenHandDataUnavailable();
 
     bool bSetNewVisibility = false;
 
     if (bHandDataAvailable)
     {
-        if (bIsHandVisible)
+        if (bHandVisible)
         {
             bSetNewVisibility = false;
         }
@@ -634,7 +634,7 @@ void USGVirtualHandComponent::FImpl::UpdateVisibility()
     }
     else
     {
-        if (bIsHandVisible)
+        if (bHandVisible)
         {
             if (bShouldBeVisibleWhenHandDataUnavailable)
             {

Source/SenseGlove/Private/SenseGlove/GameFramework/SGPawn.cpp

@@ -725,11 +725,24 @@ void ASGPawn::OnLeftThumbFingertipGrabColliderOverlapBegins(
     (void) bFromSweep;
     (void) SweepResult;
 
-    if (USGGrabComponent::IsGrabbable(OtherActor))
+    if (!IsValid(LeftHandGrabState.Hand))
     {
-        LeftHandGrabState.ActorThumbCanGrab = OtherActor;
-        Pimpl->TriggerGrabStateUpdatedEvent(LeftHandGrabState);
+        return;
     }
+
+    const bool bHandVisible = LeftHandGrabState.Hand->IsVisible();
+    if (!bHandVisible)
+    {
+        return;
+    }
+
+    if (!USGGrabComponent::IsGrabbable(OtherActor))
+    {
+        return;
+    }
+
+    LeftHandGrabState.ActorThumbCanGrab = OtherActor;
+    Pimpl->TriggerGrabStateUpdatedEvent(LeftHandGrabState);
 }
 
 void ASGPawn::OnLeftThumbFingertipGrabColliderOverlapEnds(
@@ -742,11 +755,18 @@ void ASGPawn::OnLeftThumbFingertipGrabColliderOverlapEnds(
     (void) OtherComp;
     (void) OtherBodyIndex;
 
-    if (LeftHandGrabState.ActorThumbCanGrab == OtherActor)
+    if (!IsValid(LeftHandGrabState.Hand))
     {
-        LeftHandGrabState.ActorThumbCanGrab = nullptr;
-        Pimpl->TriggerGrabStateUpdatedEvent(LeftHandGrabState);
+        return;
     }
+
+    if (LeftHandGrabState.ActorThumbCanGrab != OtherActor)
+    {
+        return;
+    }
+
+    LeftHandGrabState.ActorThumbCanGrab = nullptr;
+    Pimpl->TriggerGrabStateUpdatedEvent(LeftHandGrabState);
 }
 
 void ASGPawn::OnLeftIndexFingertipGrabColliderOverlapBegins(
@@ -763,11 +783,24 @@ void ASGPawn::OnLeftIndexFingertipGrabColliderOverlapBegins(
     (void) bFromSweep;
     (void) SweepResult;
 
-    if (USGGrabComponent::IsGrabbable(OtherActor))
+    if (!IsValid(LeftHandGrabState.Hand))
     {
-        LeftHandGrabState.ActorIndexCanGrab = OtherActor;
-        Pimpl->TriggerGrabStateUpdatedEvent(LeftHandGrabState);
+        return;
     }
+
+    const bool bHandVisible = LeftHandGrabState.Hand->IsVisible();
+    if (!bHandVisible)
+    {
+        return;
+    }
+
+    if (!USGGrabComponent::IsGrabbable(OtherActor))
+    {
+        return;
+    }
+
+    LeftHandGrabState.ActorIndexCanGrab = OtherActor;
+    Pimpl->TriggerGrabStateUpdatedEvent(LeftHandGrabState);
 }
 
 void ASGPawn::OnLeftIndexFingertipGrabColliderOverlapEnds(
@@ -780,11 +813,18 @@ void ASGPawn::OnLeftIndexFingertipGrabColliderOverlapEnds(
     (void) OtherComp;
     (void) OtherBodyIndex;
 
-    if (LeftHandGrabState.ActorIndexCanGrab == OtherActor)
+    if (!IsValid(LeftHandGrabState.Hand))
     {
-        LeftHandGrabState.ActorIndexCanGrab = nullptr;
-        Pimpl->TriggerGrabStateUpdatedEvent(LeftHandGrabState);
+        return;
     }
+
+    if (LeftHandGrabState.ActorIndexCanGrab != OtherActor)
+    {
+        return;
+    }
+
+    LeftHandGrabState.ActorIndexCanGrab = nullptr;
+    Pimpl->TriggerGrabStateUpdatedEvent(LeftHandGrabState);
 }
 
 void ASGPawn::OnLeftMiddleFingertipGrabColliderOverlapBegins(
@@ -801,11 +841,24 @@ void ASGPawn::OnLeftMiddleFingertipGrabColliderOverlapBegins(
     (void) bFromSweep;
     (void) SweepResult;
 
-    if (USGGrabComponent::IsGrabbable(OtherActor))
+    if (!IsValid(LeftHandGrabState.Hand))
     {
-        LeftHandGrabState.ActorMiddleCanGrab = OtherActor;
-        Pimpl->TriggerGrabStateUpdatedEvent(LeftHandGrabState);
+        return;
     }
+
+    const bool bHandVisible = LeftHandGrabState.Hand->IsVisible();
+    if (!bHandVisible)
+    {
+        return;
+    }
+
+    if (!USGGrabComponent::IsGrabbable(OtherActor))
+    {
+        return;
+    }
+
+    LeftHandGrabState.ActorMiddleCanGrab = OtherActor;
+    Pimpl->TriggerGrabStateUpdatedEvent(LeftHandGrabState);
 }
 
 void ASGPawn::OnLeftMiddleFingertipGrabColliderOverlapEnds(
@@ -818,11 +871,18 @@ void ASGPawn::OnLeftMiddleFingertipGrabColliderOverlapEnds(
     (void) OtherComp;
     (void) OtherBodyIndex;
 
-    if (LeftHandGrabState.ActorMiddleCanGrab == OtherActor)
+    if (!IsValid(LeftHandGrabState.Hand))
     {
-        LeftHandGrabState.ActorMiddleCanGrab = nullptr;
-        Pimpl->TriggerGrabStateUpdatedEvent(LeftHandGrabState);
+        return;
     }
+
+    if (LeftHandGrabState.ActorMiddleCanGrab != OtherActor)
+    {
+        return;
+    }
+
+    LeftHandGrabState.ActorMiddleCanGrab = nullptr;
+    Pimpl->TriggerGrabStateUpdatedEvent(LeftHandGrabState);
 }
 
 void ASGPawn::OnLeftThumbFingertipTouchColliderOverlapBegins(
@@ -839,12 +899,25 @@ void ASGPawn::OnLeftThumbFingertipTouchColliderOverlapBegins(
     (void) bFromSweep;
     (void) SweepResult;
 
-    if (USGTouchComponent::IsTouchable(OtherActor))
+    if (!IsValid(LeftHandTouchState.Hand))
     {
-        LeftHandTouchState.ActorThumbTouching = OtherActor;
-        Pimpl->TriggerTouchStateUpdatedEvent(LeftHandTouchState);
-        Pimpl->TriggerBeginTouch(LeftHandTouchState.Hand, OtherActor);
+        return;
     }
+
+    const bool bHandVisible = LeftHandTouchState.Hand->IsVisible();
+    if (!bHandVisible)
+    {
+        return;
+    }
+
+    if (!USGTouchComponent::IsTouchable(OtherActor))
+    {
+        return;
+    }
+
+    LeftHandTouchState.ActorThumbTouching = OtherActor;
+    Pimpl->TriggerTouchStateUpdatedEvent(LeftHandTouchState);
+    Pimpl->TriggerBeginTouch(LeftHandTouchState.Hand, OtherActor);
 }
 
 void ASGPawn::OnLeftThumbFingertipTouchColliderOverlapEnds(
@@ -857,12 +930,19 @@ void ASGPawn::OnLeftThumbFingertipTouchColliderOverlapEnds(
     (void) OtherComp;
     (void) OtherBodyIndex;
 
-    if (LeftHandTouchState.ActorThumbTouching == OtherActor)
+    if (!IsValid(LeftHandTouchState.Hand))
     {
-        LeftHandTouchState.ActorThumbTouching = nullptr;
-        Pimpl->TriggerTouchStateUpdatedEvent(LeftHandTouchState);
-        Pimpl->TriggerEndTouch(LeftHandTouchState.Hand, OtherActor);
+        return;
     }
+
+    if (LeftHandTouchState.ActorThumbTouching != OtherActor)
+    {
+        return;
+    }
+
+    LeftHandTouchState.ActorThumbTouching = nullptr;
+    Pimpl->TriggerTouchStateUpdatedEvent(LeftHandTouchState);
+    Pimpl->TriggerEndTouch(LeftHandTouchState.Hand, OtherActor);
 }
 
 void ASGPawn::OnLeftIndexFingertipTouchColliderOverlapBegins(
@@ -879,12 +959,25 @@ void ASGPawn::OnLeftIndexFingertipTouchColliderOverlapBegins(
     (void) bFromSweep;
     (void) SweepResult;
 
-    if (USGTouchComponent::IsTouchable(OtherActor))
+    if (!IsValid(LeftHandTouchState.Hand))
     {
-        LeftHandTouchState.ActorIndexTouching = OtherActor;
-        Pimpl->TriggerTouchStateUpdatedEvent(LeftHandTouchState);
-        Pimpl->TriggerBeginTouch(LeftHandTouchState.Hand, OtherActor);
+        return;
     }
+
+    const bool bHandVisible = LeftHandTouchState.Hand->IsVisible();
+    if (!bHandVisible)
+    {
+        return;
+    }
+
+    if (!USGTouchComponent::IsTouchable(OtherActor))
+    {
+        return;
+    }
+
+    LeftHandTouchState.ActorIndexTouching = OtherActor;
+    Pimpl->TriggerTouchStateUpdatedEvent(LeftHandTouchState);
+    Pimpl->TriggerBeginTouch(LeftHandTouchState.Hand, OtherActor);
 }
 
 void ASGPawn::OnLeftIndexFingertipTouchColliderOverlapEnds(
@@ -897,12 +990,19 @@ void ASGPawn::OnLeftIndexFingertipTouchColliderOverlapEnds(
     (void) OtherComp;
     (void) OtherBodyIndex;
 
-    if (LeftHandTouchState.ActorIndexTouching == OtherActor)
+    if (!IsValid(LeftHandTouchState.Hand))
     {
-        LeftHandTouchState.ActorIndexTouching = nullptr;
-        Pimpl->TriggerTouchStateUpdatedEvent(LeftHandTouchState);
-        Pimpl->TriggerEndTouch(LeftHandTouchState.Hand, OtherActor);
+        return;
     }
+
+    if (LeftHandTouchState.ActorIndexTouching != OtherActor)
+    {
+        return;
+    }
+
+    LeftHandTouchState.ActorIndexTouching = nullptr;
+    Pimpl->TriggerTouchStateUpdatedEvent(LeftHandTouchState);
+    Pimpl->TriggerEndTouch(LeftHandTouchState.Hand, OtherActor);
 }
 
 void ASGPawn::OnLeftMiddleFingertipTouchColliderOverlapBegins(
@@ -919,12 +1019,25 @@ void ASGPawn::OnLeftMiddleFingertipTouchColliderOverlapBegins(
     (void) bFromSweep;
     (void) SweepResult;
 
-    if (USGTouchComponent::IsTouchable(OtherActor))
+    if (!IsValid(LeftHandTouchState.Hand))
     {
-        LeftHandTouchState.ActorMiddleTouching = OtherActor;
-        Pimpl->TriggerTouchStateUpdatedEvent(LeftHandTouchState);
-        Pimpl->TriggerBeginTouch(LeftHandTouchState.Hand, OtherActor);
+        return;
     }
+
+    const bool bHandVisible = LeftHandTouchState.Hand->IsVisible();
+    if (!bHandVisible)
+    {
+        return;
+    }
+
+    if (!USGTouchComponent::IsTouchable(OtherActor))
+    {
+        return;
+    }
+
+    LeftHandTouchState.ActorMiddleTouching = OtherActor;
+    Pimpl->TriggerTouchStateUpdatedEvent(LeftHandTouchState);
+    Pimpl->TriggerBeginTouch(LeftHandTouchState.Hand, OtherActor);
 }
 
 void ASGPawn::OnLeftMiddleFingertipTouchColliderOverlapEnds(
@@ -937,12 +1050,19 @@ void ASGPawn::OnLeftMiddleFingertipTouchColliderOverlapEnds(
     (void) OtherComp;
     (void) OtherBodyIndex;
 
-    if (LeftHandTouchState.ActorMiddleTouching == OtherActor)
+    if (!IsValid(LeftHandTouchState.Hand))
     {
-        LeftHandTouchState.ActorMiddleTouching = nullptr;
-        Pimpl->TriggerTouchStateUpdatedEvent(LeftHandTouchState);
-        Pimpl->TriggerEndTouch(LeftHandTouchState.Hand, OtherActor);
+        return;
     }
+
+    if (LeftHandTouchState.ActorMiddleTouching != OtherActor)
+    {
+        return;
+    }
+
+    LeftHandTouchState.ActorMiddleTouching = nullptr;
+    Pimpl->TriggerTouchStateUpdatedEvent(LeftHandTouchState);
+    Pimpl->TriggerEndTouch(LeftHandTouchState.Hand, OtherActor);
 }
 
 void ASGPawn::OnLeftRingFingertipTouchColliderOverlapBegins(
@@ -959,12 +1079,25 @@ void ASGPawn::OnLeftRingFingertipTouchColliderOverlapBegins(
     (void) bFromSweep;
     (void) SweepResult;
 
-    if (USGTouchComponent::IsTouchable(OtherActor))
+    if (!IsValid(LeftHandTouchState.Hand))
     {
-        LeftHandTouchState.ActorRingTouching = OtherActor;
-        Pimpl->TriggerTouchStateUpdatedEvent(LeftHandTouchState);
-        Pimpl->TriggerBeginTouch(LeftHandTouchState.Hand, OtherActor);
+        return;
     }
+
+    const bool bHandVisible = LeftHandTouchState.Hand->IsVisible();
+    if (!bHandVisible)
+    {
+        return;
+    }
+
+    if (!USGTouchComponent::IsTouchable(OtherActor))
+    {
+        return;
+    }
+
+    LeftHandTouchState.ActorRingTouching = OtherActor;
+    Pimpl->TriggerTouchStateUpdatedEvent(LeftHandTouchState);
+    Pimpl->TriggerBeginTouch(LeftHandTouchState.Hand, OtherActor);
 }
 
 void ASGPawn::OnLeftRingFingertipTouchColliderOverlapEnds(
@@ -977,12 +1110,19 @@ void ASGPawn::OnLeftRingFingertipTouchColliderOverlapEnds(
     (void) OtherComp;
     (void) OtherBodyIndex;
 
-    if (LeftHandTouchState.ActorRingTouching == OtherActor)
+    if (!IsValid(LeftHandTouchState.Hand))
     {
-        LeftHandTouchState.ActorRingTouching = nullptr;
-        Pimpl->TriggerTouchStateUpdatedEvent(LeftHandTouchState);
-        Pimpl->TriggerEndTouch(LeftHandTouchState.Hand, OtherActor);
+        return;
     }
+
+    if (LeftHandTouchState.ActorRingTouching != OtherActor)
+    {
+        return;
+    }
+
+    LeftHandTouchState.ActorRingTouching = nullptr;
+    Pimpl->TriggerTouchStateUpdatedEvent(LeftHandTouchState);
+    Pimpl->TriggerEndTouch(LeftHandTouchState.Hand, OtherActor);
 }
 
 void ASGPawn::OnLeftPinkyFingertipTouchColliderOverlapBegins(
@@ -999,12 +1139,25 @@ void ASGPawn::OnLeftPinkyFingertipTouchColliderOverlapBegins(
     (void) bFromSweep;
     (void) SweepResult;
 
-    if (USGTouchComponent::IsTouchable(OtherActor))
+    if (!IsValid(LeftHandTouchState.Hand))
     {
-        LeftHandTouchState.ActorPinkyTouching = OtherActor;
-        Pimpl->TriggerTouchStateUpdatedEvent(LeftHandTouchState);
-        Pimpl->TriggerBeginTouch(LeftHandTouchState.Hand, OtherActor);
+        return;
     }
+
+    const bool bHandVisible = LeftHandTouchState.Hand->IsVisible();
+    if (!bHandVisible)
+    {
+        return;
+    }
+
+    if (!USGTouchComponent::IsTouchable(OtherActor))
+    {
+        return;
+    }
+
+    LeftHandTouchState.ActorPinkyTouching = OtherActor;
+    Pimpl->TriggerTouchStateUpdatedEvent(LeftHandTouchState);
+    Pimpl->TriggerBeginTouch(LeftHandTouchState.Hand, OtherActor);
 }
 
 void ASGPawn::OnLeftPinkyFingertipTouchColliderOverlapEnds(
@@ -1017,12 +1170,19 @@ void ASGPawn::OnLeftPinkyFingertipTouchColliderOverlapEnds(
     (void) OtherComp;
     (void) OtherBodyIndex;
 
-    if (LeftHandTouchState.ActorPinkyTouching == OtherActor)
+    if (!IsValid(LeftHandTouchState.Hand))
     {
-        LeftHandTouchState.ActorPinkyTouching = nullptr;
-        Pimpl->TriggerTouchStateUpdatedEvent(LeftHandTouchState);
-        Pimpl->TriggerEndTouch(LeftHandTouchState.Hand, OtherActor);
+        return;
     }
+
+    if (LeftHandTouchState.ActorPinkyTouching != OtherActor)
+    {
+        return;
+    }
+
+    LeftHandTouchState.ActorPinkyTouching = nullptr;
+    Pimpl->TriggerTouchStateUpdatedEvent(LeftHandTouchState);
+    Pimpl->TriggerEndTouch(LeftHandTouchState.Hand, OtherActor);
 }
 
 void ASGPawn::OnRightThumbFingertipGrabColliderOverlapBegins(
@@ -1039,11 +1199,24 @@ void ASGPawn::OnRightThumbFingertipGrabColliderOverlapBegins(
     (void) bFromSweep;
     (void) SweepResult;
 
-    if (USGGrabComponent::IsGrabbable(OtherActor))
+    if (!IsValid(RightHandGrabState.Hand))
     {
-        RightHandGrabState.ActorThumbCanGrab = OtherActor;
-        Pimpl->TriggerGrabStateUpdatedEvent(RightHandGrabState);
+        return;
     }
+
+    const bool bHandVisible = RightHandGrabState.Hand->IsVisible();
+    if (!bHandVisible)
+    {
+        return;
+    }
+
+    if (!USGGrabComponent::IsGrabbable(OtherActor))
+    {
+        return;
+    }
+
+    RightHandGrabState.ActorThumbCanGrab = OtherActor;
+    Pimpl->TriggerGrabStateUpdatedEvent(RightHandGrabState);
 }
 
 void ASGPawn::OnRightThumbFingertipGrabColliderOverlapEnds(
@@ -1056,11 +1229,18 @@ void ASGPawn::OnRightThumbFingertipGrabColliderOverlapEnds(
     (void) OtherComp;
     (void) OtherBodyIndex;
 
-    if (RightHandGrabState.ActorThumbCanGrab == OtherActor)
+    if (!IsValid(RightHandGrabState.Hand))
     {
-        RightHandGrabState.ActorThumbCanGrab = nullptr;
-        Pimpl->TriggerGrabStateUpdatedEvent(RightHandGrabState);
+        return;
     }
+
+    if (RightHandGrabState.ActorThumbCanGrab != OtherActor)
+    {
+        return;
+    }
+
+    RightHandGrabState.ActorThumbCanGrab = nullptr;
+    Pimpl->TriggerGrabStateUpdatedEvent(RightHandGrabState);
 }
 
 void ASGPawn::OnRightIndexFingertipGrabColliderOverlapBegins(
@@ -1077,11 +1257,24 @@ void ASGPawn::OnRightIndexFingertipGrabColliderOverlapBegins(
     (void) bFromSweep;
     (void) SweepResult;
 
-    if (USGGrabComponent::IsGrabbable(OtherActor))
+    if (!IsValid(RightHandGrabState.Hand))
     {
-        RightHandGrabState.ActorIndexCanGrab = OtherActor;
-        Pimpl->TriggerGrabStateUpdatedEvent(RightHandGrabState);
+        return;
     }
+
+    const bool bHandVisible = RightHandGrabState.Hand->IsVisible();
+    if (!bHandVisible)
+    {
+        return;
+    }
+
+    if (!USGGrabComponent::IsGrabbable(OtherActor))
+    {
+        return;
+    }
+
+    RightHandGrabState.ActorIndexCanGrab = OtherActor;
+    Pimpl->TriggerGrabStateUpdatedEvent(RightHandGrabState);
 }
 
 void ASGPawn::OnRightIndexFingertipGrabColliderOverlapEnds(
@@ -1094,11 +1287,18 @@ void ASGPawn::OnRightIndexFingertipGrabColliderOverlapEnds(
     (void) OtherComp;
     (void) OtherBodyIndex;
 
-    if (RightHandGrabState.ActorThumbCanGrab == OtherActor)
+    if (!IsValid(RightHandGrabState.Hand))
     {
-        RightHandGrabState.ActorIndexCanGrab = nullptr;
-        Pimpl->TriggerGrabStateUpdatedEvent(RightHandGrabState);
+        return;
     }
+
+    if (RightHandGrabState.ActorThumbCanGrab != OtherActor)
+    {
+        return;
+    }
+
+    RightHandGrabState.ActorIndexCanGrab = nullptr;
+    Pimpl->TriggerGrabStateUpdatedEvent(RightHandGrabState);
 }
 
 void ASGPawn::OnRightMiddleFingertipGrabColliderOverlapBegins(
@@ -1115,11 +1315,24 @@ void ASGPawn::OnRightMiddleFingertipGrabColliderOverlapBegins(
     (void) bFromSweep;
     (void) SweepResult;
 
-    if (USGGrabComponent::IsGrabbable(OtherActor))
+    if (!IsValid(RightHandGrabState.Hand))
     {
-        RightHandGrabState.ActorMiddleCanGrab = OtherActor;
-        Pimpl->TriggerGrabStateUpdatedEvent(RightHandGrabState);
+        return;
     }
+
+    const bool bHandVisible = RightHandGrabState.Hand->IsVisible();
+    if (!bHandVisible)
+    {
+        return;
+    }
+
+    if (!USGGrabComponent::IsGrabbable(OtherActor))
+    {
+        return;
+    }
+
+    RightHandGrabState.ActorMiddleCanGrab = OtherActor;
+    Pimpl->TriggerGrabStateUpdatedEvent(RightHandGrabState);
 }
 
 void ASGPawn::OnRightMiddleFingertipGrabColliderOverlapEnds(
@@ -1132,11 +1345,18 @@ void ASGPawn::OnRightMiddleFingertipGrabColliderOverlapEnds(
     (void) OtherComp;
     (void) OtherBodyIndex;
 
-    if (RightHandGrabState.ActorMiddleCanGrab == OtherActor)
+    if (!IsValid(RightHandGrabState.Hand))
     {
-        RightHandGrabState.ActorMiddleCanGrab = nullptr;
-        Pimpl->TriggerGrabStateUpdatedEvent(RightHandGrabState);
+        return;
     }
+
+    if (RightHandGrabState.ActorMiddleCanGrab != OtherActor)
+    {
+        return;
+    }
+
+    RightHandGrabState.ActorMiddleCanGrab = nullptr;
+    Pimpl->TriggerGrabStateUpdatedEvent(RightHandGrabState);
 }
 
 void ASGPawn::OnRightThumbFingertipTouchColliderOverlapBegins(
@@ -1153,12 +1373,25 @@ void ASGPawn::OnRightThumbFingertipTouchColliderOverlapBegins(
     (void) bFromSweep;
     (void) SweepResult;
 
-    if (USGTouchComponent::IsTouchable(OtherActor))
+    if (!IsValid(RightHandTouchState.Hand))
     {
-        RightHandTouchState.ActorThumbTouching = OtherActor;
-        Pimpl->TriggerTouchStateUpdatedEvent(RightHandTouchState);
-        Pimpl->TriggerBeginTouch(RightHandTouchState.Hand, OtherActor);
+        return;
     }
+
+    const bool bHandVisible = RightHandTouchState.Hand->IsVisible();
+    if (!bHandVisible)
+    {
+        return;
+    }
+
+    if (!USGTouchComponent::IsTouchable(OtherActor))
+    {
+        return;
+    }
+
+    RightHandTouchState.ActorThumbTouching = OtherActor;
+    Pimpl->TriggerTouchStateUpdatedEvent(RightHandTouchState);
+    Pimpl->TriggerBeginTouch(RightHandTouchState.Hand, OtherActor);
 }
 
 void ASGPawn::OnRightThumbFingertipTouchColliderOverlapEnds(
@@ -1171,12 +1404,19 @@ void ASGPawn::OnRightThumbFingertipTouchColliderOverlapEnds(
     (void) OtherComp;
     (void) OtherBodyIndex;
 
-    if (RightHandTouchState.ActorThumbTouching == OtherActor)
+    if (!IsValid(RightHandTouchState.Hand))
     {
-        RightHandTouchState.ActorThumbTouching = nullptr;
-        Pimpl->TriggerTouchStateUpdatedEvent(RightHandTouchState);
-        Pimpl->TriggerEndTouch(RightHandTouchState.Hand, OtherActor);
+        return;
     }
+
+    if (RightHandTouchState.ActorThumbTouching != OtherActor)
+    {
+        return;
+    }
+
+    RightHandTouchState.ActorThumbTouching = nullptr;
+    Pimpl->TriggerTouchStateUpdatedEvent(RightHandTouchState);
+    Pimpl->TriggerEndTouch(RightHandTouchState.Hand, OtherActor);
 }
 
 void ASGPawn::OnRightIndexFingertipTouchColliderOverlapBegins(
@@ -1193,12 +1433,25 @@ void ASGPawn::OnRightIndexFingertipTouchColliderOverlapBegins(
     (void) bFromSweep;
     (void) SweepResult;
 
-    if (USGTouchComponent::IsTouchable(OtherActor))
+    if (!IsValid(RightHandTouchState.Hand))
     {
-        RightHandTouchState.ActorIndexTouching = OtherActor;
-        Pimpl->TriggerTouchStateUpdatedEvent(RightHandTouchState);
-        Pimpl->TriggerBeginTouch(RightHandTouchState.Hand, OtherActor);
+        return;
     }
+
+    const bool bHandVisible = RightHandTouchState.Hand->IsVisible();
+    if (!bHandVisible)
+    {
+        return;
+    }
+
+    if (!USGTouchComponent::IsTouchable(OtherActor))
+    {
+        return;
+    }
+
+    RightHandTouchState.ActorIndexTouching = OtherActor;
+    Pimpl->TriggerTouchStateUpdatedEvent(RightHandTouchState);
+    Pimpl->TriggerBeginTouch(RightHandTouchState.Hand, OtherActor);
 }
 
 void ASGPawn::OnRightIndexFingertipTouchColliderOverlapEnds(
@@ -1211,12 +1464,19 @@ void ASGPawn::OnRightIndexFingertipTouchColliderOverlapEnds(
     (void) OtherComp;
     (void) OtherBodyIndex;
 
-    if (RightHandTouchState.ActorIndexTouching == OtherActor)
+    if (!IsValid(RightHandTouchState.Hand))
     {
-        RightHandTouchState.ActorIndexTouching = nullptr;
-        Pimpl->TriggerTouchStateUpdatedEvent(RightHandTouchState);
-        Pimpl->TriggerEndTouch(RightHandTouchState.Hand, OtherActor);
+        return;
     }
+
+    if (RightHandTouchState.ActorIndexTouching != OtherActor)
+    {
+        return;
+    }
+
+    RightHandTouchState.ActorIndexTouching = nullptr;
+    Pimpl->TriggerTouchStateUpdatedEvent(RightHandTouchState);
+    Pimpl->TriggerEndTouch(RightHandTouchState.Hand, OtherActor);
 }
 
 void ASGPawn::OnRightMiddleFingertipTouchColliderOverlapBegins(
@@ -1233,12 +1493,25 @@ void ASGPawn::OnRightMiddleFingertipTouchColliderOverlapBegins(
     (void) bFromSweep;
     (void) SweepResult;
 
-    if (USGTouchComponent::IsTouchable(OtherActor))
+    if (!IsValid(RightHandTouchState.Hand))
     {
-        RightHandTouchState.ActorMiddleTouching = OtherActor;
-        Pimpl->TriggerTouchStateUpdatedEvent(RightHandTouchState);
-        Pimpl->TriggerBeginTouch(RightHandTouchState.Hand, OtherActor);
+        return;
     }
+
+    const bool bHandVisible = RightHandTouchState.Hand->IsVisible();
+    if (!bHandVisible)
+    {
+        return;
+    }
+
+    if (!USGTouchComponent::IsTouchable(OtherActor))
+    {
+        return;
+    }
+
+    RightHandTouchState.ActorMiddleTouching = OtherActor;
+    Pimpl->TriggerTouchStateUpdatedEvent(RightHandTouchState);
+    Pimpl->TriggerBeginTouch(RightHandTouchState.Hand, OtherActor);
 }
 
 void ASGPawn::OnRightMiddleFingertipTouchColliderOverlapEnds(
@@ -1251,12 +1524,19 @@ void ASGPawn::OnRightMiddleFingertipTouchColliderOverlapEnds(
     (void) OtherComp;
     (void) OtherBodyIndex;
 
-    if (RightHandTouchState.ActorMiddleTouching == OtherActor)
+    if (!IsValid(RightHandTouchState.Hand))
     {
-        RightHandTouchState.ActorMiddleTouching = nullptr;
-        Pimpl->TriggerTouchStateUpdatedEvent(RightHandTouchState);
-        Pimpl->TriggerEndTouch(RightHandTouchState.Hand, OtherActor);
+        return;
     }
+
+    if (RightHandTouchState.ActorMiddleTouching != OtherActor)
+    {
+        return;
+    }
+
+    RightHandTouchState.ActorMiddleTouching = nullptr;
+    Pimpl->TriggerTouchStateUpdatedEvent(RightHandTouchState);
+    Pimpl->TriggerEndTouch(RightHandTouchState.Hand, OtherActor);
 }
 
 void ASGPawn::OnRightRingFingertipTouchColliderOverlapBegins(
@@ -1273,12 +1553,25 @@ void ASGPawn::OnRightRingFingertipTouchColliderOverlapBegins(
     (void) bFromSweep;
     (void) SweepResult;
 
-    if (USGTouchComponent::IsTouchable(OtherActor))
+    if (!IsValid(RightHandTouchState.Hand))
     {
-        RightHandTouchState.ActorRingTouching = OtherActor;
-        Pimpl->TriggerTouchStateUpdatedEvent(RightHandTouchState);
-        Pimpl->TriggerBeginTouch(RightHandTouchState.Hand, OtherActor);
+        return;
     }
+
+    const bool bHandVisible = RightHandTouchState.Hand->IsVisible();
+    if (!bHandVisible)
+    {
+        return;
+    }
+
+    if (!USGTouchComponent::IsTouchable(OtherActor))
+    {
+        return;
+    }
+
+    RightHandTouchState.ActorRingTouching = OtherActor;
+    Pimpl->TriggerTouchStateUpdatedEvent(RightHandTouchState);
+    Pimpl->TriggerBeginTouch(RightHandTouchState.Hand, OtherActor);
 }
 
 void ASGPawn::OnRightRingFingertipTouchColliderOverlapEnds(
@@ -1291,12 +1584,19 @@ void ASGPawn::OnRightRingFingertipTouchColliderOverlapEnds(
     (void) OtherComp;
     (void) OtherBodyIndex;
 
-    if (RightHandTouchState.ActorRingTouching == OtherActor)
+    if (!IsValid(RightHandTouchState.Hand))
     {
-        RightHandTouchState.ActorRingTouching = nullptr;
-        Pimpl->TriggerTouchStateUpdatedEvent(RightHandTouchState);
-        Pimpl->TriggerEndTouch(RightHandTouchState.Hand, OtherActor);
+        return;
     }
+
+    if (RightHandTouchState.ActorRingTouching != OtherActor)
+    {
+        return;
+    }
+
+    RightHandTouchState.ActorRingTouching = nullptr;
+    Pimpl->TriggerTouchStateUpdatedEvent(RightHandTouchState);
+    Pimpl->TriggerEndTouch(RightHandTouchState.Hand, OtherActor);
 }
 
 void ASGPawn::OnRightPinkyFingertipTouchColliderOverlapBegins(
@@ -1313,12 +1613,25 @@ void ASGPawn::OnRightPinkyFingertipTouchColliderOverlapBegins(
     (void) bFromSweep;
     (void) SweepResult;
 
-    if (USGTouchComponent::IsTouchable(OtherActor))
+    if (!IsValid(RightHandTouchState.Hand))
     {
-        RightHandTouchState.ActorPinkyTouching = OtherActor;
-        Pimpl->TriggerTouchStateUpdatedEvent(RightHandTouchState);
-        Pimpl->TriggerBeginTouch(RightHandTouchState.Hand, OtherActor);
+        return;
     }
+
+    const bool bHandVisible = RightHandTouchState.Hand->IsVisible();
+    if (!bHandVisible)
+    {
+        return;
+    }
+
+    if (!USGTouchComponent::IsTouchable(OtherActor))
+    {
+        return;
+    }
+
+    RightHandTouchState.ActorPinkyTouching = OtherActor;
+    Pimpl->TriggerTouchStateUpdatedEvent(RightHandTouchState);
+    Pimpl->TriggerBeginTouch(RightHandTouchState.Hand, OtherActor);
 }
 
 void ASGPawn::OnRightPinkyFingertipTouchColliderOverlapEnds(
@@ -1331,34 +1644,51 @@ void ASGPawn::OnRightPinkyFingertipTouchColliderOverlapEnds(
     (void) OtherComp;
     (void) OtherBodyIndex;
 
-    if (RightHandTouchState.ActorPinkyTouching == OtherActor)
+    if (!IsValid(RightHandTouchState.Hand))
     {
-        RightHandTouchState.ActorPinkyTouching = nullptr;
-        Pimpl->TriggerTouchStateUpdatedEvent(RightHandTouchState);
-        Pimpl->TriggerEndTouch(RightHandTouchState.Hand, OtherActor);
+        return;
     }
+
+    if (RightHandTouchState.ActorPinkyTouching != OtherActor)
+    {
+        return;
+    }
+
+    RightHandTouchState.ActorPinkyTouching = nullptr;
+    Pimpl->TriggerTouchStateUpdatedEvent(RightHandTouchState);
+    Pimpl->TriggerEndTouch(RightHandTouchState.Hand, OtherActor);
 }
 
 bool ASGPawn::IsLeftHandGrabbing(AActor*& OutActor) const
 {
-    if (IsValid(LeftHandGrabState.GrabbedActor))
+    if (!IsValid(LeftHandGrabState.Hand))
     {
-        OutActor = LeftHandGrabState.GrabbedActor;
-        return true;
+        return false;
     }
 
-    return false;
+    if (!IsValid(LeftHandGrabState.GrabbedActor))
+    {
+        return false;
+    }
+
+    OutActor = LeftHandGrabState.GrabbedActor;
+    return true;
 }
 
 bool ASGPawn::IsRightHandGrabbing(AActor*& OutActor) const
 {
-    if (IsValid(RightHandGrabState.GrabbedActor))
+    if (!IsValid(RightHandGrabState.Hand))
     {
-        OutActor = RightHandGrabState.GrabbedActor;
-        return true;
+        return false;
     }
 
-    return false;
+    if (!IsValid(RightHandGrabState.GrabbedActor))
+    {
+        return false;
+    }
+
+    OutActor = RightHandGrabState.GrabbedActor;
+    return true;
 }
 
 bool ASGPawn::IsGrabbing(const USGVirtualHandComponent* Hand, AActor*& OutActor) const
@@ -1368,13 +1698,24 @@ bool ASGPawn::IsGrabbing(const USGVirtualHandComponent* Hand, AActor*& OutActor)
 
 void ASGPawn::Grab(USGVirtualHandComponent* Hand, AActor* Actor)
 {
+    if (!ensureAlwaysMsgf(IsValid(Hand), TEXT("%s"), TEXT("ERROR: invalid hand!")))
+    {
+        return;
+    }
+
+    const bool bHandVisible = Hand->IsVisible();
+    if (!bHandVisible)
+    {
+        return;
+    }
+
     if (!ensureAlwaysMsgf(IsValid(Actor), TEXT("%s"), TEXT("ERROR: invalid actor!")))
     {
         return;
     }
 
     const USGGrabComponent* GrabComponent{USGGrabComponent::GetGrabComponent(Actor)};
-    if (!GrabComponent)
+    if (!IsValid(GrabComponent))
     {
         return;
     }

Source/SenseGlove/Private/SenseGlove/GameFramework/SGPlayerController.cpp

@@ -266,6 +266,16 @@ void ASGPlayerController::BeginPlay()
                 return;
             }
 
+            const bool bHandVisible = GrabState.Hand->IsVisible();
+            if (!bHandVisible)
+            {
+                if (SGPawn->IsGrabbing(GrabState.Hand))
+                {
+                    SGPawn->Release(GrabState.Hand);
+                }
+                return;
+            }
+
             if (SGPawn->IsGrabbing(GrabState.Hand))
             {
                 if (!IsValid(GrabState.ActorThumbCanGrab) ||
@@ -287,6 +297,28 @@ void ASGPlayerController::BeginPlay()
     SGPawn->OnTouchStateUpdated().AddWeakLambda(
         this, [= SG_CAPTURE_THIS](const FSGTouchState& TouchState) -> void
         {
+            if (!IsValid(SGPawn))
+            {
+                return;
+            }
+
+            if (!IsValid(TouchState.Hand))
+            {
+                return;
+            }
+
+            const bool bHandVisible = TouchState.Hand->IsVisible();
+            if (!bHandVisible)
+            {
+                return;
+            }
+
+            const bool bGloveConnected = TouchState.Hand->IsGloveConnected();
+            if (!bGloveConnected)
+            {
+                return;
+            }
+
             Pimpl->UpdateHapticsFeedback(TouchState);
         });
 }
@@ -313,6 +345,12 @@ void ASGPlayerController::FImpl::UpdateHapticsFeedback(const FSGTouchState& Touc
         return;
     }
 
+    const bool bGloveConnected = Glove->IsConnected()
+    if (!bGloveConnected)
+    {
+        return;
+    }
+
     // Queue the Force-Feedback command...
     TArray<float> ForceFeedbackLevels{
         GetForceFeedbackLevels(
@@ -342,11 +380,19 @@ void ASGPlayerController::FImpl::UpdateHapticsFeedback(const FSGTouchState& Touc
     FTimerDelegate TouchVibrotactileStopHandler;
     TouchVibrotactileStopHandler.BindLambda([= SG_CAPTURE_THIS]()-> void
     {
-        if (IsValid(Glove))
+        if (!IsValid(Glove))
         {
-            Glove->QueueVibroLevels(VibrotactileOffCommand);
-            Glove->SendHaptics();
+            return;
         }
+
+        const bool bGloveConnected = Glove->IsConnected();
+        if (!bGloveConnected)
+        {
+            return;
+        }
+
+        Glove->QueueVibroLevels(VibrotactileOffCommand);
+        Glove->SendHaptics();
     });
 
     Owner->GetWorldTimerManager().SetTimer(