Add a sanity check on space drag distance per frame

Limits space drag to 100m per frame. This is to address a bug where universe offset openvr clamping triggering a reset might send the play back out of bounds because an active hand drag repositioned them back there (moving the user either 1000m or 40,000m in a single frame.

src/tabcontrollers/MoveCenterTabController.cpp

@@ -1323,6 +1323,11 @@ void MoveCenterTabController::reset()
     m_offsetY = 0.0f;
     m_offsetZ = 0.0f;
     m_rotation = 0;
+    m_lastControllerPosition[0] = 0.0f;
+    m_lastControllerPosition[1] = 0.0f;
+    m_lastControllerPosition[2] = 0.0f;
+    m_lastMoveHand = vr::TrackedControllerRole_Invalid;
+    m_lastRotateHand = vr::TrackedControllerRole_Invalid;
     applyChaperoneResetData();
     emit offsetXChanged( m_offsetX );
     emit offsetYChanged( m_offsetY );
@@ -2546,6 +2551,14 @@ void MoveCenterTabController::updateHandDrag(
 
         // offset is un-rotated coordinates
 
+        // prevent positional glitches from exceeding max openvr offset clamps.
+        // We do this by detecting a drag larger than 100m in a single frame.
+        if ( abs( diff[0] ) > 100.0 || abs( diff[1] ) > 100.0
+             || abs( diff[2] ) > 100.0 )
+        {
+            reset();
+        }
+
         // prevents updating if axis movement is locked
         if ( !m_lockXToggle )
         {