[Client] Only apply interpolation when positions don't change too much

apps/openmw/mwmp/DedicatedActor.cpp

@@ -65,9 +65,12 @@ void DedicatedActor::move(float dt)
     ESM::Position refPos = ptr.getRefData().getPosition();
     MWBase::World *world = MWBase::Environment::get().getWorld();
 
+    // Apply interpolation only if the position hasn't changed too much from last time
+    bool shouldInterpolate = abs(position.pos[0] - refPos.pos[0]) < 4 && abs(position.pos[1] - refPos.pos[1]) < 4 && abs(position.pos[2] - refPos.pos[2]) < 4;
+
     // Don't apply linear interpolation if the DedicatedActor has just gone through a cell change, because
     // the interpolated position will be invalid, causing a slight hopping glitch
-    if (!hasChangedCell)
+    if (shouldInterpolate && !hasChangedCell)
     {
         static const int timeMultiplier = 15;
         osg::Vec3f lerp = Main::get().getMechanicsHelper()->getLinearInterpolation(refPos.asVec3(), position.asVec3(), dt * timeMultiplier);

apps/openmw/mwmp/DedicatedPlayer.cpp

@@ -94,6 +94,10 @@ void DedicatedPlayer::move(float dt)
     ESM::Position refPos = ptr.getRefData().getPosition();
     MWBase::World *world = MWBase::Environment::get().getWorld();
 
+    // Apply interpolation only if the position hasn't changed too much from last time
+    bool shouldInterpolate = abs(position.pos[0] - refPos.pos[0]) < 4 && abs(position.pos[1] - refPos.pos[1]) < 4 && abs(position.pos[2] - refPos.pos[2]) < 4;
+
+    if (shouldInterpolate)
     {
         static const int timeMultiplier = 15;
         osg::Vec3f lerp = Main::get().getMechanicsHelper()->getLinearInterpolation(refPos.asVec3(), position.asVec3(), dt * timeMultiplier);
@@ -103,6 +107,10 @@ void DedicatedPlayer::move(float dt)
 
         world->moveObject(ptr, refPos.pos[0], refPos.pos[1], refPos.pos[2]);
     }
+    else
+    {
+        world->moveObject(ptr, position.pos[0], position.pos[1], position.pos[2]);
+    }
 
     MWMechanics::Movement *move = &ptr.getClass().getMovementSettings(ptr);
     move->mPosition[0] = direction.pos[0];