Update magic effects VFX immediately after effects update (bug #4828)

CHANGELOG.md

@@ -23,6 +23,7 @@
     Bug #4804: Particle system with the "Has Sizes = false" causes an exception
     Bug #4820: Spell absorption is broken
     Bug #4827: NiUVController is handled incorrectly
+    Bug #4828: Potion looping effects VFX are not shown for NPCs
     Feature #2229: Improve pathfinding AI
     Feature #3442: Default values for fallbacks from ini file
     Feature #3610: Option to invert X axis

apps/openmw/mwmechanics/actors.cpp

@@ -1355,6 +1355,14 @@ namespace MWMechanics
                     bool cellChanged = world->hasCellChanged();
                     MWWorld::Ptr actor = iter->first; // make a copy of the map key to avoid it being invalidated when the player teleports
                     updateActor(actor, duration);
+
+                    // Looping magic VFX update
+                    // Note: we need to do this before any of the animations are updated.
+                    // Reaching the text keys may trigger Hit / Spellcast (and as such, particles),
+                    // so updating VFX immediately after that would just remove the particle effects instantly.
+                    // There needs to be a magic effect update in between.
+                    ctrl->updateContinuousVfx();
+
                     if (!cellChanged && world->hasCellChanged())
                     {
                         return; // for now abort update of the old cell when cell changes by teleportation magic effect
@@ -1428,14 +1436,6 @@ namespace MWMechanics
             timerUpdateEquippedLight += duration;
             mTimerDisposeSummonsCorpses += duration;
 
-            // Looping magic VFX update
-            // Note: we need to do this before any of the animations are updated.
-            // Reaching the text keys may trigger Hit / Spellcast (and as such, particles),
-            // so updating VFX immediately after that would just remove the particle effects instantly.
-            // There needs to be a magic effect update in between.
-            for(PtrActorMap::iterator iter(mActors.begin()); iter != mActors.end(); ++iter)
-                iter->second->getCharacterController()->updateContinuousVfx();
-
             // Animation/movement update
             CharacterController* playerCharacter = nullptr;
             for(PtrActorMap::iterator iter(mActors.begin()); iter != mActors.end(); ++iter)