Set mCanWaterWalk and mOnGround when adding Actor to the scene.

mCanWaterWalk was set to false and updated during next frame's simulation
mOnGround is set to true but then was updated as part of the scene
loading logic.

apps/openmw/mwphysics/actor.cpp

@@ -19,8 +19,8 @@ namespace MWPhysics
 {
 
 
-Actor::Actor(const MWWorld::Ptr& ptr, const Resource::BulletShape* shape, PhysicsTaskScheduler* scheduler)
-  : mStandingOnPtr(nullptr), mCanWaterWalk(false), mWalkingOnWater(false)
+Actor::Actor(const MWWorld::Ptr& ptr, const Resource::BulletShape* shape, PhysicsTaskScheduler* scheduler, bool canWaterWalk)
+  : mStandingOnPtr(nullptr), mCanWaterWalk(canWaterWalk), mWalkingOnWater(false)
   , mCollisionObject(nullptr), mMeshTranslation(shape->mCollisionBox.center), mHalfExtents(shape->mCollisionBox.extents)
   , mVelocity(0,0,0), mStuckFrames(0), mLastStuckPosition{0, 0, 0}
   , mForce(0.f, 0.f, 0.f), mOnGround(true), mOnSlope(false)

apps/openmw/mwphysics/actor.hpp

@@ -27,7 +27,7 @@ namespace MWPhysics
     class Actor final : public PtrHolder
     {
     public:
-        Actor(const MWWorld::Ptr& ptr, const Resource::BulletShape* shape, PhysicsTaskScheduler* scheduler);
+        Actor(const MWWorld::Ptr& ptr, const Resource::BulletShape* shape, PhysicsTaskScheduler* scheduler, bool canWaterWalk);
         ~Actor() override;
 
         /**

apps/openmw/mwphysics/physicssystem.cpp

@@ -681,7 +681,15 @@ namespace MWPhysics
         if (!shape)
             return;
 
-        auto actor = std::make_shared<Actor>(ptr, shape, mTaskScheduler.get());
+        // check if Actor should spawn above water
+        const MWMechanics::MagicEffects& effects = ptr.getClass().getCreatureStats(ptr).getMagicEffects();
+        const bool canWaterWalk = effects.get(ESM::MagicEffect::WaterWalking).getMagnitude() > 0;
+
+        auto actor = std::make_shared<Actor>(ptr, shape, mTaskScheduler.get(), canWaterWalk);
+        
+        // check if Actor is on the ground or in the air
+        traceDown(ptr, ptr.getRefData().getPosition().asVec3(), 10.f);
+
         mActors.emplace(ptr, std::move(actor));
     }
 

apps/openmw/mwworld/scene.cpp

@@ -446,12 +446,6 @@ namespace MWWorld
 
                 const auto player = MWBase::Environment::get().getWorld()->getPlayerPtr();
 
-                // By default the player is grounded, with the scene fully loaded, we validate and correct this.
-                if (player.mCell == cell) // Only run once, during initial cell load.
-                {
-                    mPhysics->traceDown(player, player.getRefData().getPosition().asVec3(), 10.f);
-                }
-
                 navigator->update(player.getRefData().getPosition().asVec3());
 
                 if (!cell->isExterior() && !(cell->getCell()->mData.mFlags & ESM::Cell::QuasiEx))