Define default actor half extents in settings

Player's half extents may change over time when wolfskin model is used for
example. Having it in settings is a more presistent approach.

apps/openmw/mwworld/worldimp.cpp

@@ -135,7 +135,9 @@ namespace MWWorld
     : mResourceSystem(resourceSystem), mLocalScripts (mStore),
       mCells (mStore, mEsm), mSky (true),
       mGodMode(false), mScriptsEnabled(true), mDiscardMovements(true), mContentFiles (contentFiles),
-      mUserDataPath(userDataPath), mShouldUpdateNavigator(false),
+      mUserDataPath(userDataPath),
+      mDefaultHalfExtents(Settings::Manager::getVector3("default actor pathfind half extents", "Game")),
+      mShouldUpdateNavigator(false),
       mActivationDistanceOverride (activationDistanceOverride),
       mStartCell(startCell), mDistanceToFacedObject(-1.f), mTeleportEnabled(true),
       mLevitationEnabled(true), mGoToJail(false), mDaysInPrison(0),
@@ -2471,7 +2473,6 @@ namespace MWWorld
 
         applyLoopingParticles(player);
 
-        mDefaultHalfExtents = mPhysics->getOriginalHalfExtents(getPlayerPtr());
         mNavigator->addAgent(getPathfindingHalfExtents(getPlayerConstPtr()));
     }
 

docs/source/reference/modding/settings/game.rst

@@ -455,3 +455,12 @@ If disabled actors without the ability to swim will not follow other actors to t
     Has effect only when Navigator is enabled.
 
 This setting can be controlled in Advanced tab of the launcher.
+
+default actor pathfind half extents
+-----------------------------------
+
+:Type:		3D vector floating point
+:Range:		All components > 0
+:Default:	29.27999496459961 28.479997634887695 66.5
+
+Actor half extents used for exterior cells to generate navmesh.

files/settings-default.cfg

@@ -373,6 +373,9 @@ graphic herbalism = true
 # (true, false)
 allow actors to follow over water surface = true
 
+# Default size of actor for navmesh generation
+default actor pathfind half extents = 29.27999496459961 28.479997634887695 66.5
+
 [General]
 
 # Anisotropy reduces distortion in textures at low angles (e.g. 0 to 16).