Refactor to reuse existing obstacle detection

apps/openmw/mwmechanics/aiwander.cpp

@@ -69,11 +69,7 @@ namespace MWMechanics
         // AiWander states
         AiWander::WanderState mState;
 
-        // Wandering near spawn logic
         bool mIsWanderingManually;
-        ESM::Pathgrid::Point mPreviousWanderingNearSpawnLocation;
-        int mStuckTimer;
-
         bool mCanWanderAlongPathGrid;
         
         unsigned short mIdleAnimation;
@@ -90,7 +86,6 @@ namespace MWMechanics
             mCell(NULL),
             mState(AiWander::Wander_ChooseAction),
             mIsWanderingManually(false),
-            mStuckTimer(0),
             mCanWanderAlongPathGrid(true),
             mIdleAnimation(0),
             mBadIdles()
@@ -222,14 +217,14 @@ namespace MWMechanics
         if (REACTION_INTERVAL <= lastReaction)
         {
             lastReaction = 0;
-            return reactionTimeActions(actor, storage, currentCell, cellChange, pos);
+            return reactionTimeActions(actor, storage, currentCell, cellChange, pos, duration);
         }
         else
             return false;
     }
 
     bool AiWander::reactionTimeActions(const MWWorld::Ptr& actor, AiWanderStorage& storage,
-        const MWWorld::CellStore*& currentCell, bool cellChange, ESM::Position& pos)
+        const MWWorld::CellStore*& currentCell, bool cellChange, ESM::Position& pos, float duration)
     {
         if (mDistance <= 0)
             storage.mCanWanderAlongPathGrid = false;
@@ -263,9 +258,9 @@ namespace MWMechanics
             storage.mCanWanderAlongPathGrid = false;
         }
 
-        // Detect obstacles if wandering manually
-        if (storage.mIsWanderingManually) {
-            detectManualWanderingObstacles(actor, storage);
+        // If Wandering manually and hit an obstacle, stop
+        if (storage.mIsWanderingManually && mObstacleCheck.check(actor, duration*10.0f, 2.5f)) {
+            stopWalking(actor, storage);
         }
 
         // Don't try to move if you are in a new cell (ie: positioncell command called) but still play idles.
@@ -348,10 +343,6 @@ namespace MWMechanics
 
     /*
      * Commands actor to walk to a random location near original spawn location.
-     *
-     * Creatures simply wander a certain distance from their starting location, while NPCs wander a scripted
-     * distance (mDistance) from the position where they started the wander package.
-     * http://www.uesp.net/wiki/Tes3Mod:AIWander
      */
     void AiWander::wanderNearStart(const MWWorld::Ptr &actor, AiWanderStorage &storage, int wanderDistance) {
         const ESM::Pathgrid::Point currentPosition = actor.getRefData().getPosition().pos;
@@ -366,32 +357,9 @@ namespace MWMechanics
 
         storage.mPathFinder.buildSyncedPath(currentPosition, destinationPosition, actor.getCell(), true);
         storage.mPathFinder.addPointToPath(destinationPosition);
-        storage.mPreviousWanderingNearSpawnLocation = currentPosition;
-        storage.mStuckTimer = 0;
         storage.setState(Wander_Walking, true);
     }
 
-    /*
-     * Detects if a manually wandering actor has spent too much time at one spot (stuck by an obstacle)
-     * and stops wandering when that occurs. Uses the unit's speed to help determine how long they should
-     * not be in one spot.
-     */
-    void AiWander::detectManualWanderingObstacles(const MWWorld::Ptr& actor, AiWanderStorage& storage) {
-        const ESM::Pathgrid::Point currentPosition = actor.getRefData().getPosition().pos;
-        const float actorSpeed = actor.getClass().getSpeed(actor);
-        const float minimumDistanceTraveled = actorSpeed / 5.0f;
-        if (distanceApart2d(storage.mPreviousWanderingNearSpawnLocation, currentPosition) < minimumDistanceTraveled) {
-            // Hit an obstacle and haven't moved much
-            if (++(storage.mStuckTimer) > 8) {
-                // Stuck too long, wander elsewhere
-                storage.setState(Wander_ChooseAction);
-                wanderNearStart(actor, storage, mDistance);
-            }
-        } else {
-            storage.mPreviousWanderingNearSpawnLocation = currentPosition;
-        }
-    }
-
     void AiWander::doPerFrameActionsForState(const MWWorld::Ptr& actor, float duration, AiWanderStorage& storage, ESM::Position& pos)
     {
         switch (storage.mState)

apps/openmw/mwmechanics/aiwander.hpp

@@ -91,11 +91,10 @@ namespace MWMechanics
             void onWalkingStatePerFrameActions(const MWWorld::Ptr& actor, float duration, AiWanderStorage& storage, ESM::Position& pos);
             void onChooseActionStatePerFrameActions(const MWWorld::Ptr& actor, AiWanderStorage& storage);
             bool reactionTimeActions(const MWWorld::Ptr& actor, AiWanderStorage& storage,
-                const MWWorld::CellStore*& currentCell, bool cellChange, ESM::Position& pos);
+                const MWWorld::CellStore*& currentCell, bool cellChange, ESM::Position& pos, float duration);
             bool isPackageCompleted(const MWWorld::Ptr& actor, AiWanderStorage& storage);
             void returnToStartLocation(const MWWorld::Ptr& actor, AiWanderStorage& storage, ESM::Position& pos);
             void wanderNearStart(const MWWorld::Ptr &actor, AiWanderStorage &storage, int wanderDistance);
-            void detectManualWanderingObstacles(const MWWorld::Ptr& actor, AiWanderStorage& storage);
 
             int mDistance; // how far the actor can wander from the spawn point
             int mDuration;
@@ -160,12 +159,6 @@ namespace MWMechanics
             static const std::string sIdleSelectToGroupName[GroupIndex_MaxIdle - GroupIndex_MinIdle + 1];
 
             static int OffsetToPreventOvercrowding();
-
-            float distanceApart2d(const ESM::Pathgrid::Point& first, const ESM::Pathgrid::Point& second) {
-                const float deltaX = second.mX - first.mX;
-                const float deltaY = second.mY - first.mY;
-                return std::sqrt(deltaX*deltaX + deltaY*deltaY);
-            }
     };
     
     

apps/openmw/mwmechanics/obstacle.cpp

@@ -115,13 +115,13 @@ namespace MWMechanics
      * u = how long to move sideways
      *
      */
-    bool ObstacleCheck::check(const MWWorld::Ptr& actor, float duration)
+    bool ObstacleCheck::check(const MWWorld::Ptr& actor, float duration, float scaleMinimumDistance)
     {
         const MWWorld::Class& cls = actor.getClass();
         ESM::Position pos = actor.getRefData().getPosition();
 
         if(mDistSameSpot == -1)
-            mDistSameSpot = DIST_SAME_SPOT * cls.getSpeed(actor);
+            mDistSameSpot = DIST_SAME_SPOT * cls.getSpeed(actor) * scaleMinimumDistance;
 
         float distSameSpot = mDistSameSpot * duration;
 

apps/openmw/mwmechanics/obstacle.hpp

@@ -36,7 +36,7 @@ namespace MWMechanics
 
             // Returns true if there is an obstacle and an evasive action
             // should be taken
-            bool check(const MWWorld::Ptr& actor, float duration);
+            bool check(const MWWorld::Ptr& actor, float duration, float scaleMinimumDistance = 1.0f);
 
             // change direction to try to fix "stuck" actor
             void takeEvasiveAction(MWMechanics::Movement& actorMovement);