Assets/Scenes/MainGameWithAIFixed.shade

@@ -8599,6 +8599,7 @@
       Arm Length: 1
       Look At Camera Origin: true
       Target Offset: {x: 0, y: 0, z: 0}
+      Camera Collision: false
       IsActive: true
   Scripts:
     - Type: SHADE_Scripting.ThirdPersonCamera
@@ -8640,7 +8641,7 @@
   Components:
     Transform Component:
       Translate: {x: 2.70000005, y: 0.100000001, z: -2}
-      Rotate: {x: -0, y: 0, z: -0}
+      Rotate: {x: -0, y: -2.09439516, z: -0}
       Scale: {x: 1, y: 1, z: 1}
       IsActive: true
     Renderable Component:
@@ -8665,7 +8666,7 @@
       Colliders:
         - Is Trigger: false
           Type: Box
-          Half Extents: {x: 1, y: 1.79999995, z: 0.400000006}
+          Half Extents: {x: 0.400000006, y: 1.79999995, z: 0.400000006}
           Friction: 0.400000006
           Bounciness: 0
           Density: 1

Assets/Scripts/AIBehaviour/BehaviourTree/Core/BehaviourTree.cs

@@ -66,9 +66,17 @@ namespace SHADE_Scripting.AIBehaviour.BehaviourTree
     //Getters and setters for the blackboard
     public object GetData(string key)
     {
+      //Debug.Log("Getting Data " + key);
       object outData = null;
-      if (blackboard.TryGetValue(key, out outData)) return outData;
-      else return outData;
+      if (blackboard.TryGetValue(key, out outData))
+      {
+        return outData;
+      }
+      else
+      {
+        //Debug.LogError("Cannot retrieve data " + key);
+        return outData;
+      }
     }
     public void SetData(string key, object data)
     {

Assets/Scripts/AIBehaviour/Implemented/Homeowner1.cs

@@ -84,17 +84,55 @@ public partial class Homeowner1 : BehaviourTree
     _events = new Homeowner1Events(this);
     events.Initialise();
 
-    //Initialise the waypoints here
-    if (waypointsPool)
+    //(25 Nov) DO NOT Initialise the data here
+    /*if (waypointsPool)
     {
       waypoints = (List<GameObject>)waypointsPool.GetChildren();
       SetData("waypoints", waypoints);
     }
+    SetData("transform", GetComponent<Transform>());
+    SetData("rigidBody", GetComponent<RigidBody>());
+    SetData("eyeOffset", eyeOffset);
+    SetData("sightDistance", sightDistance);
+    SetData("patrolSpeed", patrolSpeed);
+    SetData("chaseSpeed", chaseSpeed);
+    SetData("turningSpeed", turningSpeed);
+    SetData("distanceToCapture", distanceToCapture);
+    SetData("baseCaptureTime", captureTime);*/
   }
 
   //Called every tick
   protected override void Tick()
   {
+    //Debug.Log("Ticking");
+    //Update data
+    if (GetData("waypoints") == null)
+    {
+      if (waypointsPool != GameObject.Null)
+        SetData("waypoints", (List<GameObject>)waypointsPool.GetChildren());
+      else
+        Debug.LogError("No waypoints, no AI");
+    }
+    if (GetData("transform") == null)
+      SetData("transform", GetComponent<Transform>());
+    if (GetData("rigidBody") == null)
+      SetData("rigidBody", GetComponent<RigidBody>());
+    if (GetData("eyeOffset") == null || (Vector3)GetData("eyeOffset") != eyeOffset)
+      SetData("eyeOffset", eyeOffset);
+    if (GetData("sightDistance") == null || (float)GetData("sightDistance") != sightDistance)
+      SetData("sightDistance", sightDistance);
+    if (GetData("patrolSpeed") == null || (float)GetData("patrolSpeed") != patrolSpeed)
+      SetData("patrolSpeed", patrolSpeed);
+    if (GetData("chaseSpeed") == null || (float)GetData("chaseSpeed") != chaseSpeed)
+      SetData("chaseSpeed", chaseSpeed);
+    if (GetData("turningSpeed") == null || (float)GetData("turningSpeed") != turningSpeed)
+      SetData("turningSpeed", turningSpeed);
+    if (GetData("distanceToCapture") == null || (float)GetData("distanceToCapture") != distanceToCapture)
+      SetData("distanceToCapture", distanceToCapture);
+    if (GetData("baseCaptureTime") == null || (float)GetData("baseCaptureTime") != captureTime)
+      SetData("baseCaptureTime", captureTime);
+
+
     events.Tick();
 
     //Footsteps SFX, move them somewhere else soon
@@ -103,9 +141,10 @@ public partial class Homeowner1 : BehaviourTree
     footstepTimeRemaining -= velocity * Time.DeltaTimeF;
     if (footstepTimeRemaining < 0.0f)
     {
-      Debug.Log("AI Play Footstep SFX");
+      Audio.PlaySFXOnce2D("event:/Homeowner/homeowner_footsteps");
       footstepTimeRemaining = footstepSFXIntervalMultiplier;
     }
+    //Debug.Log("Ticked");
   }
 
   //Define the behaviour tree here
@@ -113,20 +152,22 @@ public partial class Homeowner1 : BehaviourTree
   //The tree is called from the root every tick
   protected override BehaviourTreeNode CreateTree()
   {
+    //Debug.Log("Creating Tree");
     //Start from the root, structure it like this to make it look like a tree
     BehaviourTreeNode root = new BehaviourTreeSelector("Root", new List<BehaviourTreeNode>
     {
       new BehaviourTreeSequence("Alerted", new List<BehaviourTreeNode>
       {
-        new LeafSearch("SearchFOV", GetComponent<Transform>(), eyeOffset, sightDistance),
+        new LeafSearch("SearchFOV"),
         new BehaviourTreeSequence("CatchPlayer", new List<BehaviourTreeNode>
         {
-          new LeafChase("Chasing", GetComponent<Transform>(), GetComponent<RigidBody>(), chaseSpeed, turningSpeed, distanceToCapture, captureTime),
-          new LeafAttack("Attacking", GameObject.Find("Player").GetValueOrDefault())
+          new LeafChase("Chasing"),
+          new LeafAttack("Attacking")
         })
       }),
-      new LeafPatrol("Patrol", GetComponent<Transform>(), patrolSpeed, turningSpeed, GetComponent<RigidBody>())
+      new LeafPatrol("Patrol")
     });
+    //Debug.Log("Tree Created");
     return root;
   }
 }

Assets/Scripts/AIBehaviour/Implemented/LeafNodes/LeafAttack.cs

@@ -21,16 +21,40 @@ using System.Threading.Tasks;
 //VARIABLES
 public partial class LeafAttack : BehaviourTreeNode
 {
-  //Holds the player game object
+  //Holds the player game object that is to be targeted
   private GameObject player;
 }
 
 //FUNCTIONS
 public partial class LeafAttack : BehaviourTreeNode
 {
-  public LeafAttack(string name, GameObject p) : base (name)
+  public LeafAttack(string name) : base (name)
   {
-    player = p;
+    //Debug.Log("LeafAttack ctor");
+  }
+
+  //Helper, find the nearest unobstructed waypoint to return to when chase is over
+  public void reevaluateWaypoint()
+  {
+    List<GameObject> waypoints = (List<GameObject>)GetNodeData("waypoints");
+    Transform transform = (Transform)GetNodeData("transform");
+
+    if (waypoints == null || transform == null)
+    {
+      SetNodeData("currentWaypointIndex", 0);
+      return;
+    }
+
+    int nearestWaypointIndex = 0;
+    for (int i = 0; i < waypoints.Count; ++i)
+    {
+      if ((transform.GlobalPosition - waypoints[i].GetComponent<Transform>().GlobalPosition).GetSqrMagnitude() <
+        (transform.GlobalPosition - waypoints[nearestWaypointIndex].GetComponent<Transform>().GlobalPosition).GetSqrMagnitude())
+      {
+        nearestWaypointIndex = i;
+      }
+    }
+    SetNodeData("currentWaypointIndex", nearestWaypointIndex);
   }
 
   public override BehaviourTreeNodeStatus Evaluate()
@@ -40,20 +64,36 @@ public partial class LeafAttack : BehaviourTreeNode
 
     onEnter(BehaviourTreeNodeStatus.RUNNING);
 
-		//Succeed when stand in hurt box for long enough
-		object timeObj = GetNodeData("captureTimeLeft");
-    if (timeObj == null)
+    //Get Data
+    float? captureTime;
+    if (GetNodeData("captureTimeLeft") == null)
     {
-      return BehaviourTreeNodeStatus.FAILURE;
+      status = BehaviourTreeNodeStatus.FAILURE;
+      onExit(BehaviourTreeNodeStatus.FAILURE);
+      return status;
     }
+    else
+      captureTime = (float)GetNodeData("captureTimeLeft");
 
-		float captureTime = (float)GetNodeData("captureTimeLeft");
+    if (GameObject.Find("Player") == null)
+    {
+      status = BehaviourTreeNodeStatus.FAILURE;
+      onExit(BehaviourTreeNodeStatus.FAILURE);
+      return status;
+    }
+    else
+      player = GameObject.Find("Player").GetValueOrDefault();
+
+    //Succeed when stand in hurt box for long enough
+    //Debug.Log("Attempting to get blackboard data");
+    //Debug.Log("Got blackboard data");
     captureTime -= Time.DeltaTimeF;
     SetNodeData("captureTimeLeft", captureTime);
     //Debug.Log(captureTime.ToString());
     if (captureTime <= 0.0f)
     {
       //Catch player when in range for long enough
+      //Debug.Log("Success: Caught");
       player.GetScript<PlayerController>().currentState = PlayerController.RaccoonStates.CAUGHT;
       status = BehaviourTreeNodeStatus.SUCCESS;
       onExit(BehaviourTreeNodeStatus.SUCCESS);
@@ -61,8 +101,7 @@ public partial class LeafAttack : BehaviourTreeNode
     }
     
     //Return running if not success
-
-    //Debug.Log("Success: Caught");
+    //Debug.Log("Running: About to capture in " + captureTimeLeft);
     status = BehaviourTreeNodeStatus.RUNNING;
     onExit(BehaviourTreeNodeStatus.RUNNING);
     return status;

Assets/Scripts/AIBehaviour/Implemented/LeafNodes/LeafChase.cs

@@ -24,9 +24,9 @@ public partial class LeafChase : BehaviourTreeNode
   private Transform transform;
   private RigidBody rb;
   private float chaseSpeed;
-  private float turnSpeed;
+  private float turningSpeed;
   private float captureDistance;
-  private float captureTime;
+  private float baseCaptureTime;
 }
 
 //FUNCTIONS
@@ -34,29 +34,69 @@ public partial class LeafChase : BehaviourTreeNode
 {
   //Despite inheriting from BehaviourTreeNode, we don't have children to this node,
   //and hence we don't need to inherit its constructors
-  public LeafChase(string name, Transform t, RigidBody rb, float cSpd, float tSpd, float capDist, float capTime) : base (name)
+  public LeafChase(string name) : base (name)
   {
-    transform = t;
-    this.rb = rb;
-    chaseSpeed = cSpd;
-    turnSpeed = tSpd;
-    captureDistance = capDist;
-    captureTime = capTime;
+    //Debug.Log("LeafChase ctor");
+  }
+
+  //Helper, find which waypoint player is closest to
+  private void determinePlayerWaypoint()
+  {
+    List<GameObject> waypoints = (List<GameObject>)GetNodeData("waypoints");
+    Transform target = (Transform)GetNodeData("target");
+    if (waypoints == null || target == null)
+    {
+      return;
+    }
+
+    int nearestWaypointIndex = 0;
+    for (int i = 0; i < waypoints.Count; ++i)
+    {
+      if ((target.GlobalPosition - waypoints[i].GetComponent<Transform>().GlobalPosition).GetSqrMagnitude() <
+        (target.GlobalPosition - waypoints[nearestWaypointIndex].GetComponent<Transform>().GlobalPosition).GetSqrMagnitude())
+      {
+        nearestWaypointIndex = i;
+      }
+    }
+    //Debug.Log("Player is nearest " + nearestWaypointIndex);
+    //Debug.Log("I'm at " + (int)GetNodeData("currentWaypointIndex"));
+    SetNodeData("playerLastSightedWaypointIndex", nearestWaypointIndex);
   }
 
   public override BehaviourTreeNodeStatus Evaluate()
   {
     //Debug.LogWarning("LeafChase");
 
+    onEnter(BehaviourTreeNodeStatus.RUNNING);
+
+    //Get Data
+    if (GetNodeData("transform") == null ||
+        GetNodeData("rigidBody") == null ||
+        GetNodeData("turningSpeed") == null ||
+        GetNodeData("chaseSpeed") == null ||
+        GetNodeData("distanceToCapture") == null ||
+        GetNodeData("baseCaptureTime") == null)
+    {
+      status = BehaviourTreeNodeStatus.FAILURE;
+      onExit(BehaviourTreeNodeStatus.FAILURE);
+      return status;
+    }
+    else
+    {
+      transform = (Transform)GetNodeData("transform");
+      rb = (RigidBody)GetNodeData("rigidBody");
+      chaseSpeed = (float)GetNodeData("chaseSpeed");
+      turningSpeed = (float)GetNodeData("turningSpeed");
+      captureDistance = (float)GetNodeData("distanceToCapture");
+      baseCaptureTime = (float)GetNodeData("baseCaptureTime");
+    }
+
     //Fail if no target in blackboard
     if (GetNodeData("target") == null)
     {
       //Debug.Log("Failure: No target in blackboard");
       return BehaviourTreeNodeStatus.FAILURE;
     }
-
-    onEnter(BehaviourTreeNodeStatus.RUNNING);
-
     Transform target = (Transform)GetNodeData("target");
 
     Vector3 normalisedDifference = target.GlobalPosition - transform.GlobalPosition;
@@ -71,7 +111,7 @@ public partial class LeafChase : BehaviourTreeNode
 
       if (GetNodeData("isAlert") != null && (bool)GetNodeData("isAlert") == true)
       {
-        Debug.Log("AI play unalert hmm");
+        Audio.PlaySFXOnce2D("event:/Homeowner/humming");
       }
       SetNodeData("isAlert", false);
 
@@ -93,13 +133,32 @@ public partial class LeafChase : BehaviourTreeNode
     {
       //Debug.Log("Running: Chasing");
       Quaternion targetRotation = Quaternion.LookRotation(normalisedDifference, new Vector3(0.0f, 1.0f, 0.0f));
-      transform.LocalRotation = Quaternion.Slerp(transform.LocalRotation, targetRotation, turnSpeed * Time.DeltaTimeF);
+      transform.LocalRotation = Quaternion.Slerp(transform.LocalRotation, targetRotation, turningSpeed * Time.DeltaTimeF);
+
+
+      //Determine the player's nearest waypoint as long as the AI can see the player
+      //Head towards that waypoint in an attempt to chase the player
+      determinePlayerWaypoint();
 
       //TODO delete this when original intendd code above works with velocity being limited correctly
-      rb.LinearVelocity = normalisedDifference * chaseSpeed;
+      //Only chase the player directly if the player's waypoint matches the AI's own
+      if (GetNodeData("currentWaypointIndex") != null && GetNodeData("playerLastSightedWaypointIndex") != null)
+      {
+        if ((int)GetNodeData("currentWaypointIndex") == (int)GetNodeData("playerLastSightedWaypointIndex"))
+        {
+          //Debug.Log("Waypoint indicees matching. Chasing directly");
+          rb.LinearVelocity = normalisedDifference * chaseSpeed;
+        }
+        else
+        {
+          status = BehaviourTreeNodeStatus.FAILURE;
+          onExit(BehaviourTreeNodeStatus.FAILURE);
+          return BehaviourTreeNodeStatus.FAILURE;
+        }
+      }
 
       //Reset capture timing to base
-      SetNodeData("captureTimeLeft", captureTime);
+      SetNodeData("captureTimeLeft", baseCaptureTime);
 
       //Not capturing, don't play SFX
       SetNodeData("isCapturing", false);
@@ -114,12 +173,12 @@ public partial class LeafChase : BehaviourTreeNode
       //Debug.Log("Success: Near enough. Begin attack");
       //Look at the correct direction
       Quaternion targetRotation = Quaternion.LookRotation(normalisedDifference, new Vector3(0.0f, 1.0f, 0.0f));
-      transform.LocalRotation = Quaternion.Slerp(transform.LocalRotation, targetRotation, turnSpeed * Time.DeltaTimeF);
+      transform.LocalRotation = Quaternion.Slerp(transform.LocalRotation, targetRotation, turningSpeed * Time.DeltaTimeF);
 
       //Play SFX
       if (GetNodeData("isCapturing") != null && (bool)GetNodeData("isCapturing") == false)
       {
-        Debug.Log("AI Play capturing SFX");
+        //Debug.Log("AI Play capturing SFX");
       }
       SetNodeData("isCapturing", true);
 

Assets/Scripts/AIBehaviour/Implemented/LeafNodes/LeafPatrol.cs

@@ -22,13 +22,15 @@ public partial class LeafPatrol : BehaviourTreeNode
 {
   //Waypoints and movement
   private Transform transform;
-  private List<GameObject> waypoints;
+  private List<GameObject>? waypoints;
   private RigidBody rb;
   private float patrolSpeed;
+  private float chaseSpeed;
   private float turningSpeed;
   private float retreatTimer = 0.0f;
   private int currentWaypointIndex = 0;
   private bool retreatState = false;
+  private bool goingForwards = true;
 
   //Small delays between waypoints
   private bool isWaiting = false;
@@ -42,13 +44,8 @@ public partial class LeafPatrol : BehaviourTreeNode
   //Constructor, establish values here
   //Despite inheriting from BehaviourTreeNode, we don't have children to this
   //node, and hence we do not need to inherit its constructors
-  public LeafPatrol(string name, Transform t, float patrolSpeed, float turnSpeed, RigidBody rb) : base(name)
+  public LeafPatrol(string name) : base(name)
   {
-    transform = t;
-    this.patrolSpeed = patrolSpeed;
-    turningSpeed = turnSpeed;
-    this.rb = rb;
-
     currentWaypointIndex = 0;
   }
 
@@ -58,7 +55,28 @@ public partial class LeafPatrol : BehaviourTreeNode
   {
     //Debug.LogWarning("LeafPatrol");
     onEnter(BehaviourTreeNodeStatus.RUNNING);
-    if(GetNodeData("currentWaypointIndex") == null)
+
+    //Get data
+    if (GetNodeData("transform") == null ||
+        GetNodeData("patrolSpeed") == null ||
+        GetNodeData("chaseSpeed") == null ||
+        GetNodeData("turningSpeed") == null ||
+        GetNodeData("rigidBody") == null)
+    {
+      status = BehaviourTreeNodeStatus.FAILURE;
+      onExit(BehaviourTreeNodeStatus.FAILURE);
+      return status;
+    }
+    else
+    {
+      transform = (Transform)GetNodeData("transform");
+      patrolSpeed = (float)GetNodeData("patrolSpeed");
+      chaseSpeed = (float)GetNodeData("chaseSpeed");
+      turningSpeed = (float)GetNodeData("turningSpeed");
+      rb = (RigidBody)GetNodeData("rigidBody");
+    }
+
+    if (GetNodeData("currentWaypointIndex") == null)
     {
       SetNodeData("currentWaypointIndex", 0);
     }
@@ -77,38 +95,90 @@ public partial class LeafPatrol : BehaviourTreeNode
     //Waiting, do not move
     if (GetNodeData("isWaiting") != null)
     {
-      waitCounter = 0.0f;
+      //Only wait to change waypoints if not alert
+      if (GetNodeData("isAlert") != null && !(bool)GetNodeData("isAlert"))
+        waitCounter = 0.0f;
+
       isWaiting = true;
       ClearNodeData("isWaiting");
       return;
     }
-
-    object waypoint = GetNodeData("waypoints");
-    if (waypoint == null)
+    waypoints = (List<GameObject>)GetNodeData("waypoints");
+    if (waypoints == null)
     {
       return;
     }
-
-		waypoints = (List<GameObject>)waypoint;
     Vector3 targetPosition = waypoints[currentWaypointIndex].GetComponent<Transform>().GlobalPosition;
-
     //Reach waypoint by X and Z being near enough
     //Do not consider Y of waypoints yet
     Vector3 remainingDistance = targetPosition - transform.GlobalPosition;
     remainingDistance.y = 0.0f;
-
     //Reached waypoint, cycle
     if (remainingDistance.GetSqrMagnitude() < 0.1f)
     {
+      //If alert, may reverse
+      if (GetNodeData("isAlert") != null && (bool)GetNodeData("isAlert"))
+      {
+        //If alert, may reverse if it's closer to the player
+        if (GetNodeData("playerLastSightedWaypointIndex") != null)
+        {
+          int playerWaypoint = (int)GetNodeData("playerLastSightedWaypointIndex");
+          int forwardDistance = 0;
+          int backDistance = 0;
+          if (playerWaypoint < currentWaypointIndex)
+          {
+            //Player waypoint is behind current waypoint
+            forwardDistance = playerWaypoint + waypoints.Count() - currentWaypointIndex;
+            backDistance = currentWaypointIndex - playerWaypoint;
+          }
+          else
+          {
+            //Player waypoint is ahead of current waypoint (or same)
+            forwardDistance = playerWaypoint - currentWaypointIndex;
+            backDistance = currentWaypointIndex + waypoints.Count() - playerWaypoint;
+          }
+          
+          if (backDistance < forwardDistance)
+          {
+            //Go backwards
+            goingForwards = false;
+            
+          }
+          else
+          {
+            //Go forward
+            goingForwards = true;
+          }
+        }
+        else
+        {
+          //Fallback if no player waypoint data, go forward
+          goingForwards = true;
+        }
+      }
+
       //Cycle waypoints
-      ++currentWaypointIndex;
-      if (currentWaypointIndex >= waypoints.Count())
-        currentWaypointIndex = 0;
+      if (goingForwards)
+      {
+        ++currentWaypointIndex;
+        if (currentWaypointIndex >= waypoints.Count())
+          currentWaypointIndex = 0;
+      }
+      else
+      {
+        --currentWaypointIndex;
+        if (currentWaypointIndex < 0)
+          currentWaypointIndex = waypoints.Count() - 1;
+      }
+        
 
       //Write to blackboard
       SetNodeData("currentWaypointIndex", currentWaypointIndex);
 
-      waitCounter = 0.0f;
+      //Only wait to change waypoints if not alert
+      if (GetNodeData("isAlert") != null && !(bool)GetNodeData("isAlert"))
+        waitCounter = 0.0f;
+
       isWaiting = true;
     }
     else if (false /*Physics.OverlapSphere(_selfTransform.position, 0.3f, 1 << 8).Length > 0 && retreatState == false*/)
@@ -150,8 +220,30 @@ public partial class LeafPatrol : BehaviourTreeNode
       //TODO delete this when original intended code above works with velocity being limited correctly
       if (rb != null)
       {
-        //Debug.Log("Null check passed?");
-        rb.LinearVelocity = normalisedDifference * patrolSpeed;
+        //Move quickly if alert
+        if (GetNodeData("isAlert") != null && (bool)GetNodeData("isAlert"))
+        {
+          //Debug.Log("Fast Patrol");
+          rb.LinearVelocity = normalisedDifference * chaseSpeed;
+        }  
+        else
+        {
+          rb.LinearVelocity = normalisedDifference * patrolSpeed;
+        }
+
+        //Unalert if AI reaches player nearest
+        if (GetNodeData("currentWaypointIndex") != null && GetNodeData("playerLastSightedWaypointIndex") != null)
+        {
+          if ((int)GetNodeData("currentWaypointIndex") == (int)GetNodeData("playerLastSightedWaypointIndex"))
+          {
+            if (GetNodeData("isAlert") != null && (bool)GetNodeData("isAlert"))
+            {
+              //Debug.Log("Unalert");
+              Audio.PlaySFXOnce2D("event:/Homeowner/humming");
+            }
+            SetNodeData("isAlert", false);
+          }
+        }
       }
       if (retreatState)
       {
@@ -167,7 +259,6 @@ public partial class LeafPatrol : BehaviourTreeNode
 
   private void DelayAtWaypoint()
   {
-    //Debug.Log("DelayAtWaypoint");
     waitCounter += Time.DeltaTimeF;
     if (waitCounter >= waitDuration)
       isWaiting = false;

Assets/Scripts/AIBehaviour/Implemented/LeafNodes/LeafSearch.cs

@@ -30,18 +30,14 @@ public partial class LeafSearch : BehaviourTreeNode
 //FUNCTIONS HERE
 public partial class LeafSearch : BehaviourTreeNode
 {
-  public LeafSearch(string name, Transform t, Vector3 eo, float sDist) : base(name)
+  public LeafSearch(string name) : base(name)
   {
-    transform = t;
-    eyeOffset = eo;
-    sightDistance = sDist;
-    player = null;
+    //Debug.Log("LeafSearch ctor");
   }
 
   //Helper, find the nearest unobstructed waypoint to return to when chase is over
-  private void reevaluateWaypoint()
+  public void reevaluateWaypoint()
   {
-    Debug.Log("Reevaluating Waypoints");
     List<GameObject> waypoints = (List<GameObject>)GetNodeData("waypoints");
 
     if (waypoints == null)
@@ -62,11 +58,40 @@ public partial class LeafSearch : BehaviourTreeNode
     SetNodeData("currentWaypointIndex", nearestWaypointIndex);
   }
 
+  //Helper for handling being alert
+
+  //Helper for handling stopping of chases
+  private void handleChaseStop()
+  {
+    if (GetNodeData("isAlert") != null && (bool)GetNodeData("isAlert") == true)
+    {
+      Audio.PlaySFXOnce2D("event:/Homeowner/humming");
+      reevaluateWaypoint();
+    }
+    SetNodeData("isAlert", false);
+  }
+
   public override BehaviourTreeNodeStatus Evaluate()
   {
     //Debug.LogWarning("LeafSearch");
     onEnter(BehaviourTreeNodeStatus.RUNNING);
 
+    //Get data
+    if (GetNodeData("transform") == null ||
+        GetNodeData("eyeOffset") == null ||
+        GetNodeData("sightDistance") == null)
+    {
+      status = BehaviourTreeNodeStatus.FAILURE;
+      onExit(BehaviourTreeNodeStatus.FAILURE);
+      return status;
+    }
+    else
+    {
+      transform = (Transform)GetNodeData("transform");
+      eyeOffset = (Vector3)GetNodeData("eyeOffset");
+      sightDistance = (float)GetNodeData("sightDistance");
+    }
+
     //Search for player
     player = GameObject.Find("Player");
 
@@ -94,12 +119,7 @@ public partial class LeafSearch : BehaviourTreeNode
       if ((plrT.GlobalPosition - transform.GlobalPosition).GetMagnitude() > sightDistance)
       {
         //Debug.Log("Failure: Too far");
-        if (GetNodeData("isAlert") != null && (bool)GetNodeData("isAlert") == true)
-        {
-          Debug.Log("AI play unalert hmm");
-          reevaluateWaypoint();
-        }
-        SetNodeData("isAlert", false);
+        //handleChaseStop();
         status = BehaviourTreeNodeStatus.FAILURE;
         onExit(BehaviourTreeNodeStatus.FAILURE);
         return status;
@@ -114,12 +134,7 @@ public partial class LeafSearch : BehaviourTreeNode
       if (Vector3.Dot(difference, lookDirection) < 0.0f)
       {
         //Debug.Log("Failure: Out of FOV");
-        if (GetNodeData("isAlert") != null && (bool)GetNodeData("isAlert") == true)
-        {
-          Debug.Log("AI play unalert hmm");
-          reevaluateWaypoint();
-        }
-        SetNodeData("isAlert", false);
+        //handleChaseStop();
         status = BehaviourTreeNodeStatus.FAILURE;
         onExit(BehaviourTreeNodeStatus.FAILURE);
         return status;
@@ -132,20 +147,27 @@ public partial class LeafSearch : BehaviourTreeNode
 
       //Draw a ray, succeed if ray is unobstructed
       Vector3 eyePosition = transform.GlobalPosition + eyeOffset;
-      Ray sightRay = new Ray(eyePosition, plrT.GlobalPosition - eyePosition);
+      BoxCollider playerCollider = player.GetValueOrDefault().GetComponent<Collider>().GetCollisionShape<BoxCollider>(0);
+      if (playerCollider == null)
+      {
+        //Debug.Log("Failure: Player has no collider");
+        status = BehaviourTreeNodeStatus.FAILURE;
+        onExit(BehaviourTreeNodeStatus.FAILURE);
+        return status;
+      }
+      //Ray destination to target the centre of the player's collider instead of transform position
+      //Since transform position is often the raccoon's base and the ray needs to hit somewhere higher to be more reliable
+      Vector3 rayDestination = plrT.GlobalPosition + plrT.GlobalScale * playerCollider.PositionOffset;
+      Ray sightRay = new Ray(eyePosition, rayDestination - eyePosition);
       RaycastHit sightRayHit = Physics.Raycast(sightRay);
       //As of November 2022, RaycastHit contains only the FIRST object hit by
       //the ray in the Other GameObject data member
       //Diren may likely add ALL objects hit by the ray over December
       if (sightRayHit.Hit && sightRayHit.Other != player)
       {
+        //TODO sometimes the ray doesn't hit the player even if he's in plain sight because the ray hits the floor the player is on instead???
         //Debug.Log("Failure: Ray hit obstacle named " + sightRayHit.Other.GetValueOrDefault().Name + " ID" + sightRayHit.Other.GetValueOrDefault().EntityId);
-        if (GetNodeData("isAlert") != null && (bool)GetNodeData("isAlert") == true)
-        {
-          Debug.Log("AI play unalert hmm");
-          reevaluateWaypoint();
-        }
-        SetNodeData("isAlert", false);
+        //handleChaseStop();
         status = BehaviourTreeNodeStatus.FAILURE;
         onExit(BehaviourTreeNodeStatus.FAILURE);
         return status;
@@ -160,11 +182,19 @@ public partial class LeafSearch : BehaviourTreeNode
       //Write player's transform into the blackboard
       SetNodeData("target", plrT);
 
-      if (GetNodeData("isAlert") != null && (bool)GetNodeData("isAlert") == false)
+      if (GetNodeData("isAlert") == null)
       {
-        Debug.Log("AI Play Alerted Yell here");
+        SetNodeData("isAlert", true);
+        Audio.PlaySFXOnce2D("event:/Homeowner/homeowner_detect_raccoon");
+      }
+      else
+      {
+        if (GetNodeData("isAlert") != null && (bool)GetNodeData("isAlert") == false)
+        {
+          Audio.PlaySFXOnce2D("event:/Homeowner/homeowner_detect_raccoon");
+        }
+        SetNodeData("isAlert", true);
       }
-      SetNodeData("isAlert", true);
 
       status = BehaviourTreeNodeStatus.SUCCESS;
       onExit(BehaviourTreeNodeStatus.SUCCESS);

SHADE_Engine/src/Graphics/MiddleEnd/Interface/SHRenderable.cpp

@@ -66,10 +66,12 @@ namespace SHADE
     {
       oldMaterial = material;
       material = {};
+      oldMatIsShared = false;
     }
     else if (sharedMaterial)
     {
       oldMaterial = sharedMaterial;
+      oldMatIsShared = true;
     }
 
     // Update the material
@@ -150,7 +152,7 @@ namespace SHADE
   {
     matChanged = false;
     meshChanged = false;
-    if (oldMaterial)
+    if (oldMaterial && !oldMatIsShared)
       oldMaterial.Free();
     oldMaterial = {};
     oldMesh = {};

SHADE_Engine/src/Graphics/MiddleEnd/Interface/SHRenderable.h

@@ -90,6 +90,7 @@ namespace SHADE
       bool matChanged = true;
       Handle<SHMaterialInstance> oldMaterial; 
       uint8_t lightLayer;
+      bool oldMatIsShared = false;
 
       RTTR_ENABLE()
 	};