Created Facts will get highlighted when Mouse-Over-Event occurs

Assets/InteractionEngine/CommunicationEvents.cs

@@ -12,12 +12,18 @@ public  class PointEvent : UnityEvent<RaycastHit,int>
     public class HitEvent : UnityEvent<RaycastHit>
     {
 
+    }
+    public class MouseOverFactEvent : UnityEvent<Transform>
+    {
+
     }
     public class ToolModeEvent : UnityEvent<ToolMode> {
 
     }
 
     public static HitEvent TriggerEvent = new HitEvent();
+    public static MouseOverFactEvent HighlightEvent = new MouseOverFactEvent();
+    public static MouseOverFactEvent EndHighlightEvent = new MouseOverFactEvent();
     public static ToolModeEvent ToolModeChangedEvent = new ToolModeEvent();
     public static PointEvent AddEvent = new PointEvent();
     public static PointEvent RemoveEvent = new PointEvent();

Assets/InteractionEngine/FactSpawner.cs

@@ -10,8 +10,14 @@ public class FactSpawner : MonoBehaviour
     public string[] Facts = new String[100];
     public GameObject[] GameObjectFacts = new GameObject[100];
 
+    //Variables for highlighting Facts where the cursor moves over
+    public Material defaultMaterial;
+    public Material highlightMaterial;
+
     void Start()
     {
+        CommunicationEvents.HighlightEvent.AddListener(OnMouseOverFact);
+        CommunicationEvents.EndHighlightEvent.AddListener(OnMouseOverFactEnd);
         CommunicationEvents.TriggerEvent.AddListener(OnHit);
         CommunicationEvents.ToolModeChangedEvent.AddListener(OnToolModeChanged);
         CommunicationEvents.AddEvent.AddListener(SpawnFact);
@@ -44,6 +50,8 @@ public void SpawnPoint(RaycastHit hit, int id)
         string letter = ((Char)(64+id+1)).ToString();
         point.GetComponentInChildren<TextMeshPro>().text = letter;
         //If a new Point was spawned -> We are in MarkPointMode -> Then we want the collider to be disabled
+        //Hint: Thats why by now, if we mark a Point in an other mode than MarkPointMode, the 
+        //Collider will be set disabled
         point.GetComponentInChildren<SphereCollider>().enabled = false;
         Facts[id] = letter;
         GameObjectFacts[id] = point;
@@ -57,6 +65,32 @@ public void DeletePoint(RaycastHit hit, int id)
         Facts[id] = "";
     }
 
+    public void OnMouseOverFactEnd(Transform selection)
+    {
+        Renderer selectionRenderer;
+        
+        if (selection != null)
+        {
+            selectionRenderer = selection.GetComponent<Renderer>();
+            if (selectionRenderer != null)
+            {
+                //Set the Material of the fact back to default
+                selectionRenderer.material = defaultMaterial;
+            }
+        }
+    }
+
+    public void OnMouseOverFact(Transform selection)
+    {
+        Renderer selectionRenderer;
+        
+        selectionRenderer = selection.GetComponent<Renderer>();
+        if (selectionRenderer != null) {
+            //Set the Material of the Fact, where the mouse is over, to a special one
+            selectionRenderer.material = highlightMaterial;
+        }
+    }
+
     public void OnHit(RaycastHit hit)
     {
 
@@ -88,11 +122,11 @@ public void OnToolModeChanged(ToolMode ActiveToolMode) {
             //but we don't want to have the ability to select Lines or Angles
                 foreach (GameObject GameObjectFact in this.GameObjectFacts)
                 {
-                    if (GameObjectFact.tag == "Line" || GameObjectFact.tag == "Angle")
+                    if (GameObjectFact.layer == LayerMask.NameToLayer("Line") || GameObjectFact.layer == LayerMask.NameToLayer("Angle"))
                     {
                         GameObjectFact.GetComponentInChildren<Collider>().enabled = false;
                     }
-                    else if (GameObjectFact.tag == "Point") {
+                    else if (GameObjectFact.layer == LayerMask.NameToLayer("Point")) {
                         GameObjectFact.GetComponentInChildren<Collider>().enabled = true;
                     }
                 }
@@ -102,11 +136,11 @@ public void OnToolModeChanged(ToolMode ActiveToolMode) {
             //but we don't want to have the ability to select Points or Angles
                 foreach (GameObject GameObjectFact in this.GameObjectFacts)
                 {
-                    if (GameObjectFact.tag == "Point" || GameObjectFact.tag == "Angle")
+                    if (GameObjectFact.layer == LayerMask.NameToLayer("Point") || GameObjectFact.layer == LayerMask.NameToLayer("Angle"))
                     {
                         GameObjectFact.GetComponentInChildren<Collider>().enabled = false;
                     }
-                    else if (GameObjectFact.tag == "Line")
+                    else if (GameObjectFact.layer == LayerMask.NameToLayer("Line"))
                     {
                         GameObjectFact.GetComponentInChildren<Collider>().enabled = true;
                     }

Assets/InteractionEngine/ToolModeText.cs

@@ -12,6 +12,7 @@ public class ToolModeText : MonoBehaviour
     // Start is called before the first frame update
     void Start()
     {
+        //Show the Text that the MarkPointMode is active on startup
         gameObject.GetComponentInChildren<UnityEngine.UI.Text>().CrossFadeAlpha(0.0f, 0.0f, false);
         gameObject.GetComponentInChildren<UnityEngine.UI.Text>().CrossFadeAlpha(1.0f, 0.9f, false);
         this.timerActive = true;

Assets/InteractionEngine/WorldCursor.cs

@@ -10,6 +10,9 @@ public class WorldCursor : MonoBehaviour
     private Camera Cam;
     private ToolMode ActiveToolMode{get; set;}
 
+    private string selectableTag = "Selectable";
+    private Transform lastFactSelection;
+
     void Start()
     {
         Cam = Camera.main;
@@ -31,6 +34,27 @@ void Update()
             transform.up = Hit.normal;
             transform.position += .01f * Hit.normal;
 
+            //SELECTION-HIGHLIGHTING-PART
+            //Check if a Fact was Hit
+            Transform selection = Hit.transform;
+
+            //Set the last Fact unselected
+            if (this.lastFactSelection != null)
+            {
+                //Invoke the EndHighlightEvent that will be handled in FactSpawner
+                CommunicationEvents.EndHighlightEvent.Invoke(this.lastFactSelection);
+                this.lastFactSelection = null;
+            }
+
+            //Set the Fact that was Hit as selected
+            if (selection.CompareTag(selectableTag))
+            {
+                //Invoke the HighlightEvent that will be handled in FactSpawner
+                this.lastFactSelection = selection;
+                CommunicationEvents.HighlightEvent.Invoke(selection);
+            }
+            //SELECTION-HIGHLIGHTING-PART-END
+
             CheckMouseButtons();
 
         }

Assets/Prefabs/Sphere.prefab

@@ -14,7 +14,7 @@ GameObject:
   - component: {fileID: 8087426936968725520}
   m_Layer: 10
   m_Name: Sphere
-  m_TagString: Point
+  m_TagString: Selectable
   m_Icon: {fileID: 0}
   m_NavMeshLayer: 0
   m_StaticEditorFlags: 0

Assets/TreeWorld.unity

@@ -1398,6 +1398,8 @@ MonoBehaviour:
   - {fileID: 0}
   - {fileID: 0}
   - {fileID: 0}
+  defaultMaterial: {fileID: 2100000, guid: 8ae9adf4dc782964387385c1e8c0eb72, type: 2}
+  highlightMaterial: {fileID: 2100000, guid: c7daa82e15f0cf04d92d0f41ce84f9df, type: 2}
 --- !u!1 &1675643434
 GameObject:
   m_ObjectHideFlags: 0

ProjectSettings/TagManager.asset

@@ -5,7 +5,7 @@ TagManager:
   serializedVersion: 2
   tags:
   - ToolModeDisplay
-  - Point
+  - Selectable
   layers:
   - Default
   - TransparentFX