WIP base of AIEntity

Assets/Prefabs/Gladiator.prefab

@@ -97,13 +97,13 @@ MonoBehaviour:
   m_Name: 
   m_EditorClassIdentifier: 
   <Health>k__BackingField: 0
-  movementSpeed: 5
-  rotSpeed: 3
   fov: 0
   attackRange: 1.5
   attackDmg: 10
   attackCooldown: 1
   target: {fileID: 0}
+  stats: {fileID: 11400000, guid: 9d8a9a664d932d0498d5eca7607eeb53, type: 2}
+  ennemyName: Monster
 --- !u!58 &3988163462708087662
 CircleCollider2D:
   m_ObjectHideFlags: 0

Assets/Prefabs/Monster.prefab

@@ -104,6 +104,7 @@ MonoBehaviour:
   attackDmg: 10
   attackCooldown: 1
   target: {fileID: 0}
+  stats: {fileID: 11400000, guid: 9d8a9a664d932d0498d5eca7607eeb53, type: 2}
 --- !u!50 &1427479462206541758
 Rigidbody2D:
   serializedVersion: 4

Assets/Scripts/AI Stats.asset

@@ -0,0 +1,15 @@
+%YAML 1.1
+%TAG !u! tag:unity3d.com,2011:
+--- !u!114 &11400000
+MonoBehaviour:
+  m_ObjectHideFlags: 0
+  m_CorrespondingSourceObject: {fileID: 0}
+  m_PrefabInstance: {fileID: 0}
+  m_PrefabAsset: {fileID: 0}
+  m_GameObject: {fileID: 0}
+  m_Enabled: 1
+  m_EditorHideFlags: 0
+  m_Script: {fileID: 11500000, guid: 4cd7eb51def0c7747bd646073babaf4f, type: 3}
+  m_Name: AI Stats
+  m_EditorClassIdentifier: 
+  closeEnough: 2

Assets/Scripts/AI Stats.asset.meta

@@ -0,0 +1,8 @@
+fileFormatVersion: 2
+guid: 9d8a9a664d932d0498d5eca7607eeb53
+NativeFormatImporter:
+  externalObjects: {}
+  mainObjectFileID: 11400000
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/Scripts/AIEntity.cs

@@ -0,0 +1,103 @@
+#nullable enable
+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+
+public class AIEntity : Entity
+{
+    [SerializeField] AIStats stats = null!;
+    public string ennemyName {get; protected set; }
+    
+    abstract class BaseStateAI : BaseState{
+		protected AIEntity entity;
+		public BaseStateAI(AIEntity entity){
+			this.entity = entity;
+		}
+	}
+
+    class SeekState : BaseStateAI{
+        public SeekState(AIEntity entity) : base(entity){
+
+        }
+
+        public override BaseState? UpdateState(){
+            Entity targetEntity = entity.GetTarget().GetComponent<Entity>();
+            if(targetEntity != null){
+                if(targetEntity.IsAlive()){//target is alive, keep chasing it 
+                    return null;
+                }else{//target is dead, go to findTargetState
+                    return new FindTargetState(entity);;
+                }
+            }
+            return null;
+        }
+
+        public override BaseState? FixedUpdateState(){
+            Transform target = entity.GetTarget();
+            entity.direction = Vector3.RotateTowards(entity.direction, (target.position - entity.transform.position), entity.rotSpeed*Time.fixedDeltaTime, 0.0f);
+            if(!entity.IsInAttackRange()){
+                entity.rb.MovePosition(entity.transform.position + entity.direction * entity.movementSpeed * Time.fixedDeltaTime);
+            }else{
+                return new AttackState(entity);
+            }
+            return null;
+        }
+    }
+
+    class FindTargetState : BaseStateAI{
+        float closeEnough;
+        public FindTargetState(AIEntity entity) : base(entity){
+        }
+
+        public override BaseState? UpdateState(){
+            Entity[] entities = FindObjectsOfType<Entity>();
+            float lastDist = -1;
+            Entity chosenEntity = null!;
+            foreach (Entity other in entities){// Find the closest entity
+                if(other.name == entity.ennemyName){
+                    float distance = Vector2.Distance(other.transform.position, entity.transform.position);
+                    if(distance < lastDist){
+                        lastDist = distance;
+                        chosenEntity = other;
+                        if(lastDist <= entity.stats.closeEnough)break;
+                    }
+                }
+            }
+            if(chosenEntity != null){
+                entity.SetTarget(chosenEntity.transform);
+            }
+            return new SeekState(entity);
+        }
+
+    }
+
+    class AttackState : BaseStateAI{
+        public AttackState(AIEntity entity) : base(entity){
+        }
+
+        public override BaseState? UpdateState(){
+            if(entity.IsInAttackRange()){
+                if(entity.attackTimer >= entity.attackCooldown){
+                    entity.attackTimer = 0;
+                    return Attack();
+                }else{
+                    entity.attackTimer += Time.deltaTime;
+                }
+                
+            }
+            return null;
+        }
+
+        private BaseState? Attack(){
+            Entity targetEntity = entity.GetTarget().GetComponent<Entity>();
+                if(targetEntity != null){
+                    targetEntity.TakeDamage(entity.attackDmg);
+                    bool isTargetAlive = targetEntity.IsAlive();
+                    if(!isTargetAlive){
+                        return new FindTargetState(entity);
+                    }
+                }
+            return null;
+        }
+    }
+}

Assets/Scripts/AIEntity.cs.meta

@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: a9081d4ec2499ba4ab3e13006869bfaf
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
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+  assetBundleVariant: 

Assets/Scripts/AIStats.cs

@@ -0,0 +1,6 @@
+using UnityEngine;
+
+[CreateAssetMenu]
+public class AIStats : ScriptableObject {
+	public float closeEnough = 1f;
+}

Assets/Scripts/AIStats.cs.meta

@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: 4cd7eb51def0c7747bd646073babaf4f
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
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Assets/Scripts/Entity.cs

@@ -6,18 +6,19 @@ using UnityEngine;
 public class Entity : MonoBehaviour 
 {
 	[field: SerializeField]protected float Health {get; private set; }
-    [SerializeField]private float movementSpeed;
-    [SerializeField]private float rotSpeed;
+    bool isAlive = true;
+    [SerializeField]public float movementSpeed{get; private set; }
+    [SerializeField]public float rotSpeed {get; private set; }
     [SerializeField]private float fov;
     [SerializeField]private float attackRange;
-    [SerializeField]private float attackDmg;
+    [SerializeField]public float attackDmg {get; private set; }
     [SerializeField]protected float attackCooldown;
     protected float attackTimer;
     [SerializeField]private Transform target;
-    private new string name;
+    public string entityName {get; protected set; }
     private Collider atkCollider;
-    private Vector3 direction;
-    Rigidbody2D rb;
+    public Vector3 direction {get; set; }
+    public Rigidbody2D rb {get; private set;}
 
     void Awake() => rb = GetComponent<Rigidbody2D>();
 
@@ -27,11 +28,6 @@ public class Entity : MonoBehaviour
     }
 
     protected virtual void Attack(){
-	    // jason: TODO Either have target be Entity instead of transform, or skip Attack when GetComponent<Entity>() is null
-        Entity targetEntity = target.GetComponent<Entity>();
-        if(targetEntity != null){
-            bool isTargetAlive = targetEntity.TakeDamage(attackDmg);
-        }
         
     }
 
@@ -60,19 +56,12 @@ public class Entity : MonoBehaviour
     public virtual bool TakeDamage(float amount){
         Health -= amount;
         if(Health <= 0){
+            isAlive = false;
             return false;
         }
         return true;
     }
 
-    public void SetName(string name){
-        this.name = name;
-    }
-
-    protected string GetName(){
-        return this.name;
-    }
-
     protected bool IsInAttackRange(){
         return Vector2.Distance(transform.position, target.position) <= attackRange;
     }
@@ -81,4 +70,8 @@ public class Entity : MonoBehaviour
         float angle = Vector2.SignedAngle(direction, (target.position - transform.position));
         return angle >= -fov && angle <= fov;
     }
+
+    public bool IsAlive(){
+        return isAlive;
+    }
 }

Assets/Scripts/Gladiator.cs

@@ -2,13 +2,14 @@ using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 
-public class Gladiator : Entity
+public class Gladiator : AIEntity
 {
     // Start is called before the first frame update
     override protected void Start()
     {
         base.Start();
-        base.SetName("Gladiator");
+        base.entityName = "Gladiator";
+        base.ennemyName = "Monster";
     }
 
     // Update is called once per frame

Assets/Scripts/Monster.cs

@@ -2,13 +2,14 @@ using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 
-public class Monster : Entity
+public class Monster : AIEntity
 {
     // Start is called before the first frame update
     override protected void Start()
     {
         base.Start();
-        base.SetName("Monster");
+        base.entityName = "Monster";
+        base.ennemyName = "Gladiator";
     }
 
     void FixedUpdate() => MoveToTarget(Time.fixedDeltaTime);

Assets/Scripts/VampireEntity.cs

@@ -8,7 +8,7 @@ public class VampireEntity : Entity {
 
 	protected override void Start() {
 		base.Start();
-		SetName("Vampire");
+		base.entityName = "Vampire";
 
 		initialHealth = Health;
 	}