Zombies + Skeleton Physics arrow + aimbot

360 headhsot ezz

Assets/Scripts/UnitScripts/Attacks/ArrowHandler.cs

@@ -8,13 +8,19 @@ public class ArrowHandler : MonoBehaviour
 {
     [SerializeField] private float baseDamage;
     [SerializeField] private float baseKnockback;
-    public Rigidbody _rigidBody;
+    private Rigidbody _rigidBody;
 
     void Awake()
     {
         _rigidBody = GetComponent<Rigidbody>();
     }
 
+    void Update()
+    {
+        // Align with speed
+        if (_rigidBody.linearVelocity.magnitude >= 1f) transform.forward = _rigidBody.linearVelocity.normalized;
+    }
+
     public void LaunchArrow(Vector3 baseSpeed)
     {
         _rigidBody.linearVelocity = baseSpeed;
@@ -33,5 +39,7 @@ public class ArrowHandler : MonoBehaviour
             }
             unit.TakeDamage(baseDamage);
         }
+        
+        Destroy(this.gameObject);
     }
 }

Assets/Scripts/UnitScripts/Attacks/AttackHandler.cs

@@ -14,7 +14,7 @@ public class AttackHandler : MonoBehaviour
     [SerializeField] protected float knockbackVerticalForce;
     
     protected float _timer;
-    private MinecraftUnit _minecraftUnit;
+    protected MinecraftUnit _minecraftUnit;
 
     void Awake()
     {

Assets/Scripts/UnitScripts/Attacks/AttackSkeleton.cs

@@ -5,14 +5,55 @@ public class AttackSkeleton : AttackHandler
     [SerializeField] private GameObject arrowPrefab;
     [SerializeField] private float arrowBaseSpeed;
     [SerializeField] private Transform spawnPos;
+    [SerializeField] private bool directShot;
+
+    
     public override bool Attack()
     {
         if (_timer > 0) return false;
+        float launchAngle = findLaunchAngle();
+        //print(launchAngle);
+        // If target not reachable
+        if (launchAngle < 0) return false;
+        _timer = cooldown;
         
         GameObject arrow = Instantiate(arrowPrefab, spawnPos.position, spawnPos.rotation);
         ArrowHandler arrowHandler = arrow.GetComponent<ArrowHandler>();
-        arrowHandler.LaunchArrow(arrowBaseSpeed * spawnPos.forward);
+        // In target <-> launcher + transform.up basis
+        Vector2 localLaunchVector = arrowBaseSpeed * new Vector2(Mathf.Cos(launchAngle), Mathf.Sin(launchAngle));
+        // Transform it in global basis
+        AbstractUnit targetUnit = _minecraftUnit.MovementHandler.TargetUnit;
+        Vector3 diffVector = Vector3.ProjectOnPlane(targetUnit.transform.position - spawnPos.position, Vector3.up);
+        
+        Vector3 launchVectorNormalized = (localLaunchVector.x * diffVector.normalized + localLaunchVector.y * Vector3.up).normalized;
+        arrowHandler.LaunchArrow(launchVectorNormalized * arrowBaseSpeed);
         
         return true;
     }
+
+    private float findLaunchAngle()
+    {
+        // Source : https://en.wikipedia.org/wiki/Projectile_motion#Angle_%CE%B8_required_to_hit_coordinate_(x,_y)
+        
+        AbstractUnit targetUnit = _minecraftUnit.MovementHandler.TargetUnit;
+        Vector3 diffVector = Vector3.ProjectOnPlane(targetUnit.transform.position - spawnPos.position, Vector3.up);
+        
+        float x = Vector3.ProjectOnPlane(diffVector, Vector3.up).magnitude;
+        float y = diffVector.y;
+        float g = Physics.gravity.magnitude;
+        float v = arrowBaseSpeed;
+        float v_sqr = v * v;
+        //print("x : " + x);
+        
+        float inside_sqrt_root = v_sqr*v_sqr - g*(g*x*x + 2*y*v_sqr);
+        if (inside_sqrt_root < 0.0f) return -1f; // Can't reach target
+        
+        // directShot is the smallest angle, undirectShot shot is the biggest angle
+        float numerator = directShot ? v_sqr - Mathf.Sqrt(inside_sqrt_root) : v_sqr + Mathf.Sqrt(inside_sqrt_root);
+        float inside_arctan = numerator / (g * x);
+        print(inside_arctan);
+        return Mathf.Atan(inside_arctan);
+    }
+
+    
 }