Assets/Scripts/Controllers/AIController.cs

   1 using System;
   2 using Controllers.Player;
   3 using UnityEngine;
   4 using Random = UnityEngine.Random;
   5
   6 namespace Controllers
   7 {
   8   [RequireComponent(typeof(Rigidbody2D))]
   9   [RequireComponent(typeof(BoxCollider2D))]
  10   public class AIController : MonoBehaviour
  11   {
  12     [SerializeField] private float speed;
  13
  14     [SerializeField] private Transform flipper;
  15
  16     [Header("Legs")]
  17     [SerializeField] private Leg leftLeg;
  18     [SerializeField] private Leg rightLeg;
  19     [SerializeField] private float maxLegAngle;
  20     [SerializeField] private float legSpeed;
  21
  22     [Header("References")]
  23     [SerializeField] private GameController game;
  24     [SerializeField] private PlayerController player;
  25
  26     public Rigidbody2D Rigidbody => _rigidbody != null ? _rigidbody : _rigidbody = GetComponent<Rigidbody2D>();
  27     private Rigidbody2D _rigidbody;
  28
  29     private float animationStep;
  30
  31     public BoxCollider2D BoxCollider => _boxCollider != null ? _boxCollider : _boxCollider = GetComponent<BoxCollider2D>();
  32     private BoxCollider2D _boxCollider;
  33
  34     private void Start()
  35     {
  36       // Try to grab (steal) the ball every n seconds.
  37       InvokeRepeating(nameof(GrabBall), 0, 0.5f);
  38       InvokeRepeating(nameof(ShootBall), 0, 2f);
  39     }
  40
  41     private void GrabBall()
  42     {
  43       // Grab from the middle, and the bottom.
  44       if (!game.player.HasBall || Random.Range(0, 100) > 70) // 30% chance of them grabbing the ball from the player.
  45       {
  46         game.enemy.GrabBall(transform.position);
  47         game.enemy.GrabBall(transform.position + new Vector3(0f, BoxCollider.size.y / 2, 0f));
  48       }
  49     }
  50
  51     private void ShootBall()
  52     {
  53       if (!game.enemy.HasBall) return;
  54       var hoopDistance = Mathf.Abs(transform.position.x - game.EnemyHoop.transform.position.x);
  55       var playerHoopDistance = Mathf.Abs(player.root.transform.position.x - game.EnemyHoop.transform.position.x);
  56       if (hoopDistance < 6f && hoopDistance > 2.5f && (Random.Range(0, 100) > 30 || playerHoopDistance > hoopDistance)) // Take the shot when in range. 70% chance he decides to if the player is standing between him and the basket.
  57       {
  58         game.enemy.Shoot(transform, 0f);
  59       }
  60     }
  61
  62     private void Update()
  63     {
  64       var movement = transform.position;
  65
  66       if (!game.enemy.HasBall) // Move towards the ball to grab it.
  67       {
  68         if (Vector2.Distance(player.root.transform.position, transform.position) < 0.8f) // Repel from the player if they get too close.
  69         {
  70           // transform.position += new Vector3(-(player.transform.position - transform.position).normalized.x, 0, 0) * (Time.deltaTime * speed / 2f);
  71           transform.position = new Vector2(Vector2.MoveTowards(transform.position, player.root.transform.position, -1.5f * speed * Time.deltaTime).x, transform.position.y);
  72         }
  73         else
  74         {
  75           // transform.position += new Vector3(game.ball.transform.position.x - transform.position.x, 0f, 0f).normalized * (Time.deltaTime * speed);
  76           var direction = Vector2.MoveTowards(transform.position, game.ball.transform.position, speed * Time.deltaTime);
  77           transform.position = new Vector2(direction.x, transform.position.y);
  78           flipper.localScale = new Vector3((Vector2.Distance(transform.position, direction) > 0 ? -1f : 1f), 1, 1);
  79         }
  80       }
  81       else // Otherwise, move toward the basket, and then once we get within range, take the shot.
  82       {
  83         // How far the enemy tries to get from the hoop before shooting.
  84         // Currently, it will try to shoot a 3pt. shot if down, but a 2pt. shot if up or tied.
  85         var targetDistance = game.enemy.score < game.player.score ? 5f : 3f;
  86         transform.position = new Vector2(Vector2.MoveTowards(transform.position, game.EnemyHoop.transform.position + new Vector3(targetDistance, 0, 0), speed * Time.deltaTime).x, transform.position.y);
  87       }
  88
  89       movement -= transform.position;
  90
  91       game.enemy.Move(transform.position + new Vector3(0f, BoxCollider.size.y * 3/4, 0f));
  92
  93       leftLeg.top.transform.localRotation = Quaternion.Euler(0, 0, maxLegAngle * Mathf.Sin(animationStep * legSpeed));
  94       leftLeg.bottom.transform.localRotation = Quaternion.Euler(0, 0, maxLegAngle + maxLegAngle * Mathf.Sin(animationStep * legSpeed));
  95       rightLeg.top.transform.localRotation = Quaternion.Euler(0, 0, maxLegAngle * Mathf.Sin(animationStep * -legSpeed));
  96       rightLeg.bottom.transform.localRotation = Quaternion.Euler(0, 0, maxLegAngle + maxLegAngle * Mathf.Sin(animationStep * -legSpeed));
  97
  98       animationStep += Time.deltaTime * Mathf.Abs(movement.x);
  99     }
 100
 101     [Serializable]
 102     private struct Leg
 103     {
 104       public GameObject top;
 105       public GameObject bottom;
 106     }
 107   }
 108 }