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     [Header("Legs")]
  15     [SerializeField] private Leg leftLeg;
  16     [SerializeField] private Leg rightLeg;
  17     [SerializeField] private float maxLegAngle;
  18     [SerializeField] private float legSpeed;
  19
  20     [Header("References")]
  21     [SerializeField] private GameController game;
  22     [SerializeField] private PlayerController player;
  23
  24     public Rigidbody2D Rigidbody => _rigidbody != null ? _rigidbody : _rigidbody = GetComponent<Rigidbody2D>();
  25     private Rigidbody2D _rigidbody;
  26
  27     private float animationStep;
  28
  29     public BoxCollider2D BoxCollider => _boxCollider != null ? _boxCollider : _boxCollider = GetComponent<BoxCollider2D>();
  30     private BoxCollider2D _boxCollider;
  31
  32     private void Start()
  33     {
  34       // Try to grab (steal) the ball every n seconds.
  35       InvokeRepeating(nameof(GrabBall), 0, 0.5f);
  36     }
  37
  38     private void GrabBall()
  39     {
  40       // Grab from the middle, and the bottom.
  41       if (!game.player.HasBall || Random.Range(0, 100) > 70) // 30% chance of them grabbing the ball from the player.
  42       {
  43         game.enemy.GrabBall(transform.position);
  44         game.enemy.GrabBall(transform.position + new Vector3(0f, BoxCollider.size.y / 2, 0f));
  45       }
  46     }
  47
  48     private void Update()
  49     {
  50       var movement = transform.position;
  51
  52       if (!game.enemy.HasBall) // Move towards the ball to grab it.
  53       {
  54         if (Vector2.Distance(player.root.transform.position, transform.position) < 2f) // Repel from the player if they get too close.
  55         {
  56           // transform.position += new Vector3(-(player.transform.position - transform.position).normalized.x, 0, 0) * (Time.deltaTime * speed / 2f);
  57           transform.position = new Vector2(Vector2.MoveTowards(transform.position, player.root.transform.position, -1.5f * speed * Time.deltaTime).x, transform.position.y);
  58         }
  59         else
  60         {
  61           // transform.position += new Vector3(game.ball.transform.position.x - transform.position.x, 0f, 0f).normalized * (Time.deltaTime * speed);
  62           transform.position = new Vector2(Vector2.MoveTowards(transform.position, game.ball.transform.position, speed * Time.deltaTime).x, transform.position.y);
  63         }
  64       }
  65       else // Otherwise, move toward the basket, and then once we get within range, take the shot.
  66       {
  67       }
  68
  69       movement -= transform.position;
  70
  71       game.enemy.Move(transform.position + new Vector3(0f, BoxCollider.size.y / 2, 0f));
  72
  73       leftLeg.top.transform.localRotation = Quaternion.Euler(0, 0, maxLegAngle * Mathf.Sin(animationStep * legSpeed));
  74       leftLeg.bottom.transform.localRotation = Quaternion.Euler(0, 0, maxLegAngle + maxLegAngle * Mathf.Sin(animationStep * legSpeed));
  75       rightLeg.top.transform.localRotation = Quaternion.Euler(0, 0, maxLegAngle * Mathf.Sin(animationStep * -legSpeed));
  76       rightLeg.bottom.transform.localRotation = Quaternion.Euler(0, 0, maxLegAngle + maxLegAngle * Mathf.Sin(animationStep * -legSpeed));
  77
  78       animationStep += Time.deltaTime * Mathf.Abs(movement.x);
  79     }
  80
  81     [Serializable]
  82     private struct Leg
  83     {
  84       public GameObject top;
  85       public GameObject bottom;
  86     }
  87   }
  88 }