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     private bool turn;
  31
  32     public BoxCollider2D BoxCollider => _boxCollider != null ? _boxCollider : _boxCollider = GetComponent<BoxCollider2D>();
  33     private BoxCollider2D _boxCollider;
  34
  35     private void Start()
  36     {
  37       // Try to grab (steal) the ball every n seconds.
  38       InvokeRepeating(nameof(GrabBall), 0, 0.5f);
  39       InvokeRepeating(nameof(ShootBall), 0, 2f);
  40     }
  41
  42     private void GrabBall()
  43     {
  44       // Grab from the middle, and the bottom.
  45       if (!game.player.HasBall || Random.Range(0, 100) > 70) // 30% chance of them grabbing the ball from the player.
  46       {
  47         game.enemy.GrabBall(transform.position);
  48         game.enemy.GrabBall(transform.position + new Vector3(0f, BoxCollider.size.y / 2, 0f));
  49       }
  50     }
  51
  52     private void ShootBall()
  53     {
  54       if (!game.enemy.HasBall) return;
  55       var hoopDistance = Mathf.Abs(transform.position.x - game.EnemyHoop.transform.position.x);
  56       var playerHoopDistance = Mathf.Abs(player.root.transform.position.x - game.EnemyHoop.transform.position.x);
  57       if (hoopDistance < 10.5f && 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.
  58       {
  59         game.enemy.Shoot(transform, Random.Range(0.5f, 1f));
  60       }
  61     }
  62
  63     private void Update()
  64     {
  65       if (game.freezeMotion) return;
  66
  67       var movement = transform.position;
  68
  69       if (!game.enemy.HasBall) // Move towards the ball to grab it.
  70       {
  71         if (Vector2.Distance(player.root.transform.position, transform.position) < 0.8f) // Repel from the player if they get too close.
  72         {
  73           // transform.position += new Vector3(-(player.transform.position - transform.position).normalized.x, 0, 0) * (Time.deltaTime * speed / 2f);
  74           transform.position = new Vector2(Vector2.MoveTowards(transform.position, player.root.transform.position, -1.5f * speed * Time.deltaTime).x, transform.position.y);
  75         }
  76         else
  77         {
  78           // transform.position += new Vector3(game.ball.transform.position.x - transform.position.x, 0f, 0f).normalized * (Time.deltaTime * speed);
  79           var direction = Vector2.MoveTowards(transform.position, game.ball.transform.position, speed * Time.deltaTime);
  80           transform.position = new Vector2(direction.x, transform.position.y);
  81         }
  82       }
  83       else // Otherwise, move toward the basket, and then once we get within range, take the shot.
  84       {
  85         // How far the enemy tries to get from the hoop before shooting.
  86         // Currently, it will try to shoot a 3pt. shot if down, but a 2pt. shot if up or tied.
  87         var targetDistance = game.enemy.score < game.player.score ? 10f : 4f;
  88         transform.position = new Vector2(Vector2.MoveTowards(transform.position, game.EnemyHoop.transform.position + new Vector3(targetDistance, 0, 0), speed * Time.deltaTime).x, transform.position.y);
  89       }
  90
  91       movement -= transform.position;
  92
  93       bool currentTurn = movement.x > 0;
  94       if (turn && currentTurn)
  95         flipper.transform.localScale = new Vector3(1f, 1f, 1f);
  96       else
  97         flipper.transform.localScale = new Vector3(-1f, 1f, 1f);
  98
  99       game.enemy.Move(transform.position + new Vector3(0f, BoxCollider.size.y * 3/4, 0f) + (transform.right * (0.5f * (turn && currentTurn ? -1 : 1))));
 100       turn = currentTurn;
 101
 102       leftLeg.top.transform.localRotation = Quaternion.Euler(0, 0, maxLegAngle * Mathf.Sin(animationStep * legSpeed));
 103       leftLeg.bottom.transform.localRotation = Quaternion.Euler(0, 0, maxLegAngle + maxLegAngle * Mathf.Sin(animationStep * legSpeed));
 104       rightLeg.top.transform.localRotation = Quaternion.Euler(0, 0, maxLegAngle * Mathf.Sin(animationStep * -legSpeed));
 105       rightLeg.bottom.transform.localRotation = Quaternion.Euler(0, 0, maxLegAngle + maxLegAngle * Mathf.Sin(animationStep * -legSpeed));
 106
 107       animationStep += Time.deltaTime * Mathf.Abs(movement.x);
 108     }
 109
 110     [Serializable]
 111     private struct Leg
 112     {
 113       public GameObject top;
 114       public GameObject bottom;
 115     }
 116   }
 117 }