From 939170f625e5928d5ca86a57796aaa23f25a4fa7 Mon Sep 17 00:00:00 2001
From: Carson Katri <carson.katri@gmail.com>
Date: Sat, 12 Jun 2021 16:55:43 -0400
Subject: Smooth leg animation

---
 Assets/Scripts/Controllers/AIController.cs   | 72 ++++++++++++++++++++++++++--
 Assets/Scripts/Controllers/GameController.cs |  2 +
 2 files changed, 70 insertions(+), 4 deletions(-)

(limited to 'Assets/Scripts')

diff --git a/Assets/Scripts/Controllers/AIController.cs b/Assets/Scripts/Controllers/AIController.cs
index 9f115c2..19a7d3e 100644
--- a/Assets/Scripts/Controllers/AIController.cs
+++ b/Assets/Scripts/Controllers/AIController.cs
@@ -1,19 +1,83 @@
+using System;
+using Controllers.Player;
 using UnityEngine;
+using Random = UnityEngine.Random;
 
 namespace Controllers
 {
+  [RequireComponent(typeof(Rigidbody2D))]
+  [RequireComponent(typeof(BoxCollider2D))]
   public class AIController : MonoBehaviour
   {
+    [SerializeField] private float speed;
+    
+    [Header("Legs")]
+    [SerializeField] private Leg leftLeg;
+    [SerializeField] private Leg rightLeg;
+    [SerializeField] private float maxLegAngle;
+    [SerializeField] private float legSpeed;
+
+    [Header("References")]
+    [SerializeField] private GameController game;
+    [SerializeField] private PlayerController player;
+
+    public Rigidbody2D Rigidbody => _rigidbody != null ? _rigidbody : _rigidbody = GetComponent<Rigidbody2D>();
+    private Rigidbody2D _rigidbody;
+    
+    public BoxCollider2D BoxCollider => _boxCollider != null ? _boxCollider : _boxCollider = GetComponent<BoxCollider2D>();
+    private BoxCollider2D _boxCollider;
+    
     private void Update()
     {
-      if (Input.GetKey(KeyCode.H))
+      if (!game.enemy.HasBall) // Move towards the ball to grab it.
       {
-        transform.position += Vector3.right * 0.01f;
+        transform.position += new Vector3(game.ball.transform.position.x - transform.position.x, 0f, 0f).normalized * (Time.deltaTime * speed);
+        
+        if (Vector2.Distance(player.transform.position, transform.position) < 1f) // Repel from the player if they get too close.
+        {
+          transform.position -= (player.transform.position - transform.position).normalized * (Time.deltaTime * speed / 2f);
+        }
+        
+        // Grab from the middle, and the bottom.
+        if (game.player.HasBall && Random.Range(0, 100) > 50) // 50% chance of them grabbing the ball from the player.
+        {
+          game.enemy.GrabBall(transform.position);
+          game.enemy.GrabBall(transform.position + new Vector3(0f, BoxCollider.size.y / 2, 0f));
+        }
       }
-      else if (Input.GetKey(KeyCode.F))
+      else // Otherwise, move toward the basket, and then once we get within range, take the shot.
       {
-        transform.position += Vector3.left * 0.01f;
       }
+
+      game.enemy.Move(transform.position + new Vector3(0f, BoxCollider.size.y / 2, 0f));
+      
+      leftLeg.top.transform.localRotation = Quaternion.Slerp(
+        leftLeg.top.transform.localRotation,
+        Quaternion.Euler(0, 0, maxLegAngle * Mathf.Sin(Time.time * legSpeed * (Rigidbody.velocity.magnitude / 5f))),
+        Time.deltaTime * 50f
+      );
+      leftLeg.bottom.transform.localRotation = Quaternion.Slerp(
+        leftLeg.bottom.transform.localRotation,
+        Quaternion.Euler(0, 0, maxLegAngle + maxLegAngle * Mathf.Sin(Time.time * legSpeed * (Rigidbody.velocity.magnitude / 5f))),
+        Time.deltaTime * 50f
+      );
+      rightLeg.top.transform.localRotation = Quaternion.Slerp(
+        rightLeg.top.transform.localRotation,
+        Quaternion.Euler(0, 0, maxLegAngle * Mathf.Sin(Time.time * -legSpeed * (Rigidbody.velocity.magnitude / 5f))),
+        Time.deltaTime * 50f
+      );
+      rightLeg.bottom.transform.localRotation = Quaternion.Slerp(
+        rightLeg.bottom.transform.localRotation,
+        Quaternion.Euler(0, 0, maxLegAngle + maxLegAngle * Mathf.Sin(Time.time * -legSpeed * (Rigidbody.velocity.magnitude / 5f))),
+        Time.deltaTime * 50f
+      );
+    }
+
+    [Serializable]
+    private struct Leg
+    {
+      public GameObject top;
+      public GameObject bottom;
     }
   }
 }
diff --git a/Assets/Scripts/Controllers/GameController.cs b/Assets/Scripts/Controllers/GameController.cs
index c326c4e..9ae0ce8 100644
--- a/Assets/Scripts/Controllers/GameController.cs
+++ b/Assets/Scripts/Controllers/GameController.cs
@@ -40,6 +40,8 @@ namespace Controllers
       private State dribble => isEnemy ? State.EnemyDribble : State.PlayerDribble;
       private State shoot => isEnemy ? State.EnemyShoot : State.PlayerShoot;
 
+      public bool HasBall => controller.state == dribble;
+
       /// <summary>
       /// When dribbling, move the ball with the player.
       /// </summary>
-- 
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