Unity Füge Feinde zu einem 2D-Plattformer hinzu

Das Erstellen eines Plattformspiels in Unity ist relativ einfach, aber das Hinzufügen funktionsfähiger Feinde ist möglicherweise nicht so einfach.

In diesem Beitrag werde ich zeigen, wie man ein 2D-Plattformspiel mit einer feindlichen KI erstellt.

Im Allgemeinen kann der Spieler in 2D-Plattformspielen nur vorwärts/rückwärts gehen, springen und in einigen Fällen die Leiter hinauf/hinunter klettern, wenn die Karte mehrere Ebenen hat. Wir wissen, dass wir einen modularen Ansatz verwenden könnten, bei dem derselbe Controller zwischen dem Spieler und der KI geteilt wird.

Schritt 1: Erstellen Sie die Skripte

Beginnen wir mit der Erstellung aller notwendigen Skripte. Überprüfen Sie den Quellcode unten:

Ladder2D.cs

//Copyright @2018 sharpcoderblog.com
//You are free to use this script in free or commercial projects
//Selling the source code of this script is not allowed

using UnityEngine;

public class Ladder2D : MonoBehaviour
{
    Collider2D ladderCollider;
    [HideInInspector]
    public Vector3 boundsCenter;

    void Start()
    {
        //t = transform;
        ladderCollider = GetComponent<Collider2D>();
        if (ladderCollider)
        {
            ladderCollider.isTrigger = true;
            ladderCollider.gameObject.layer = 2; //Set ladder collider layer to IgnoreRaycast
        }
    }

    void OnTriggerEnter2D(Collider2D other)
    {
        if (other.CompareTag("Player"))
        {
            if (ladderCollider)
            {
                boundsCenter = ladderCollider.bounds.center;
            }
            other.SendMessage("AssignLadder", this, SendMessageOptions.DontRequireReceiver);
        }
    }

    void OnTriggerExit2D(Collider2D other)
    {
        if (other.CompareTag("Player"))
        {
            other.SendMessage("RemoveLadder", this, SendMessageOptions.DontRequireReceiver);
        }
    }
}

PlayerController2D.cs

//Copyright @2018 sharpcoderblog.com
//You are free to use this script in free or commercial projects
//Selling the source code of this script is not allowed

using System.Collections.Generic;
using UnityEngine;

public class PlayerController2D : MonoBehaviour
{
    //Move player in 2D space
    public float maxSpeed = 2.57f;
    public float jumpHeight = 6.47f;
    public float playerHP = 100;

    [HideInInspector]
    public bool facingRight = true;
    [HideInInspector]
    public float moveDirection = 0;
    [HideInInspector]
    public Rigidbody2D r2d;
    [HideInInspector]
    public Collider2D mainCollider;
    [HideInInspector]
    public Vector2 playerDimensions;
    [HideInInspector]
    public bool isGrounded = false;
    //Check every collider except Player and Ignore Raycast
    LayerMask layerMask = ~(1 << 2 | 1 << 8); //Make sure our player has Layer 8

    [HideInInspector]
    public Ladder2D currentLadder;
    List<Ladder2D> allLadders = new List<Ladder2D>();
    float moveDirectionY = 0;
    float distanceFromLadder;
    [HideInInspector]
    public bool isAttachedToLadder = false;
    bool ladderGoingDown = false;
    //bool isMovingOnLadder = false;
    [HideInInspector]
    public bool canGoDownOnLadder = false;
    [HideInInspector]
    public bool canClimbLadder = false;

    //Bot movement directions
    [HideInInspector]
    public bool isBot = false;
    [HideInInspector]
    public float botMovement = 0;
    [HideInInspector]
    public float botVerticalMovement = 0;
    [HideInInspector]
    public bool botJump = false;
    [HideInInspector]
    public Transform t;
    [HideInInspector]
    public int selectedWeaponTmp = 0;

    float gravityScale;

    // Use this for initialization
    void Start()
    {
        r2d = GetComponent<Rigidbody2D>();
        r2d.freezeRotation = true;
        mainCollider = GetComponent<Collider2D>();
        t = transform;

        gravityScale = r2d.gravityScale;
        selectedWeaponTmp = -100;

        facingRight = t.localScale.x > 0;

        //sr = GetComponent<SpriteRenderer>();
        playerDimensions = BotController2D.ColliderDimensions(GetComponent<Collider2D>());
    }

    void OnDisable()
    {
        r2d.bodyType = RigidbodyType2D.Static;
        r2d.velocity = Vector3.zero;
    }

    // Update is called once per frame
    void Update()
    {
        if (!isBot)
        {
            if ((Input.GetKey(KeyCode.A) || Input.GetKey(KeyCode.D)) &&
                (isGrounded || r2d.velocity.x > 0.01f || isAttachedToLadder))
            {
                moveDirection = Input.GetKey(KeyCode.A) ? -1 : 1;
            }
            else
            {
                if (isGrounded || r2d.velocity.magnitude < 0.01f)
                    moveDirection = 0;
            }
        }
        else
        {
            if (botMovement != 0 && (isGrounded || r2d.velocity.x > 0.01f))
            {
                moveDirection = botMovement < 0 ? -1 : 1;
            }
            else
            {
                if (isGrounded || r2d.velocity.magnitude < 0.01f)
                    moveDirection = 0;
            }
        }

        //Change facing position
        if (moveDirection != 0)
        {
            if (moveDirection > 0 && !facingRight)
            {
                facingRight = true;
            }
            if (moveDirection < 0 && facingRight)
            {
                facingRight = false;
            }
        }

        if (facingRight)
        {
            if (t.localScale.x < 0)
            {
                t.localScale = new Vector3(Mathf.Abs(t.localScale.x), t.localScale.y, transform.localScale.z);
            }
        }
        else
        {
            if (t.localScale.x > 0)
            {
                t.localScale = new Vector3(-Mathf.Abs(t.localScale.x), t.localScale.y, t.localScale.z);
            }
        }

        //Vector2 velocityTmp = r2d.velocity;
        bool canGoDownTmp = false;

        // LADDER CONTROL START
        if (currentLadder)
        {
            distanceFromLadder = Mathf.Abs(currentLadder.boundsCenter.x - t.position.x);
            canClimbLadder = distanceFromLadder < 0.34f;
            if (!isAttachedToLadder)
            {
                if (canClimbLadder)
                {
                    if (currentLadder.boundsCenter.y > t.position.y)
                    {
                        if (!isBot)
                        {
                            if (Input.GetKey(KeyCode.W))
                            {
                                isAttachedToLadder = true;
                            }
                        }
                        else
                        {
                            if (botVerticalMovement > 0)
                            {
                                isAttachedToLadder = true;
                            }
                        }
                    }
                    if (currentLadder.boundsCenter.y < t.position.y)
                    {
                        if (!isBot)
                        {
                            if (Input.GetKey(KeyCode.S))
                            {
                                isAttachedToLadder = true;
                            }
                        }
                        else
                        {
                            if (botVerticalMovement < 0)
                            {
                                isAttachedToLadder = true;
                            }
                        }

                        canGoDownTmp = true;
                    }
                }

                if (isAttachedToLadder)
                {
                    r2d.gravityScale = 0;
                    moveDirection = 0;
                    moveDirectionY = 0;
                }
            }
            else
            {
                //Make our collider trigger if we stand on top of the ladder (To prevent collision with the ground while going down)
                mainCollider.isTrigger = currentLadder.boundsCenter.y < t.position.y; 

                //Ladder movement
                if ((!isBot && Input.GetKey(KeyCode.W)) || (isBot && botVerticalMovement > 0))
                {
                    moveDirectionY = 3.97f;
                    ladderGoingDown = false;
                    //For sound controller
                    //isMovingOnLadder = true;
                }
                else if ((!isBot && Input.GetKey(KeyCode.S)) || (isBot && botVerticalMovement < 0))
                {
                    moveDirectionY = -3.97f;
                    ladderGoingDown = true;
                    if (!mainCollider.isTrigger && isGrounded)
                    {
                        //RemoveLadder(currentLadder);
                        isAttachedToLadder = false;
                        mainCollider.isTrigger = false;
                        r2d.gravityScale = gravityScale;
                        moveDirectionY = 0;
                    }
                    //For sound controller
                    //isMovingOnLadder = true;
                }
                else
                {
                    //isMovingOnLadder = false;
                    moveDirectionY = 0;
                }
            }

            if (distanceFromLadder > playerDimensions.x * 2)
            {
                RemoveLadder(currentLadder);
            }
        }
        canGoDownOnLadder = canGoDownTmp;
        // LADDER CONTROL END

        if (!isBot)
        {
            //Jumping
            if (Input.GetKeyDown(KeyCode.W))
            {
                Jump();
            }
        }
        else
        {
            if (botJump)
            {
                botJump = false;
                Jump();
            }
        }

        if (!isBot)
        {
            //Weapon firing
            if (Input.GetKeyDown(KeyCode.LeftControl))
            {
                Attack();
            }
        }
    }

    void FixedUpdate()
    {
        Bounds colliderBounds = mainCollider.bounds;
        Vector3 groundCheckPos = colliderBounds.min + new Vector3(colliderBounds.size.x * 0.5f, 0.1f, 0);
        //Check if player is grounded
        isGrounded = Physics2D.OverlapCircle(groundCheckPos, 0.25f, layerMask);

        Debug.DrawLine(groundCheckPos, groundCheckPos - new Vector3(0, 0.25f, 0), isGrounded ? Color.green : Color.red);

        //Apply player velocity
        r2d.velocity = new Vector2((moveDirection) * maxSpeed, isAttachedToLadder ? moveDirectionY : r2d.velocity.y);
    }

    void AssignLadder(Ladder2D ladderTmp)
    {
        currentLadder = ladderTmp;
        allLadders.Add(ladderTmp);
    }

    void RemoveLadder(Ladder2D ladderTmp)
    {
        //print("On trigger out");
        allLadders.Remove(ladderTmp);
        if (currentLadder == ladderTmp)
        {
            currentLadder = null;

            if (allLadders.Count > 0)
            {
                currentLadder = allLadders[allLadders.Count - 1];
            }
        }

        if (isAttachedToLadder && !currentLadder)
        {
            isAttachedToLadder = false;
            //r2d.bodyType = RigidbodyType2D.Dynamic;
            mainCollider.isTrigger = false;

            r2d.gravityScale = gravityScale;
            r2d.velocity = Vector3.zero;

            if (!ladderGoingDown)
            {
                r2d.velocity = new Vector2(r2d.velocity.x, 1.47f);
            }
            ladderGoingDown = false;
        }
    }

    public void Jump()
    {
        if (isGrounded && !isAttachedToLadder)
        {
            r2d.velocity = new Vector2(r2d.velocity.x, jumpHeight);
            //Tip: Play jump sound here
        }
    }

    public void Attack()
    {
        print(gameObject.name + " is Attacking");

        //Tip: Write your attack function here (ex. Raycast toward the enemy to inflict the damage)
    }
}

CameraFollow2D.cs

//Copyright @2018 sharpcoderblog.com
//You are free to use this script in free or commercial projects
//Selling the source code of this script is not allowed

using UnityEngine;

public class CameraFollow2D : MonoBehaviour
{
    public Transform target;
    public Vector3 offset = new Vector3(0, 2.8f, 0);
    public bool smoothFollow = true;

    Vector2 moveToPos;
    bool beginMove = false;
    float distanceTmp = 0f;

    // Update is called once per frame
    void LateUpdate()
    {
        if (!target)
            return;

        if (smoothFollow)
        {
            distanceTmp = ((target.position + offset) - transform.position).sqrMagnitude;
            if (beginMove)
            {
                moveToPos = Vector3.Lerp(moveToPos, target.position + offset, Time.fixedDeltaTime * 7.75f);
                transform.position = new Vector3(moveToPos.x, moveToPos.y, -10);

                if (distanceTmp < 0.05f * 0.05f)
                {
                    beginMove = false;
                }
            }
            else
            {
                if (distanceTmp > 0.5f * 0.5f)
                {
                    beginMove = true;
                }
            }
        }
        else
        {
            transform.position = new Vector3(target.position.x, target.position.y, -10);
        }

    }

    void StopFollowing()
    {
        beginMove = false;
    }
}

BotController2D.cs

//Copyright @2018 sharpcoderblog.com
//You are free to use this script in free or commercial projects
//Selling the source code of this script is not allowed

using System.Collections;
using UnityEngine;

public class BotController2D : MonoBehaviour
{
    //This script will handle bot control
    public enum BotType { Enemy, Friendly }
    public BotType botType = BotType.Enemy;
    public enum BotDifficulty { Easy, Medium, Hard }
    public BotDifficulty botDifficulty = BotDifficulty.Medium;
    public enum InitialState { Idle, Explore }
    public InitialState initialState = InitialState.Idle; //Should the Bot stand in place until approached or begin exploring the level right away
    public bool canJump = true; //Can this bot jump?

    public enum CurrentState { Idle, MovingLeft, MovingRight, GoinUPLadder, GoingDownLadder, Attack }
    CurrentState currentState;
    InitialState appliedState;
    PlayerController2D pc2d;
    RaycastHit2D hitLeft;
    RaycastHit2D hitRight;
    RaycastHit2D groundHit;
    Vector3 leftOrigin;
    Vector3 rightOrigin;
    float distanceLeft = -1;
    float distanceRight = -1;

    int encounteredLadders = 0;
    int encounteredLaddersCacche = 0;
    Ladder2D previousLadder;
    Ladder2D lastAttachedLadder;
    bool previousCanGoDownOnLadder = false;
    bool previousCanClimbLadder = false;

    //Everything except "Player" and "IgnoreRaycast" layers
    LayerMask layerMask = ~(1 << 2 | 1 << 8);
    //Only "Player" layer
    LayerMask playerLayerMask = 1 << 8;

    float timeMotionless = 0.0f;
    bool statePause = false;

    float trVelocity;
    Vector3 previousPos;

    Collider2D[] detectedPlayers = new Collider2D[0];
    Collider2D[] previousDetectedPlayers = new Collider2D[0];
    PlayerController2D enemyToFollow;
    int followPriority = 0; //0 = Easy, 1 = Medium (This player inflicted the damage)

    [HideInInspector]
    public Transform t;

    bool checkingTotalEnemies = false;
    bool runAway = false;

    int attackingFromLeft = 0;
    int attackingFromRight = 0;

    //Limit attack rate for easy bots
    float attackTimer = 0;
    float nextAttackTime = 0;

    Camera mainCamera;
    float cameraWidth; //Horizontal size of camera view

    // Use this for initialization
    void Start()
    {
        pc2d = GetComponent<PlayerController2D>();
        pc2d.isBot = true;
        t = transform;
        appliedState = initialState;

        if (Random.Range(-10, 10) > 0)
        {
            StartCoroutine(StatePause(CurrentState.Idle, true));
        }
    }

    // Update is called once per frame
    void FixedUpdate()
    {
        //Draw rays back and forth

        if (!mainCamera)
        {
            mainCamera = Camera.main;
            cameraWidth = mainCamera.aspect * mainCamera.orthographicSize;
        }

        rightOrigin = t.position + t.right * (pc2d.playerDimensions.x / 2f);
        hitRight = Physics2D.Raycast(rightOrigin, t.right, cameraWidth, layerMask);
        if (hitRight)
        {
            Debug.DrawLine(rightOrigin, hitRight.point, Color.red);
            distanceRight = hitRight.distance;
        }
        else
        {
            Debug.DrawLine(rightOrigin, rightOrigin + t.right * cameraWidth, Color.cyan);
            distanceRight = -1;
        }

        leftOrigin = t.position - t.right * (pc2d.playerDimensions.x / 2f);
        hitLeft = Physics2D.Raycast(leftOrigin, -t.right, cameraWidth, layerMask);
        if (hitLeft)
        {
            Debug.DrawLine(leftOrigin, hitLeft.point, Color.red);
            distanceLeft = hitLeft.distance;
        }
        else
        {
            Debug.DrawLine(leftOrigin, leftOrigin - t.right * cameraWidth, Color.cyan);
            distanceLeft = -1;
        }

        if (appliedState == InitialState.Explore)
        {
            if (currentState == CurrentState.Idle)
            {
                if (!statePause)
                {
                    //Decide which direction to move
                    if (distanceRight == -1 && distanceLeft == -1)
                    {
                        //Decide random direaction
                        currentState = Random.Range(-10, 10) > 0 ? CurrentState.MovingRight : CurrentState.MovingLeft;
                    }
                    else if (distanceRight == -1 && distanceLeft >= 0)
                    {
                        currentState = CurrentState.MovingRight;
                    }
                    else if (distanceRight >= 0 && distanceLeft == -1)
                    {
                        currentState = CurrentState.MovingLeft;
                    }
                    else if (distanceRight > distanceLeft)
                    {
                        currentState = CurrentState.MovingRight;
                    }
                    else if (distanceRight < distanceLeft)
                    {
                        currentState = CurrentState.MovingLeft;
                    }
                }
            }
            else if (currentState == CurrentState.MovingLeft)
            {
                if (!statePause && pc2d.isGrounded)
                {
                    pc2d.botMovement = -1;
                    float jumpHeightTmp = pc2d.jumpHeight * 0.25f;

                    if (distanceLeft > 0 && distanceLeft < pc2d.playerDimensions.x)
                    {
                        if (hitLeft && canJump &&
                            !Physics2D.Linecast(t.position + t.up * jumpHeightTmp, (t.position + t.up * jumpHeightTmp) - t.right * pc2d.playerDimensions.x * 2, layerMask) &&
                            Random.Range(-2, 10) > 0
                        )
                        {
                            StartCoroutine(DoJump());
                        }
                        else
                        {
                            if (!enemyToFollow)
                            {
                                StartCoroutine(StatePause(CurrentState.Idle, true));
                            }
                        }
                    }

                    /*if(!Physics2D.Linecast(t.position + t.up * jumpHeightTmp, (t.position + t.up * jumpHeightTmp) - t.right * pc2d.playerDimensions.x * 2)){
                        Debug.DrawLine(t.position + t.up * jumpHeightTmp, (t.position + t.up * jumpHeightTmp) - t.right * pc2d.playerDimensions.x * 2, Color.yellow);
                    }
                    else
                    {
                        Debug.DrawLine(t.position + t.up * jumpHeightTmp, (t.position + t.up * jumpHeightTmp) - t.right * pc2d.playerDimensions.x * 2, Color.red);
                    }*/

                    //Jump if there is no groun in front
                    groundHit = Physics2D.Raycast(leftOrigin, -t.up, pc2d.playerDimensions.y * 2.1f, layerMask);
                    if (groundHit)
                    {
                        Debug.DrawLine(leftOrigin, groundHit.point, Color.red);
                    }
                    else
                    {
                        Debug.DrawLine(leftOrigin, leftOrigin - t.up * (pc2d.playerDimensions.y * 2.1f), Color.blue);
                        if (canJump)
                        {
                            StartCoroutine(DoJump());
                        }
                        else
                        {
                            //StartCoroutine(StatePause(CurrentState.MovingRight, true));
                            StartCoroutine(CheckEnemiesEnumerator(1, 0, false));
                        }
                    }
                }
            }
            else if (currentState == CurrentState.MovingRight)
            {
                if (!statePause && pc2d.isGrounded)
                {
                    pc2d.botMovement = 1;
                    float jumpHeightTmp = pc2d.jumpHeight * 0.25f;

                    if (distanceRight > 0 && distanceRight < pc2d.playerDimensions.x)
                    {
                        if (hitRight && canJump &&
                            !Physics2D.Linecast(t.position + t.up * jumpHeightTmp, (t.position + t.up * jumpHeightTmp) + t.right * pc2d.playerDimensions.x * 2, layerMask) &&
                            Random.Range(-2, 10) > 0
                        )
                        {
                            StartCoroutine(DoJump());
                        }
                        else
                        {
                            if (!enemyToFollow)
                            {
                                StartCoroutine(StatePause(CurrentState.Idle, true));
                            }
                        }
                    }

                    /*if (!Physics2D.Linecast(t.position + t.up * jumpHeightTmp, (t.position + t.up * jumpHeightTmp) + t.right * pc2d.playerDimensions.x * 2))
                    {
                        Debug.DrawLine(t.position + t.up * jumpHeightTmp, (t.position + t.up * jumpHeightTmp) + t.right * pc2d.playerDimensions.x * 2, Color.yellow);
                    }
                    else
                    {
                        Debug.DrawLine(t.position + t.up * jumpHeightTmp, (t.position + t.up * jumpHeightTmp) + t.right * pc2d.playerDimensions.x * 2, Color.red);
                    }*/

                    //Jump if there is no groun in front
                    groundHit = Physics2D.Raycast(rightOrigin, -t.up, pc2d.playerDimensions.y * 2.1f, layerMask);
                    if (groundHit)
                    {
                        Debug.DrawLine(rightOrigin, groundHit.point, Color.red);
                    }
                    else
                    {
                        Debug.DrawLine(rightOrigin, rightOrigin - t.up * (pc2d.playerDimensions.y * 2.1f), Color.blue);
                        if (canJump)
                        {
                            StartCoroutine(DoJump());
                        }
                        else
                        {
                            //StartCoroutine(StatePause(CurrentState.MovingLeft, true));
                            StartCoroutine(CheckEnemiesEnumerator(0, 1, false));
                        }
                    }
                }
            }
            else if (currentState == CurrentState.GoinUPLadder)
            {
                if (!statePause)
                {
                    pc2d.botVerticalMovement = 1;
                    if (!pc2d.currentLadder)
                    {
                        StartCoroutine(StatePause(CurrentState.Idle, true));
                    }
                }
            }
            else if (currentState == CurrentState.GoingDownLadder)
            {
                if (!statePause)
                {
                    pc2d.botVerticalMovement = -1;
                    if (!pc2d.currentLadder)
                    {
                        StartCoroutine(StatePause(CurrentState.Idle, true));
                    }
                }
            }
            else if (currentState == CurrentState.Attack)
            {
                if (!statePause)
                {
                    if (!enemyToFollow)
                    {
                        StartCoroutine(StatePause(CurrentState.Idle, true));
                    }
                    else
                    {
                        //Firing weapon
                        if (attackTimer >= nextAttackTime)
                        {
                            //Check if player is above us and jump
                            if (enemyToFollow.t.position.y > t.position.y && enemyToFollow.t.position.y - t.position.y > pc2d.playerDimensions.y * 0.95f)
                            {
                                if (Random.Range(-5, 10) > 0)
                                {
                                    StartCoroutine(DoJump());
                                }
                            }
                            //

                            pc2d.Attack();

                            if (botDifficulty == BotDifficulty.Easy)
                            {
                                attackTimer = 0;
                                nextAttackTime = Random.Range(0.25f, 0.95f);
                            }
                            if (botDifficulty == BotDifficulty.Medium)
                            {
                                attackTimer = 0;
                                nextAttackTime = Random.Range(0.01f, 0.37f);
                            }
                            if (botDifficulty == BotDifficulty.Hard)
                            {
                                attackTimer = 0;
                                nextAttackTime = Random.Range(0.01f, 0.24f);
                            }
                        }
                        else
                        {
                            attackTimer += Time.deltaTime;
                        }


                        if (enemyToFollow && !checkingTotalEnemies)
                        {
                            if (enemyToFollow.t.position.x > t.position.x && !pc2d.facingRight)
                            {
                                pc2d.facingRight = true;
                            }
                            if (enemyToFollow.t.position.x < t.position.x && pc2d.facingRight)
                            {
                                pc2d.facingRight = false;
                            }

                            attackingFromLeft = 0;
                            attackingFromRight = 0;

                            //Check if there too many player attacking us and run away
                            for (int i = 0; i < detectedPlayers.Length; i++)
                            {
                                if (detectedPlayers[i])
                                {
                                    BotController2D bcTmp = detectedPlayers[i].GetComponent<BotController2D>();
                                    if (bcTmp && bcTmp.botType != botType && bcTmp.enemyToFollow == pc2d && bcTmp.currentState == CurrentState.Attack)
                                    {
                                        if (bcTmp.t.position.x > t.position.x)
                                        {
                                            attackingFromRight++;
                                        }
                                        else
                                        {
                                            attackingFromLeft++;
                                        }
                                    }
                                }
                            }

                            //If the value playerHP from PlayerController2D get too low, and the bot is being attacked, increase the probability to run away
                            if (attackingFromRight >= 2 || attackingFromLeft >= 2 || (pc2d.playerHP < 70 && botDifficulty == BotDifficulty.Hard && (attackingFromRight > 0 || attackingFromLeft > 0)) || (pc2d.playerHP < 40 && botDifficulty == BotDifficulty.Medium && (attackingFromRight > 0 || attackingFromLeft > 0)))
                            {
                                StartCoroutine(CheckEnemiesEnumerator(attackingFromLeft, attackingFromRight, false));
                            }
                        }
                    }
                }
            }
        }

        if (pc2d.currentLadder && (previousLadder != pc2d.currentLadder || previousCanGoDownOnLadder != pc2d.canGoDownOnLadder || previousCanClimbLadder != pc2d.canClimbLadder))
        {
            previousLadder = pc2d.currentLadder;
            previousCanGoDownOnLadder = pc2d.canGoDownOnLadder;
            previousCanClimbLadder = pc2d.canClimbLadder;

            if (!pc2d.isAttachedToLadder)
            {
                if (pc2d.canClimbLadder)
                {
                    encounteredLadders++;

                    if ((lastAttachedLadder != pc2d.currentLadder || encounteredLadders > 1) && !statePause)
                    {
                        if (Random.Range(-10, 10) > 0)
                        {
                            if (pc2d.canGoDownOnLadder)
                            {
                                StartCoroutine(StatePause(CurrentState.GoingDownLadder, true));
                            }
                            else
                            {
                                StartCoroutine(StatePause(CurrentState.GoinUPLadder, true));
                            }
                        }
                    }
                }
            }
            else
            {
                encounteredLadders = 0;
                lastAttachedLadder = pc2d.currentLadder;
            }
        }

        trVelocity = ((t.position - previousPos).magnitude) / Time.deltaTime;
        previousPos = t.position;

        if (trVelocity < 0.01f && !statePause)
        {
            timeMotionless += Time.deltaTime;

            if (timeMotionless > 0.5f)
            {
                StartCoroutine(StatePause(CurrentState.Idle, true));
            }
        }
        else
        {
            timeMotionless = 0;
        }

        //Detect and attack enemy players
        detectedPlayers = Physics2D.OverlapCircleAll(t.position, cameraWidth, playerLayerMask);

        if (!enemyToFollow)
        {
            if (!runAway)
            {
                if (previousDetectedPlayers.Length != detectedPlayers.Length || (previousDetectedPlayers.Length > 0 && detectedPlayers.Length > 0 && previousDetectedPlayers[0] != detectedPlayers[0]))
                {
                    previousDetectedPlayers = detectedPlayers;

                    for (int i = 0; i < detectedPlayers.Length; i++)
                    {
                        BotController2D bcTmp = detectedPlayers[i].GetComponent<BotController2D>();
                        PlayerController2D pc2dTmp = null;
                        if (!bcTmp)
                        {
                            pc2dTmp = detectedPlayers[i].GetComponent<PlayerController2D>();
                        }
                        if ((pc2dTmp && botType == BotType.Enemy) || (bcTmp && bcTmp.botType != botType))
                        {
                            Vector3 enemyPos = bcTmp ? bcTmp.t.position : pc2dTmp.t.position;
                            float yDistance = Mathf.Abs(enemyPos.y - t.position.y);
                            if (yDistance < pc2d.playerDimensions.y * 2)
                            {
                                if (!enemyToFollow || Mathf.Abs(enemyPos.x - t.position.x) < Mathf.Abs(enemyToFollow.t.position.x - t.position.x))
                                {
                                    enemyToFollow = bcTmp ? bcTmp.pc2d : pc2dTmp;
                                    appliedState = InitialState.Explore;
                                }
                            }

                        }
                    }
                }
            }
        }
        else
        {
            float yDistance = enemyToFollow.t.position.y - t.position.y;
            float xDistance = enemyToFollow.t.position.x - t.position.x;
            if (Mathf.Abs(yDistance) >= pc2d.playerDimensions.y * 2 || Mathf.Abs(xDistance) > cameraWidth || !enemyToFollow.enabled)
            {
                enemyToFollow = null;
            }
            else
            {
                if (Mathf.Abs(xDistance) > pc2d.playerDimensions.x * 1.45f)
                {
                    if (!statePause && pc2d.botVerticalMovement == 0)
                    {
                        if (xDistance > 0)
                        {
                            if (currentState != CurrentState.MovingRight)
                            {
                                statePauseCoroutine = StartCoroutine(StatePause(CurrentState.MovingRight, false));
                            }
                        }
                        else if (xDistance < 0)
                        {
                            if (currentState != CurrentState.MovingLeft)
                            {
                                statePauseCoroutine = StartCoroutine(StatePause(CurrentState.MovingLeft, false));
                            }
                        }
                    }
                    else
                    {
                        StopPauseCoroutine();
                    }
                }
                else
                {
                    if (pc2d.botVerticalMovement == 0)
                    {
                        if (currentState != CurrentState.Attack)
                        {
                            if (!statePause)
                            {
                                statePauseCoroutine = StartCoroutine(StatePause(CurrentState.Attack, true));
                            }
                        }
                        else
                        {
                            if (Mathf.Abs(xDistance) < pc2d.playerDimensions.x / 3 && !checkingTotalEnemies)
                            {
                                //print("Enemies are too close!!!");
                                StartCoroutine(CheckEnemiesEnumerator(attackingFromLeft, attackingFromRight, true));
                            }
                        }
                    }
                }
            }
        }
    }

    Coroutine statePauseCoroutine = null;

    void StopPauseCoroutine()
    {
        if (statePauseCoroutine != null)
        {
            StopCoroutine(statePauseCoroutine);
            statePauseCoroutine = null;
            statePause = false;
        }
    }

    IEnumerator StatePause(CurrentState newState, bool stopMovement)
    {
        //print("State pause");
        statePause = true;
        if (stopMovement)
        {
            pc2d.botMovement = 0;
            pc2d.botVerticalMovement = 0;
        }
        currentState = newState;

        if (newState == CurrentState.Attack && botDifficulty == BotDifficulty.Hard)
        {
            yield return new WaitForSeconds(Random.Range(0.15f, 0.45f));
        }
        else
        {
            yield return new WaitForSeconds(Random.Range(0.45f, 0.75f));
        }


        statePause = false;
    }

    IEnumerator DoJump()
    {
        //print("Do jump");
        statePause = true;
        pc2d.botJump = true;

        yield return new WaitForSeconds(0.65f);

        statePause = false;
    }

    IEnumerator CheckEnemiesEnumerator(int attackingFromLeft, int attackingFromRight, bool doNotRunAway)
    {
        checkingTotalEnemies = true;

        //print("CHECKING FOR TOTAL ENEMIES");

        yield return new WaitForSeconds(Random.Range(0.27f, 0.75f));

        if (Random.Range(-10, 10) > 0)
        {
            runAway = true;
            enemyToFollow = null;

            if (attackingFromLeft > attackingFromRight)
            {
                currentState = CurrentState.MovingRight;
            }
            else
            {
                currentState = CurrentState.MovingLeft;
            }
        }

        checkingTotalEnemies = false;

        if (runAway)
        {
            if (doNotRunAway)
            {
                //Simply walk away a bit
                yield return new WaitForSeconds(Random.Range(0.37f, 0.75f));
            }
            else
            {
                //Run away
                yield return new WaitForSeconds(Random.Range(1.57f, 2.45f));
            }


            runAway = false;
        }
    }

    public static Vector2 ColliderDimensions(Collider2D sp)
    {
        return new Vector2(sp.bounds.max.x - sp.bounds.min.x, sp.bounds.max.y - sp.bounds.min.y);
    }
}

Schritt 2: Richten Sie den Spieler und die Feinde ein

Jetzt ist es an der Zeit, unseren Spieler und die gegnerische KI mithilfe der oben genannten Skripte einzurichten.

Einrichten unserer Player-Instanz

• Erstellen Sie ein neues GameObject und benennen Sie es "Player"
• Ändern Sie das Tag dieses Objekts in "Player"
• Ändern Sie die Ebene des Objekts in 8 (wenn in der Auswahl keine Ebene 8 vorhanden ist, fügen Sie eine hinzu, indem Sie auf Ebene hinzufügen... klicken und ihr den Namen "Player" geben).
• Erstellen Sie ein weiteres GameObject, nennen Sie es "Body" und fügen Sie eine SpriteRenderer-Komponente hinzu
• Weisen Sie Ihr Spieler-Sprite einem "Body" zu und verschieben Sie es innerhalb des "Player"-Objekts
• Wählen Sie das Objekt "Player" aus und fügen Sie die Komponenten CapsuleCollider2D, Rigidbody2D und PlayerController2D hinzu
• Skalieren Sie den CapsuleCollider2D, bis er zum Player-Sprite passt

Wie Sie sehen, verfügt PlayerController2D über einige Variablen. Die meisten davon sind selbsterklärend, eine davon bedarf jedoch einer kleinen Erklärung:

PlayerHP – dieser Wert wird in BotController2D verwendet, um zu entscheiden, ob die KI weglaufen soll, wenn ihre HP zu niedrig sind.

Verwenden Sie die PlayerHP-Variable, wenn Sie die Angriffsfunktion implementieren (überprüfen Sie void Attack() am Ende des PlayerController2D.cs-Skripts).

Einrichten der Player-Kamera

• Wählen Sie die Hauptkamera aus und fügen Sie die CameraFollow2D-Komponente hinzu
• Weisen Sie den Spieler der Zielvariablen zu
• Optional können Sie die Offset-Variable anpassen (wenn Sie nicht möchten, dass die Kamera genau in der Mitte zentriert ist).

Eine Leiter aufstellen

PlayerController2D unterstützt auch kletterbare Leitern.

Der Aufbau einer neuen Leiter ist ganz einfach:

• Erstellen Sie ein neues GameObject und nennen Sie es "Ladder"
• Ändern Sie die Ebene in "IgnoreRaycast"
• Erstellen Sie ein weiteres Spielobjekt mit einem SpriteRenderer, weisen Sie ein Sprite Ihrer Leiter zu und verschieben Sie es innerhalb des Leiterobjekts
• Fügen Sie die Komponenten BoxCollider2D und Ladder2D zum Objekt "Ladder" hinzu
• Skalieren Sie die Collider-Abmessungen so, dass sie mit dem Leiter-Sprite übereinstimmen, und markieren Sie es als Trigger

Einrichten der feindlichen KI

• Gehen Sie zunächst zum Physics2D-Bedienfeld und deaktivieren Sie eine Kollision zwischen der Player-Ebene, damit die Bots und Spieler nicht untereinander hängen bleiben.

• Duplizieren Sie die Player-Instanz
• Fügen Sie eine BotController2D-Komponente hinzu
• Der Bot ist jetzt bereit

Schauen Sie sich das Video unten an, um die feindliche KI in Aktion zu sehen (Die weiße Instanz ist unser Spieler, rote Instanzen werden von der KI gesteuert):