Unity3d RPG implementation (medium)

Set the basic attributes and status of the enemy

download rpg monster Package and import , Then we need to update the material . And write the code .

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.AI;

public enum EnemyStates { GUARD,PATROL,CHASE,DEAD}
[RequireComponent(typeof(NavMeshAgent))]
public class EnemyController : MonoBehaviour
{
    public EnemyStates enemyStates;
    private NavMeshAgent agent;
    // Start is called before the first frame update
    void Start()
    {
        agent = GetComponent<NavMeshAgent>();
    }

    // Update is called once per frame
    void Update()
    {
        SwitchState();
    }
    void SwitchState()// Realize a simple state switch 
    {
        switch (enemyStates)
        {
            case EnemyStates.GUARD:
                break;
            case EnemyStates.PATROL:
                break;
            case EnemyStates.CHASE:
                break;
            case EnemyStates.DEAD:
                break;
        }
    }
}

add to tag and layer.

  It is necessary to realize occlusion elimination for the enemy , So in pipeline Except player More than a enemy that will do .

Attack the enemy

Set another click event ：

  stay playerController Register the function in ：

MoveToEnemy Functions like this can be used alt+enter fill

have access to alt+enter Realization

Add attack animation to players , Note that the switch from attack to running must be exit time Set to 1, Only in this way can the animation be played . 

 StopAllCoroutines();// So that the character can also click to go to other places in the process of moving towards the goal , Interrupt operation
        agent.isStopped = false;// Add this sentence , It solves the problem that characters cannot act once they attack

Later on playercontroller Code to move towards the enemy after the attack ：

void EventAttack(GameObject target)
    {

        if (target != null)
        {
            attackTarget = target;
            StartCoroutine(MoveToAttackTarget());
        }
    }

    IEnumerator MoveToAttackTarget()
    {
        // In order to prevent the next time after this click agent Unable to act , Use recovery at the beginning of this click 
        agent.isStopped = false;
        transform.LookAt(attackTarget.transform);
        while (Vector3.Distance(transform.position, attackTarget.transform.position) > 1)
        {
            agent.destination = attackTarget.transform.position;
            yield return null;
        }
        // When arriving at the designated place , command agent stop it 
        agent.isStopped = true;

        // The attack has cd Time 
        if (lastAttackTime < 0)
        {
            animator.SetTrigger("Attack");
            lastAttackTime = 0.5f;
        }
    }

}

The way to go to the enemy is through coordination , Join in lastAttackTime Used to attack cd The cooling of .

Because the navigation system comes with destination It's going to keep moving , So we need to realize when the distance is 1 When you stop moving, use agent

isStopped by true To execute . Corresponding , The initial needs of this process are set isStop by false.

bug：

After executing the above code, you will find , Once the character attacks the enemy, he can no longer move by clicking on the ground , This is because isStopped Set up in order to false, So you need to click on the ground to move

effect ：

（ The mouse pointer cannot be displayed ）

here MouseManger

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.Events;
using System;

//[System.Serializable]
//public class EventVector3 : UnityEvent<Vector3> { }// Declare an event 
public class MouseManager : MonoBehaviour
{
    //public EventVector3 OnMouseClicked;
    public event Action<Vector3> OnMouseClicked;
    public event Action<GameObject> OnEnemyClicked;

    RaycastHit hitInfo;

    public static MouseManager Instance;

    public Texture2D point, doorway, attack, target, arrow;
    private void Awake()
    {
        if (Instance != null) Destroy(gameObject);
        Instance = this;
    }
    private void Update()
    {
        SetCursorTexture();
        MouseControl();
    }
    void SetCursorTexture()
    {
        Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition);// Get rays 
        // Output the ray information to hitInfo
        if (Physics.Raycast(ray, out hitInfo)) {
            switch (hitInfo.collider.gameObject.tag)
            {
                case "Ground":
                    Cursor.SetCursor(target, new Vector2(16,16), CursorMode.Auto);
                    break;
                case "Enemy":
                    Cursor.SetCursor(attack, new Vector2(16, 16), CursorMode.Auto);
                    break;
            }
        }
    }
    void MouseControl()
    {
        if (Input.GetMouseButtonDown(0) && hitInfo.collider != null)
        {
            if (hitInfo.collider.CompareTag("Ground"))
            {
                OnMouseClicked?.Invoke(hitInfo.point);
                // Click to send the location to OnMouseClicked This event registers the function and calls 
            }
            if (hitInfo.collider.CompareTag("Enemy"))
            {
                OnEnemyClicked?.Invoke(hitInfo.collider.gameObject);
                // Click to send the location to OnMouseClicked This event registers the function and calls 
            }
        } 
    }
}

Time setting isStopped by true.

And then there's another one bug, Cannot move when entering the state of attacking the enemy , You can only move after the attack , Add here ：

 

Then you can attack the enemy ：

Camera's Freelook

First the cvm Turn off the , Enable cinemachine Medium freelook

Drag the character in , At this point, you can see three red circles

There are three circles , It means that the camera can rotate freely in these three dimensions ：

 

Running the game can realize the perspective switching of the scene .

We will y The movement of the axis is realized with the mouse wheel （ This name comes from setting Inside input manager Name setting in ）

  Change the size of three circles

The actual use effect of the three circles is as follows :

 

If you want to keep the value in the modification ：

If you want the camera to follow the direction of the person when the person moves, you can modify bindingmode：

Here is a small detail , Add some TODO:  FIXME: As a to-do  

 

The pursuit of the enemy

Add code to detect players for enemies ：

    bool FoundPlayer()
    {
        var colliders = Physics.OverlapSphere(transform.position, sightRadius);

        foreach(var target in colliders)
        {
            if (target.CompareTag("Player"))
            {
                return true;
            }
        }

        return false;
    }

Call when switching state ：

Don't forget to add collision bodies to players

add , We are here for hierarchy Medium player and enemy It's been modified , Want these changes to cover project The inside can be used override.

 

Next, we'll implement chase, Before writing, you can record what you want to do in this way , Convenient sorting logic .