Simple Raycasting AI

Hey guys,

I want to create a simple Raycasting based AI. But i don't know how to do it

I have a simple AI script which tells my enemy where he should go and where he should look at:

using UnityEngine;
using System.Collections;

public class AIFollower : MonoBehaviour
{
public GameObject target;
public float speed;
public float rotateSpeed;
public float minDistance;
public float viewDistance;
public float fromCenterToSurface;
public float fallSpeed;
public float range;
public int currentDamage;
public Transform attackDot;
public float attackTimer;
public float coolDown = 2.0f;
private bool playerSpotted = false;
private Vector3 lastPlayerPos = Vector3.zero;

// Use this for initialization
void Start ()
{
target = GameObject.FindWithTag("Player");
}

// Update is called once per frame
void Update ()
{
if(attackTimer > 0)
attackTimer -= Time.deltaTime;

if(attackTimer < 0)
attackTimer = 0;


Walk(target.transform.position);
RotateTo(target.transform.position);

SurfaceDetection();
}

void Walk (Vector3 targetPosition)
{
Vector3 velocity;
Vector3 moveDirection = transform.TransformDirection(Vector3.forward);

Vector3 delta = targetPosition - transform.position;

if (delta.magnitude > minDistance delta.magnitude <= viewDistance)
{
velocity = moveDirection.normalized * speed * Time.deltaTime;
}
else
{
velocity = Vector3.zero;

if(attackTimer == 0)
{
Attack(range, currentDamage, attackDot.position);
attackTimer = coolDown;
}
}

rigidbody.velocity = velocity;
}

void RotateTo (Vector3 targetPosition)
{
Quaternion destRotation;
Vector3 relativePos;
//relativePos = targetPosition - transform.position;

Vector3 tap;
Vector3 trp;
tap = targetPosition;
trp = transform.position;
tap.y = 0;
trp.y = 0;
relativePos = tap - trp;

destRotation = Quaternion.LookRotation(relativePos);
transform.rotation = Quaternion.Slerp(transform.rotation, destRotation, rotateSpeed * Time.deltaTime);
}

void SurfaceDetection ()
{
RaycastHit hit;

if (Physics.Raycast(transform.position, -Vector3.up, out hit, fromCenterToSurface))
{

}
else
{
rigidbody.velocity = rigidbody.velocity + (-Vector3.up * fallSpeed * Time.deltaTime);
}

Debug.DrawRay(transform.position, -Vector3.up * fromCenterToSurface, Color.red);
}

void Attack(float attackRange, int damage, Vector3 attackPoint)
{
Vector3 forward = transform.TransformDirection(Vector3.forward);
RaycastHit hit;

if (Physics.Raycast(attackPoint, forward, out hit, attackRange))
{
if (hit.transform.gameObject.tag == "Player")
{
hit.transform.gameObject.GetComponent<PlayerHealth>().AdjustHealth(currentDamage);
}
}
}
}

Can someone tell me what i must write to give the enemy pathfinding? This will be really nice

Thanks
BusterBlader

 

Sorry...i don't know how to give the script

Code (csharp):

1. -Tags :S

 

Code (csharp):

1.  
2.  
3. using UnityEngine;
4. using System.Collections;
5.  
6. public class AIFollower : MonoBehaviour
7. {
8.     public GameObject target;
9.     public float speed;
10.     public float rotateSpeed;
11.     public float minDistance;
12.     public float viewDistance;
13.     public float fromCenterToSurface;
14.     public float fallSpeed;
15.     public float range;
16.     public int currentDamage;
17.     public Transform attackDot;
18.     public float attackTimer;
19.     public float coolDown = 2.0f;
20.     private bool playerSpotted = false;
21.     private Vector3 lastPlayerPos = Vector3.zero;
22.  
23.     // Use this for initialization
24.     void Start ()
25.     {
26.         target = GameObject.FindWithTag("Player");
27.     }
28.  
29.     // Update is called once per frame
30.     void Update ()
31.     {
32.         if(attackTimer > 0)
33.             attackTimer -= Time.deltaTime;
34.  
35.         if(attackTimer < 0)
36.             attackTimer = 0;
37.  
38.  
39.         Walk(target.transform.position);
40.         RotateTo(target.transform.position);
41.  
42.         SurfaceDetection();
43.     }
44.  
45.     void Walk (Vector3 targetPosition)
46.     {
47.         Vector3 velocity;
48.         Vector3 moveDirection = transform.TransformDirection(Vector3.forward);
49.  
50.         Vector3 delta = targetPosition - transform.position;
51.  
52.         if (delta.magnitude > minDistance  delta.magnitude <= viewDistance)
53.         {
54.             velocity = moveDirection.normalized * speed * Time.deltaTime;
55.         }
56.         else
57.         {
58.             velocity = Vector3.zero;
59.  
60.             if(attackTimer == 0)
61.             {
62.                 Attack(range, currentDamage, attackDot.position);
63.                 attackTimer = coolDown;
64.             }
65.         }
66.  
67.         rigidbody.velocity = velocity;
68.     }
69.  
70.     void RotateTo (Vector3 targetPosition)
71.     {
72.         Quaternion destRotation;
73.         Vector3 relativePos;
74.         //relativePos = targetPosition - transform.position;
75.  
76.         Vector3 tap;
77.         Vector3 trp;
78.         tap = targetPosition;
79.         trp = transform.position;
80.         tap.y = 0;
81.         trp.y = 0;
82.         relativePos = tap - trp;
83.  
84.         destRotation = Quaternion.LookRotation(relativePos);
85.         transform.rotation = Quaternion.Slerp(transform.rotation, destRotation, rotateSpeed * Time.deltaTime);
86.     }
87.  
88.     void SurfaceDetection ()
89.     {
90.         RaycastHit hit;
91.  
92.         if (Physics.Raycast(transform.position, -Vector3.up, out hit, fromCenterToSurface))
93.         {
94.  
95.         }
96.         else
97.         {
98.             rigidbody.velocity = rigidbody.velocity + (-Vector3.up * fallSpeed * Time.deltaTime);
99.         }
100.  
101.         Debug.DrawRay(transform.position, -Vector3.up * fromCenterToSurface, Color.red);
102.     }
103.  
104.     void Attack(float attackRange, int damage, Vector3 attackPoint)
105.     {
106.         Vector3 forward = transform.TransformDirection(Vector3.forward);
107.         RaycastHit hit;
108.  
109.         if (Physics.Raycast(attackPoint, forward, out hit, attackRange))
110.         {
111.             if (hit.transform.gameObject.tag == "Player")
112.             {
113.                 hit.transform.gameObject.GetComponent<PlayerHealth >().AdjustHealth(currentDamage);
114.             }
115.         }
116.     }
117. }
118.  

 

Thanks for posting it with Tags But my problem is still there Please help I want the enemies to avoid obstacles