how to create a simple AI enemy that shoot to my player

[mangohack]

how to create a simple AI enemy that shoot to my player when he is near to the enemy

[system]

I have two scripts that might help. The first is a simple gun turret with an animation when it shoots. The gun turret looks at the player and only fires when the player is in proximity.

The second is a script that makes an enemy follow waypoints unless the character is in a certain proximity. When the player gets close it changes the colour of the enemy and makes it peruse.

    var player : Transform;
var safeDist : float = 15;
var currentDist : float;
var shooting : boolean = false;
var bang : AudioClip;
var bulletFab : Rigidbody;
var gunTip : Transform;
var power : float = 1000;
var shotDelay : float = 1;

function Update () {
	
	currentDist = Vector3.Distance(transform.position, player.position);
	
	if(currentDist < safeDist){
	transform.LookAt(player);
	if(!shooting) shootStuff();
	
	}
		
}

function shootStuff(){
	
	shooting = true;
	
	transform.parent.animation.Play("shoot"); //play animation	
	
	AudioSource.PlayClipAtPoint(bang, transform.position);
	
	var fwd = transform.TransformDirection(Vector3.forward);
	var bulletShot : Rigidbody = Instantiate(bulletFab, gunTip.position, gunTip.rotation);
	bulletShot.AddForce(fwd * power);
	
	yield WaitForSeconds(shotDelay);
	shooting = false;
	

}

function OnGUI(){

	GUILayout.BeginArea(Rect(10,10, 100, 100));
	GUILayout.BeginVertical("box");
	GUILayout.Label("Distance is: " + currentDist.ToString("f1"));
	
	GUILayout.EndVertical();
	GUILayout.EndArea();

<---- END OF FIRST SCRIPT ---->

<---- SECOND SCRIPT ---->

var waypoints : Transform [];
var currentPoint : int = 0;

var state : String = "patrol";
var speed : float = 10;
var chaseDist : float = 15;
var gravity : float = 15;

private var controller : CharacterController;
private var player : Transform;
private var alert : ParticleEmitter;

function Start(){
	alert = gameObject.Find("alert").particleEmitter;
	player = gameObject.FindWithTag("Player").transform;
	controller = GetComponent(CharacterController);	
}

function Update () {
	
	var playerDist = Vector3.Distance(player.position, transform.position); //vector 3.dist finds distances between things
	
	if (playerDist <= chaseDist){
		state = "chase";	
	}else{
		state = "patrol";
	}
	
	if(state == "patrol"){
		alert.emit = false;
		renderer.material.color = Color.green;
		
		if(currentPoint < waypoints.length) {
			Mover(waypoints[currentPoint].position);	
		}
		
	} else if (state == "chase"){
		alert.emit = true;
		renderer.material.color = Color.red;
		Mover(player.position);
	}
}

function Mover(target : Vector3){

	var diffVector: Vector3 = target - transform.position;
	
	var movement : Vector3;
	
	if(diffVector.magnitude > 1){
	 movement = (diffVector.normalized * speed);//without this it will run toward something and slow down when it gets close.	
	 
	}else{
		currentPoint = (currentPoint + 1) % waypoints.length;
		
	}
	
	movement.y -= gravity * Time.deltaTime;
	controller.Move(movement * Time.deltaTime);
	
	transform.LookAt(target);
	
}

ALl you have to do is combine these and that’s some very basic but useful AI.
Enjoy

[anon46463775]

There are several video tutorials on youtube, as well as some written tutorials.

Google search yields:

http://www.youtube.com/watch?v=POUbAsr-6q4

http://www.youtube.com/watch?v=oytm0eYCQw4

Just have to search for exactly what you want, or be more specific as to what you are unable to find.