Unity3D AI人工智能（坦克模型自动寻怪，自动追击）

功能：

1，坦克自动旋转炮管，自动瞄准

2，在坦克的射程之内自动开炮

3，坦克自动向你追击

unity3d脚本：

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01.var Enemy_tank: GameObject; //定义坦克

02.var firepoint: Transform; //定义开火点

03.var bullet: Rigidbody; //定义子弹

04.var bullspeed: int=50; //定义子弹速度

05.var attackRange = 100.0; //定义距离

06.var target : Transform;//定义共计目标

07.//static var value : float ;

08.private var cun_time: int=0;

09.function Start () //初始化目标

10.{

11.if (target == null && GameObject.FindWithTag("hero")) target = GameObject.FindWithTag("hero").transform;

12.}

13.function Update ()

14.{

15.//Tank Fire

16.// cun_time++;

17.// if(cun_time==260)

18.// {

19.// var clone : Rigidbody;

20.// clone = Instantiate(bullet, firepoint.transform.position, firepoint.transform.rotation);

21.// clone.velocity = transform.TransformDirection (Vector3.right*bullspeed);

22.// cun_time=0;

23.// }

24.//distance from A and B

25.//angle from A and B

26.//var targetDir = transform.position-other.position;

27.//var right = transform.right;

28.//var angle = Vector3.Angle(targetDir, right);

29.//print("angle is ="+angle);//if (angle < 5.0)//transform.Rotate(Vector3.up*0.5);

30.//var speed = 0.1;

31.//transform.rotation =Quaternion.Slerp (from.rotation, to.rotation, Time.time * speed);

32.

33.

34.Enemy_tank=GameObject.Find("Enemy_barrel"); //实例化

35.if (target == null)

36.return;

37.if (!CanSeeTarget ())

38.return;

39.// Rotate towards target

40.var targetPoint = target.position;

41.var targetRotation = Quaternion.LookRotation (targetPoint - Enemy_tank.transform.position,Vector3.up); //求出与目标之间的角度

42.Enemy_tank.transform.rotation = Quaternion.Slerp(Enemy_tank.transform.rotation, targetRotation, Time.deltaTime * 2.0); //旋转之角度与目标对齐

43.//If we are almost rotated towards target - fire one clip of ammo

44.var forward = Enemy_tank.transform.TransformDirection(Vector3.forward);

45.var targetDir =Enemy_tank.transform.position-target.position; //求出2者之间的距离

46.if((Vector3.Angle(forward, targetDir) <10.0)||((Vector3.Angle(forward, targetDir) >-10.0))) //这边是自动开炮的效果

47.{

48.cun_time++;

49.if(cun_time==260)

50.{

51.var clone : Rigidbody;

52.clone = Instantiate(bullet, firepoint.transform.position, firepoint.transform.rotation);

53.clone.velocity = Enemy_tank.transform.TransformDirection (Vector3.forward*bullspeed);

54.cun_time=0;

55.}

56.}

57.if((Vector3.Distance(transform.position, target.position) < attackRange)) //发现目标而且在范围之内，开始追击目标

58.{

59.var targetPoint1 = target.position;

60.//Calculation the angle with target

61.var targetRotation1 = Quaternion.LookRotation (targetPoint1 - transform.position,Vector3.up);

62.//Rotated Itself then make a line with target

63.transform.rotation = Quaternion.Slerp(transform.rotation, targetRotation1, Time.deltaTime * 1.0);

64.transform.Translate(Vector3.forward*0.05);

65.}

66.}

67.function CanSeeTarget (): System.Boolean //计算是否被发现

68.{

69.if (Vector3.Distance(transform.position, target.position) > attackRange) return false;

70.var hit : RaycastHit; if (Physics.Linecast (transform.position, target.position, hit))

71.return hit.transform == target; return false;

72.}