95 lines
2.7 KiB
C#
95 lines
2.7 KiB
C#
using UnityEngine;
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using System.Collections;
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#if UNITY_5_5_OR_NEWER
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using UnityEngine.AI;
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#endif
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namespace Com.LuisPedroFonseca.ProCamera2D.TopDownShooter
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{
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public class EnemyAttack : MonoBehaviour
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{
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public float RotationSpeed = 2f;
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public Pool BulletPool;
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public Transform WeaponTip;
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public float FireRate = .3f;
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public float FireAngleRandomness = 10f;
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bool _hasTarget;
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Transform _target;
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NavMeshAgent _navMeshAgent;
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Transform _transform;
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void Awake()
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{
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_transform = transform;
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_navMeshAgent = this.GetComponentInChildren<NavMeshAgent>();
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}
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public void Attack(Transform target)
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{
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_navMeshAgent.updateRotation = false;
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_target = target;
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_hasTarget = true;
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StartCoroutine(LookAtTarget());
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StartCoroutine(FollowTarget());
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StartCoroutine(Fire());
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}
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public void StopAttack()
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{
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_navMeshAgent.updateRotation = true;
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_hasTarget = false;
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}
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IEnumerator LookAtTarget()
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{
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while (_hasTarget)
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{
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var lookAtPos = new Vector3(_target.position.x, _transform.position.y, _target.position.z);
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var diff = lookAtPos - _transform.position;
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var newRotation = Quaternion.LookRotation(diff, Vector3.up);
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_transform.rotation = Quaternion.Slerp(_transform.rotation, newRotation, RotationSpeed * Time.deltaTime);
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yield return null;
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}
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}
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IEnumerator FollowTarget()
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{
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while (_hasTarget)
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{
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var rnd = Random.insideUnitCircle;
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_navMeshAgent.destination = _target.position - (_target.position - _transform.position).normalized * 5f + new Vector3(rnd.x, 0, rnd.y);
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yield return null;
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}
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}
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IEnumerator Fire()
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{
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while (_hasTarget)
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{
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var bullet = BulletPool.nextThing;
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bullet.transform.position = WeaponTip.position;
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bullet.transform.rotation = _transform.rotation * Quaternion.Euler(new Vector3(0, -90 + Random.Range(-FireAngleRandomness, FireAngleRandomness), 0));
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yield return new WaitForSeconds(FireRate);
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}
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}
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public static Vector2 RandomOnUnitCircle2(float radius)
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{
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Vector2 randomPointOnCircle = Random.insideUnitCircle;
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randomPointOnCircle.Normalize();
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randomPointOnCircle *= radius;
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return randomPointOnCircle;
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}
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}
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} |