484 lines
16 KiB
C#
484 lines
16 KiB
C#
using UnityEngine;
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using System.Collections;
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using System.Collections.Generic;
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using Pathfinding;
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using System.Threading.Tasks;
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using System;
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using System.Linq;
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using System.Text;
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//Designed by Jacob Weedman
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//V 0.0.1
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//DO NOT USE ON ANY ENEMIES
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public class TestEnemyAIDroneRanged : MonoBehaviour
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{
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//MISC
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GameObject target;
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float nextWaypointDistance = 5;
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Path path;
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int currentWaypoint = 0;
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bool reachedEndOfPath = false;
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GameObject projectile;
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GameObject player;
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GameObject barrel;
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public List<GameObject> AllPositions;
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float DistanceFromPlayer;
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Vector2 StartPosition;
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GameObject LastKnownPlayerLocation;
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Transform DroneBayLocation;
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//CONDITIONS/GENERAL INFORMATION
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public bool canMove = false;
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public bool canPursue = false;
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public bool canFire = true;
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public bool currentlyReloading = false;
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public bool currentlyInDroneBay = true;
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public float DesiredDistance;
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public float MinumumDistance = 10f;
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public bool targetingPlayer = false;
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public bool inFiringCycle = false;
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public int WeaponCurrentMagazineAmmount;
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public int NumberOfHitsPerMag = 0;
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public int CurrentBatteryCapacity;
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public bool currentlyTravelingToDroneBay = false;
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public bool currentlyRecharging = false;
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public float angle;
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//ENEMY STATS (Changeable)
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public float Speed = 0.7f; // In relation to player's walking speed
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public float Health = 100;
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public int PlayerDetectionRange = 25;
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public int MaxBatteryCapacity = 30; // Depletes one every second it is out of the bay
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public int RechargeTime = 6000; //ms
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//WEAPON STATS (CHANGEABLE)
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public int WeaponDamage = 5; // Damage per hit
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public int WeaponFireRate = 100; // Delay in time between attacks both melee and ranged
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public float WeaponRandomSpread = 5f; // Random direction of lanched projectiles (DOES NOT APPLY TO MELEE ATTACKS)
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public int WeaponRange = 30; // Maximum range of the projectile before it drops off (DOES NOT APPLY TO MELEE ATTACKS)
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public float WeaponProjectileSpeed = 30f; // Speed of launched projectiles (DOES NOT APPLY TO MELEE WEAPONS)
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public int WeaponMagazineSize = 50; // Number of shots the enemy will take before having to reload
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public int WeaponReloadTime = 5000; // Time it takes to reload the magazine
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Seeker seeker;
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Rigidbody2D rb;
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// Start is called once before the first execution of Update after the MonoBehaviour is created
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void Start()
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{
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seeker = GetComponent<Seeker>();
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rb = GetComponent<Rigidbody2D>();
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transform.Find("ReloadingIndicator").GetComponent<SpriteRenderer>().enabled = false;
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transform.Find("PursuingIndicator").GetComponent<SpriteRenderer>().enabled = false;
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transform.Find("BatteryIndicator").GetComponent<SpriteRenderer>().enabled = false;
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StartPosition = transform.position;
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AllPositions = GameObject.FindGameObjectsWithTag("PossiblePositions").ToList();
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target = Instantiate(GameObject.Find("FlyingTarget"), transform.position, Quaternion.identity);
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projectile = GameObject.Find("EnemyProjectile");
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player = GameObject.FindGameObjectWithTag("Player");
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barrel = transform.Find("Barrel").gameObject;
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LastKnownPlayerLocation = null;
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DroneBayLocation = transform.parent.transform;
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WeaponCurrentMagazineAmmount = WeaponMagazineSize;
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DesiredDistance = WeaponRange - 5;
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CurrentBatteryCapacity = MaxBatteryCapacity;
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InvokeRepeating("UpdatePath", 0f, 0.1f);
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InvokeRepeating("PathfindingTimeout", 0f, 30);
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InvokeRepeating("BatteryDrain", 0f, 1);
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Recharge();
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}
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// When enemy has reached the next node
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void OnPathComplete(Path p)
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{
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if (!p.error)
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{
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path = p;
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currentWaypoint = 0;
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}
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}
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// Select next node
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void UpdatePath()
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{
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if (seeker.IsDone())
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{
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seeker.StartPath(rb.position, target.transform.position, OnPathComplete);
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}
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}
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// Pathfiniding Timeout
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void PathfindingTimeout()
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{
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if (Vector2.Distance(transform.position, target.transform.position) > 0.5)
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{
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//target = gameObject;
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targetingPlayer = false;
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LastKnownPlayerLocation = null;
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//ReturnToDroneBay();
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}
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}
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// Battery Drain
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void BatteryDrain()
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{
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if (currentlyInDroneBay == false)
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{
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CurrentBatteryCapacity -= 1;
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}
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}
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// MAIN LOGIC
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void FixedUpdate()
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{
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//DEATH
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if (CurrentBatteryCapacity == 0)
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{
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Health = 0;
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}
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if (Health <= 0)
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{
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GameObject DeadBody;
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DeadBody = Instantiate(gameObject, transform.position, Quaternion.identity);
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DeadBody.GetComponent<Rigidbody2D>().gravityScale = 3;
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Destroy(GameObject.Find(DeadBody.name).GetComponent<TestEnemyAIDroneRanged>());
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Destroy(GameObject.Find(DeadBody.name).GetComponent<Seeker>());
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foreach (Transform child in DeadBody.transform)
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{
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GameObject.Destroy(child.gameObject);
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}
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Destroy(gameObject);
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}
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//Battery
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// Low battery return
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if (CurrentBatteryCapacity <= MaxBatteryCapacity / 10)
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{
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ReturnToDroneBay();
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}
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// Recharge battery & bay detection
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if (Vector2.Distance(transform.position, DroneBayLocation.position) <= 0.5)
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{
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currentlyInDroneBay = true;
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currentlyTravelingToDroneBay = false;
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if (currentlyRecharging == false && CurrentBatteryCapacity < MaxBatteryCapacity / 10)
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{
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Recharge();
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}
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else
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{
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canMove = false;
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}
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}
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else
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{
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//canMove = true;
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currentlyInDroneBay = false;
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}
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// See where the enemy wants to go (DEBUGGING ONLY)
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/*
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if (target != null)
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{
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foreach (GameObject pos in AllPositions)
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{
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pos.GetComponent<SpriteRenderer>().enabled = false;
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}
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target.GetComponent<SpriteRenderer>().enabled = true;
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}
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*/
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//CHANGE ICONS
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if (targetingPlayer)
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{
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transform.Find("PursuingIndicator").GetComponent<SpriteRenderer>().enabled = true;
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}
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else
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{
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transform.Find("PursuingIndicator").GetComponent<SpriteRenderer>().enabled = false;
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}
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if (currentlyReloading)
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{
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transform.Find("ReloadingIndicator").GetComponent<SpriteRenderer>().enabled = true;
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}
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else
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{
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transform.Find("ReloadingIndicator").GetComponent<SpriteRenderer>().enabled = false;
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}
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if (CurrentBatteryCapacity <= MaxBatteryCapacity / 10)
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{
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transform.Find("BatteryIndicator").GetComponent<SpriteRenderer>().enabled = true;
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}
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else
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{
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transform.Find("BatteryIndicator").GetComponent<SpriteRenderer>().enabled = false;
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}
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if (currentlyInDroneBay == false)
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{
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seeker.enabled = true;
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}
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//MISC PATHFINDING
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if (path == null)
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return;
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if (target == null)
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return;
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if (currentWaypoint >= path.vectorPath.Count)
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{
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reachedEndOfPath = true;
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return;
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}
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else
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{
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reachedEndOfPath = false;
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}
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//RANGED ATTACK
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// Check if enemy has line of sight on the player & if they are in the acceptable range
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if (WeaponCurrentMagazineAmmount > 0 && canFire == true && currentlyReloading == false && currentlyInDroneBay == false)
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{
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if (DetermineLineOfSight(gameObject, player) == true && inFiringCycle == false && Vector2.Distance(transform.position, player.transform.position) <= WeaponRange && Vector2.Distance(transform.position, player.transform.position) <= DesiredDistance)
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{
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UseWeapon();
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}
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}
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else if (WeaponCurrentMagazineAmmount == 0 && currentlyReloading == false)
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{
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ReloadWeapon();
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}
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//MOVEMENT
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if (canMove == true)
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{
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Vector2 direction = ((Vector2)path.vectorPath[currentWaypoint] - rb.position).normalized;
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Vector2 force = direction * Speed * 20;
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rb.AddForce(force);
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// A* logic
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float distance = Vector2.Distance(rb.position, path.vectorPath[currentWaypoint]);
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if (distance < nextWaypointDistance)
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{
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currentWaypoint++;
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}
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}
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//DETECTION
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// Enemy detects player
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if (DetermineLineOfSight(transform.parent.gameObject, player) && Vector2.Distance(DroneBayLocation.position, player.transform.position) <= PlayerDetectionRange && currentlyRecharging == false)
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{
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if (currentlyInDroneBay == true)
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{
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rb.linearVelocity = transform.parent.transform.up * 10;
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}
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canMove = true;
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targetingPlayer = true;
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canPursue = true;
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// Angle barrel towards player
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angle = Mathf.Atan2(player.transform.position.y - barrel.transform.position.y, player.transform.position.x - barrel.transform.position.x) * Mathf.Rad2Deg;
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}
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else if (DetermineLineOfSight(gameObject, player) == true && Vector2.Distance(transform.position, player.transform.position) <= PlayerDetectionRange)
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{
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targetingPlayer = true;
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canPursue = true;
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// Get the last know player location by finding which of the positions is closest to the player
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if (LastKnownPlayerLocation == null)
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{
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LastKnownPlayerLocation = gameObject;
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}
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foreach (GameObject pos in AllPositions)
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{
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if (Vector2.Distance(player.transform.position, pos.transform.position) < Vector2.Distance(player.transform.position, LastKnownPlayerLocation.transform.position))
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{
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LastKnownPlayerLocation = pos;
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}
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}
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// Reset barrel rotation
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angle = -90f;
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}
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// Player has broken line of sight and the enemy will attempt to move to the last known location
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else if (LastKnownPlayerLocation != null)
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{
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if (Vector2.Distance(transform.position, LastKnownPlayerLocation.transform.position) > 0.5)
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{
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canPursue = false;
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target.transform.position = LastKnownPlayerLocation.transform.position;
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}
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if (Vector2.Distance(transform.position, LastKnownPlayerLocation.transform.position) < 0.5 && DetermineLineOfSight(player, gameObject) == false)
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{
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targetingPlayer = false;
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LastKnownPlayerLocation = null;
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}
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// Reset barrel rotation
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angle = -90f;
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}
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// Go back to drone bay
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else
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{
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LastKnownPlayerLocation = null;
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ReturnToDroneBay();
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targetingPlayer = false;
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// Reset barrel rotation
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angle = -90f;
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}
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// Rotate barrel towards player
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Quaternion targetRotation = Quaternion.Euler(new Vector3(0, 0, angle));
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barrel.transform.rotation = Quaternion.RotateTowards(barrel.transform.rotation, targetRotation, 100 * Time.deltaTime);
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if (currentlyTravelingToDroneBay == false)
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{
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//TARGET DETERMINATION
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// If enemy is at the target position
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if (Vector2.Distance(target.transform.position, transform.position) < 1.5)
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{
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ComputeClosestPositionToPlayer();
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}
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// If the player moves away (CHANGE TARGET)
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if (Vector2.Distance(target.transform.position, player.transform.position) > DesiredDistance)
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{
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ComputeClosestPositionToPlayer();
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}
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//If the player is too close to the target (CHANGE TARGET)
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if (Vector2.Distance(target.transform.position, player.transform.position) < MinumumDistance)
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{
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ComputeClosestPositionToPlayer();
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}
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// If the player is not within line of sight of the desired position (CHANGE TARGET)
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if (DetermineLineOfSight(target, player) == false)
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{
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ComputeClosestPositionToPlayer();
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}
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// If the enemy reaches the target
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if (Vector2.Distance(target.transform.position, transform.position) <= 1)
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{
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if (DetermineLineOfSight(gameObject, player) == false) // If the enemy has LOS on the player
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{
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ComputeClosestPositionToPlayer();
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}
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}
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}
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}
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//MISC METHODS
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// Use Ranged Weapon
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async Task UseWeapon() // Weapon for projectile based enemy
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{
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inFiringCycle = true;
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// Create Projectile
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GameObject BulletInstance;
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BulletInstance = Instantiate(projectile, transform.position, Quaternion.LookRotation(transform.position - GameObject.FindGameObjectWithTag("Player").transform.position + new Vector3(UnityEngine.Random.Range((-1 * WeaponRandomSpread), WeaponRandomSpread), UnityEngine.Random.Range((-1 * WeaponRandomSpread), WeaponRandomSpread), 0)));
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BulletInstance.transform.parent = transform;
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// Send it on it's way
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BulletInstance.GetComponent<Rigidbody2D>().linearVelocity = BulletInstance.transform.forward * -1 * WeaponProjectileSpeed;
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BulletInstance.transform.rotation = Quaternion.Euler(new Vector3(0, 0, Vector2.SignedAngle(Vector2.right, BulletInstance.transform.forward) - 90));
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WeaponCurrentMagazineAmmount--;
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await Task.Delay(WeaponFireRate);
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inFiringCycle = false;
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}
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// Reload Weapon
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async Task ReloadWeapon()
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{
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canFire = false;
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//play reload animation
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currentlyReloading = true;
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await Task.Delay(WeaponReloadTime);
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WeaponCurrentMagazineAmmount = WeaponMagazineSize;
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currentlyReloading = false;
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NumberOfHitsPerMag = 0;
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canFire = true;
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}
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// Return To Drone Bay
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async Task ReturnToDroneBay()
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{
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if (currentlyTravelingToDroneBay == false && currentlyInDroneBay == false)
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{
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currentlyTravelingToDroneBay = true;
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target.transform.position = DroneBayLocation.position;
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}
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}
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// Recharge
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async Task Recharge()
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{
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currentlyRecharging = true;
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canMove = false;
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canFire = false;
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seeker.enabled = false;
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transform.position = DroneBayLocation.position;
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rb.linearVelocity = Vector3.zero;
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currentlyTravelingToDroneBay = false;
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await Task.Delay(RechargeTime);
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CurrentBatteryCapacity = MaxBatteryCapacity;
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currentlyRecharging = false;
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canFire = true;
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}
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// General Utility
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bool DetermineLineOfSight(GameObject object1, GameObject object2)
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{
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Vector3 RaycastStart = object1.transform.position;
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Vector3 RaycastDirection = (object2.transform.position - object1.transform.position).normalized;
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float RaycastDistance = Vector3.Distance(object2.transform.position, object1.transform.position);
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if (Physics2D.Raycast(RaycastStart, RaycastDirection, RaycastDistance, LayerMask.GetMask("SolidGround")) == false)
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{
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Debug.DrawRay(RaycastStart, RaycastDirection * RaycastDistance);
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return true;
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}
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else
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{
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return false;
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}
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}
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// Part of the pursue cycle
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void ComputeClosestPositionToPlayer()
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{
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// find a target in the air a set radius away from the player
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if (DetermineLineOfSight(player, gameObject))
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{
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canMove = true;
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target.transform.position = new Vector2((player.transform.position.x + UnityEngine.Random.Range(-MinumumDistance, MinumumDistance)), (player.transform.position.y + MinumumDistance + UnityEngine.Random.Range(-5, 0)));
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}
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}
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} |