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using System.Collections;
using System;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
public class WaveSpawner : MonoBehaviour {
[Header("Attributes")]
public float TimeBetweenWaves;
public float SpawnRate;
[Header("Objects")]
public Transform SpawnPoint;
public Transform PathWay;
public Text WaveCountdownText;
[Header("Every possible enemy")]
public EnemyType[] Enemies;
[Header("Scripting vars")]
public Player Player; // Reference to the player object, should be set in designer
private Transform _parentObject;
private List<Vector3> _waypoints = new List<Vector3>();
public static int EnemiesAlive = 0;
private float _countdown = 2f;
private int _waveIndex = 0;
void Awake() {
foreach (Transform child in PathWay) {
_waypoints.Add (child.position);
}
}
void Start() {
_parentObject = transform.Find ("enemies").gameObject.GetComponent <Transform> ();
}
void Update () {
if (EnemiesAlive > 0) {
return;
}
if (_countdown <= 0f) {
StartCoroutine(SpawnWave());
_countdown = TimeBetweenWaves;
return;
}
_countdown -= Time.deltaTime;
_countdown = Mathf.Clamp(_countdown, 0f, Mathf.Infinity);
//waveCountdownText.text = string.Format("{0:00.00}", countdown);
}
private int WaveEnemyCount(int waveNum) {
// 10.64 * e^0,57x
float pow = (float) Math.Pow( Math.E, 0.57f * waveNum);
return (int) Math.Floor(10.64f * pow);
}
private float EnemyAmountThing(int currentEnemy, int maxTypes) {
// TODO Change the for loop into a faster method
float rest = 1;
for (int i=1; i <= maxTypes; i++) {
if (i != maxTypes) { rest = rest / 2; }
if (i == currentEnemy + 1) { return rest; }
}
return 0;
}
IEnumerator SpawnWave () {
int enemiesToSpawn = WaveEnemyCount(_waveIndex);
EnemiesAlive = enemiesToSpawn;
List<WaveElement> wave = new List<WaveElement>();
for (int i = 0; i < Enemies.Length; i++) {
EnemyType enemy = Enemies[i];
float amount = enemiesToSpawn * EnemyAmountThing(i, Enemies.Length);
if (amount >= 1) {
wave.Add(new WaveElement {Prefab = enemy.Enemy, Amount = (int)Math.Floor(amount)} );
}
}
foreach (var enemyType in wave) {
for (int i = 0; i < enemyType.Amount; i++) {
SpawnEnemy(enemyType.Prefab);
yield return new WaitForSeconds(1f / SpawnRate);
}
yield return new WaitForSeconds(1f / 100f);
}
SpawnRate = SpawnRate * 2;
_waveIndex++;
}
void SpawnEnemy (GameObject enemyPrefab) {
GameObject newEnemy = Instantiate (enemyPrefab, new Vector3(0, 0, 0), Quaternion.identity, _parentObject);
Enemy script = newEnemy.GetComponent <Enemy> ();
Transform transform = newEnemy.GetComponent <Transform>();
script.Waypoints = _waypoints;
script.Player = Player;
transform.position = new Vector3 (0.93f, 0.483f, 0f);
}
[System.Serializable]
public class EnemyType {
public string Name;
public GameObject Enemy;
[Range(0, 1)]
public float Percentage;
}
public class WaveElement {
public GameObject Prefab { get; set; }
public int Amount { get; set; }
}
}
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