This is a spawn script that I have been working on for a while but I figured that this will be good enough for release to the public to use as they see fit.
It’s used for spawning enemy and is fully commented.
// AUTHOR:Garth de Wet (Corrupted Heart)
// CONTACT:mydeathofme[at]gmail[dot]com
// FILENAME:Spawner.cs
// PURPOSE:To allow spawning of different enemy types and different ways to spawn them.
using UnityEngine;
using System.Collections;
public class Spawner : MonoBehaviour
{
//----------------------------------
// All the Enums
//----------------------------------
// Spawn types
public enum SpawnTypes
{
Normal,
Once,
Wave,
TimedWave
}
// The different Enemy levels
public enum EnemyLevels
{
Easy,
Medium,
Hard,
Boss
}
//---------------------------------
// End of the Enums
//---------------------------------
// Enemy level to be spawnedEnemy
public EnemyLevels enemyLevel = EnemyLevels.Easy;
//----------------------------------
// Enemy Prefabs
//----------------------------------
public GameObject EasyEnemy;
public GameObject MediumEnemy;
public GameObject HardEnemy;
public GameObject BossEnemy;
//----------------------------------
// End of Enemy Prefabs
//----------------------------------
//----------------------------------
// Enemies and how many have been created and how many are to be created
//----------------------------------
public int totalEnemy = 10;
private int numEnemy = 0;
private int spawnedEnemy = 0;
//----------------------------------
// End of Enemy Settings
//----------------------------------
// The ID of the spawner
private int SpawnID;
//----------------------------------
// Different Spawn states and ways of doing them
//----------------------------------
private bool waveSpawn = false;
public bool Spawn = true;
public SpawnTypes spawnType = SpawnTypes.Normal;
// timed wave controls
public float waveTimer = 30.0f;
private float timeTillWave = 0.0f;
//Wave controls
public int totalWaves = 5;
private int numWaves = 0;
//----------------------------------
// End of Different Spawn states and ways of doing them
//----------------------------------
void Start()
{
// sets a random number for the id of the spawner
SpawnID = Random.Range(1, 500);
}
// Draws a cube to show where the spawn point is... Useful if you don't have a object that show the spawn point
void OnDrawGizmos()
{
// Sets the color to red
Gizmos.color = Color.red;
//draws a small cube at the location of the gam object that the script is attached to
Gizmos.DrawCube(transform.position, new Vector3 (0.5f,0.5f,0.5f));
}
void Update ()
{
if(Spawn)
{
// Spawns enemies everytime one dies
if (spawnType == SpawnTypes.Normal)
{
// checks to see if the number of spawned enemies is less than the max num of enemies
if(numEnemy < totalEnemy)
{
// spawns an enemy
spawnEnemy();
}
}
// Spawns enemies only once
else if (spawnType == SpawnTypes.Once)
{
// checks to see if the overall spawned num of enemies is more or equal to the total to be spawned
if(spawnedEnemy >= totalEnemy)
{
//sets the spawner to false
Spawn = false;
}
else
{
// spawns an enemy
spawnEnemy();
}
}
//spawns enemies in waves, so once all are dead, spawns more
else if (spawnType == SpawnTypes.Wave)
{
if(numWaves < totalWaves + 1)
{
if (waveSpawn)
{
//spawns an enemy
spawnEnemy();
}
if (numEnemy == 0)
{
// enables the wave spawner
waveSpawn = true;
//increase the number of waves
numWaves++;
}
if(numEnemy == totalEnemy)
{
// disables the wave spawner
waveSpawn = false;
}
}
}
// Spawns enemies in waves but based on time.
else if(spawnType == SpawnTypes.TimedWave)
{
// checks if the number of waves is bigger than the total waves
if(numWaves <= totalWaves)
{
// Increases the timer to allow the timed waves to work
timeTillWave += Time.deltaTime;
if (waveSpawn)
{
//spawns an enemy
spawnEnemy();
}
// checks if the time is equal to the time required for a new wave
if (timeTillWave >= waveTimer)
{
// enables the wave spawner
waveSpawn = true;
// sets the time back to zero
timeTillWave = 0.0f;
// increases the number of waves
numWaves++;
// A hack to get it to spawn the same number of enemies regardless of how many have been killed
numEnemy = 0;
}
if(numEnemy >= totalEnemy)
{
// diables the wave spawner
waveSpawn = false;
}
}
else
{
Spawn = false;
}
}
}
}
// spawns an enemy based on the enemy level that you selected
private void spawnEnemy()
{
// To check which enemy prefab to instantiate
if (enemyLevel == EnemyLevels.Easy)
{
// Checks to see if there is a gameobject in the easy enemy var
if (EasyEnemy != null)
{
// spawns the enemy
GameObject Enemy = (GameObject) Instantiate(EasyEnemy, gameObject.transform.position, Quaternion.identity);
// calls a function on the enemy that applies the spawner's ID to the enemy
Enemy.SendMessage("setName", SpawnID);
}
else
{
//Shows a debug message if there is no prefab
Debug.Log("ERROR: No easy enemy Prefab loaded");
}
}
else if (enemyLevel == EnemyLevels.Medium)
{
// Checks to see if there is a gameobject in the medium enemy var
if (MediumEnemy != null)
{
// spawns the enemy
GameObject Enemy = (GameObject) Instantiate(MediumEnemy, gameObject.transform.position, Quaternion.identity);
// calls a function on the enemy that applies the spawner's ID to the enemy
Enemy.SendMessage("setName", SpawnID);
}
else
{
//Shows a debug message if there is no prefab
Debug.Log("ERROR: No medium enemy Prefab loaded");
}
}
else if (enemyLevel == EnemyLevels.Hard)
{
// Checks to see if there is a gameobject in the hard enemy var
if (HardEnemy != null)
{
// spawns the enemy
GameObject Enemy = (GameObject) Instantiate(HardEnemy, gameObject.transform.position, Quaternion.identity);
// calls a function on the enemy that applies the spawner's ID to the enemy
Enemy.SendMessage("setName", SpawnID);
}
else
{
//Shows a debug message if there is no prefab
Debug.Log("ERROR: No hard enemy Prefab loaded");
}
}
else if (enemyLevel == EnemyLevels.Boss)
{
// Checks to see if there is a gameobject in the boss enemy var
if (BossEnemy != null)
{
// spawns the enemy
GameObject Enemy = (GameObject) Instantiate(BossEnemy, gameObject.transform.position, Quaternion.identity);
// calls a function on the enemy that applies the spawner's ID to the enemy
Enemy.SendMessage("setName", SpawnID);
}
else
{
//Shows a debug message if there is no prefab
Debug.Log("ERROR: No boss enemy Prefab loaded");
}
}
// Increase the total number of enemies spawned and the number of spawned enemies
numEnemy++;
spawnedEnemy++;
}
// Call this function from the enemy when it "dies" to remove an enemy count
public void killEnemy(int sID)
{
// if the enemy's spawnId is equal to this spawnersID then remove an enemy count
if (SpawnID == sID)
{
numEnemy--;
}
}
//enable the spawner based on spawnerID
public void enableSpawner(int sID)
{
if (SpawnID == sID)
{
Spawn = true;
}
}
//disable the spawner based on spawnerID
public void disableSpawner(int sID)
{
if(SpawnID == sID)
{
Spawn = false;
}
}
// returns the Time Till the Next Wave, for a interface, ect.
public float TimeTillWave
{
get
{
return timeTillWave;
}
}
// Enable the spawner, useful for trigger events because you don't know the spawner's ID.
public void enableTrigger()
{
Spawn = true;
}
}
For the latest version and tips on how to use it you can go to http://www.corruptedheart.co.cc/p/spawner-script.html
EDIT: Updated code to the latest and added URL
EDIT 2010/06/06: Updated code to the latest.
EDIT 2010/06/07: Updated code to the latest.
