} // end of fixed update method
//this is called whenever the enemy hits something
void OnCollisionEnter2D(Collision2D other)
{
//Check to see that what we hit was the player's bullet
if (other.gameObject.tag == "PlayerBullet")
{
//Since it got shot, we might drop a power up
//first, get a number based on the drop chance and the random number generator
//get a number between 0 and 100
int dropRoll = Random.Range(0, 100);
//compare the roll with dropChance, if the roll is lower than chance it was successful
if (dropRoll <= dropChance)
{
//drop the power up right there
Instantiate(powerUpPreFab, transform.position, Quaternion.identity);
}
//give the player 100 points for killing the enemy
GameControl.Add_Score(100);
//create the explosion prefab at the location of the enemy
Instantiate(explosion, transform.position, Quaternion.identity);
//send information to the debug, this is just for testing purposes
Debug.Log("Enemy hit by " + other.gameObject.name);
//Take the enemy out of the count of enemies
GameControl.Add_Enemy(-1);
//destroy both the bullet and the enemy
Destroy(other.gameObject);
Destroy(gameObject);
}
//if we run into the player
if (other.gameObject.tag == "Player")
{
//create an explosion at the collision center
Instantiate(explosion, transform.position, Quaternion.identity);
//killing an enemy by running into is worth half points
GameControl.Add_Score(50);
//Take the enemy out of the count of enemies
GameControl.Add_Enemy(-1);
//destroy the enemy - add code to hurt the player later
Destroy(gameObject);
}
//if the enemy makes it to the bottom of the screen
if (other.gameObject.tag == "Border")
{
//Take the enemy out of the count of enemies
GameControl.Add_Enemy(-1);
//just disappear
Destroy(gameObject);
}
}
// Update is called once per frame
void Update()
{
//throw this in so that if the game is paused, we don't spawn enemies
if (Time.timeScale == 0)
{
//return command ends the current method and ignores everything under it
return;
}
//count down the counter by one each frame
count--;
//count down is over, lets spawn an enemy
if (count <= 0)
{
//Make sure we don't have too many enemies already
// the != means does not equal
if (enemyCount != enemyLimit)
{
//change the position based on which enemy it is, to give some variety
//at this point, I don't vary the position at all
//float variance = Random.Range(0f, 0.3f);
Vector2 enemyPos = new Vector2(transform.position.x, transform.position.y);
//Instantiate the enemy type
Instantiate(enemyType, enemyPos, Quaternion.identity);
//Tell the GameControl we made another enemy
GameControl.Add_Enemy(1);
//update the count of enemies
enemyCount++;
//reset the counter
count = delayCount;
}
}
}