// get a random point on a circle with given radius
private float3 RandomPointOnCircle(float radius)
{
Vector2 randomPoint = Random.insideUnitCircle.normalized * radius;
// return random point on circle, centered around the player position
return(new float3(randomPoint.x, 0.5f, randomPoint.y) + (float3)GameManagerNonECS.GetPlayerPosition());
}
// turn to face the player's position
private void FacePlayer()
{
Vector3 playerPosition = GameManagerNonECS.GetPlayerPosition();
Vector3 direction = playerPosition - transform.position;
direction.y = 0f;
transform.rotation = Quaternion.LookRotation(direction, Vector3.up);
}
void Update()
{
// move forward
MoveForward();
// if game is playing, turn to crash into the player
if (!GameManagerNonECS.IsGameOver())
{
FacePlayer();
CheckPlayerCollision();
CheckBulletCollisions();
}
}
// loop through all the bullets and check proximity
private void CheckBulletCollisions()
{
GameObject[] allBullets = GameObject.FindGameObjectsWithTag("Bullet");
foreach (GameObject bullet in allBullets)
{
if (Vector3.Distance(bullet.transform.position, transform.position) < collisionDistance)
{
Destroy(gameObject);
Destroy(bullet.gameObject);
FXManager.Instance.CreateExplosion(transform.position);
GameManagerNonECS.AddScore(1);
}
}
}
// simple Singleton
void Awake()
{
if (Instance != null && Instance != this)
{
Destroy(gameObject);
}
else
{
Instance = this;
}
player = FindObjectOfType <PlayerManager>().transform;
enemySpawner = FindObjectOfType <EnemySpawnerNonECS>();
gameState = GameState.Ready;
}
// check proximity to player
private void CheckPlayerCollision()
{
Vector3 playerPosition = GameManagerNonECS.GetPlayerPosition();
playerPosition.y = transform.position.y;
if (Vector3.Distance(playerPosition, transform.position) < collisionDistance)
{
Destroy(gameObject);
FXManager.Instance.CreateExplosion(transform.position);
// player is invincible by default in this non-ECS version of the demo
if (canHitPlayer)
{
FXManager.Instance.CreateExplosion(playerPosition);
GameManagerNonECS.EndGame();
}
}
}
private void Update()
{
// disable if the game has just started or if player is dead
if (!canSpawn || GameManagerNonECS.IsGameOver())
{
return;
}
// count up until next spawn
spawnTimer += Time.deltaTime;
// spawn and reset timer
if (spawnTimer > spawnInterval)
{
SpawnWave();
spawnTimer = 0;
}
}
