Randomly Spawn Outside The Camera Field of View

Questions & Answers
1

I’ve been at this for a while now and can’t seem to find a solution to my problem. I am trying to get the enemy to randomly spawn outside of the camera field of view. The problem I am having is that when ever I play the game, the enemy’s always spawn in the corner of the screen. (I’m just using blocks because of testing)

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Here is my scripts:

public GameObject[] enemy;
public int amount;
private Vector3 spawnPoint;

private float camMin;
private float camMax;

void Start()
{
	camMin = Camera.main.orthographicSize;
	camMax = Camera.main.orthographicSize + 2;
}

void Update ()
{
	enemy = GameObject.FindGameObjectsWithTag ("Enemy");
	amount = enemy.Length;

	if (amount != 10) 
	{
		InvokeRepeating ("spawnEnemy", 1f, 2f);
	}
}

void spawnEnemy()
{
	spawnPoint.x = Random.Range (camMin,camMax);
	spawnPoint.y = Random.Range (camMin,camMax);
	spawnPoint.z = 0;

	Instantiate (enemy [UnityEngine.Random.Range (0, enemy.Length - 1)],spawnPoint, Quaternion.identity);
	CancelInvoke ();
}

Thanks for the help!

2

Camera.OrthographicSize returns half the vertical size of the orthographic viewing volume. So, essentially, any point in the outer 50% of the viewable area, or less (horizontally) if you’re in widescreen. Try adding to this value (for both camMin and camMax), or perhaps switch to using pixelHeight and pixelWidth and see if you get better results.