AIController.checkForPlayer C# (CSharp) Method

	protected bool checkForPlayer ()
	{
		if( getPlayer() == null )
			return false;
		Vector3 playerPos = getPlayer ().transform.position;

		// check if NPC can see that far
		if (Vector3.Distance (transform.position, playerPos) <= visionDistance) 
		{
			// get direction of player from NPC's point of view
			Vector3 direction = playerPos - transform.position;

			// get angle of direction 
			float angle = Vector3.Angle (direction, npcDir);

			if (angle <= visionAngleOffset)
				return true;
		}
		return false;
	}