public void SpawnBall()
{
if (arenaManager == null)
{
arenaManager = FindObjectOfType <ArenaManager>();
}
Vector3 spawnPiecePosition = ArenaUtilities
.GetRandomArenaGridPieceWithinWalls(arenaManager.ArenaGridPiecesCache)
.transform.position;
Vector3 ballSpawnPosition = new Vector3(spawnPiecePosition.x,
spawnPiecePosition.y + BallSpawnHeight,
spawnPiecePosition.z);
Instantiate(Ball, ballSpawnPosition, Ball.transform.rotation);
arenaManager.InitComplete();
}