// Creates the Spawn Zone and populates its traversable zone tile list
// by checking all the tiles within its radius
SpawnZone CreateSpawnZone(Pos candidate, float spawnZoneRadius)
{
SpawnZone spawnZone = new SpawnZone(candidate, spawnZoneRadius, mapManager.GetTileRegion(candidate));
List <Pos> zoneTiles = new List <Pos>();
int cellX = candidate.x;
int cellY = candidate.y;
int numOfCellsToScan = Mathf.CeilToInt(spawnZoneRadius);
int searchStartX = Mathf.Max(0, cellX - numOfCellsToScan);
int searchEndX = Mathf.Min(cellX + numOfCellsToScan, width - 1);
int searchStartY = Mathf.Max(0, cellY - numOfCellsToScan);
int searchEndY = Mathf.Min(cellY + numOfCellsToScan, height - 1);
for (int x = searchStartX; x <= searchEndX; x++)
{
for (int y = searchStartY; y <= searchEndY; y++)
{
Pos tile = new Pos(x, y);
if (mapManager.IsTraversable(tile) && !mapManager.IsOccupied(tile))
{
int a = cellX - x;
int b = cellY - y;
if (Mathf.Sqrt(a * a + b * b) <= spawnZoneRadius)
{
zoneTiles.Add(tile);
}
}
}
}
spawnZone.SetZoneTiles(zoneTiles);
return(spawnZone);
}