public static SpawnArea Instantiate(Region region, TileFlag filter, SpawnValidator validator, bool cache)
{
string name = region.Name;
if (region.IsDefault || string.IsNullOrWhiteSpace(name))
{
name = "Default";
}
TileFlag[] filters = GetFilters(filter);
int hash = GetHashCode(region.Map, name, filters, validator);
if (!_Cache.TryGetValue(hash, out SpawnArea o) || o == null)
{
o = new SpawnArea(region.Map, name, filters, validator);
if (cache)
{
_Cache[hash] = o;
}
o.Invalidate();
}
return(o);
}
private SpawnArea(Map facet, string region, TileFlag[] filters, SpawnValidator validator)
{
_Points = new HashSet <Point3D>();
Facet = facet;
Region = region;
Filters = filters;
Validator = validator;
}
private static int GetHashCode(Map facet, string region, IEnumerable <TileFlag> filters, SpawnValidator validator)
{
unchecked
{
int hash = region.Length;
for (var index = 0; index < region.Length; index++)
{
var c = region[index];
hash = unchecked ((hash * 397) ^ Convert.ToInt32(c));
}
hash = (hash * 397) ^ facet.MapID;
hash = (hash * 397) ^ facet.MapIndex;
TileFlag filter = TileFlag.None;
foreach (TileFlag f in filters)
{
filter |= f;
}
if (filter != TileFlag.None)
{
hash = (hash * 397) ^ (int)(((long)filter >> 0) & 0x7FFFFFFF);
hash = (hash * 397) ^ (int)(((long)filter >> 32) & 0x7FFFFFFF);
}
if (validator != null)
{
hash = (hash * 397) ^ validator.GetHashCode();
}
return(hash);
}
}
private static int GetHashCode(Map facet, string region, IEnumerable <TileFlag> filters, SpawnValidator validator)
{
unchecked
{
var hash = region.Length;
hash = region.Aggregate(hash, (v, c) => unchecked ((v * 397) ^ Convert.ToInt32(c)));
hash = (hash * 397) ^ facet.MapID;
hash = (hash * 397) ^ facet.MapIndex;
var filter = TileFlag.None;
foreach (var f in filters)
{
filter |= f;
}
if (filter != TileFlag.None)
{
hash = (hash * 397) ^ (int)(((long)filter >> 0) & 0x7FFFFFFF);
hash = (hash * 397) ^ (int)(((long)filter >> 32) & 0x7FFFFFFF);
}
if (validator != null)
{
hash = (hash * 397) ^ validator.GetHashCode();
}
return(hash);
}
}
