private IntVec3 FindRandomEdgeCellForTunnel(List <IntVec3> group, Map map)
{
MapGenFloatGrid caves = MapGenerator.Caves;
IntVec3[] cardinalDirections = GenAdj.CardinalDirections;
tmpCells.Clear();
tmpGroupSet.Clear();
tmpGroupSet.AddRange(group);
for (int i = 0; i < group.Count; i++)
{
if (group[i].DistanceToEdge(map) < 3 || caves[group[i]] > 0f)
{
continue;
}
for (int j = 0; j < 4; j++)
{
IntVec3 item = group[i] + cardinalDirections[j];
if (!tmpGroupSet.Contains(item))
{
tmpCells.Add(group[i]);
break;
}
}
}
if (!tmpCells.Any())
{
ZLogger.Warning("Could not find any valid edge cell.");
return(group.RandomElement());
}
return(tmpCells.RandomElement());
}