public void Split(Region r, int fraction = 2)
{
var target = this.tiles.Count() / (float)fraction;
var i = 0;
var original_fragments = MapGen.SeperateContiguous(this.tiles).Count();
var open = new TileSelection();
var start = tiles.Sample();
open.Add(start);
while (r.tiles.Count() < target && open.Count() > 0)
{
i++;
var t = open.Sample();
open.Remove(t);
r.Assign(t);
if (i % 10 == 1)
{
JoinCutOffAreas(r, original_fragments);
}
foreach (var n in t.adjacent.tiles)
{
if (n.region == this)
{
if (n.land)
{
open.Add(n);
}
}
}
}
this.JoinCutOffAreas(r, original_fragments);
var core = r.tiles;
//core = MapGen.Shrink(core);
var original_core = this.tiles;
//original_core = MapGen.Shrink(original_core);
var to_switch_back = new TileSelection();
foreach (var t in r.tiles.tiles)
{
if (core.DoesNotContain(t))
{
to_switch_back.Add(t);
}
}
foreach (var t in this.tiles.tiles)
{
if (original_core.DoesNotContain(t))
{
to_switch_back.Add(t);
}
}
Dictionary <Tile, Region> switchMap = new Dictionary <Tile, Region>();
var allowed_regions = new HashSet <Region>();
allowed_regions.Add(r);
allowed_regions.Add(this);
foreach (var t in to_switch_back.tiles)
{
t.region = null;
r.tiles.Remove(t);
TileSelection t_as_list = new TileSelection();
t_as_list.Add(t);
try{
switchMap.Add(t, MapGen.ClosestRegion(t_as_list, null, allowed_regions));
}catch (Exception e) {
Debug.LogError(e); // Swallow
}
}
foreach (KeyValuePair <Tile, Region> entry in switchMap)
{
entry.Value.Assign(entry.Key);
}
r.JoinCutOffAreas(this, 1);
this.JoinCutOffAreas(r, original_fragments);
}
