IEnumerator RemoveHexagons(IAdminEntity[] entities)
{
Clipper clipper = new Clipper();
Cell[] cells = _map.cells;
for (int j = 0; j < cells.Length; j++)
{
if (j % 100 == 0)
{
if (hexifyContext.progress != null)
{
if (hexifyContext.progress((float)j / cells.Length, hexifyContext.title, "Pass 5/6: removing cells from neighbours..."))
{
cancelled = true;
hexifyContext.finish(true);
yield break;
}
}
yield return(null);
}
int entityIndex = procCells [j].entityIndex;
if (entityIndex < 0)
{
continue;
}
RegionCell regionCell = procCells [j];
IAdminEntity entity = entities [entityIndex];
// Substract cell region from any other entity
List <Region> otherRegions;
if (entity is Country)
{
otherRegions = _map.GetCountryRegionsOverlap(regionCell.cellRegion);
}
else
{
otherRegions = _map.GetProvinceRegionsOverlap(regionCell.cellRegion);
}
int orCount = otherRegions.Count;
for (int o = 0; o < orCount; o++)
{
Region otherRegion = otherRegions [o];
IAdminEntity otherEntity = otherRegion.entity;
if (otherEntity == entity)
{
continue;
}
clipper.Clear();
clipper.AddPath(otherRegion, PolyType.ptSubject);
clipper.AddPath(regionCell.cellRegion, PolyType.ptClip);
clipper.Execute(ClipType.ctDifference, otherEntity);
}
}
}
/// <summary>
/// Adjusts all countries frontiers to match the hexagonal grid
/// </summary>
public IEnumerator HexifyCountries(HexifyOpContext context)
{
Cell[] cells = _map.cells;
if (cells == null)
{
yield break;
}
// Initialization
cancelled = false;
hexifyContext = context;
if (procCells == null || procCells.Length < cells.Length)
{
procCells = new RegionCell[cells.Length];
}
for (int k = 0; k < cells.Length; k++)
{
procCells [k].entityIndex = -1;
}
// Compute area of a single cell; for optimization purposes we'll ignore all regions whose surface is smaller than a 20% the size of a cell
float minArea = 0;
Region templateCellRegion = null;
for (int k = 0; k < cells.Length; k++)
{
if (cells [k] != null)
{
templateCellRegion = new Region(null, 0);
templateCellRegion.UpdatePointsAndRect(cells [k].points, true);
minArea = templateCellRegion.rect2DArea * 0.2f;
break;
}
}
if (templateCellRegion == null)
{
yield break;
}
if (hexagonPoints == null || hexagonPoints.Length != 6)
{
hexagonPoints = new Vector2[6];
}
for (int k = 0; k < 6; k++)
{
hexagonPoints [k] = templateCellRegion.points [k] - templateCellRegion.center;
}
// Pass 1: remove minor regions
yield return(RemoveSmallRegions(minArea, _map.countries));
// Pass 2: assign all region centers to each country from biggest country to smallest country
if (!cancelled)
{
yield return(AssignRegionCenters(_map.countries));
}
// Pass 3: add cells to target countries
if (!cancelled)
{
yield return(AddHexagons(_map.countries));
}
// Pass 4: merge adjacent regions
if (!cancelled)
{
yield return
(MergeAdjacentRegions(_map.countries));
}
// Pass 5: remove cells from other countries
if (!cancelled)
{
yield return(RemoveHexagons(_map.countries));
}
// Pass 6: update geometry of resulting countries
if (!cancelled)
{
yield return(UpdateCountries());
}
if (!cancelled)
{
_map.OptimizeFrontiers();
_map.Redraw(true);
}
hexifyContext.progress(1f, hexifyContext.title, ""); // hide progress bar
yield return(null);
if (hexifyContext.finish != null)
{
hexifyContext.finish(cancelled);
}
}