private scg.Dictionary <Vector, scg.List <PointF> > GetRegions(VoronoiGraph graph)
{
scg.Dictionary <Vector, scg.List <PointF> > output = new scg.Dictionary <Vector, scg.List <PointF> >();
int i = 0;
foreach (Vector v in this.points)
{
if (!output.ContainsKey(v))
{
output.Add(v, new scg.List <PointF>());
foreach (VoronoiEdge edge in graph.Edges)
{
AddEdgeForVectorRegion(output, edge, v);
}
}
this.progress = 30 + (int)(((float)i / (float)this.points.Count) * 55f);
i++;
}
scg.Dictionary <Vector, scg.List <PointF> > newOutput = new scg.Dictionary <Vector, scg.List <PointF> >();
foreach (scg.KeyValuePair <Vector, scg.List <PointF> > region in output)
{
scg.List <WPointF> sort = SortRegion(region);
newOutput.Add(region.Key, new scg.List <PointF>());
foreach (WPointF pointf in sort)
{
newOutput[region.Key].Add(pointf.point);
}
}
output = newOutput;
return(output);
}
public VoronoiGraph Compute(List <Point> sites, BoundingRect bbox)
{
this.Reset();
// Initialize site event queue
var siteEvents = sites.Take(sites.Count).ToList();
/*siteEvents.Sort((a, b) =>
* {
* float r = b.y - a.y;
* if (r != 0) { return Mathf.CeilToInt(r); }
* return Mathf.CeilToInt(b.x - a.x);
* });*/
siteEvents = siteEvents.OrderByDescending(s => s.y).ToList();
// process queue
Point site = siteEvents.Last();
siteEvents.Remove(site);
int siteid = 0;
float xsitex = -Mathf.Infinity;
float xsitey = -Mathf.Infinity;
// main loop
for (; ;)
{
// we need to figure whether we handle a site or circle event
// for this we find out if there is a site event and it is
// 'earlier' than the circle event
CircleEvent circle = this.firstCircleEvent;
// add beach section
if (site && (!circle || site.y < circle.y || (site.y == circle.y && site.x < circle.x)))
{
// only if site is not a duplicate
if (site.x != xsitex || site.y != xsitey)
{
// first create cell for new site
//this.cells[siteid] = new Cell(site);
this.cells.Insert(siteid, new Cell(site));
site.id = siteid++;
// then create a beachsection for that site
this.AddBeachSection(site);
// remember last site coords to detect duplicate
xsitey = site.y;
xsitex = site.x;
}
site = siteEvents.Count > 0 ? siteEvents.Last() : null;
if (siteEvents.Count > 0)
{
siteEvents.Remove(site);
}
}
// remove beach section
else if (circle)
{
this.RemoveBeachSection(circle.arc);
}
// all done, quit
else
{
break;
}
}
// wrapping-up
this.ClipEdges(bbox);
this.CloseCells(bbox);
VoronoiGraph graph = new VoronoiGraph();
graph.sites = sites;
graph.cells = this.cells;
graph.edges = this.edges;
this.Reset();
return(graph);
}
