public static void InsertSite(Site siteBeforeInsertion, GPoint point)
{
//creating the new site
Site first = siteBeforeInsertion;
Site second = first.Next;
var s = new Site(first, point, second);
}
public static Site GetPreviousSite(SmoothedPolyline sm, GPoint point)
{
Site prevSite = sm.HeadSite;
Site nextSite = prevSite.Next;
do
{
if (BetweenSites(prevSite, nextSite, point))
{
return(prevSite);
}
prevSite = nextSite;
nextSite = nextSite.Next;
} while (nextSite != null);
return(null);
}
internal static SmoothedPolyline CreateUnderlyingPolylineForSelfEdge(GPoint p0, double dx, double dy)
{
var p1 = p0 + new GPoint(0, dy);
var p2 = p0 + new GPoint(dx, dy);
var p3 = p0 + new GPoint(dx, -dy);
var p4 = p0 + new GPoint(0, -dy);
var site = new Site(p0);
var polyline = new SmoothedPolyline(site);
site = new Site(site, p1);
site = new Site(site, p2);
site = new Site(site, p3);
site = new Site(site, p4);
new Site(site, p0);
return(polyline);
}
public static Tuple <Site, PolylineCornerType> AnalyzeInsertOrDeletePolylineCorner(SmoothedPolyline sm, GPoint point, double tolerance)
{
//tolerance += SelectedEdge.Edge.Attr.LineWidth;
Site corner = FindCornerForEdit(sm, point, tolerance);
if (corner != null)
{
return(new Tuple <Site, PolylineCornerType>(corner, PolylineCornerType.CornerToDelete));
}
corner = GetPreviousSite(sm, point);
if (corner != null)
{
return(new Tuple <Site, PolylineCornerType>(corner, PolylineCornerType.PreviousCornerForInsertion));
}
return(null);
}
public static Site FindCornerForEdit(SmoothedPolyline underlyingPolyline, GPoint mousePoint, double tolerance)
{
Site site = underlyingPolyline.HeadSite.Next;
tolerance *= tolerance; //square the tolerance
do
{
if (site.Previous == null || site.Next == null)
{
continue; //don't return the first and the last corners
}
GPoint diff = mousePoint - site.Point;
if (diff * diff <= tolerance)
{
return(site);
}
site = site.Next;
} while (site.Next != null);
return(null);
}
public static void DeleteSite(Site site)
{
site.Previous.Next = site.Next; //removing the site from the list
site.Next.Previous = site.Previous;
}
static bool BetweenSites(Site prevSite, Site nextSite, GPoint point)
{
double par = GPoint.ClosestParameterOnLineSegment(point, prevSite.Point, nextSite.Point);
return(par > 0.1 && par < 0.9);
}
