//when we check for inclusion we expand the box by slack
internal Geometry Hit(P2 p, double slack, EntityFilterDelegate filter)
{
if (filter != null && this.geometry != null)
{
if (filter(geometry.dObject) == false)
{
return(null);
}
}
if (left == null)
{
if (Box.Contains(p, slack))
{
Line line = geometry as Line;
if (line != null)
{
if (Tessellator.DistToSegm(p, line.start, line.end) < slack + line.LineWidth / 2)
{
return(line);
}
return(null);
}
else if (Box.Contains(p))
{
return(geometry);
}
return(null);
}
else
{
return(null);
}
}
if (left.Box.Contains(p, slack))
{
Geometry g = left.Hit(p, slack, filter);
if (g != null)
{
return(g);
}
}
if (right.Box.Contains(p, slack))
{
Geometry g = right.Hit(p, slack, filter);
if (g != null)
{
return(g);
}
}
return(null);
}
//when we check for inclusion we expand the box by slack
internal Geometry Hit(P2 p, double slack)
{
if (l == null)
{
if (Box.Contains(p, slack))
{
Line line = geometry as Line;
if (line != null)
{
if (Tessellator.DistToSegm(p, line.start, line.end) < slack + line.LineWidth / 2)
{
return(line);
}
return(null);
}
else if (Box.Contains(p))
{
return(geometry);
}
return(null);
}
else
{
return(null);
}
}
if (l.Box.Contains(p, slack))
{
Geometry g = l.Hit(p, slack);
if (g != null)
{
return(g);
}
}
if (r.Box.Contains(p, slack))
{
Geometry g = r.Hit(p, slack);
if (g != null)
{
return(g);
}
}
return(null);
}
//when we check for inclusion we expand the box by slack
internal Geometry Hit(P2 p, double slack, EntityFilterDelegate filter, List <Geometry> subgraphCandidates)
{
if (filter != null && geometry != null)
{
if (filter(geometry.dObject) == false)
{
return(null);
}
}
if (left == null)
{
if (Box.Contains(p, slack))
{
Line line = geometry as Line;
if (line != null)
{
if (Tessellator.DistToSegm(p, line.start, line.end) < slack + line.LineWidth / 2)
{
return(line);
}
return(null);
}
if (Box.Contains(p))
{
var subg = geometry.dObject.DrawingObject as Subgraph;
if (subg != null)
{
subgraphCandidates.Add(geometry);
}
else
{
return(geometry);
}
}
return(null);
}
else
{
return(null);
}
}
if (left.Box.Contains(p, slack))
{
Geometry g = left.Hit(p, slack, filter, subgraphCandidates);
if (g != null)
{
return(g);
}
}
if (right.Box.Contains(p, slack))
{
Geometry g = right.Hit(p, slack, filter, subgraphCandidates);
if (g != null)
{
return(g);
}
}
return(null);
}