private void AddObstaclePortEntranceToGraph(ObstaclePortEntrance entrance) {
// Note: As discussed in ObstaclePortEntrance.AddToGraph, oport.VisibilityBorderIntersect may be
// on a border shared with another obstacle, in which case we'll extend into that obstacle. This
// should be fine if we're consistent about "touching means overlapped", so that a path that comes
// through the other obstacle on the shared border is OK.
VisibilityVertex borderVertex = VisGraph.FindVertex(entrance.VisibilityBorderIntersect);
if (null != borderVertex) {
entrance.ExtendFromBorderVertex(TransUtil, borderVertex, this.portSpliceLimitRectangle, RouteToCenterOfObstacles);
return;
}
// There may be no scansegment to splice to before we hit an adjacent obstacle, so if the edge
// is null there is nothing to do.
VisibilityVertex targetVertex;
double weight = entrance.IsOverlapped ? ScanSegment.OverlappedWeight : ScanSegment.NormalWeight;
VisibilityEdge edge = this.FindorCreateNearestPerpEdge(entrance.MaxVisibilitySegment.End, entrance.VisibilityBorderIntersect,
entrance.OutwardDirection, weight /*checkForObstacle*/, out targetVertex);
if (null != edge) {
entrance.AddToAdjacentVertex(TransUtil, targetVertex, this.portSpliceLimitRectangle, RouteToCenterOfObstacles);
}
}
