// Use the internal static xxxInstance properties to get an instance.
private ScanDirection(Directions directionAlongScanLine)
{
System.Diagnostics.Debug.Assert(StaticGraphUtility.IsAscending(directionAlongScanLine),
"directionAlongScanLine must be ascending");
Direction = directionAlongScanLine;
DirectionAsPoint = CompassVector.ToPoint(Direction);
PerpDirection = (Directions.North == directionAlongScanLine) ? Directions.East : Directions.North;
PerpDirectionAsPoint = CompassVector.ToPoint(PerpDirection);
OppositeDirection = CompassVector.OppositeDir(directionAlongScanLine);
}
internal Point GetInteriorVertexPoint(Point outerVertex)
{
return(ApproximateComparer.Round(outerVertex + (CompassVector.ToPoint(DirectionToInside) * BoundaryWidth)));
}
