public static IEnumerable <IPolyLine2D> BuildOffset(IEnumerable <IPolyLine2D> polylines, double delta, JoinType joinType, EndType endType, double mitterLimit, bool sort = false, double maxDiscretizationAngle = 5)
{
PolyLine2DDiscretizator discretizator = new PolyLine2DDiscretizator
{
NumberOfTiles = 1,
LengthOfTile = double.MaxValue,
Angle = maxDiscretizationAngle
};
bool containsCircArc = joinType == JoinType.jtRound || endType == EndType.etOpenRound;
var polygons = new List <List <IntPoint> >(polylines.Count());
foreach (var polyline in polylines)
{
if (!containsCircArc)
{
containsCircArc |= polyline.Segments.FirstOrDefault(s => s is CircularArcSegment2D) != null;
}
var polygon = CreatePolygon(polyline, discretizator, true);
polygons.Add(polygon);
}
var co = new ClipperOffset(mitterLimit);
co.AddPaths(polygons, joinType, endType);
var solution = new List <List <IntPoint> >();
co.Execute(ref solution, delta * ClipperScale);
foreach (var polygon in solution)
{
yield return(CreatePolyline(polygon, containsCircArc, maxDiscretizationAngle + 1));
}
}
protected static List <IntPoint> CreatePolygon(IPolyLine2D polyline, PolyLine2DDiscretizator discretizator, bool counterClockwise)
{
IPolygon2D polygon = new Polygon2D();
discretizator.Discretize(polyline, ref polygon, null);
return(CreatePolygon(polygon, counterClockwise));
}
public static IEnumerable <IPolyLine2D> BuildOffset(IPolyLine2D polyline, double delta, JoinType joinType, EndType endType, double mitterLimit, bool sort = false, double maxDiscretizationAngle = 5)
{
PolyLine2DDiscretizator discretizator = new PolyLine2DDiscretizator
{
NumberOfTiles = 1,
LengthOfTile = double.MaxValue,
Angle = maxDiscretizationAngle
};
var p = CreatePolygon(polyline, discretizator, true);
bool containsCircArc = joinType == JoinType.jtRound || endType == EndType.etOpenRound;
if (!containsCircArc)
{
containsCircArc = polyline.Segments.FirstOrDefault(s => s is CircularArcSegment2D) != null;
}
var co = new ClipperOffset(mitterLimit);
co.AddPath(p, joinType, endType);
var solution = new List <List <IntPoint> >();
co.Execute(ref solution, delta * ClipperScale);
if (sort && polyline.IsClosed && !containsCircArc && joinType == JoinType.jtMiter && (endType == EndType.etClosedLine || endType == EndType.etClosedPolygon) && solution.Count == 1)
{
// try to sort offset path according to source path
var newPolyline = CreatePolyline(solution[0], containsCircArc, maxDiscretizationAngle + 1);
TrySortSegments(polyline, newPolyline, delta);
yield return(newPolyline);
}
else
{
foreach (var polygon in solution)
{
yield return(CreatePolyline(polygon, containsCircArc, maxDiscretizationAngle + 1));
}
}
}
public static IRegion2D Simplify(IRegion2D region, double maxDiscretizationAngle = 5)
{
PolyLine2DDiscretizator discretizator = new PolyLine2DDiscretizator
{
NumberOfTiles = 1,
LengthOfTile = double.MaxValue,
Angle = maxDiscretizationAngle
};
var polyline = region.Outline;
var containsCircArc = polyline.Segments.FirstOrDefault(s => s is CircularArcSegment2D) != null;
var polygon = CreatePolygon(polyline, discretizator, true);
var solution = Clipper.SimplifyPolygon(polygon);
if (solution.Count == 1)
{
var newRegion = new Region2D(CreatePolyline(solution[0], containsCircArc, maxDiscretizationAngle + 1));
foreach (var opening in region.Openings)
{
containsCircArc = opening.Segments.FirstOrDefault(s => s is CircularArcSegment2D) != null;
polygon = CreatePolygon(opening, discretizator, true);
solution = Clipper.SimplifyPolygon(polygon);
if (solution.Count == 1)
{
newRegion.Openings.Add(CreatePolyline(solution[0], containsCircArc, maxDiscretizationAngle + 1));
}
else
{
throw new System.NotImplementedException();
}
}
return(newRegion);
}
throw new System.NotImplementedException();
}