Reference TPolylineSet

  TPolylineSet = record
  public
    Ref: cpPolylineSet;
    class operator Implicit(const Value: TPolylineSet): cpPolylineSet; inline;
    class operator Implicit(const Value: cpPolylineSet): TPolylineSet; inline;
    { Create an empty polyline set }
    class function Create: TPolylineSet; static;
    { Create a set of convex hulls which match a concave polygon to within tol.
      The polygon is closed and its winding corrected if needed. }
    class function ConvexDecomposition(Polyline: TPolyline; Tol: Float): TPolylineSet; static;
    { Trace the anti-aliased contours of an image where the samples cross a
      threshold. The box is sampled in a grid of at least two samples in each
      direction. }
    class function MarchSoft(const Box: cpBB; XSamples, YSamples: Integer; Threshold: Float; Sample: TMarchSample): TPolylineSet; overload; static;
    { Trace outlines from samples, with smooth edges }
    class function MarchSoft(const Box: cpBB; XSamples, YSamples: Integer; Threshold: Float; Sample: cpMarchSampleFunc; Data: Pointer = nil): TPolylineSet; overload; static;
    { Trace the aliased contours of an image where the samples cross a threshold }
    class function MarchHard(const Box: cpBB; XSamples, YSamples: Integer; Threshold: Float; Sample: TMarchSample): TPolylineSet; overload; static;
    { Trace outlines from samples, with hard edges }
    class function MarchHard(const Box: cpBB; XSamples, YSamples: Integer; Threshold: Float; Sample: cpMarchSampleFunc; Data: Pointer = nil): TPolylineSet; overload; static;
    { Free the set and optionally the polylines it holds }
    procedure Free(FreeLines: Boolean = True);
    { True if this refers to nothing }
    function IsNil: Boolean; inline;
    { Add a segment which starts a new polyline, extends or joins polylines, or
      closes a polyline }
    procedure AddSegment(const A, B: TVec2);
    { Enumerates the polylines of the set }
    function GetEnumerator: TPolylineSetEnumerator;
    { The number of polylines }
    property Count: Integer read GetCount;
    { The polylines by index }
    property Line[Index: Integer]: TPolyline read GetLine; default;
  end;