Class Polygon2d

Inheritance
Object
Polygon2d
Implements
Inherited Members
Namespace: g3
Assembly: cs.temp.dll.dll
Syntax
public class Polygon2d : IDuplicatable<Polygon2d>

Constructors

Polygon2d()

Declaration
public Polygon2d()

Polygon2d(Polygon2d)

Declaration
public Polygon2d(Polygon2d copy)
Parameters
Type Name Description
Polygon2d copy

Polygon2d(Vector2d[])

Declaration
public Polygon2d(Vector2d[] v)
Parameters
Type Name Description
Vector2d[] v

Polygon2d(VectorArray2d)

Declaration
public Polygon2d(VectorArray2d v)
Parameters
Type Name Description
VectorArray2d v

Polygon2d(IEnumerable<Vector2d>)

Declaration
public Polygon2d(IEnumerable<Vector2d> copy)
Parameters
Type Name Description
IEnumerable<Vector2d> copy

Polygon2d(IList<Vector2d>)

Declaration
public Polygon2d(IList<Vector2d> copy)
Parameters
Type Name Description
IList<Vector2d> copy

Polygon2d(Double[])

Declaration
public Polygon2d(double[] values)
Parameters
Type Name Description
Double[] values

Polygon2d(Func<Int32, Vector2d>, Int32)

Declaration
public Polygon2d(Func<int, Vector2d> SourceF, int N)
Parameters
Type Name Description
Func<Int32, Vector2d> SourceF
Int32 N

Fields

Timestamp

Declaration
public int Timestamp
Field Value
Type Description
Int32

vertices

Declaration
protected List<Vector2d> vertices
Field Value
Type Description
List<Vector2d>

Properties

ArcLength

Declaration
public double ArcLength { get; }
Property Value
Type Description
Double

Area

Declaration
public double Area { get; }
Property Value
Type Description
Double

AverageEdgeLength

Declaration
public double AverageEdgeLength { get; }
Property Value
Type Description
Double

Bounds

Declaration
public AxisAlignedBox2d Bounds { get; }
Property Value
Type Description
AxisAlignedBox2d

IsClockwise

Declaration
public bool IsClockwise { get; }
Property Value
Type Description
Boolean

Item[Int32]

Declaration
public Vector2d this[int key] { get; set; }
Parameters
Type Name Description
Int32 key
Property Value
Type Description
Vector2d

Perimeter

Declaration
public double Perimeter { get; }
Property Value
Type Description
Double

SignedArea

Declaration
public double SignedArea { get; }
Property Value
Type Description
Double

Start

Declaration
public Vector2d Start { get; }
Property Value
Type Description
Vector2d

VertexCount

Declaration
public int VertexCount { get; }
Property Value
Type Description
Int32

Vertices

Declaration
public ReadOnlyCollection<Vector2d> Vertices { get; }
Property Value
Type Description
ReadOnlyCollection<Vector2d>

Methods

AppendVertex(Vector2d)

Declaration
public void AppendVertex(Vector2d v)
Parameters
Type Name Description
Vector2d v

AppendVertices(IEnumerable<Vector2d>)

Declaration
public void AppendVertices(IEnumerable<Vector2d> v)
Parameters
Type Name Description
IEnumerable<Vector2d> v

Chamfer(Double, Double, Double)

Declaration
public void Chamfer(double chamfer_dist, double minConvexAngleDeg = 30, double minConcaveAngleDeg = 30)
Parameters
Type Name Description
Double chamfer_dist
Double minConvexAngleDeg
Double minConcaveAngleDeg

Contains(Polygon2d)

Declaration
public bool Contains(Polygon2d o)
Parameters
Type Name Description
Polygon2d o
Returns
Type Description
Boolean

Contains(Segment2d)

Checks that all points on a segment are within the area defined by the Polygon2d.

Declaration
public bool Contains(Segment2d o)
Parameters
Type Name Description
Segment2d o
Returns
Type Description
Boolean

Contains(Vector2d)

Returns true if point inside polygon, using fast winding-number computation

Declaration
public bool Contains(Vector2d P)
Parameters
Type Name Description
Vector2d P
Returns
Type Description
Boolean

DistanceSquared(Vector2d)

Declaration
public double DistanceSquared(Vector2d p)
Parameters
Type Name Description
Vector2d p
Returns
Type Description
Double

DistanceSquared(Vector2d, out Int32, out Double)

Declaration
public double DistanceSquared(Vector2d p, out int iNearSeg, out double fNearSegT)
Parameters
Type Name Description
Vector2d p
Int32 iNearSeg
Double fNearSegT
Returns
Type Description
Double

Duplicate()

Declaration
public virtual Polygon2d Duplicate()
Returns
Type Description
Polygon2d

FindIntersections(Polygon2d)

Declaration
public List<Vector2d> FindIntersections(Polygon2d o)
Parameters
Type Name Description
Polygon2d o
Returns
Type Description
List<Vector2d>

GetBounds()

Declaration
public AxisAlignedBox2d GetBounds()
Returns
Type Description
AxisAlignedBox2d

GetNormal(Int32)

Normal at vertex i, which is perp to tangent direction, which is not so intuitive if edges have very different lengths. Points "inward" for clockwise polygon, outward for counter-clockwise

Declaration
public Vector2d GetNormal(int i)
Parameters
Type Name Description
Int32 i
Returns
Type Description
Vector2d

GetNormal(Int32, Double)

Declaration
public Vector2d GetNormal(int iSeg, double segT)
Parameters
Type Name Description
Int32 iSeg
Double segT
Returns
Type Description
Vector2d

GetNormal_FaceAvg(Int32)

Construct normal at poly vertex by averaging face normals. This is equivalent (?) to angle-based normal, ie is local/independent of segment lengths. Points "inward" for clockwise polygon, outward for counter-clockwise

Declaration
public Vector2d GetNormal_FaceAvg(int i)
Parameters
Type Name Description
Int32 i
Returns
Type Description
Vector2d

GetTangent(Int32)

Declaration
public Vector2d GetTangent(int i)
Parameters
Type Name Description
Int32 i
Returns
Type Description
Vector2d

Intersects(Polygon2d)

Declaration
public bool Intersects(Polygon2d o)
Parameters
Type Name Description
Polygon2d o
Returns
Type Description
Boolean

Intersects(Segment2d)

Checks if any point on a segment is within the area defined by the Polygon2d.

Declaration
public bool Intersects(Segment2d o)
Parameters
Type Name Description
Segment2d o
Returns
Type Description
Boolean

MakeCircle(Double, Int32, Double)

Declaration
public static Polygon2d MakeCircle(double fRadius, int nSteps, double angleShiftRad = 0)
Parameters
Type Name Description
Double fRadius
Int32 nSteps
Double angleShiftRad
Returns
Type Description
Polygon2d

MakeRectangle(Vector2d, Double, Double)

Declaration
public static Polygon2d MakeRectangle(Vector2d center, double width, double height)
Parameters
Type Name Description
Vector2d center
Double width
Double height
Returns
Type Description
Polygon2d

MinimalBoundingBox(Double)

Return minimal bounding box of vertices, computed to epsilon tolerance

Declaration
public Box2d MinimalBoundingBox(double epsilon)
Parameters
Type Name Description
Double epsilon
Returns
Type Description
Box2d

NeighboursP(Int32, ref Vector2d, ref Vector2d)

Declaration
public void NeighboursP(int iVertex, ref Vector2d p0, ref Vector2d p1)
Parameters
Type Name Description
Int32 iVertex
Vector2d p0
Vector2d p1

NeighboursV(Int32, ref Vector2d, ref Vector2d, Boolean)

Declaration
public void NeighboursV(int iVertex, ref Vector2d v0, ref Vector2d v1, bool bNormalize = false)
Parameters
Type Name Description
Int32 iVertex
Vector2d v0
Vector2d v1
Boolean bNormalize

OpeningAngleDeg(Int32)

Declaration
public double OpeningAngleDeg(int iVertex)
Parameters
Type Name Description
Int32 iVertex
Returns
Type Description
Double

PointAt(Int32, Double)

Declaration
public Vector2d PointAt(int iSegment, double fSegT)
Parameters
Type Name Description
Int32 iSegment
Double fSegT
Returns
Type Description
Vector2d

PolyOffset(Double)

offset polygon by fixed distance, by offsetting and intersecting edges. CCW polygon offsets "outwards", CW "inwards".

Declaration
public void PolyOffset(double dist)
Parameters
Type Name Description
Double dist

RemoveVertex(Int32)

Declaration
public void RemoveVertex(int idx)
Parameters
Type Name Description
Int32 idx

Reverse()

Declaration
public void Reverse()

Rotate(Matrix2d, Vector2d)

Declaration
public Polygon2d Rotate(Matrix2d rotation, Vector2d origin)
Parameters
Type Name Description
Matrix2d rotation
Vector2d origin
Returns
Type Description
Polygon2d

Scale(Vector2d, Vector2d)

Declaration
public Polygon2d Scale(Vector2d scale, Vector2d origin)
Parameters
Type Name Description
Vector2d scale
Vector2d origin
Returns
Type Description
Polygon2d

Segment(Int32)

Declaration
public Segment2d Segment(int iSegment)
Parameters
Type Name Description
Int32 iSegment
Returns
Type Description
Segment2d

SegmentItr()

Declaration
public IEnumerable<Segment2d> SegmentItr()
Returns
Type Description
IEnumerable<Segment2d>

SetVertices(List<Vector2d>, Boolean)

Declaration
public void SetVertices(List<Vector2d> newVertices, bool bTakeOwnership)
Parameters
Type Name Description
List<Vector2d> newVertices
Boolean bTakeOwnership

Simplify(Double, Double, Boolean)

Declaration
public void Simplify(double clusterTol = 0.0001, double lineDeviationTol = 0.01, bool bSimplifyStraightLines = true)
Parameters
Type Name Description
Double clusterTol
Double lineDeviationTol
Boolean bSimplifyStraightLines

Transform(ITransform2)

Declaration
public Polygon2d Transform(ITransform2 xform)
Parameters
Type Name Description
ITransform2 xform
Returns
Type Description
Polygon2d

Transform(Func<Vector2d, Vector2d>)

Declaration
public Polygon2d Transform(Func<Vector2d, Vector2d> transformF)
Parameters
Type Name Description
Func<Vector2d, Vector2d> transformF
Returns
Type Description
Polygon2d

Translate(Vector2d)

Declaration
public Polygon2d Translate(Vector2d translate)
Parameters
Type Name Description
Vector2d translate
Returns
Type Description
Polygon2d

VerticesItr(Boolean)

Declaration
public IEnumerable<Vector2d> VerticesItr(bool bRepeatFirstAtEnd)
Parameters
Type Name Description
Boolean bRepeatFirstAtEnd
Returns
Type Description
IEnumerable<Vector2d>

VtxNormalOffset(Double, Boolean)

Offset each point by dist along vertex normal direction (ie tangent-perp) CCW polygon offsets "outwards", CW "inwards".

Declaration
public void VtxNormalOffset(double dist, bool bUseFaceAvg = false)
Parameters
Type Name Description
Double dist
Boolean bUseFaceAvg

WindingIntegral(Vector2d)

Compute winding integral at point P

Declaration
public double WindingIntegral(Vector2d P)
Parameters
Type Name Description
Vector2d P
Returns
Type Description
Double

Implements