![]() |
This document is archived and information here might be outdated. Recommended version. |
Constructs an arc with a common tangent to the input segment, a given central angle and a chord length.
[Visual Basic .NET] Public Sub ConstructTangentAngleChord ( _ ByVal Segment As ISegment, _ ByVal atStart As Boolean, _ ByVal isCCW As Boolean, _ ByVal CentralAngle As Double, _ ByVal chordDistance As Double _ )
[C#] public void ConstructTangentAngleChord ( ISegment Segment, bool atStart, bool isCCW, double CentralAngle, double chordDistance );
[C++]
HRESULT ConstructTangentAngleChord(
ISegment* Segment,
VARIANT_BOOL atStart,
VARIANT_BOOL isCCW,
double CentralAngle,
double chordDistance
);
[C++] Parameters Segment
Segment is a parameter of type ISegment* atStart
atStart is a parameter of type bool isCCW
isCCW is a parameter of type bool CentralAngle
CentralAngle is a parameter of type double chordDistance
chordDistance is a parameter of type double
Constructs a CircularArc given the Tangent Segment, the desired segment endpoint (the From Point), the desired orientation, the desired Central Angle, and the desired Chord Length. The Central Angle is measured in radians. Only IsMinor CircularArcs can be constructed. The Central Angle should be between 0 and Pi (half CircularArc) for the CircularArc to be properly constructed as expected.
-isCCW stands for "is counter clockwise"
private void ConstructTangentAngleChord() { IConstructCircularArc constructCircularArc = new CircularArcClass(); ICircularArc circularArc = constructCircularArc as ICircularArc; IPoint fromPoint = new PointClass(); fromPoint.PutCoords(100, 100); IPoint toPoint = new PointClass(); toPoint.PutCoords(100, 400); ILine line = new LineClass(); line.PutCoords(fromPoint, toPoint); //The angles should be in Radians (Radians = Degrees * PI/180) constructCircularArc.ConstructTangentAngleChord(line as ISegment, false, true, Math.PI, 100); String report = "Length : " + circularArc.Length + "\n" + "Radius : " + circularArc.Radius + "\n" + "Chord Height : " + circularArc.ChordHeight + "\n" + "Central Angle (Rad) : " + circularArc.CentralAngle + "\n" + "From Angle (Rad) : " + circularArc.FromAngle + "\n" + "To Angle (Rad) : " + circularArc.ToAngle + "\n" + "Center Point : " + circularArc.CenterPoint.X + " , " + circularArc.CenterPoint.Y + "\n" + "From Point : " + circularArc.FromPoint.X + " , " + circularArc.FromPoint.Y + "\n" + "To Point : " + circularArc.ToPoint.X + " , " + circularArc.ToPoint.Y; System.Windows.Forms.MessageBox.Show(report); }
Private Sub ConstructTangentAngleChord()
Dim pConstructCircularArc As ESRI.ArcGIS.Geometry.IConstructCircularArc
Dim pCArc As ESRI.ArcGIS.Geometry.ICircularArc
Dim Pi As Double
Dim pToPoint As ESRI.ArcGIS.Geometry.IPoint
Dim pFromPoint As ESRI.ArcGIS.Geometry.IPoint
Dim pPoint As ESRI.ArcGIS.Geometry.IPoint
Dim pLine1 As ESRI.ArcGIS.Geometry.ILine
pConstructCircularArc = New ESRI.ArcGIS.Geometry.CircularArc
pCArc = pConstructCircularArc
Pi = 4 * Math.Atan(1) 'Calculate the value of pi.
pFromPoint = New ESRI.ArcGIS.Geometry.Point
pToPoint = New ESRI.ArcGIS.Geometry.Point
pLine1 = New ESRI.ArcGIS.Geometry.Line
pFromPoint.PutCoords(100, 100)
pToPoint.PutCoords(100, 400)
pLine1.PutCoords(pFromPoint, pToPoint)
pPoint = New ESRI.ArcGIS.Geometry.Point
pPoint.PutCoords(200, 400)
'The angles should be in Radians (Radians = Degrees * PI/180)
pConstructCircularArc.ConstructTangentAngleChord(pLine1, False, False, Pi, 100)
Debug.Print("Length : " & pCArc.Length)
Debug.Print("Radius : " & pCArc.Radius)
Debug.Print("Chord Height : " & pCArc.ChordHeight)
Debug.Print("Central Angle (Rad) : " & pCArc.CentralAngle)
Debug.Print("From Angle (Rad) : " & pCArc.FromAngle)
Debug.Print("To Angle (Rad) : " & pCArc.ToAngle)
Debug.Print("Center Point : " & pCArc.CenterPoint.X & " , " & pCArc.CenterPoint.Y)
Debug.Print("From Point : " & pCArc.FromPoint.X & " , " & pCArc.FromPoint.Y)
Debug.Print("To Point : " & pCArc.ToPoint.X & " , " & pCArc.ToPoint.Y)
End Sub
IConstructCircularArc Interface | IConstructCircularArc.ConstructTangentAngleTangent Method | IConstructCircularArc.ConstructTangentAngleChord Method | IConstructCircularArc.ConstructTangentArcTangent Method | IConstructCircularArc.ConstructTangentAngleArc Method | IConstructCircularArc.ConstructTangentChordTangent Method | IConstructCircularArc.ConstructTangentRadiusAngle Method | IConstructCircularArc.ConstructTangentRadiusArc Method | IConstructCircularArc.ConstructTangentAndPoint Method | IConstructCircularArc.ConstructTangentRadiusChord Method | IConstructCircularArc.ConstructTangentRadiusTangent Method | IConstructCircularArc.ConstructTangentChordArc Method