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This document is archived and information here might be outdated. Recommended version. |
IConstructAngle.ConstructThreePoint Method (ArcObjects .NET 10.8 SDK)
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This document is archived and information here might be outdated. Recommended version. |
Constructs the angle included in three points.
[Visual Basic .NET] Public Function ConstructThreePoint ( _ ByVal from As IPoint, _ ByVal through As IPoint, _ ByVal to As IPoint _ ) As Double
[C#] public double ConstructThreePoint ( IPoint from, IPoint through, IPoint to );
[C++]
HRESULT ConstructThreePoint(
IPoint* from,
IPoint* through,
IPoint* to
);
[C++] Parameters from
from is a parameter of type IPoint* through
through is a parameter of type IPoint* to
to is a parameter of type IPoint*
ConstructThreePoint returns the Angle formed by three input points. The returned angle is the smaller angle formed by an imaginary line from the first to the second point and the second to the third point. The measure of the constructed angle is between -Pi and Pi. The returned angle can also be thought of as the displacement angle of a line from the second point to the third point with a baseline formed by the first point and second point.
// Calculates the angle defined by the 3 points.
public void constructAngle()
{
IPoint fromPoint = new ESRI.ArcGIS.Geometry.Point();
IPoint throughPoint = new ESRI.ArcGIS.Geometry.Point();
IPoint toPoint = new ESRI.ArcGIS.Geometry.Point();
fromPoint.PutCoords(1, 0);
toPoint.PutCoords(1, 1);
throughPoint.PutCoords(0, 0);
GeometryEnvironment geometryEnvironment = new GeometryEnvironment();
IConstructAngle constructAngle = geometryEnvironment as IConstructAngle;
double angle = constructAngle.ConstructThreePoint(fromPoint, throughPoint, toPoint);
System.Windows.Forms.MessageBox.Show("The constructed angle is " + angle);
}
' Calculates the angle defined by the 3 points.
Public Sub t_construct_angle()
Dim pPtFrom As IPoint
Dim pPtThrough As IPoint
Dim pPtTo As IPoint
pPtFrom = New Point
pPtThrough = New Point
pPtTo = New Point
pPtFrom.PutCoords(1, 0)
pPtTo.PutCoords(1, 1)
pPtThrough.PutCoords(0, 0)
Dim pCAngle As IConstructAngle
Dim pGEnv As GeometryEnvironment
pGEnv = New GeometryEnvironment
pCAngle = pGEnv
Dim dAngle As Double
dAngle = pCAngle.ConstructThreePoint(pPtFrom, pPtThrough, pPtTo)
MsgBox("The constructed angle is " & dAngle)
End Sub
IConstructAngle Interface | IConstructAngle.ConstructThreePoint Method | IConstructAngle.ConstructLine Method