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CircularArc3dExtensionGetTangentsTo Method (CircularArc3d, Point3d)

Gets the tangents between the active CircularArc3d instance complete circle and a point.

Namespace:  Gile.AutoCAD.Geometry
Assembly:  GeometryExtensions (in GeometryExtensions.dll) Version: 2.0.0.0 (2.0.0.0)
Syntax
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public static LineSegment3d[] GetTangentsTo(
	this CircularArc3d arc,
	Point3d pt
)

Parameters

arc
Type: CircularArc3d
The instance to which the method applies.
pt
Type: Point3d
The Point2d to which tangents are searched.

Return Value

Type: LineSegment3d
An array of LineSegement3d representing the tangents (2) or null if there is none.

Usage Note

In Visual Basic and C#, you can call this method as an instance method on any object of type CircularArc3d. When you use instance method syntax to call this method, omit the first parameter. For more information, see Extension Methods (Visual Basic) or Extension Methods (C# Programming Guide).
Exceptions
ExceptionCondition
Exception eNonCoplanarGeometry is thrown if the objects do not lies on the same plane.
Remarks
Tangents start points are on the object to which this method applies, end points on the point passed as argument. Tangents are always returned in the same order: the tangent on the left side of the line from the circular arc center to the point before the other one.
See Also