Creates a new geometric arc object based on center, radius, unit vectors, and angles.

Namespace: Autodesk.Revit.DB
Assembly: RevitAPI (in RevitAPI.dll) Version: 2015.0.0.0 (2015.0.0.0)
Since: 2014

Syntax

C#
`public static Arc Create( XYZ center, double radius, double startAngle, double endAngle, XYZ xAxis, XYZ yAxis )`

Visual Basic
`Public Shared Function Create ( _ center As XYZ, _ radius As Double, _ startAngle As Double, _ endAngle As Double, _ xAxis As XYZ, _ yAxis As XYZ _ ) As Arc`

Visual C++
`public: static Arc^ Create( XYZ^ center, double radius, double startAngle, double endAngle, XYZ^ xAxis, XYZ^ yAxis )`

Parameters

center: Type: Autodesk.Revit.DB XYZ
The center of the arc.

radius: Type: System Double
The radius of the arc.

startAngle: Type: System Double
The start angle of the arc (in radians).

endAngle: Type: System Double
The end angle of the arc (in radians).

xAxis: Type: Autodesk.Revit.DB XYZ
The x axis to define the arc plane. Must be normalized.

yAxis: Type: Autodesk.Revit.DB XYZ
The y axis to define the arc plane. Must be normalized.

Return Value

The new arc.

Remarks

If the angle range is equal to or greater than 2 * PI, the curve will be automatically converted to an unbounded circle.

Examples

Copy C#

// Create a new arc defined by its center, radios, angles and 2 axes
double radius = 10;
double startAngle = 0;      // In radian
double endAngle = Math.PI;        // In radian
XYZ center = new XYZ(5, 0, 0);
XYZ xAxis = new XYZ(1, 0, 0);   // The x axis to define the arc plane. Must be normalized
XYZ yAxis = new XYZ(0, 1, 0);   // The y axis to define the arc plane. Must be normalized

Arc arc = Arc.Create(center, radius, startAngle, endAngle, xAxis, yAxis);

Copy VB.NET

' Create a new arc defined by its center, radios, angles and 2 axes
Dim radius As Double = 10
Dim startAngle As Double = 0
' In radian
Dim endAngle As Double = Math.PI
' In radian
Dim center As New XYZ(5, 0, 0)
Dim xAxis As New XYZ(1, 0, 0)
' The x axis to define the arc plane. Must be normalized
Dim yAxis As New XYZ(0, 1, 0)
' The y axis to define the arc plane. Must be normalized
Dim arc__1 As Arc = Arc.Create(center, radius, startAngle, endAngle, xAxis, yAxis)

Exceptions

Exception	Condition
Autodesk.Revit.Exceptions ArgumentNullException	A non-optional argument was NULL
Autodesk.Revit.Exceptions ArgumentOutOfRangeException	xAxis is not length 1.0. -or- yAxis is not length 1.0. -or- The given value for radius must be between 0 and 30000 feet.
Autodesk.Revit.Exceptions ArgumentsInconsistentException	The vectors xAxis and yAxis are not perpendicular. -or- Start angle must be less than end angle. -or- Curve length is too small for Revit's tolerance (as identified by Application.ShortCurveTolerance).

Create Method (XYZ, Double, Double, Double, XYZ, XYZ)