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

Namespace: Autodesk.Revit.DB
Assembly: RevitAPI (in RevitAPI.dll) Version: 21.0.0.0 (21.1.1.109)
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

CopyC#
// 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);
CopyVB.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

ExceptionCondition
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).

See Also