Arc.Create(XYZ, Double, Double, Double, XYZ, XYZ) Method

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

Namespace: Autodesk.Revit.DB
Assembly: RevitAPI (in RevitAPI.dll) Version: 26.3.0.0 (26.3.0.0)

Syntax

C#

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

Parameters

center XYZ: The center of the arc.
radius Double: The radius of the arc.
startAngle Double: The start angle of the arc (in radians).
endAngle Double: The end angle of the arc (in radians).
xAxis XYZ: The x axis to define the arc plane. Must be normalized.
yAxis XYZ: The y axis to define the arc plane. Must be normalized.

Return Value

Arc
The new arc.

Exceptions

Exception	Condition
ArgumentNullException	A non-optional argument was NULL
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.
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).

Remarks

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

Example

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);

VB

' 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)