Revit 2025 API

ArcCreate(Plane, Double, Double, Double) Method

Creates a new geometric arc object based on plane, radius, and angles.

Namespace: Autodesk.Revit.DB
Assembly: RevitAPI (in RevitAPI.dll) Version: 25.0.0.0 (25.0.0.0)

Syntax

public static Arc Create(
	Plane plane,
	double radius,
	double startAngle,
	double endAngle
)

Public Shared Function Create ( 
	plane As Plane,
	radius As Double,
	startAngle As Double,
	endAngle As Double
) As Arc

public:
static Arc^ Create(
	Plane^ plane, 
	double radius, 
	double startAngle, 
	double endAngle
)

static member Create : 
        plane : Plane * 
        radius : float * 
        startAngle : float * 
        endAngle : float -> Arc

Parameters

plane Plane: The plane which the arc resides. The plane's origin is 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).

Return Value

Arc
The new arc.

Exceptions

Exception	Condition
ArgumentNullException	A non-optional argument was NULL
ArgumentOutOfRangeException	The given value for radius must be greater than 0 and no more than 30000 feet.
ArgumentsInconsistentException	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++

Copy

Arc CreateArcByGivingPlane(Autodesk.Revit.ApplicationServices.Application application, Plane plane)
{
    // Create an arc which is placed on the plane and whose center is the plane's origin
    double radius = 10;
    double startAngle = 0;      // The unit is radian
    double endAngle = 2 * Math.PI;        // this arc will be a circle
    return Arc.Create(plane, radius, startAngle, endAngle);
}

Private Function CreateArcByGivingPlane(application As Autodesk.Revit.ApplicationServices.Application, plane As Plane) As Arc
    ' Create an arc which is placed on the plane and whose center is the plane's origin
    Dim radius As Double = 10
    Dim startAngle As Double = 0
    ' The unit is radian
    Dim endAngle As Double = 2 * Math.PI
    ' this arc will be a circle
    Return Arc.Create(plane, radius, startAngle, endAngle)
End Function

No code example is currently available or this language may not be supported.

Reference

Arc Class

Create Overload

Autodesk.Revit.DB Namespace

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