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CreateCurve Method

Creates a new geometric ellipse or elliptical arc object.

Namespace: Autodesk.Revit.DB
Assembly: RevitAPI (in RevitAPI.dll) Version: 17.0.0.0 (17.0.1090.0)
Since: 2017_subscription_update

Syntax

C# 
public static Curve CreateCurve(
	XYZ center,
	double xRadius,
	double yRadius,
	XYZ xAxis,
	XYZ yAxis,
	double startParameter,
	double endParameter
)
Visual Basic 
Public Shared Function CreateCurve ( _
	center As XYZ, _
	xRadius As Double, _
	yRadius As Double, _
	xAxis As XYZ, _
	yAxis As XYZ, _
	startParameter As Double, _
	endParameter As Double _
) As Curve
Visual C++ 
public:
static Curve^ CreateCurve(
	XYZ^ center, 
	double xRadius, 
	double yRadius, 
	XYZ^ xAxis, 
	XYZ^ yAxis, 
	double startParameter, 
	double endParameter
)

Parameters

center
Type: Autodesk.Revit.DB XYZ
The center.
xRadius
Type: System Double
The x vector radius of the ellipse.
yRadius
Type: System Double
The y vector radius of the ellipse.
xAxis
Type: Autodesk.Revit.DB XYZ
The x axis to define the ellipse plane. Must be normalized.
yAxis
Type: Autodesk.Revit.DB XYZ
The y axis to define the ellipse plane. Must be normalized.
startParameter
Type: System Double
The raw parameter value at the start of the ellipse.
endParameter
Type: System Double
The raw parameter value at the end of the ellipse.

Return Value

The new ellipse or elliptical arc.

Remarks

If the angle range is equal to or greater than 2 * PI, the curve will be automatically converted to an unbounded ellipse. If xRadius and yRadius are almost equal, the curve will be returned as an arc.

Exceptions

Exception Condition
Autodesk.Revit.Exceptions ArgumentNullException A non-optional argument was NULL
Autodesk.Revit.Exceptions ArgumentOutOfRangeException The given value for xRadius must be greater than 0 and no more than 30000 feet. -or- The given value for yRadius must be greater than 0 and no more than 30000 feet. -or- xAxis is not length 1.0. -or- yAxis is not length 1.0.
Autodesk.Revit.Exceptions ArgumentsInconsistentException The vectors xAxis and yAxis are not perpendicular. -or- Start parameter must be less than end parameter. -or- Curve length is too small for Revit's tolerance (as identified by Application.ShortCurveTolerance).

See Also