EllipseCreateCurve Method

Creates a new geometric ellipse or elliptical arc object.

Namespace: Autodesk.Revit.DB
Assembly: RevitAPI (in RevitAPI.dll) Version: 25.0.0.0 (25.0.0.0)
Syntax
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public static Curve CreateCurve(
	XYZ center,
	double xRadius,
	double yRadius,
	XYZ xAxis,
	XYZ yAxis,
	double startParameter,
	double endParameter
)

Parameters

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

Return Value

Curve
The new ellipse or elliptical arc.
Exceptions
ExceptionCondition
ArgumentNullException A non-optional argument was NULL
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.
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).
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.
See Also