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# NURBS1RailSweepSurface : NURBSSurface

This class defines a dependent 1-Rail Sweep surface. A 1-Rail Sweep surface uses at least two curves. One curve, the "rail," defines one edge of the surface. The other curves define the surface's cross sections. The cross-section curves should intersect the rail curve. If the cross sections don't intersect the rail, the resulting surface is unpredictable.

Constructors

    NURBS1RailSweepSurface [<property>:<val>]...

Any of the object's properties may be set via optional keyword arguments on the constructor.

    getObject <nurbsset> <index>

Properties

    <nurbs1railsweepsurface>.rail : integer

The parent rail curve by NURBSet index.

    <nurbs1railsweepsurface>.railID : integer

The parent rail curve by NURBSId.

    <nurbs1railsweepsurface>.numCurves : integer

The number of cross-section curves.

    <nurbs1railsweepsurface>.parallel : boolean

If true , ensures that the sweep surface's normal is parallel to the rail.

    <nurbs1railsweepsurface>.axisTM : matrix3

The axis of the sweep.

Methods

    appendCurve <nurbs1railsweepsurface> <curve> [flip:<boolean>] [startPoint:<float>]

Adds a curve to the end of the list of cross-section curves by specifying the index in the NURBSSet. If flip:true is specified, the cross-section curve is reversed. startPoint specifies the start point on the parent curve. startPoint is applicable only if the parent is a closed curve.

    appendCurveByID <nurbs1railsweepsurface> <curveID> [flip:<boolean>] [startPoint:<float>]

Adds a curve to the end of the list of cross-section curves by specifying the NURBSId. If flip:true is specified, the cross-section curve is reversed. startPoint specifies the start point on the parent curve. startPoint is applicable only if the parent is a closed curve.

    getCurve <nurbs1railsweepsurface> <index>

    setCurve <nurbs1railsweepsurface> <index> <curve>

Get or set the indexed cross-section curve by NURBSSet index.

    getCurveID <nurbs1railsweepsurface> <index>
    setCurveByID <nurbs1railsweepsurface> <index> <curveID>

Get or set the indexed cross-section curve by NURBSId.

    getFlip <nurbs1railsweepsurface> <index>
    setFlip <nurbs1railsweepsurface> <index> <boolean>

Get or set whether the indexed cross-section curve is reversed.

    getCurveStartPoint <nurbs1railsweepsurface> <index>
    setCurveStartPoint <nurbs1railsweepsurface> <index> <float>

Get or set the start point of the indexed cross-section curve on the parent curve. The start point is applicable only if the parent is a closed curve.

#### See Also

- NURBSSurface

- NURBSObject

- Value Common Properties, Operators, and Methods