Class AcGeNurbsCurve

A NURBS curve implementation that can be used by other curve classes

Index

Constructors

Methods

controlPoints degree getParameterRange getPoints isClosed knots length point weights byKnotsControlPointsWeights byPoints createClosedCurve

Constructors

constructor

new AcGeNurbsCurve(
    degree: number,
    knots: number[],
    controlPoints: AcGeVector3dLike[],
    weights?: number[],
): AcGeNurbsCurve
Parameters
- degree: number
- knots: number[]
- controlPoints: AcGeVector3dLike[]
- Optionalweights: number[]
Returns AcGeNurbsCurve
- Defined in geometry/AcGeNurbsCurve.ts:25

Methods

controlPoints

controlPoints(): AcGeVector3dLike[]
Get the control points

Returns AcGeVector3dLike[]
- Defined in geometry/AcGeNurbsCurve.ts:56

degree

degree(): number
Get the degree of the NURBS curve

Returns number
- Defined in geometry/AcGeNurbsCurve.ts:42

getParameterRange

getParameterRange(): { end: number; start: number }
Get the valid parameter range for this curve

Returns { end: number; start: number }
- Defined in geometry/AcGeNurbsCurve.ts:141

getPoints

getPoints(divisions: number): number[][]
Get points along the curve
Parameters
- divisions: number
  Number of divisions to create
Returns number[][]
Array of points along the curve
- Defined in geometry/AcGeNurbsCurve.ts:152

isClosed

isClosed(tolerance?: number): boolean
Check if the curve is closed by comparing start and end points
Parameters
- tolerance: number = 1e-6
Returns boolean
- Defined in geometry/AcGeNurbsCurve.ts:167

knots

knots(): number[]
Get the knot vector

Returns number[]
- Defined in geometry/AcGeNurbsCurve.ts:49

length

length(): number
Calculate curve length using numerical integration

Returns number
- Defined in geometry/AcGeNurbsCurve.ts:85

point

point(u: number): number[]
Calculate a point on the curve at parameter u
Parameters
- u: number
Returns number[]
- Defined in geometry/AcGeNurbsCurve.ts:70

weights

weights(): number[]
Get the weights

Returns number[]
- Defined in geometry/AcGeNurbsCurve.ts:63

`Static`byKnotsControlPointsWeights

byKnotsControlPointsWeights(
    degree: number,
    knots: number[],
    controlPoints: AcGeVector3dLike[],
    weights?: number[],
): AcGeNurbsCurve
Create a NURBS curve from control points and knots
Parameters
- degree: number
- knots: number[]
- controlPoints: AcGeVector3dLike[]
- Optionalweights: number[]
Returns AcGeNurbsCurve
- Defined in geometry/AcGeNurbsCurve.ts:99

`Static`byPoints

byPoints(
    points: number[][],
    degree: number,
    parameterization?: AcGeKnotParameterizationType,
): AcGeNurbsCurve
Create a NURBS curve from fit points using interpolation
Parameters
- points: number[][]
- degree: number
- parameterization: AcGeKnotParameterizationType = 'Uniform'
Returns AcGeNurbsCurve
- Defined in geometry/AcGeNurbsCurve.ts:111

`Static`createClosedCurve

createClosedCurve(
    points: AcGeVector3dLike[],
    degree: number,
    parameterization?: AcGeKnotParameterizationType,
): AcGeNurbsCurve
Create a closed NURBS curve using Catmull-Rom interpolation for smooth closure
Parameters
- points: AcGeVector3dLike[]
- degree: number
- parameterization: AcGeKnotParameterizationType = 'Chord'
Returns AcGeNurbsCurve
- Defined in geometry/AcGeNurbsCurve.ts:182