API Reference > geometry-core > Curve > CurveChainWithDistanceIndex

CurveChainWithDistanceIndex Class

CurveChainWithDistanceIndex is a CurvePrimitive whose fractional parameterization is proportional to true distance along a CurveChain.

  • The curve chain can be any type derived from CurveChain.
    • i.e. either a Path or a Loop

Extends

Methods

Name Description
chainDistanceToChainFraction(distance: number): number Convert distance along the chain to fraction along the chain.  
chainDistanceToFragment(distance: number, allowExtrapolation: boolean = false): undefined | PathFragment Protected Resolve a fraction of the CurveChain to a PathFragment  
clone(): undefined | CurvePrimitive Return a deep clone  
cloneTransformed(transform: Transform): undefined | CurvePrimitive Create a clone, transformed and with its own distance index.  
closestPoint(spacePoint: Point3d, extend: VariantCurveExtendParameter): undefined | CurveLocationDetail Search for the curve point that is closest to the spacePoint.  
collectCurvePrimitivesGo(collectorArray: CurvePrimitive[], smallestPossiblePrimitives: boolean): void Return an array containing only the curve primitives.  
computeAndAttachRecursiveStrokeCounts(options?: StrokeOptions, parentStrokeMap?: StrokeCountMap): void construct StrokeCountMap for each child, accumulating data to stroke count map for this primitive.  
computeStrokeCountForOptions(options?: StrokeOptions): number return the stroke count required for given options.  
curveAndChildFractionToFragment(curve: CurvePrimitive, fraction: number): undefined | PathFragment Protected Resolve a fraction within a specific curve to a fragment.  
curveLength(): number Returns the total length of curves.  
curveLengthBetweenFractions(fraction0: number, fraction1: number): number * Curve length is always positive.  
dispatchToGeometryHandler(handler: GeometryHandler): any Second step of double dispatch: call this._path.dispatchToGeometryHandler (handler)  
emitStrokableParts(dest: IStrokeHandler, options?: StrokeOptions): void Ask the curve to announce points and simple subcurve fragments for stroking.  
emitStrokes(dest: LineString3d, options?: StrokeOptions): void Add strokes to caller-supplied linestring  
endPoint(result?: Point3d): Point3d Return the end point of the primitive.  
extendRange(rangeToExtend: Range3d, transform?: Transform): void Extend (increase) rangeToExtend as needed to include these curves (optionally transformed)  
fractionToPoint(fraction: number, result?: Point3d): Point3d Return the point (x,y,z) on the curve at fractional position along the chain.  
fractionToPointAnd2Derivatives(fraction: number, result?: Plane3dByOriginAndVectors): undefined | Plane3dByOriginAndVectors Return a plane with  
fractionToPointAndDerivative(fraction: number, result?: Ray3d): Ray3d Return the point (x,y,z) and derivative on the curve at fractional position.  
fractionToPointAndUnitTangent(fraction: number, result?: Ray3d): Ray3d Returns a ray whose origin is the curve point and direction is the unit tangent.  
isAlmostEqual(other: GeometryQuery): boolean Test for equality conditions:  
isInPlane(plane: Plane3dByOriginAndUnitNormal): boolean Ask if the curve is within tolerance of a plane.  
isSameGeometryClass(other: GeometryQuery): boolean Test if other is a CurveChainWithDistanceIndex  
moveSignedDistanceFromFraction(startFraction: number, signedDistance: number, allowExtension: boolean, result?: CurveLocationDetail): CurveLocationDetail Implement moveSignedDistanceFromFraction.  
quickLength(): number Returns the total length of the path.  
reverseInPlace(): void Reverse the curve's data so that its fractional stroking moves in the opposite direction.  
startPoint(result?: Point3d): Point3d return the start point of the primitive.  
tryTransformInPlace(transform: Transform): boolean Attempt to transform in place.  
createCapture(path: CurveChain, options?: StrokeOptions): undefined | CurveChainWithDistanceIndex Static Capture (not clone) a path into a new CurveChainWithDistanceIndex  

Inherited methods

Name Inherited from Description
addMappedStrokesToLineString3D(map: StrokeCountMap, linestring: LineString3d): number CurvePrimitive * evaluate strokes at fractions indicated in a StrokeCountMap.
announceClipIntervals(_clipper: Clipper, _announce?: AnnounceNumberNumberCurvePrimitive): boolean CurvePrimitive Find intervals of this curvePrimitive that are interior to a clipper
appendPlaneIntersectionPoints(plane: PlaneAltitudeEvaluator, result: CurveLocationDetail[]): number CurvePrimitive Compute intersections with a plane.
clonePartialCurve(_fractionA: number, _fractionB: number): undefined | CurvePrimitive CurvePrimitive Return (if possible) a curve primitive which is a portion of this curve.
collectCurvePrimitives(collectorArray?: CurvePrimitive[], smallestPossiblePrimitives: boolean = false, explodeLinestrings: boolean = false): CurvePrimitive[] CurvePrimitive Return an array containing only the curve primitives.
curveLengthWithFixedIntervalCountQuadrature(fraction0: number, fraction1: number, numInterval: number, numGauss: number = 5): number CurvePrimitive * Run an integration (with a default gaussian quadrature) with a fixed fractional step
fractionAndDistanceToPointOnTangent(fraction: number, distance: number): Point3d CurvePrimitive Construct a point extrapolated along tangent at fraction.
fractionToCurvature(fraction: number): undefined | number CurvePrimitive Returns the (absolute) curvature magnitude.
fractionToFrenetFrame(fraction: number, result?: Transform): undefined | Transform CurvePrimitive Construct a frenet frame:
getFractionToDistanceScale(): undefined | number CurvePrimitive * If the curve primitive has distance-along-curve strictly proportional to curve fraction, return true
moveSignedDistanceFromFractionGeneric(startFraction: number, signedDistance: number, allowExtension: boolean, result?: CurveLocationDetail): CurveLocationDetail Protected CurvePrimitive Generic algorithm to search for point at signed distance from a fractional startPoint.
range(transform?: Transform, result?: Range3d): Range3d CurvePrimitive return the range of the entire (tree) GeometryQuery
tryTranslateInPlace(dx: number, dy: number = 0.0, dz: number = 0.0): boolean CurvePrimitive try to move the geometry by dx,dy,dz
areAlmostEqual(a: undefined | GeometryQuery, b: undefined | GeometryQuery): boolean Static CurvePrimitive apply instance method isAlmostEqual if both are defined.
installStrokeCountMap(curve: CurvePrimitive, curveMap: StrokeCountMap, parentMap?: StrokeCountMap): void Static CurvePrimitive final install step to save curveMap in curve.

Properties

Name Type Description
curvePrimitiveType Readonly "curveChainWithDistanceIndex" String name for schema properties  
path Accessor ReadOnly CurveChain Reference to the contained path.  

Inherited properties

Name Type Inherited from Description
children Accessor ReadOnly undefined | GeometryQuery[] CurvePrimitive return GeometryQuery children for recursive queries.

* leaf classes do not need to implement.
geometryCategory Readonly "curvePrimitive" CurvePrimitive String name for schema properties
isExtensibleFractionSpace Accessor ReadOnly boolean CurvePrimitive * Returns true if the curve's fraction queries extend beyond 0..1.
* Base class default implementation returns false.
* These class (and perhaps others in the future) will return true:
* LineSegment3d
* LineString3d
* Arc3d
parent undefined | any CurvePrimitive data attached by various algorithms (e.g.
strokeData undefined | StrokeCountMap CurvePrimitive data attached during stroking for facets.

Defined in

Last Updated: 29 November, 2022