Loop Class
A Loop
is a curve chain that is the boundary of a closed (planar) loop.
@see Curve Collections learning article.
Extends
Methods
Name | Description | |
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constructor(): Loop | Test if other is an instance of Loop |
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announceToCurveProcessor(processor: RecursiveCurveProcessor, indexInParent: number-1): void | Invoke processor.announceLoop(this, indexInParent) |
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cloneEmptyPeer(): Loop | Create a new Loop with no children |
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cloneStroked(options?: StrokeOptions): Loop | Create a loop with the stroked form of this loop. | |
dgnBoundaryType(): number | Return the boundary type (2) of a corresponding MicroStation CurveVector | |
dispatchToGeometryHandler(handler: GeometryHandler): any | Second step of double dispatch: call handler.handleLoop(this) |
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isSameGeometryClass(other: GeometryQuery): boolean | Test if other is a Loop |
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create(...curves: CurvePrimitive[]): Loop Static | Create a loop from variable length list of CurvePrimitives | |
createArray(curves: CurvePrimitive[]): Loop Static | Create a loop from an array of curve primitives | |
createPolygon(points: IndexedXYZCollection | Point3d[]): Loop Static | Create a loop from an array of points |
Inherited methods
Name | Inherited from | Description |
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checkForNonLinearPrimitives(): boolean Inherited | CurveChain | Return true if the curve collection has any primitives other than LineSegment3d and LineString3d |
childIndex(target: CurvePrimitive, alsoSearchProxies?: boolean): undefined | number Inherited | CurveChain | Return the index where target is found in the array of children. |
clone(): CurveCollection Inherited | CurveChain | Return a deep copy. |
cloneTransformed(transform: Transform): undefined | CurveCollection Inherited | CurveChain | Create a deep copy of transformed curves. |
cloneWithExpandedLineStrings(): CurveCollection Inherited | CurveChain | Create a deep copy with all linestrings broken down into multiple LineSegment3d. |
closestPoint(spacePoint: Point3d, _extend: VariantCurveExtendParameterfalse, result?: CurveLocationDetail): undefined | CurveLocationDetail Inherited | CurveChain | Return the closest point on the contained curves. |
collectCurvePrimitives(collectorArray?: CurvePrimitive[], smallestPossiblePrimitives: booleanfalse, explodeLineStrings: booleanfalse): CurvePrimitive[] Inherited | CurveChain | Return an array containing all CurvePrimitives in the instance. |
cyclicCurvePrimitive(index: number, cyclic: booleantrue): undefined | CurvePrimitive Inherited | CurveChain | Return the curve primitive at the given index , optionally using modulo to map index to the cyclic indexing. |
endPoint(result?: Point3d): undefined | Point3d Inherited | CurveChain | Return the end point of the curve chain (end point of the last child). |
extendRange(range: Range3d, transform?: Transform): void Inherited | CurveChain | Invoke curve.extendRange(range, transform) for each child |
getChild(i: number): undefined | CurvePrimitive Inherited | CurveChain | Return a child by index |
getPackedStrokes(options?: StrokeOptions): undefined | GrowableXYZArray Inherited | CurveChain | Stroke the chain into a simple xyz array. |
isAlmostEqual(other: GeometryQuery): boolean Inherited | CurveChain | Test for exact structure and nearly identical geometry. |
isAnyRegion(): this is AnyRegion Inherited | CurveChain | Type guard for AnyRegion |
isLoop(): this is Loop Inherited | CurveChain | Type guard for Loop |
isPath(): this is Path Inherited | CurveChain | Type guard for Path |
maxGap(): number Inherited | CurveChain | Return the max gap between adjacent primitives in Path and Loop collections. |
primitiveIndexAndFractionToCurveLocationDetailPointAndDerivative(index: number, fraction: number, cyclic: booleanfalse, result?: CurveLocationDetail): undefined | CurveLocationDetail Inherited | CurveChain | Evaluate an indexed curve at a fraction. |
projectedParameterRange(ray: Vector3d | Ray3d, lowHigh?: Range1d): undefined | Range1d Inherited | CurveChain | Project instance geometry (via dispatch) onto the given ray, and return the extreme fractional parameters |
range(transform?: Transform, result?: Range3d): Range3d Inherited | CurveChain | Return the range of the entire GeometryQuery tree. |
reverseChildrenInPlace(): void Inherited | CurveChain | Reverse each child curve (in place) |
startPoint(result?: Point3d): undefined | Point3d Inherited | CurveChain | Return the start point of the curve chain (start point of the first child). |
sumLengths(): number Inherited | CurveChain | Return the sum of the lengths of all contained curves. |
tryAddChild(child: AnyCurve): boolean Inherited | CurveChain | Add a child curve. |
tryTransformInPlace(transform: Transform): boolean Inherited | CurveChain | Apply transform recursively to children |
tryTranslateInPlace(dx: number, dy: number0.0, dz: number0.0): boolean Inherited | CurveChain | Try to move the geometry by dx,dy,dz. |
areAlmostEqual(a: GeometryQuery, b: GeometryQuery): boolean Static Inherited | CurveChain | Apply instance method isAlmostEqual if both are defined. |
createCurveLocationDetailOnAnyCurvePrimitive(source: GeometryQuery, fraction: number0.5): undefined | CurveLocationDetail Static Inherited | CurveChain | Find any CurvePrimitive in the source and evaluate it at the given fraction. |
Properties
Name | Type | Description | |
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curveCollectionType Readonly | "loop" | String name for schema properties | |
isInner | boolean | Tag value that can be set to true for user code to mark inner and outer loops. |
Inherited properties
Name | Type | Inherited from | Description |
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_curves Protected Inherited | CurvePrimitive[] | CurveChain | The curve primitives in the chain. |
children Accessor Inherited ReadOnly | CurvePrimitive[] | CurveChain | Return the array of CurvePrimitive |
geometryCategory Readonly Inherited | "curveCollection" | CurveChain | String name for schema properties |
isAnyRegionType Accessor Inherited ReadOnly | boolean | CurveChain | Return true for planar region types: * Loop * ParityRegion * UnionRegion |
isClosedPath Accessor Inherited ReadOnly | boolean | CurveChain | Return true for a single-loop planar region type, i.e. Loop .* This is NOT a test for physical closure of a Path . |
isOpenPath Accessor Inherited ReadOnly | boolean | CurveChain | Return true for a Path , i.e. a chain of curves joined head-to-tail |
Defined in
- curve/Loop.ts Line 25
Last Updated: 17 December, 2024
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