Loop Class

A Loop is a curve chain that is the boundary of a closed (planar) loop.

Extends

Methods

Name Description
constructor(): Loop Test if other is an instance of Loop  
announceToCurveProcessor(processor: RecursiveCurveProcessor, indexInParent: number = -1): void invoke processor.announceLoop(this, indexInParent)  
cloneEmptyPeer(): Loop Create a new Loop with no children  
cloneStroked(options?: StrokeOptions): AnyCurve 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)  
isSameGeometryClass(other: GeometryQuery): boolean test if other is a Loop  
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: GrowableXYZArray | Point3d[]): Loop Static Create a loop from an array of points  

Inherited methods

Name Inherited from Description
checkForNonLinearPrimitives(): boolean CurveCollection return true if the curve collection has any primitives other than LineSegment3d and LineString3d
clone(): CurveCollection | undefined CurveCollection Return a deep copy.
cloneTransformed(transform: Transform): CurveCollection | undefined CurveCollection Create a deep copy of transformed curves.
cloneWithExpandedLineStrings(): CurveCollection | undefined CurveCollection Create a deep copy with all linestrings expanded to multiple LineSegment3d.
collectCurvePrimitives(): CurvePrimitive[] CurveCollection Return an array containing only the curve primitives.
cyclicCurvePrimitive(index: number): CurvePrimitive | undefined CurveChain Return the [index] curve primitive, using modulo to mapindex to the cyclic indexing.
extendRange(range: Range3d, transform?: Transform): void CurveChain invoke curve.extendRange(range, transform) for each child
getChild(i: number): CurvePrimitive | undefined CurveChain Return a child by index
getPackedStrokes(options?: StrokeOptions): GrowableXYZArray | undefined CurveChain Stroke the chain into a simple xyz array.
isAlmostEqual(other: GeometryQuery): boolean GeometryQuery test for exact structure and nearly identical geometry.
maxGap(): number CurveCollection return the max gap between adjacent primitives in Path and Loop collections.
range(transform?: Transform, result?: Range3d): Range3d GeometryQuery return the range of the entire (tree) GeometryQuery
reverseChildrenInPlace(): void CurveChain Reverse each child curve (in place)
Reverse the order of the children in the CurveChain array.
sumLengths(): number CurveCollection Return the sum of the lengths of all contained curves.
tryAddChild(child: AnyCurve | undefined): boolean CurveChain add a child curve.
tryTransformInPlace(transform: Transform): boolean CurveCollection Apply transform recursively to children
tryTranslateInPlace(dx: number, dy: number = 0, dz: number = 0): boolean GeometryQuery try to move the geometry by dx,dy,dz
createCurveLocationDetailOnAnyCurvePrimitive(source: GeometryQuery | undefined, fraction: number = 0.5): CurveLocationDetail | undefined Static CurveCollection * Find any curve primitive in the source.

Properties

Name Type Description
curveCollectionType "loop" = "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
_curves Protected CurvePrimitive[] CurveChain The curve primitives in the chain.
children Accessor ReadOnly CurvePrimitive[] CurveChain Return the array of CurvePrimitive
geometryCategory "curveCollection" = "curveCollection" CurveCollection String name for schema properties
isAnyRegionType Accessor ReadOnly boolean CurveCollection Return true for planar region types:
Loop
ParityRegion
* UnionRegion
isClosedPath Accessor ReadOnly boolean CurveCollection 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 ReadOnly boolean CurveCollection Return true for a Path, i.e. a chain of curves joined head-to-tail

Defined in

Last Updated: 13 October, 2019