API Reference > geometry-core > ArraysAndInterfaces > IndexedXYZCollectionInterval IndexedXYZCollectionInterval Class Reference to an interval of the indices of an IndexedXYZCollection. Extends IndexedCollectionInterval<IndexedXYZCollection> Methods Name Description constructor(points: IndexedXYZCollection, base: number, limit: number): IndexedXYZCollectionInterval Protected Inherited methods Name Inherited from Description advanceBegin(): boolean IndexedCollectionInterval<IndexedXYZCollection> Add one to this.begin. advanceEnd(): boolean IndexedCollectionInterval<IndexedXYZCollection> advance this.end (but do not go beyond this.points.length) return true if the interval is still live. advanceToHead(other: IndexedCollectionInterval<IndexedXYZCollection>): boolean IndexedCollectionInterval<IndexedXYZCollection> Advance this.begin to (other.begin), i.e. advanceToTail(other: IndexedCollectionInterval<IndexedXYZCollection>): boolean IndexedCollectionInterval<IndexedXYZCollection> Advance this.begin to (other.end-1), i.e. localIndexToParentIndex(localIndex: number): undefined | number IndexedCollectionInterval<IndexedXYZCollection> Return (if possible) the parent index corresponding to localIndex restrictEnd(): void IndexedCollectionInterval<IndexedXYZCollection> restrict this.end to this.points.length setFrom(other: IndexedCollectionInterval<IndexedXYZCollection>, base?: number, limit?: number): void IndexedCollectionInterval<IndexedXYZCollection> Set this interval from another, with conditional replacements: createBeginEnd<T extends CollectionWithLength>(points: T, begin: number, end: number): IndexedCollectionInterval<T> Static IndexedCollectionInterval<IndexedXYZCollection> Create an interval which matches a collection from start <= i < end. createBeginLength<T extends CollectionWithLength>(points: T, begin: number, length: number): IndexedCollectionInterval<T> Static IndexedCollectionInterval<IndexedXYZCollection> Create an interval which matches a collection from start <= i < end. createComplete<T extends CollectionWithLength>(points: T): IndexedCollectionInterval<T> Static IndexedCollectionInterval<IndexedXYZCollection> Create an interval which matches a complete indexed collection. Inherited properties Name Type Inherited from Description begin number IndexedCollectionInterval<IndexedXYZCollection> lower limit of index range end number IndexedCollectionInterval<IndexedXYZCollection> upper limit (beyond) index range. isNonEmpty Accessor ReadOnly boolean IndexedCollectionInterval<IndexedXYZCollection> Return true if length is 1 or more isSingleton Accessor ReadOnly boolean IndexedCollectionInterval<IndexedXYZCollection> Return true if the length is exactly 1 isValidSubset Accessor ReadOnly boolean IndexedCollectionInterval<IndexedXYZCollection> Return true if* the interval is empty (the empty set is a subset of all sets!)* all indices in its range are valid. length Accessor ReadOnly number IndexedCollectionInterval<IndexedXYZCollection> Return the number of steps possible with current begin and end points IndexedXYZCollection IndexedCollectionInterval<IndexedXYZCollection> Any collection that has a .length member or property Defined in geometry3d/IndexedCollectionInterval.ts Line 118 Last Updated: 12 June, 2024