API Reference > geometry-core > ArraysAndInterfaces > GrowableBlockedArray GrowableBlockedArray Class Array of contiguous doubles, indexed by block number and index within block. This is essentially a rectangular matrix (two dimensional array), with each block being a row of the matrix. Methods Name Description constructor(blockSize: number, initialBlocks: number = 8): GrowableBlockedArray addBlock(newData: number[]): void Add a new block of data. blockCapacity(): number Return the capacity in blocks (not doubles) blockIndexToDoubleIndex(blockIndex: number): number Protected convert a block index to the simple index to the underlying Float64Array. checkedComponent(blockIndex: number, componentIndex: number): undefined | number Access a single double at offset within a block, with index checking and return undefined if indexing is invalid. clear(): void clear the block count to zero, but maintain the allocated memory component(blockIndex: number, componentIndex: number): number Access a single double at offset within a block. distanceBetweenBlocks(blockIndexA: number, blockIndexB: number): number Return the distance (hypotenuse=sqrt(summed squares)) between indicated blocks distanceBetweenSubBlocks(blockIndexA: number, blockIndexB: number, iBegin: number, iEnd: number): number Return the distance (hypotenuse=sqrt(summed squares)) between block entries iBegin <= i < iEnd of indicated blocks ensureBlockCapacity(blockCapacity: number): void ensure capacity (in blocks, not doubles) getWithinBlock(blockIndex: number, indexWithinBlock: number): number Return a single value indexed within a block newBlockIndex(): number Protected Return the starting index of a block of (zero-initialized) doubles at the end. popBlock(): void reduce the block count by one. sortIndicesLexical(compareBlocks: BlockComparisonFunction = GrowableBlockedArray.compareLexicalBlock): Uint32Array Return an array of block indices sorted per compareLexicalBlock function compareLexicalBlock(data: Float64Array, blockSize: number, ia: number, ib: number): number Static compare two blocks in simple lexical order. Properties Name Type Description _blockSize Protected number number of numbers per block in the array. _data Protected Float64Array underlying contiguous, oversized buffer. _inUse Protected number Number of blocks (matrix rows) in use. numBlocks Accessor ReadOnly number computed property: length (in blocks, not doubles) numPerBlock Accessor ReadOnly number property: number of data values per block Defined in geometry3d/GrowableBlockedArray.ts Line 16 Last Updated: 11 June, 2024