Class DataUtil

constructor

• new DataUtil(): DataUtil

• Returns DataUtil

Staticcrc32table

StaticUInt8ArrayToDataURL

• UInt8ArrayToDataURL(uint8array, width, height): string

• Converts a Uint8Array to a data URL for image display.

  Parameters

  • uint8array: Uint8Array

    The image data as Uint8Array
  • width: number

    Image width in pixels
  • height: number

    Image height in pixels

  Returns string

  Data URL string for the image

StaticaccessArrayBufferAsImage

• accessArrayBufferAsImage(arrayBuffer, imageType): string

• Converts ArrayBuffer or Uint8Array to an image data URL.

  Parameters

  • arrayBuffer: ArrayBuffer | Uint8Array

    The image data buffer
  • imageType: string

    Type/format of the image

  Returns string

  Data URL string for the image

StaticaccessBinaryAsImage

• accessBinaryAsImage(bufferViewIndex, json, buffer, mimeType): string

• Accesses binary data from a buffer view and converts it to an image data URL.

  Parameters

  • bufferViewIndex: number

    Index of the buffer view in the JSON
  • json: any

    JSON object containing buffer view information
  • buffer: ArrayBuffer | Uint8Array

    The source buffer data
  • mimeType: string

    MIME type of the image

  Returns string

  Data URL string for the image

StaticaddPaddingBytes

• addPaddingBytes(originalByteLength, byteAlign): number

• Adds padding bytes to achieve the specified byte alignment.

  Parameters

  • originalByteLength: number

    The original byte length
  • byteAlign: number

    The byte alignment requirement

  Returns number

  The padded byte length

StaticarrayBufferToString

• arrayBufferToString(arrayBuffer): string

• Converts an ArrayBuffer to a string using TextDecoder when available.

  Parameters

  • arrayBuffer: ArrayBuffer

    The ArrayBuffer to convert

  Returns string

  String representation of the buffer data

Staticatob

• atob(str): string

• Decodes a base64 string, compatible with both browser and Node.js environments.

  Parameters

  • str: string

    The base64 string to decode

  Returns string

  Decoded binary string

Staticbase64ToArrayBuffer

• base64ToArrayBuffer(base64): ArrayBufferLike

• Converts a base64 string to an ArrayBuffer (browser environment only).

  Parameters

  • base64: string

    The base64 string to convert

  Returns ArrayBufferLike

  ArrayBuffer containing the decoded data

  Throws

  Error if not running in browser environment

Staticbtoa

• btoa(str): string

• Encodes a string to base64 format, compatible with both browser and Node.js environments.

  Parameters

  • str: string

    The string to encode

  Returns string

  Base64 encoded string

StaticcalcPaddingBytes

• calcPaddingBytes(originalByteLength, byteAlign): number

• Calculates the number of padding bytes needed for byte alignment.

  Parameters

  • originalByteLength: number

    The original byte length
  • byteAlign: number

    The byte alignment requirement

  Returns number

  Number of padding bytes needed

StaticcopyArrayBuffer

• copyArrayBuffer(param0): ArrayBuffer

• Copies data from source ArrayBuffer to destination ArrayBuffer.

  Parameters

  • param0: {
        copyByteLength: number;
        dist: ArrayBuffer;
        distByteOffset: number;
        src: ArrayBuffer;
        srcByteOffset: number;
    }

    Copy configuration object

    • copyByteLength: number

      Number of bytes to copy

    • dist: ArrayBuffer

      Destination ArrayBuffer

    • distByteOffset: number

      Byte offset in destination buffer (default: 0)

    • src: ArrayBuffer

      Source ArrayBuffer

    • srcByteOffset: number

      Byte offset in source buffer

  Returns ArrayBuffer

  The destination ArrayBuffer

StaticcopyArrayBufferAs4Bytes

• copyArrayBufferAs4Bytes(param0): ArrayBuffer

• Copies data using 4-byte aligned operations from source to destination ArrayBuffer.

  Parameters

  • param0: {
        copyByteLength: number;
        dist: ArrayBuffer;
        distByteOffset: number;
        src: ArrayBuffer;
        srcByteOffset: number;
    }

    Copy configuration object

    • copyByteLength: number

      Number of bytes to copy (must be 4-byte aligned)

    • dist: ArrayBuffer

      Destination ArrayBuffer

    • distByteOffset: number

      Byte offset in destination buffer (must be 4-byte aligned)

    • src: ArrayBuffer

      Source ArrayBuffer

    • srcByteOffset: number

      Byte offset in source buffer (must be 4-byte aligned)

  Returns ArrayBuffer

  The destination ArrayBuffer

  Throws

  Error if byte offsets are not 4-byte aligned

StaticcopyArrayBufferAs4BytesWithPadding

• copyArrayBufferAs4BytesWithPadding(param0): ArrayBuffer

• Copies data using 4-byte aligned operations with padding to achieve 4-byte alignment.

  Parameters

  • param0: {
        copyByteLength: number;
        dist: ArrayBuffer;
        distByteOffset: number;
        src: ArrayBuffer;
        srcByteOffset: number;
    }

    Copy configuration object

    • copyByteLength: number

      Number of bytes to copy

    • dist: ArrayBuffer

      Destination ArrayBuffer

    • distByteOffset: number

      Byte offset in destination buffer

    • src: ArrayBuffer

      Source ArrayBuffer

    • srcByteOffset: number

      Byte offset in source buffer

  Returns ArrayBuffer

  The destination ArrayBuffer

StaticcopyArrayBufferWithPadding

• copyArrayBufferWithPadding(param0): ArrayBuffer

• Copies data from source ArrayBuffer to destination ArrayBuffer with padding if needed.

  Parameters

  • param0: {
        copyByteLength: number;
        dist: ArrayBuffer;
        distByteOffset: number;
        src: ArrayBuffer;
        srcByteOffset: number;
    }

    Copy configuration object

    • copyByteLength: number

      Number of bytes to copy

    • dist: ArrayBuffer

      Destination ArrayBuffer

    • distByteOffset: number

      Byte offset in destination buffer

    • src: ArrayBuffer

      Source ArrayBuffer

    • srcByteOffset: number

      Byte offset in source buffer

  Returns ArrayBuffer

  The destination ArrayBuffer

StaticcreateBlobImageUriFromUint8Array

• createBlobImageUriFromUint8Array(uint8Array, mimeType): string

• Creates a blob image URI from a Uint8Array.

  Parameters

  • uint8Array: Uint8Array

    The image data as Uint8Array
  • mimeType: string

    MIME type of the image

  Returns string

  Blob URL string for the image

StaticcreateDefaultGltfOptions

• createDefaultGltfOptions(): GltfLoadOption

• Creates default options for glTF loading operations.

  Returns GltfLoadOption

  Default GltfLoadOption configuration object

StaticcreateImageFromUri

• createImageFromUri(uri, mimeType): RnPromise<HTMLImageElement>

• Creates an HTMLImageElement from a URI with proper CORS handling.

  Parameters

  • uri: string

    The image URI
  • mimeType: string

    MIME type of the image

  Returns RnPromise<HTMLImageElement>

  Promise that resolves to the loaded HTMLImageElement

StaticcreateUint8ArrayFromBufferViewInfo

• createUint8ArrayFromBufferViewInfo(json, bufferViewIndex, buffer): Uint8Array

• Creates a Uint8Array from buffer view information in glTF or RnM2 format.

  Parameters

  • json: RnM2 | glTF1

    The JSON object containing buffer view information
  • bufferViewIndex: number

    Index of the buffer view
  • buffer: ArrayBuffer | Uint8Array

    The source buffer data

  Returns Uint8Array

  Uint8Array view of the specified buffer region

StaticdataUriToArrayBuffer

• dataUriToArrayBuffer(dataUri): ArrayBuffer

• Converts a data URI to an ArrayBuffer.

  Parameters

  • dataUri: string

    The data URI string to convert

  Returns ArrayBuffer

  ArrayBuffer containing the decoded data

StaticdetectTransparentPixelExistence

• detectTransparentPixelExistence(image, threshold?): boolean

• Detects if an image contains transparent pixels below a specified threshold.

  Parameters

  • image: HTMLCanvasElement | HTMLImageElement | ImageData

    The image to analyze (HTMLImageElement, HTMLCanvasElement, or ImageData)
  • threshold: number = 1.0

    Alpha threshold value (default: 1.0)

  Returns boolean

  True if transparent pixels are found, false otherwise

StaticfetchArrayBuffer

• fetchArrayBuffer(uri): Promise<Result<ArrayBuffer, unknown>>

• Fetches an ArrayBuffer from a URI using the Fetch API.

  Parameters

  • uri: string

    The URI to fetch from

  Returns Promise<Result<ArrayBuffer, unknown>>

  Promise that resolves to a Result containing the ArrayBuffer or error

StaticgetCopy

• getCopy(param0): ArrayBuffer

• Creates a copy of an ArrayBuffer with specified parameters.

  Parameters

  • param0: {
        copyByteLength: number;
        distByteOffset: number;
        src: ArrayBuffer;
        srcByteOffset: number;
    }

    Copy configuration object

    • copyByteLength: number

      Number of bytes to copy

    • distByteOffset: number

      Byte offset in destination buffer

    • src: ArrayBuffer

      Source ArrayBuffer

    • srcByteOffset: number

      Byte offset in source buffer

  Returns ArrayBuffer

  Copied ArrayBuffer

StaticgetCopyAs4Bytes

• getCopyAs4Bytes(param0): ArrayBuffer

• Creates a copy of an ArrayBuffer using 4-byte aligned operations.

  Parameters

  • param0: {
        copyByteLength: number;
        distByteOffset: number;
        src: ArrayBuffer;
        srcByteOffset: number;
    }

    Copy configuration object

    • copyByteLength: number

      Number of bytes to copy (must be 4-byte aligned)

    • distByteOffset: number

      Byte offset in destination buffer (must be 4-byte aligned)

    • src: ArrayBuffer

      Source ArrayBuffer

    • srcByteOffset: number

      Byte offset in source buffer (must be 4-byte aligned)

  Returns ArrayBuffer

  Copied ArrayBuffer

  Throws

  Error if byte offsets are not 4-byte aligned

StaticgetExtension

• getExtension(fileName): string

• Extracts the file extension from a filename.

  Parameters

  • fileName: string

    The filename to extract extension from

  Returns string

  File extension string

StaticgetImageType

• getImageType(imageType): string

• Gets the appropriate data URL prefix for a given image type.

  Parameters

  • imageType: string

    The image type or MIME type

  Returns string

  Data URL prefix string

StaticgetMimeTypeFromExtension

• getMimeTypeFromExtension(extension): string

• Gets the MIME type from a file extension.

  Parameters

  • extension: string

    The file extension

  Returns string

  MIME type string

StaticgetNearestPowerOfTwo

• getNearestPowerOfTwo(x): number

• Gets the nearest power of two value for a given number.

  Parameters

  • x: number

    The input value

  Returns number

  The nearest power of two value

StaticgetResizedCanvas

• getResizedCanvas(image, maxSize): [HTMLCanvasElement, number, number]

• Resizes an image to fit within specified dimensions while maintaining aspect ratio.

  Parameters

  • image: HTMLImageElement

    The source HTMLImageElement
  • maxSize: number

    Maximum size for the largest dimension

  Returns [HTMLCanvasElement, number, number]

  Tuple containing the resized canvas, width, and height

StaticisNode

• isNode(): boolean

• Determines if the current environment is Node.js.

  Returns boolean

  True if running in Node.js environment, false otherwise

StaticloadResourceAsync

• loadResourceAsync(resourceUri, isBinary, resolveCallback, rejectCallback): Promise<any>

• Loads a resource asynchronously with support for both binary and text data.

  Parameters

  • resourceUri: string

    URI of the resource to load
  • isBinary: boolean

    Whether to load as binary data
  • resolveCallback: Function

    Callback function for successful loading
  • rejectCallback: Function

    Callback function for error handling

  Returns Promise<any>

  Promise that resolves with the loaded resource

StaticnormalizedInt16ArrayToFloat32Array

• normalizedInt16ArrayToFloat32Array(from): Float32Array

• Converts normalized Int16Array values to Float32Array.

  Parameters

  • from: number[] | Int16Array

    Source Int16Array or number array

  Returns Float32Array

  Float32Array with normalized values

StaticnormalizedInt8ArrayToFloat32Array

• normalizedInt8ArrayToFloat32Array(from): Float32Array

• Converts normalized Int8Array values to Float32Array.

  Parameters

  • from: number[] | Int8Array

    Source Int8Array or number array

  Returns Float32Array

  Float32Array with normalized values

StaticnormalizedUint16ArrayToFloat32Array

• normalizedUint16ArrayToFloat32Array(from): Float32Array

• Converts normalized Uint16Array values to Float32Array.

  Parameters

  • from: number[] | Uint16Array

    Source Uint16Array or number array

  Returns Float32Array

  Float32Array with normalized values

StaticnormalizedUint8ArrayToFloat32Array

• normalizedUint8ArrayToFloat32Array(from): Float32Array

• Converts normalized Uint8Array values to Float32Array.

  Parameters

  • from: number[] | Uint8Array

    Source Uint8Array or number array

  Returns Float32Array

  Float32Array with normalized values

StaticstringToBase64

• stringToBase64(str): string

• Converts a string to base64 encoding.

  Parameters

  • str: string

    The string to encode

  Returns string

  Base64 encoded string

StaticstringToBuffer

• stringToBuffer(src): ArrayBuffer

• Converts a string to an ArrayBuffer using TextEncoder.

  Parameters

  • src: string

    The string to convert

  Returns ArrayBuffer

  ArrayBuffer containing the encoded string data

StatictakeBufferViewAsUint8Array

• takeBufferViewAsUint8Array(json, bufferViewIndex, buffer): Uint8Array

• Extracts a Uint8Array from a buffer view based on JSON specification.

  Parameters

  • json: RnM2

    RnM2 JSON object containing buffer view information
  • bufferViewIndex: number

    Index of the buffer view
  • buffer: ArrayBuffer | Uint8Array

    The source buffer data

  Returns Uint8Array

  Uint8Array view of the specified buffer region

StatictoCRC32

• toCRC32(str): number

• Calculates CRC32 checksum for a given string.

  Parameters

  • str: string

    The string to calculate checksum for

  Returns number

  CRC32 checksum as unsigned 32-bit integer

Staticuint8ArrayToString

• uint8ArrayToString(uint8Array): string

• Converts a Uint8Array to a string using TextDecoder when available.

  Parameters

  • uint8Array: Uint8Array

    The Uint8Array to convert

  Returns string

  String representation of the array data

Staticuint8ArrayToStringInner

• uint8ArrayToStringInner(uint8): string

• Internal method to convert Uint8Array to string without TextDecoder.

  Parameters

  • uint8: Uint8Array

    The Uint8Array to convert

  Returns string

  String representation of the array data