NARU API
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    Interface CompiledTargetChunk

    interface CompiledTargetChunk {
        buffer: number;
        byteLength: number;
        byteOffset: number;
        id: string;
        maxDeviationMeters?: number;
        meshIndexes: readonly number[];
        occurrenceCount: number;
        priority: number;
        prototypeId: string;
        prototypeIds: readonly string[];
    }
    Index
    buffer: number
    byteLength: number
    byteOffset: number
    id: string
    maxDeviationMeters?: number

    The deviation this chunk's geometry stays within (ADR-0025).

    Present on every reduced chunk and on no target chunk: the exact level has no error to declare. Where a byte budget coalesced several prototypes into one chunk this is the largest of their measured deviations, because a chunk is the finest thing a viewer can fetch.

    meshIndexes: readonly number[]
    occurrenceCount: number
    priority: number
    prototypeId: string

    Use prototypeIds; retained for the prototype-range-v1 contract.

    prototypeIds: readonly string[]

    All prototypes represented by this request. Legacy chunks contain one.