@pmndrs/bvh
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    Interface NodeFrame

    One axis of a frame: the grid's origin and step, and the step's exponent.

    interface NodeFrame {
        exponent: readonly [number, number, number];
        origin: readonly [number, number, number];
        step: readonly [number, number, number];
    }
    Index
    exponent: readonly [number, number, number]

    log2(step[axis]).

    origin: readonly [number, number, number]

    origin[axis], an exact f32, a multiple of step[axis].

    step: readonly [number, number, number]

    step[axis], a power of two.