Enum MetaMode 

pub enum MetaMode {
    StreamingPartial {
        scanned_through: usize,
    },
    SmallFileSingle,
}

Which RTC-detection ladder resolve_stream_meta should run.

Variants

StreamingPartial

Streaming early-meta: the caller’s decoder sees only a PARTIAL entity index (the file head scanned so far), so RTC detection runs the 3-stage fallback ladder — partial-index detect → full-index re-detect (triggered when no large offset was found AND either the IfcSite has not been scanned yet OR the partial index resolved no usable placement chain) → placement-bounds last resort — instead of silently defaulting to no-shift and rendering f32 vertex jitter on models whose world offset lives in late spatial placements.

scanned_through is how far into content the caller’s index reaches, as a byte offset at a record boundary. Stage 1 samples only that head, because nothing past it can resolve a placement chain against a partial index: sampling the whole file there would decode every entity in the tail, have all of them abstain, and add a full-file walk (measured 235 ms on a 343 MB fixture; 7 of 7 fixtures walked to EOF and none of them contributed a sample) to the mid-scan emission that exists to keep time-to-first-geometry short.

Fields

scanned_through: usize

SmallFileSingle

The caller’s decoder already sees the FULL entity index (the small-file streaming tail, or the single-pass buildPrePassOnce), so a single GeometryRouter::detect_rtc_offset_for_file is correct.

Trait Implementations

impl Clone for MetaMode

fn clone(&self) -> MetaMode

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for MetaMode

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl PartialEq for MetaMode

fn eq(&self, other: &MetaMode) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for MetaMode

impl Eq for MetaMode

impl StructuralPartialEq for MetaMode