Shared, per-write-call state passed to writeNode -- same rationale as GltfReadContext.
Deliberately has no doc field: writeNode runs per-node during the recursive tree walk,
before the document itself has been assembled -- only state (for accumulating root-level
data, e.g. KHR_lights_punctual's lights[]) is available at that point.
Shared, per-write-call state passed to
writeNode-- same rationale asGltfReadContext. Deliberately has nodocfield:writeNoderuns per-node during the recursive tree walk, before the document itself has been assembled -- onlystate(for accumulating root-level data, e.g.KHR_lights_punctual'slights[]) is available at that point.