write()

bool MayaFlux::IO::SpatialCache::write	(	const std::string &	stream_name,
		const SpatialSample &	sample
	)

Append one sample to a named stream.

Creates the stream's underlying Alembic object on first call for this stream_name (applying any tags queued by write_metadata) and declares each attribute's OGeomParam at that point. Subsequent calls for the same stream_name must keep passing the same topology and the same attributes (same names, types, scopes, same order): declaration is one-time, only values change per sample.

Parameters

stream_name	Name this stream is written under.
sample	This sample's data. See SpatialSample's own doc for which fields apply to which topology.

Returns

True on success. On failure call get_last_error().

Definition at line 335 of file SpatialCache.cpp.

{
    std::lock_guard lock(m_impl->mutex);
 
    if (!m_impl->archive) {
        set_error("write: archive not open");
        return false;
    }
    if (sample.positions.empty()) {
        set_error("write: no positions");
        return false;
    }
 
    if (uses_curve_schema(sample.topology)) {
        if (!sample.ids.empty() || !sample.velocities.empty()) {
            set_error("write: ids/velocities must be empty for a curve topology");
            return false;
        }
        if (sample.vertex_counts_per_curve.empty()) {
            set_error("write: vertex_counts_per_curve is required for a curve topology");
            return false;
        }
        return write_curves_sample(stream_name, sample);
    }
 
    if (sample.topology == PrimitiveTopology::POINT_LIST) {
        if (!sample.vertex_counts_per_curve.empty()) {
            set_error("write: vertex_counts_per_curve must be empty for POINT_LIST");
            return false;
        }
        return write_vertex_sample(stream_name, sample);
    }
 
    set_error("write: unsupported topology; SpatialCache only writes "
              "POINT_LIST, LINE_LIST, LINE_STRIP");
    MF_ERROR(Journal::Component::IO, Journal::Context::FileIO, "{}", get_last_error());
    return false;
}

References MayaFlux::Journal::FileIO, get_last_error(), MayaFlux::IO::SpatialSample::ids, MayaFlux::Journal::IO, m_impl, MF_ERROR, MayaFlux::IO::SpatialSample::positions, set_error(), MayaFlux::IO::SpatialSample::topology, MayaFlux::IO::SpatialSample::velocities, MayaFlux::IO::SpatialSample::vertex_counts_per_curve, write_curves_sample(), and write_vertex_sample().

Referenced by MayaFlux::IO::write_operator_sample().

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