ensure_cluster_binding()

bool MayaFlux::Buffers::VertexFieldProcessor::ensure_cluster_binding ( )

private

Ensure the backing hash_cluster_id state field exists, when m_needs_cluster_id is true.

Returns

False when cluster scoping is needed but the attached buffer is not a NetworkGeometryBuffer, or NetworkGeometryBuffer:: ensure_cluster_ids() itself fails (no primary GraphicsOperator, or it reports zero points). True when m_needs_cluster_id is false: nothing to do.

Delegates the actual declare/derive/upload to NetworkGeometryBuffer::ensure_cluster_ids(), which is itself has_state-guarded, so calling this again after a revision rebuild is cheap and whichever caller (this processor, or NetworkGeometryBuffer's own hash wiring) reaches it first does the real work.

Definition at line 222 of file VertexFieldProcessor.cpp.

{
    if (!m_needs_cluster_id) {
        return true;
    }
 
    if (!m_network_buffer) {
        MF_ERROR(Journal::Component::Buffers, Journal::Context::BufferProcessing,
            "VertexFieldProcessor: operator has a cluster-scoped binding but the "
            "attached buffer is not a NetworkGeometryBuffer, so hash_cluster_id "
            "has nowhere to live. Dispatch suppressed.");
        return false;
    }
 
    if (!m_network_buffer->ensure_cluster_ids()) {
        MF_ERROR(Journal::Component::Buffers, Journal::Context::BufferProcessing,
            "VertexFieldProcessor: operator has a cluster-scoped binding but "
            "hash_cluster_id could not be derived (no primary GraphicsOperator, "
            "or it reports zero points). Dispatch suppressed.");
        return false;
    }
 
    return true;
}

References MayaFlux::Journal::BufferProcessing, MayaFlux::Journal::Buffers, m_needs_cluster_id, m_network_buffer, and MF_ERROR.

Referenced by on_attach(), and sync_revision().

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