add_slice()

FormaBuffer::SliceId MayaFlux::Buffers::FormaBuffer::add_slice	(	const std::vector< uint8_t > &	bytes,
		std::optional< Portal::Graphics::PrimitiveTopology >	topology = std::nullopt
	)

Add a block of vertices that shares this buffer with the others.

submit() writes a default block of its own, so a buffer used only through submit() holds one. Blocks share the buffer's topology and are uploaded together; each can be updated, hidden or reordered without touching the rest. Several blocks cost one draw when they are adjacent, visible and in order.

Valid once setup_processors() has run.

Parameters

bytes	Whole interleaved vertices matching the topology; a trailing partial vertex is dropped.
topology	Topology of this block; the buffer's when omitted. A different topology needs setup_rendering with triangulate, which draws mixed blocks as one batch.

Returns

Id of the block, or 0 when the buffer has no processor yet.

Definition at line 178 of file FormaBuffer.cpp.

{
    if (!m_processor) {
        MF_ERROR(Journal::Component::Buffers, Journal::Context::BufferProcessing,
            "FormaBuffer::add_slice called before setup_processors");
        return 0;
    }
    return m_processor->add_slice(bytes, topology);
}

References MayaFlux::Journal::BufferProcessing, MayaFlux::Journal::Buffers, m_processor, MF_ERROR, and topology().

Referenced by MayaFlux::Portal::Forma::FormaTarget::slice_of().

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