seed_state()

void MayaFlux::Buffers::RelaxationGridBuffer::seed_state	(	const void *	data,
		size_t	size
	)

Write initial state directly into the current front generation.

Parameters

data	Pointer to cell_count * cell_stride_bytes of state data.
size	Byte count; must equal get_state_bytes().

Direct host-visible memcpy into back_buffers[front_index()], mirroring VKBuffer::set_data's own host-visible write path. Valid only before the buffer's processing chain has run at least once, or between generations where overwriting the current front state is intended (e.g. a runtime reset). Does not touch the back generation or trigger a swap.

Definition at line 121 of file RelaxationGridBuffer.cpp.

{
    if (size != get_state_bytes()) {
        MF_ERROR(Journal::Component::Buffers, Journal::Context::BufferManagement,
            "seed_state size {} does not match expected {}", size, get_state_bytes());
        return;
    }
 
    auto& resources = get_buffer_resources();
    auto& front = resources.back_buffers[front_index()];
 
    if (!front.mapped_ptr) {
        MF_ERROR(Journal::Component::Buffers, Journal::Context::BufferManagement,
            "seed_state: front generation buffer has no mapped pointer");
        return;
    }
 
    std::memcpy(front.mapped_ptr, data, size);
}

References MayaFlux::Journal::BufferManagement, MayaFlux::Journal::Buffers, front_index(), MayaFlux::Buffers::VKBuffer::get_buffer_resources(), get_state_bytes(), and MF_ERROR.

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