seed_from_upstream()

void MayaFlux::Nodes::Network::PhysicsOperator::seed_from_upstream ( const GraphicsOperator *  upstream )

overridevirtual

Seed physics state from upstream operator's vertex data.

Extracts positions, colors, sizes from upstream and initializes physics state (velocity = 0, mass = 1) for each particle. Supports PointVertex input; other vertex types are ignored with a warning.

Parameters

upstream

Upstream operator to seed from

Reimplemented from MayaFlux::Nodes::Network::GraphicsOperator.

Definition at line 98 of file PhysicsOperator.cpp.

{
    if (get_vertex_count() > 0 || !upstream)
        return;
 
    const auto data = upstream->get_vertex_data();
    if (data.empty())
        return;
 
    const size_t count = data.size() / sizeof(PointVertex);
    if (count == 0)
        return;
 
    std::vector<PointVertex> vertices(count);
    std::memcpy(vertices.data(), data.data(), data.size());
    initialize(vertices);
 
    MF_DEBUG(Journal::Component::Nodes, Journal::Context::NodeProcessing,
        "PhysicsOperator seeded {} vertices from upstream '{}'",
        count, upstream->get_type_name());
}

References count, MayaFlux::Nodes::Network::NetworkOperator::get_type_name(), get_vertex_count(), MayaFlux::Nodes::Network::GraphicsOperator::get_vertex_data(), initialize(), MF_DEBUG, MayaFlux::Journal::NodeProcessing, and MayaFlux::Journal::Nodes.

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