Function driven

pub fn driven<'a>(
    e: &'a Effect,
    graph: &NodeGraph,
    id: u64,
    vals: &HashMap<u64, f64>,
) -> Cow<'a, Effect>

An effect node’s parameter ports: a value node wired to port i + 1 computes parameter i for this frame, which is the graph’s only way to drive a knob. Untouched effects are not cloned.