Struct ModulatorVector 

pub struct ModulatorVector {
    pub dopamine: f32,
    pub serotonin: f32,
    pub acetylcholine: f32,
    pub norepinephrine: f32,
}

A vector of neuromodulator concentrations.

Critics populate these fields from an Environment observation (and, for temporal critics, from internal state). Consumers typically feed the values into synaptic plasticity rules, attention gating, or other neuromodulatory pathways.

Field ranges depend on which critic produced the vector; see each field’s documentation and the critic-level docs for exact mappings. Vectors from try_assess are finite and inside those ranges; assess may yield NaN when given non-finite observations (IEEE passthrough).

Fields

dopamine: f32

Dopamine — shaped reward / objective-delta drive.

Semantic role: a bounded scalar that downstream plasticity can use to reinforce or weaken recent activity. TDCritic produces a signed value from an EMA of objective deltas, not from a learned prediction-error network.

Ranges by critic:

• SimpleCritic: clamped to [0.0, 1.0] (non-negative objective mapped through; negative objective → 0.0).
• TDCritic: signed, clamped to [-1.0, 1.0] after an EMA of the temporal-difference error is passed through tanh.

serotonin: f32

Serotonin — risk / volatility.

Semantic role: tracks environmental uncertainty or risk load. Both critics read this from Environment::volatility and clamp it to [0.0, 1.0].

acetylcholine: f32

Acetylcholine — focus / surprise.

Semantic role: elevates attention or learning rate when the world is novel or outcomes are unexpected.

Ranges by critic (both clamp to [0.0, 1.0]):

• SimpleCritic: taken from Environment::surprise.
• TDCritic: derived as abs(td_error).tanh(), independent of Environment::surprise.

norepinephrine: f32

Norepinephrine — stress / instability.

Semantic role: reflects system pressure (error rates, thermal load, latency spikes, etc.). Both critics map Environment::stress into this field and clamp it to [0.0, 1.0].

Trait Implementations

impl Clone for ModulatorVector

fn clone(&self) -> ModulatorVector

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for ModulatorVector

impl Debug for ModulatorVector

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for ModulatorVector

fn default() -> ModulatorVector

Returns the “default value” for a type.

impl PartialEq for ModulatorVector

fn eq(&self, other: &ModulatorVector) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for ModulatorVector