Struct StepContext 

pub struct StepContext<'a> {
    pub iteration: usize,
    pub frame_index: Option<usize>,
    pub batch_index: Option<usize>,
    pub state: &'a ReconstructionState,
    pub diagnostics: &'a Diagnostics,
    pub trace: &'a ReconstructionTrace,
    pub current_algorithm_metrics: &'a [AlgorithmMetricRecord],
    pub model: &'a ImagePlaneModel,
    pub problem_name: Option<&'a str>,
}

Borrowed reconstruction snapshot supplied to non-finish callback hooks.

Fields

iteration: usize

One-based current iteration, or zero at the start hook.

frame_index: Option<usize>

Current zero-based acquisition-frame index at frame-end hooks.

batch_index: Option<usize>

Current zero-based batch index at frame-end hooks.

state: &'a ReconstructionState

Current mutable-run state exposed immutably to callbacks.

diagnostics: &'a Diagnostics

Diagnostics computed because active callbacks requested them.

trace: &'a ReconstructionTrace

Trace of iterations completed before or at this hook.

current_algorithm_metrics: &'a [AlgorithmMetricRecord]

Algorithm-specific scalar metrics emitted for the current completed iteration.

model: &'a ImagePlaneModel

Compiled image-plane model used by the run.

problem_name: Option<&'a str>

Optional user-facing reconstruction-problem name.