Initialize per-chunk progress tracking — init_progress

Prepare progress-tracking metadata for a given chunk of vertices. When verbose = TRUE, prints a message indicating which chunk is being processed and returns markers for 25\ that chunk.

Usage

init_progress_tracker(chunk, chunk_seq, verbose)

Arguments

chunk: Integer vector of vertex indices for the current chunk. Expected to be an element of chunk_seq created by make_chunk_sequence.
chunk_seq: Full list of chunks (as returned by make_chunk_sequence), used to compute the total number of chunks.
verbose: Logical; if TRUE, prints progress messages.

Value

If verbose = TRUE, a list with elements:

chunk_idx_str: character label of the form "<i>/<n_chunks>".
milestone_markers: named list of integer vertex indices at 25\

If verbose = FALSE, returns NULL invisibly.

Author

Serena Defina, 2026.