Skip to main content

report_scale_migration

brep_kernel

Function report_scale_migration 

Source 
pub fn report_scale_migration(
    site: &str,
    model_form: f64,
    origin_form: impl FnOnce() -> f64,
)
Expand description

Migration diagnostic for the one-model_scale change (docs/developer/kernel-plans/offset-unification-audit.md, slice 0).

Switching a pipeline’s scale definition moves EVERY tolerance derived from it at once, so the corpus must be measurable before and after. Call this at a site that is changing over, with the old origin-distance value and the new size-based one, and run the batteries with BREP_SCALE_DIAG=1 to see which fixtures actually move and by how much. ratio > 1 means the old definition was LOOSER than the new one there (the placement-inflation this slice removes); ratio < 1 means it was tighter.

Silent and free unless the variable is set: the lookup happens once and the superseded origin_form closure is never called otherwise, so the retired definition costs nothing in the shipped path while staying re-measurable.