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[scpml] share face construction between grid builders

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Delegate uniform-grid PML faces to stretch_with_scpml, using physical-thickness scaling and electric-center/magnetic-edge samples. Cover disabled axes, touching faces, real profiles, and final stretch caps.

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Forgejo Actions 2026-10-18 23:09:02 -07:00
commit 553cdf948c
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@ -27,3 +27,10 @@ stretching can produce above-light-line PML artifacts. The cap is not a general
spectral guarantee, and weaker absorption can increase boundary reflections.
Check domain size, PML thickness, strength, mode localization, and residuals.
The general scattering profile remains uncapped by default.
`uniform_grid_scpml` builds unit widths by applying `stretch_with_scpml` to
both faces of each enabled axis. Both builders divide imaginary grading by
physical layer thickness and sample electric widths at cell centers and
magnetic widths at cell edges. This corrects the uniform builder's previous
thickness-independent strength and reversed E/H sample offsets; retune existing
uniform-builder profiles using domain/PML convergence checks.