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David MannandClaude Opus 5.5
bf80e2d2fa
#5176 made ±100% move the edge by max(radius, feather, 2σ smooth), at least 1 px. Measured in the reference application (a 100 px square, Radius/Feather/Smooth each varied, Shift Edge -100/-50/+100): - A hard selection does not move at all, at any Shift Edge. - On a feathered edge the result is a fixed per-pixel curve, the same at 2, 5 and 10 px feather: the pixel's odds a/(1-a) are multiplied by 49^(shift/100). At -100% a 50% pixel becomes 2%, at -50% 1/8, at +100% 98%. The fit holds within ±0.05 in log-odds on every sample. So Shift Edge is now that curve, applied last as before. It needs no neighbours, so the morphology callback and the halo/spread it added are gone, with the ignored benchmark that timed it (matting::morph itself stays for Select › Modify and the mask view). Tests: a hard edge is unchanged at ±50/±100%; seven measured before→after coverage pairs; a feathered edge is pulled in; the engine refine tests now check the hard edge stays and a feathered one moves. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>