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harrierpigeonandClaude Opus 5.5
c59eb1bcf9
The leading-edge-only brim is the outer brim cut down to the part's first contact with the belt. The cut was taken at the first layer with geometry, but with an overhang on the leading side that layer is the overhang's tip, which is sliced before the part reaches the belt and does not touch it. The cut then lay ahead of the part: a 30 mm fin left a sliver of brim well ahead of a 20 mm cube, and a 40 mm fin, or a leading brim length of 0, left none at all. The footprint loop already finds the layers that touch the belt (their contact band is not empty); record the first of them and cut there. The new test slices a cube with and without a 30 or 40 mm fin over its leading end and checks that the leading-edge brim is the same. It fails without the fix. Reported by raistlin7447 in the review of #14394. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>