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harrierpigeon
3beb448ae6
With a first layer of about 0.28 mm or more at 45 degrees (or a shallower belt) the brim band is wider than one bead and its lines go on the nominal lattice. A lattice line could land where the belt is almost at the band's print_z; its flow was clamped to half a layer while the nozzle sat nearly on the belt. Such a line now moves uphill to the 0.75 fraction the single-line case uses, and a line that lands on the previous one is skipped. Ported from the Unlayered fork (patch 0007 of its belt port series, found there by fuzzing first layer heights). The fork's companion fix, restricting the brim filament to those the writer was handed (0008), is not needed here: ToolOrdering registers the brim filament on every band's layer, so the writer always has it. A test pins that with every object a flush target.
OrcaSlicer tests
Building, running and writing tests is documented on the wiki, under How to Test.
Two files here rather than there, because coding agents only read what is in the repository: