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Chris Tsang
ef9496f792
A new pipeline slot between curve fitting and composition: CurvePasses rewrite each fitted contour, so mosaic mode transforms every shared boundary segment exactly once and the tessellation stays seam-free by construction. SimplifyCurves re-fits each smooth run between corners with the fewest cubics within the tolerance (Schneider's algorithm via a current flo_curves — visioncortex's copy is pinned to an old one and block-splits at 200 points), with tangents from the chain's own ends, corners kept in place, junction endpoints pinned bit-for-bit, and rings seamed at their sharpest junction. Off by default; polylines pass through untouched. Cityscape at tolerance 1: 229 -> 138 KB stacked, 103 -> 36 KB watershed cutout, with render diffs under golden noise. CurveFitter now returns Vec<FittedGeom> (promoted from mosaic::fit) so stacked contours flow through the same pass machinery; the optimizer's SimplifyPass is renamed CleanupPass to free the word.