maj00r 9b596e7ffa feat(editor): reverse curves laid through points in the mode of a curve: points clicked along an S, with a straight between its curves or none, gave "No curve follows the points clicked along it", and a curve to and fro of three was laid as one curve running metres off the points. A stretch traced is fitted as a chain of two to four curves too: the points split where the curvature they show changes its side, a curve for each part, the lines between them, the common tangents of a reverse curve, fitted with the radii and the transitions from the tangents at the points of inflection. Two curves turning the other way may meet with no straight between them, their transitions meeting at the inflection, or their arcs; the radii which fill the room between their vertices are kept as they were laid, a hair under, so the design gives no warning of radii made smaller. Two turning the same way stay one compound curve unless a straight of shortest_between parts them. A unit test traces eight such lines, clicked exactly and 5 cm off, with other radii and the ends not parallel, and finds the radii within 3 %

2026-10-26 18:23:04 +01:00

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