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Drew Dibble
62a01689f0
The boolean that merges crossing contours cost about as much as the rest of a plain extrusion, and it ran on every profile. Most art has no contours that meet, so the profile is now sampled first (its point limit checked there, before any boolean) and resolved only when two edges cross, touch, run along each other or fold back, in one contour or across two. Edges are swept by their left ends, within a pair budget past which the boolean decides. Touching counts: squares sharing an edge inflate as one puff, not two with a seam. On a release build, Extrude of 120 separate contours takes 0.31 ms instead of 4.18 ms; profiles that do cross cost what they did. Tests: the meeting cases, squares sharing an edge, the fallback for a profile the boolean refuses, Inflate's extent and area for the crossing k, and the coincident circles' area. The hairline test now holds a crossing pair so that its profile still goes through the boolean. Docs: the merge is described once for all three effects, linking to a new Limits section in the pathops README instead of repeating its limits, and the point limit notes that a merged outline can have more points.