Switch to a segment splitting approach #16
Merged
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Major changes to switch the way paths are extended to have the same length. Previously, points were duplicated based on which point in the destination line had the closest X value. This was good for extending lines (see #15), but suffered with d3-area (#11), graticules (#13), and curved lines (#10). This new approach uses de Casteljau's algorithm to split bezier curves, allowing for smooth interpolation.