New on CTAN: tikz-bbox
Precise determination of bounding boxes in TikZ, which should contain not only the curve itself, but also all control points.
The package’s Catalogue entry can be viewed at https://ctan.org/pkg/tikz-bbox The package’s files themselves can be inspected at http://mirror.ctan.org/graphics/pgf/contrib/tikz-bbox/
Thanks for the upload. For the CTAN Team Petra Rübe-Pugliese
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tikz-bbox – Precise determination of bounding boxes in TikZ
The built-in determination of the bounding box in TikZ is not entirely accurate. This is because, for Bezier curves, it is the smallest box that contains all control points, which is in general larger than the box that just contains the curve. This library determines the exact bounding box of the curve.