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Circle suggestion #1406

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77a5450
Fixed mid+base east/west anchors for circle
hammondkd Aug 22, 2025
2e75642
Moved mid+base east/west anchors onto anchor border for ellipse
hammondkd Aug 22, 2025
20f5300
Updated changelog
hammondkd Aug 22, 2025
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2 changes: 2 additions & 0 deletions doc/generic/pgf/CHANGELOG.md
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Original file line number Diff line number Diff line change
Expand Up @@ -9,6 +9,8 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
### Fixed

- Fix formatting of `default XXX, initially XXX` in key docs #1278
- Moved `base west`, `base east`, `mid west`, and `mid east` anchors
onto the edge of the shape for `circle` and `ellipse` shapes

## [3.1.11] - 2025-08-14 Henri Menke

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40 changes: 28 additions & 12 deletions tex/generic/pgf/libraries/shapes/pgflibraryshapes.geometric.code.tex
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Original file line number Diff line number Diff line change
Expand Up @@ -91,18 +91,26 @@
\anchor{mid west}
{%
\pgf@process{\radius}
\pgf@xa=\pgf@x%
\pgf@xa=\pgf@x
\pgf@ya=\pgf@y
\pgf@process{\centerpoint}
\advance\pgf@x by-\pgf@xa%
\pgfmathsetlength\pgf@y{.5ex}
\pgf@xc=\pgf@x
\pgf@yc=\pgf@y
\pgfmathsetlength\pgf@y{0.5ex}%
\pgfmathsetlength\pgf@x{\pgf@xc
- \pgf@xa*cos(asin((\pgf@y-\pgf@yc)/\pgf@ya))}
}%
\anchor{base west}
{%
\pgf@process{\radius}
\pgf@xa=\pgf@x%
\pgf@xa=\pgf@x
\pgf@ya=\pgf@y
\pgf@process{\centerpoint}
\advance\pgf@x by-\pgf@xa%
\pgf@y=0pt
\pgf@xc=\pgf@x
\pgf@yc=\pgf@y
\pgf@y=0pt%
\pgfmathsetlength\pgf@x{\pgf@xc
- \pgf@xa*cos(asin((\pgf@y-\pgf@yc)/\pgf@ya))}
}%
\anchor{north west}
{
Expand Down Expand Up @@ -132,18 +140,26 @@
\anchor{mid east}
{%
\pgf@process{\radius}
\pgf@xa=\pgf@x%
\pgf@xa=\pgf@x
\pgf@ya=\pgf@y
\pgf@process{\centerpoint}
\advance\pgf@x by\pgf@xa%
\pgfmathsetlength\pgf@y{.5ex}
\pgf@xc=\pgf@x
\pgf@yc=\pgf@y
\pgfmathsetlength\pgf@y{0.5ex}%
\pgfmathsetlength\pgf@x{\pgf@xc
+ \pgf@xa*cos(asin((\pgf@y-\pgf@yc)/\pgf@ya))}
}%
\anchor{base east}
{%
\pgf@process{\radius}
\pgf@xa=\pgf@x%
\pgf@xa=\pgf@x
\pgf@ya=\pgf@y
\pgf@process{\centerpoint}
\advance\pgf@x by\pgf@xa%
\pgf@y=0pt
\pgf@xc=\pgf@x
\pgf@yc=\pgf@y
\pgf@y=0pt%
\pgfmathsetlength\pgf@x{\pgf@xc
+ \pgf@xa*cos(asin(-(\pgf@y-\pgf@yc)/\pgf@ya))}
}%
\anchor{north east}
{
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32 changes: 28 additions & 4 deletions tex/generic/pgf/modules/pgfmoduleshapes.code.tex
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Original file line number Diff line number Diff line change
Expand Up @@ -1267,10 +1267,34 @@
\anchor{south}{\centerpoint\advance\pgf@y by-\radius}%
\anchor{west}{\centerpoint\advance\pgf@x by-\radius}%
\anchor{east}{\centerpoint\advance\pgf@x by\radius}%
\anchor{mid west}{\centerpoint\advance\pgf@x by-\radius\pgfmathsetlength\pgf@y{.5ex}}%
\anchor{mid east}{\centerpoint\advance\pgf@x by\radius\pgfmathsetlength\pgf@y{.5ex}}%
\anchor{base west}{\centerpoint\advance\pgf@x by-\radius\pgf@y=0pt}%
\anchor{base east}{\centerpoint\advance\pgf@x by\radius\pgf@y=0pt}%
\anchor{mid west}{\centerpoint
\pgf@xc=\pgf@x
\pgf@yc=\pgf@y
\pgfmathsetlength\pgf@y{0.5ex}%
\pgfmathsetlength\pgf@x{\pgf@xc
- \radius*cos(asin((\pgf@y-\pgf@yc)/\radius))}%
}%
\anchor{mid east}{\centerpoint
\pgf@xc=\pgf@x
\pgf@yc=\pgf@y
\pgfmathsetlength\pgf@y{0.5ex}%
\pgfmathsetlength\pgf@x{\pgf@xc
+ \radius*cos(asin((\pgf@y-\pgf@yc)/\radius))}%
}%
\anchor{base west}{%
\centerpoint
\pgf@xc=\pgf@x
\pgf@yc=\pgf@y
\pgf@y=0pt%
\pgfmathsetlength\pgf@x{\pgf@xc - \radius*cos(asin(-\pgf@yc/\radius))}%
}%
\anchor{base east}{%
\centerpoint
\pgf@xc=\pgf@x
\pgf@yc=\pgf@y
\pgf@y=0pt%
\pgfmathsetlength\pgf@x{\pgf@xc + \radius*cos(asin(-\pgf@yc/\radius))}%
}%
\anchor{north west}{
\centerpoint
\pgf@xa=\radius
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