CTAN update: pgf

[CTAN Announcements]

Henri Menke submitted an update to the

                pgf

package.

Version number: 3.1.5
License type: lppl1.3c gpl2 fdl

Summary description: Create PostScript and PDF graphics in TeX

Announcement text:
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# BREAKING CHANGES

- The computation of path times in the `intersection` library was wrong 
when sorting intersections and did therefore not work correctly (#480).  
This is fixed now, but that also means that the order of intersections 
might change if you were using sorting before.  You can easily check this 
by looking for `\pgfintersectionsortbyfirstpath` and 
`\pgfintersectionsortbyfirstpath` or the `sort by` key if you are using 
intersections in Ti*k*Z.

- It turned out that in `\pgf at protocolsizes` the `\pgf at path@size at hook` was 
executed only if the picture was actually to be placed. This led to the 
problem that the `local bounding box` was not updated correctly (#795).  
To correct this, the hook is now executed unconditionally.

- To get name prefixes for `pic` working (#311) the resolution of node 
names in `\tikz at calc@anchor` now has two stages.  First it tries to look 
up the prefixed name and uses it if it exists.  If there is no prefixed 
name, the global name without prefix will be looked up and used (fixes 
#717).  Previously, if the prefixed name did not exist and error was 
issued immediately without attempting to look up the global name.

- There was a bug in old PGF versions that the body of `\pgfkeysedef` was 
not fully expanded #305.  This was fixed in PGF 3.1 (ac33f7e5) by the use 
of `\scantokens`.  Unfortunately when expanding the body the catcodes at 
the point of use are taken instead of the catcodes at the point of 
definition.  This led to new bugs like #669.  With the new version we are 
taking a middle ground. We support macro definitions within edef bodies by 
doubling all the hashes followed by numbers.  All other hashes have to be 
escaped manually.  We assume that this is not a common use case.

# New features

You can read about these new features in the manual:

- The `patterns.meta` library now provides a couple of predefined patterns 
which can be used as replacements for the ones provided by the `patterns` 
library.

- Tight bounding boxes for Bezier curves using the `bbox` library.  This 
feature was contributed by @tallmarmot.  Thanks!

- New pgfkeys handler `.evaluated`

- The RGB color model is now supported in Plain TeX, i.e. values can be 
integers 0-255 instead of floats 0-1 for rgb.

- Annotations for code examples in the manual as to which libraries are 
required.  These were contributed by Stefan Pinnow (@Mo-Gul).  Thanks!

- GitHub issue templates for more streamlined bug reporting.

- New build system based on Lua.  We'd like to have a more cross-platform 
build system.  The old system was based on Makefiles, which will be 
retained for a while but gradually phased out.  In the future we hope to 
be able to implement a regression test suite.

# Removed features

- In the last release the undocumented commands `\rawx`, `\rawy`, `\rawz`, 
and `\coord` were added to the `\path let` operation. These proved to be 
not as useful as anticipated (#731) and were therefore removed again.

# Bug fixes

Lots of bug fixes.  On GitHub you can click the commit hashes and the 
issue numbers to get to the fix and the ticket, respectively.

0b095288 #793
ba8628c8 #804
c6ef774c #305 #669
135e361e #759
be8dfa7e #769
26cea424 #805 #806
f63131b4 #801
4204b35b #803
167a78eb #798
8445f362 #796
03b89120 #795
acd2ca38 #480
d2caaf3a #387
a5989c1e #442
9d4e1020 #428
96f41c41 #730
b2bbefda #775 #776
d9e677f5 #400
94be30ee #788
a632c4d0 #790
41a85559 #789
319cae01 #512
969b1f8d #726
888f902c #785
226808c3 #784
13dab67d #736
92faccff #643 #773 #774
3c909b77 #770
6ccafffa #519 #751
3cf72768 #627
37c39d0e #602
a547358e #727
97a18d33 #767
2e11f549 #728
f7a24c56 #719
88951be5 #311 #717
08275e30 #747
fddaaad7 #753
a93c47eb #762
88954e20 #768
1302de8a #756
b2656567 #743
47f87253 #742
5e2f4a88 #284
aee5465f #735
4aaa25e6 #736
76a69d29 #640 #711 #729
2d5fb0c3 #720
bb5614ea #718
5c746e52 #715
ff369f8a #721
7ee3a2ca #361


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This package is located at 
   http://mirror.ctan.org/graphics/pgf/base

More information is at
   https://www.ctan.org/pkg/pgf

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   Thanks for the upload.

     For the CTAN Team
    Erik Braun

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