CTAN Comprehensive TeX Archive Network

CTAN update: l3kernel

Date: February 22, 2018 9:43:09 PM CET
The LaTeX Team submitted an update to the l3kernel package. Version number: 2018-02-21 License type: lppl1.3c Summary description: LaTeX3 programming conventions Announcement text:
# Release 2017-02-21 This release features two new *experimental* modules, l3color and l3draw, along with a small number of features to support this new material ## l3color This new *experimental* code provides basic user interfaces for setting the color of material in documents. The input form is based on that in the popular xcolor package, for example \color_select:n { red!30!blue } Some features for supporting spot colors are also included: this area is particularly complex and feedback on all aspects is very welcome. ## l3draw This new module provides a code-level approach to creating graphical material. The approach take is *heavily* inspired by the pgf package: the vast majority of interfaces are compatible with the equivalent \pgf... commands. At present, the coverage of l3draw is significantly smaller than that in pgf, but at the same time it is now capable of creating basic graphics. Supported concepts are - Calculation of points - Path construction, including a variety of geometric shapes - Path insertion with stroking, filling and clipping - Color (fill/stroke/both) - see also l3color All mathematical operations are carried out by the LaTeX3 FPU, rather than using dimensions. As such, the accuracy and range of the values is significantly extended compared with pgf. Point calculations are also expandable, with the *internal* handling of this area very different from pgf. The team anticipate covering the bulk of pgf-like functionality over coming months. ## Additions to expl3 The FPU now supports tuples, for example \fp_eval:n { (1,2) + (3, 4) } \fp_eval:n { sqrt(2) * (1,1) } to allow work with co-ordinate pairs. Step functions have been added for dim variables, e.g. \dim_step_inline:nnnn.
This package is located at http://mirror.ctan.org/macros/latex/contrib/l3kernel More information is at http://www.ctan.org/pkg/l3kernel We are supported by the TeX User Groups. Please join a users group; see http://www.tug.org/usergroups.html .
Thanks for the upload. For the CTAN Team Ina Dau

l3kernel – 3 programming conventions

The l3kernel bundle provides an implementation of the 3 programmers’ interface, as a set of packages that run under . The interface provides the foundation on which the 3 kernel and other future code are built: it is an API for programmers. The packages are set up so that the 3 conventions can be used with regular packages.

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