From Newsgroup: comp.text.tex

Alain Matthes submitted an update to the

tkz-elements

package.

Version: 4.20c 2025-09-17
License: lppl1.3c

Summary description: A Lua library for drawing Euclidean geometry with TikZ or tkz-euclide

Announcement text: ----------------------------------------------------------------------

New triangle methods: thebault/c_c (Th|-baultrCOs problem III),
mixtilinear_incircle, three_tangent_circles, morley, soddy,
napoleon, poncelet_point, orthopole; plus orthopole support
for quadrilaterals via helper tkz.orthopole(a,b,c,l).

Improvements: circle (common_tangent, orthogonal_through,
orthogonal_from, c_cc_p), line (distance), and rewritten
triangle methods (symmedian_line, altitude, bisector,
bisector_ext, mediator, ex_circle, reflection).

Docs: new Best practices subsection, additional examples
(Th|-bault III, Poncelet point for triangle/quadrilateral,
orthopole), and assorted fixes.
Backward compatible.

GitHub introduction
Source, roadmap, issues and the full CHANGELOG live on
GitHub: https://github.com/al-ma-dev/tkz-elements.
Feedback and contributions are welcome (see CONTRIBUTING.md).
The PDF manual ships in the repo and on CTAN.

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For the CTAN Team
Petra R|+be-Pugliese

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From Newsgroup: comp.text.tex

Alain Matthes submitted an update to the

tkz-elements

package.

Version: 4.21c 2025-09-21
License: lppl1.3c

Summary description: A Lua library for drawing Euclidean geometry with TikZ or tkz-euclide

Announcement text: ----------------------------------------------------------------------

Docs

Changed the names of the examples.
The examples now use external Lua files.
Corrected the documentation.
Cleaned up the files: unused labels have been removed, as well as overfull box.

----------------------------------------------------------------------

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The packagerCOs files themselves can be inspected at
https://mirrors.ctan.org/macros/latex/contrib/tkz/tkz-elements/

------------------------------------------------------------------------

Thanks for the upload.

For the CTAN Team
Petra R|+be-Pugliese

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From Newsgroup: comp.text.tex

Alain Matthes submitted an update to the

tkz-elements

package.

Version: 4.25c
License: lppl1.3c

Summary description: A Lua library for drawing Euclidean geometry with TikZ or tkz-euclide

Announcement text: ----------------------------------------------------------------------

Added
path: get_point, iter().
tkz-elements.sty: three macros \tkzGetPointFromPath(#1,#2){#3};
\tkzPathCount(#1){#2}; \tkzDrawFromPointToPath.
tkz: Function tkz.parabola(a, b, c) to obtain the quadratic form
whose graph passes through the three points a, b, and c
(under certain conditions).

Changed
Source structure: Removed version numbers and dates from each
tkz_elements_xxx.lua file. The official version and release date
are now maintained only in:
tkz-elements.sty (for LaTeX users), README.md, CHANGELOG.md,
doc/tkz-elements.pdf.
occs: The coordinates method now returns numbers instead of strings
(removed checknumber_).
path: Improved get_number_path method.

Docs
Renamed several examples: the old names were more explicit.
After Overview, added three navigation tables (attributes, methods,
metamethods) for each class. All elements should now be listed,
with links to their definitions and, where relevant, to examples.
Rewrote the section on path.
Added in Theorems: CirclerCoPoint Midpoint Theorem.
Added documentation for the new macros of tkz-elements.sty.
Added in Examples: Construction of the midcircle of two disjoint circles.

----------------------------------------------------------------------

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The packagerCOs files themselves can be inspected at
https://mirrors.ctan.org/macros/latex/contrib/tkz/tkz-elements/

------------------------------------------------------------------------

Thanks for the upload.

For the CTAN Team
Petra R|+be-Pugliese

------------------------------------------------------------------------

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From Newsgroup: comp.text.tex

Alain Matthes submitted an update to the

tkz-elements

package.

Version number: 4.30c 2025-10-04
License type: lppl1.3c

Summary description: A Lua library for drawing Euclidean geometry with TikZ or tkz-euclide

Announcement text: ----------------------------------------------------------------------


[2025/10/04 version 4.30c]

Added

- circle:
- in_disk same as in_out_disk
- on_circle same as in_out
- in_disk_strict
- out_disk_strict
- line
- side_line This method assigns a value of -1, 0, or 1 to a given
point depending on its position in the plane relative to the
line.
- on_line = in_out_line
- on_segment = in_out_segment ### Changed
- circle
- common_tangent Complete rewriting of the procedure, which now
takes into account the position of circles and, above all, adds
an option to choose between external tangents and internal
tangents when they exist.
- c_cc_p Complete rewriting of the procedure. You can use an
rCLexternalrCY or rCLinternalrCY option to determine whether solution
circles exist. The method takes into account the relative
position of the circles.
- line
- c_ll_p(L, p) now has a line and a point as its argument.

Docs

- Correction of typography.
- Adjusting documentation for new methods.
- Rewriting of numerous method presentations.


----------------------------------------------------------------------

This package is located at
https://mirrors.ctan.org/macros/latex/contrib/tkz/tkz-elements

More information is at
https://www.ctan.org/pkg/tkz-elements

------------------------------------------------------------------------

Thanks for the upload.

For the CTAN Team
Erik Braun

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From Newsgroup: comp.text.tex

Alain Matthes submitted an update to the

tkz-elements

package.

Version: 4.35c 2025-11-08
License: lppl1.3c

Summary description: A Lua library for drawing Euclidean geometry with TikZ or tkz-euclide

Announcement text: ----------------------------------------------------------------------

This release introduces major internal improvements, new geometric
tools, and the first public integration of Apollonius-related constructions.
Improved geometric engine.
Numerous internal optimisations and structural clean-up of the Lua codebase.
Better consistency between object interfaces (point, line, circle, path, rCa).
Unified system for solution outputs using paths (path objects storing
centres and through-points).
New or enhanced methods
Robust tests for circle tangency (circle:are_circles_tangents()).
Improved numerical tolerance control (tkz.epsilon, tkz.approx()).
Expanded geometry toolbox: pole of a line w.r.t a circle, inversion-based
utilities, projections, affine transformations.
Apollonius problems rCo experimental implementation
First complete framework for solving classical Apollonius configurations
(CCC, CCL, CLP, LPP, etc.).
Implementations include Vi|?te reduction, homothety and inversion approaches.
Solutions are returned as paths (pa_center, pa_through) with consistent
structure, ready for TikZ drawing.

Important note on Apollonius methods
The methods related to Apollonius' circle problems are still experimental.
Although many generic cases are already handled (disjoint circles,
external/internal tangencies, equal or unequal radii), the following
must be kept in mind:
Some special or degenerate cases are not yet fully covered, e.g.:
three mutually secant circles,
double contact with equal radii and aligned centres,
combinations of internal/external tangency near inversion singularities.
Corner cases may still produce missing or duplicated solutions.
The code is evolving: names, internal strategies, and outputs may slightly
change in future releases.
These additions are intended as a research and development module,
not yet as a final, guaranteed solver for all configurations.
Documentation & usage
The user manual (doc/tkz-elements.pdf) has been updated accordingly.
A dedicated section on Apollonius problems explains:
Syntax, returned paths, modes ("external", "internal", "all"),
Example TikZ figures using tkz-euclide,
Limitations and known edge cases.

----------------------------------------------------------------------

The packagerCOs Catalogue entry can be viewed at
https://ctan.org/pkg/tkz-elements

The packagerCOs files themselves can be inspected at
https://mirrors.ctan.org/macros/latex/contrib/tkz/tkz-elements/

------------------------------------------------------------------------

Thanks for the upload.

For the CTAN Team
Petra R|+be-Pugliese

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From Newsgroup: comp.text.tex

Alain Matthes submitted an update to the

tkz-elements

package.

Version: 4.40c 2025-11-13
License: lppl1.3c

Summary description: A Lua library for drawing Euclidean geometry with TikZ or tkz-euclide

Announcement text: --------------------------------------------------------------------------------

This release introduces several improvements to fundamental geometric objects, expands the numerical utilities in the tkz module, adds new capabilities for conics, and clarifies portions of the documentation.

It continues the consolidation of existing methods while providing new tools for advanced geometric work.
Added
Points: New method length(p)
Allows distance evaluation using z.A:length(z.B), equivalent to tkz.length(z.A, z.B).
Line: Improved methods: orthogonal_at, collinear_at
Both now behave more consistently in proportional constructions. Circle:
New intuitive alias methods:
from_radius rei through
from_diameter rei diameter
Updated common_tangent with more coherent handling of special cases. Triangle:
New method:
trilinear_to_d rCo converts trilinear coordinates into distances to the sides (internally uses HeronrCOs formula).
tkz: A set of highly useful numerical tools has been added:
Generators and unit converters:
tkz.range, tkz.deg, tkz.rad, tkz.pt
Value checking: tkz.is_NaN, tkz.is_Inf, tkz.notDef
Numerical analysis:
tkz.fsolve(f, a, b, n [, opts]) rCo simple root finder
tkz.derivative(f, x0 [, accuracy]) rCo numerical derivative at a point Conic
Added common_tangent for conics (currently implemented for ellipses).

Changed
Conic:
The path method for ellipses has been redesigned:
new modes: "swap", "ccw", "cw"
proper handling of cases where the endpoints are opposite.

Documentation:
Corrected usage of
\tkzDrawCoordinates[smooth] (instead of \tkzDrawCoordinatessmooth) in the conic class.
Added several new examples for CCL.

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This package is located at
https://mirrors.ctan.org/macros/latex/contrib/tkz/tkz-elements

More information is at
https://ctan.org/pkg/tkz-elements


--------------------------------------------------------------------------------

Thanks for the upload.

For the CTAN Team
Manfred Lotz


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From Newsgroup: comp.text.tex

Alain Matthes submitted an update to the

tkz-elements

package.

Version: 4.42c 2025-11-24
License: lppl1.3c

Summary description: A Lua library for drawing Euclidean geometry with TikZ or tkz-euclide

Announcement text: --------------------------------------------------------------------------------

tkz-elements rCo update 4.42c (2025/11/24)
This update brings a new geometric class, several new Apollonius-related tools, improved robustness thanks to extended EPS handling, and many documentation enhancements.

Added

New class angle:
A dedicated object for angle management (identifier "A" used internally). Integration with other classes will come in later releases.

class circle:
New method CCL (circlerCocirclerColine tangency).
Unified similitude method with optional "internal" / "external" mode.

module tkz:
New angle-related functions, all with optional EPS:
tkz.inner_angle, tkz.angle_between_vectors, tkz.get_angle_normalize.
New comparison helper: tkz.approx (optional EPS).

class line:
Aliases perpendicular_bisector and bisector for mediator.
New method harmonic with mode "internal", "external" or "both".

class triangle:
isodynamic_points (alias neuberg_points).
three_apollonius_circles.
apollonius_circle.
apollonius_points.
apollonius_circles.

Changed

class matrice:
Fixes for print_matrix and matrix:print.
Correction of method htm.
Intersection
Complete rewrite of algorithms with a unified EPS parameter for precision control.

class circle:
Many methods now accept an optional EPS argument:
on_circle, in_out, in_disk, in_out_disk,
in_disk_strict, out_disk_strict, in_out_disk_strict,
line_position, pole, is_tangent, is_secant,
circles_position, orthogonal_through, midcircle, common_tangent.
Improved behaviour of CLL for parallel lines.

class line
Improved LLL.

Documentation:

Some corrections
New Gothic example for CLP.
New CLL example with parallel lines.
Rewrite of search_circle.lua.
Expanded Apollonius section with new CLP examples.
Lua lesson: using string.char(37).

--------------------------------------------------------------------------------

This package is located at
https://mirrors.ctan.org/macros/latex/contrib/tkz/tkz-elements

More information is at
https://ctan.org/pkg/tkz-elements


--------------------------------------------------------------------------------

Thanks for the upload.

For the CTAN Team
Manfred Lotz


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From Newsgroup: comp.text.tex

Alain Matthes submitted an update to the

tkz-elements

package.

Version: 4.44c 2025-12-09
License: lppl1.3c

Summary description: A Lua library for drawing Euclidean geometry with TikZ or tkz-euclide

Announcement text: ----------------------------------------------------------------------

Version 4.44c of tkz-elements brings substantial extensions to
the geometric engine, new analytical tools, and important
improvements to the LuarCoTeX interface.
On the geometric side, the triangle class gains two new constructions
related to the FeuerbachrCoApollonius configuration, including a
dedicated implementation of Kimberling point n-#181.
The circle class benefits from an enhanced CCC method, now able
to handle a broader range of special tangency cases reliably.

The vector class has been significantly extended: it now provides
the components dx and dy, together with a full set of analytical
methods (dot, cross, is_parallel, is_orthogonal, angle_to, rotate,
etc.), offering a more complete and consistent framework for
vector-based computations inside Lua.

At the system level, new global constants have been introduced
to control TeX dimension limits (tkz.maxdimen_pt, tkz.max_coord_cm,
tkz.max_coord_safe). These values are used to reinforce the safety
of coordinate transfer between Lua and TikZ.
The macro \tkzGetNodes has been updated accordingly: only point
names ending in p or pp are transformed, and coordinates exceeding
the safe range are automatically replaced by (0,0) with a warning
written to the log file.

Finally, the documentation has been revised with restored overview
and contents sections, an expanded description of the vector class,
and corrections to the example on Soddy circles.

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https://mirrors.ctan.org/macros/latex/contrib/tkz/tkz-elements/

------------------------------------------------------------------------

Thanks for the upload.

For the CTAN Team
Petra R|+be-Pugliese

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