Re: Current state of Apache Commons Math and Geometry

Here are more informations :

First as I said I am (one of the) PMC of Apache SIS, but not only, also 
of GeotoolKit and Examind-SDK.
So I won't have the time to manage another project, if that's what you 
are hoping :).

The Math code is here (most of it) :
https://github.com/apache/sis/tree/geoapi-4.0/incubator/src/org.apache.sis.geometry/main/org/apache/sis/geometries/math
To make it short it has : Tuple, Vector, Matrix, Quaternion, Array, ArrayND.
Nothing fancy but we still made those, more modern, typed, metadata and 
aiming at being compatible with :
- Large arrays (using Panama foreign memory)
- Vector API (https://openjdk.org/jeps/426)
- GPGPU / Babylon / HAT (https://www.youtube.com/watch?v=qkr3E27XYbY)
to achieve somekind of Numpy++++ API.

The Geometry part :
https://github.com/apache/sis/tree/geoapi-4.0/incubator/src/org.apache.sis.geometry/main/org/apache/sis/geometries

Apache-commons-geometry contains a single kind of geometry : 
Constructive Solid Geometry. which is really nice.
But what we are making is more like JavaTopologySuite, Esri-geometry, 
SVG but with 3D (and more) support for PLY, GLTF, GPU...
More details here : 
https://github.com/apache/sis/blob/geoapi-4.0/incubator/src/org.apache.sis.geometry/main/org/apache/sis/geometries/package-info.java

Your thoughts ?

Johann


Le 19/02/2026 à 04:35, Matt Juntunen a écrit :
> Hello,
>
> I did the 1.0.0 release of commons-geometry and some of the additional,
> unreleased functionality shortly afterward. My personal life changed quite
> a bit a few years ago and I haven't had the time or energy to keep pushing
> on it. I'd be happy to discuss the current functionality and see if any of
> it fits with what you're working on.
>
> Regards,
> Matt J
>
> On Wed, Feb 18, 2026 at 9:11 PM Gilles Sadowski <[email protected]>
> wrote:
>
>> Hi.
>>
>> Le mer. 18 févr. 2026 à 22:57, Johann Sorel via dev
>> <[email protected]> a écrit :
>>> Hello,
>>>
>>> I am Johann Sorel, working on the Apache SIS (Spatial Information
>>> System) project.
>>>
>>> In the project we have growing needs for advanced math, array, geometry,
>>> scene capabilities.
>>> Since we did not find what we need in other projects, we are developing
>>> them.
>>>
>>> The logical action would be to have those in the appropriate Apache
>>> project, such as Apache commons Math and Geometry.
>>> But those look abandoned.
>> Neither "Commons Math" nor "Commons Geometry" are abandoned.
>> The latter was spun off from the former, with enhanced performance
>> and new features.
>>
>>> - commons-math3 latest is from 2016
>> The 3.x line is not supported anymore.
>>
>>> - commons-math4 beta is from 2022
>> Math v3.x (and earlier) was monolithic (and became bloated).
>> Version 4 aimed at modularization, while several components
>> were spun off (with improved design and for better maintenance):
>>   * Commons Geometry
>>   * Commons RNG
>>   * Commons Numbers
>>   * Commons Statistics
>>
>> The overhaul of the remaining "legacy" packages of "Math" is
>> work-in-progress, but has stalled...
>>
>>> - commons-geometry1 is from 2021
>> It has been stable since then.
>>
>>> Are those replaced ?
>> No.
>>
>>> have they been merged in another project ?
>> No.
>>
>> You are welcome to revive development. :-)
>>
>> Regards,
>> Gilles
>>
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