[x3d-public] Linear programming

[John Carlson]

Others have good suggestions.  I suggest looking at the SFMatrix field
types for any linear algebra transformations, either in SAI or and SAI
package.  I haven’t looked, preferring to develop my own, mostly alpha code
for converting X3D JSON to STL.

I think linear programming is out of scope for X3D. Maybe look at FX3D,
FVRML or a Wolfram product.

I’m not aware of packages which “reduce complexity” of X3D, but you can
borrow my JSON to STL and matrix JavaScript, just be aware that it’s not
fully tested.  Tools like X3DOM and X_ITE might have full matrix libraries,
because they do rendering, which effectively reduces complexity.  I’m not
aware that X3DJSAIL or X3DPSAIL have full matrix libraries in order to
reduce complexity, but there may be STL extensions that I am unaware of.

So it’s really a matter of figuring out what programming language you want
to use.

Other places to look for matrix transformations include Three.JS and pygfx.

Above all, in X3D, you can’t just “set a position” of a sphere without
using a transform, so reducing complexity is pretty hopeless unless you
convert to triangles.

John

On Tue, Feb 13, 2024 at 11:48 AM Konstantin Smirnov via x3d-public <
x3d-public at web3d.org> wrote:

> Thanks a lot
> I wanted to use some engine that solves linear programming connected with
> equations and scenes.
> Then reduces the complexity.
> At last I found some articles. They use matrix transformations. Also I use
> interval math engine.
> Good to see some new X3D versions at work.
>
> вт, 13 февр. 2024 г. в 20:06, Brutzman, Donald (Don) (CIV) <
> brutzman at nps.edu>:
>
>> Hi Konstantin, thanks for your question.
>>
>>
>>
>> May I suggest that offline creation or modification of X3D scenes is a
>> good way to proceed when the problem space is unconstrained.
>>
>>
>>
>> The following two libraries are reasonably mature and can be used with
>> other programs for generating X3D models.  They are designed to exactly
>> match the X3D Architecture with strongly typed node and field
>> relationships.  Strong typing for careful construction means that it is
>> relatively hard to produce an invalid model.  Careful authoring with useful
>> values remains a critical skill, of course.
>>
>>
>>
>>    - X3D Java Scene Access Interface Library (X3DJSAIL)
>>    - X3D Java Scene Access Interface Library (X3DJSAIL) supports
>>    programmers with standards-based X3D Java interfaces and objects, all as
>>    open source.
>>    - https://www.web3d.org/specifications/java/X3DJSAIL.html
>>
>>
>>
>>    - X3D Python Scene Access Interface Library (X3DPSAIL)
>>    - The x3d.py Python X3D Package supports programmers with Python
>>    interfaces and objects for standards-based X3D programming, all as open
>>    source.
>>    - https://www.web3d.org/x3d/stylesheets/python/python.html
>>    - https://pypi.org/project/x3d
>>
>>
>>
>> If further refinements are desired at run time, then the first step is
>> still to figure out what the basic scene structure might be.  Adding a
>> Script node with ECMAScript source can then produce further modifications
>> to the designed scene at run time, perhaps in response to user interaction.
>>
>>
>>
>> Good luck with your work.
>>
>>
>>
>> all the best, Don
>>
>> --
>>
>> Don Brutzman  Naval Postgraduate School, Code USW/Br
>> brutzman at nps.edu
>>
>> Watkins 270,  MOVES Institute, Monterey CA 93943-5000 USA
>> +1.831.656.2149
>>
>> X3D graphics, virtual worlds, navy robotics
>> https://faculty.nps.edu/brutzman
>>
>>
>>
>> *From:* x3d-public <x3d-public-bounces at web3d.org> *On Behalf Of *Konstantin
>> Smirnov via x3d-public
>> *Sent:* Tuesday, February 6, 2024 10:09 AM
>> *To:* X3D-Public <x3d-public at web3d.org>
>> *Cc:* Konstantin Smirnov <konstantin.e.smirnov at gmail.com>
>> *Subject:* [x3d-public] Linear programming
>>
>>
>>
>> If I want to include linear programming equations for scene optimizing,
>> computing, how their complexity can be reduced?
>>
>> Automated integrated script for solving linear programming combined with
>> scene plotting
>>
> _______________________________________________
> x3d-public mailing list
> x3d-public at web3d.org
> http://web3d.org/mailman/listinfo/x3d-public_web3d.org
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://web3d.org/pipermail/x3d-public_web3d.org/attachments/20240213/71f3613e/attachment-0001.html>