[X3D-Ecosystem] Can I release mobius.x3d to sourceforge.net?

[John Carlson]

Excellent points, Holger.  Note that dumb Americans don’t know how to type
an umlaut on their keyboards.  Perhaps Moebius is better?  Googling would
work of course!

Thanks,

John
On Sat, Aug 2, 2025 at 9:54 AM Holger Seelig via X3D-Ecosystem <
x3d-ecosystem at web3d.org> wrote:

> Sorry, but this is not a Möbius strip (denote the point above the o),
> because the rotation of the strip (crossSection) is 360 degrees, but there
> should only be a rotation about 180 degrees.
>
> The orientation field of the Extrusion node should better hold these
> values:
>
> 0 1 0 0,
> 0 1 0 0.130899693899575,
> 0 1 0 0.261799387799149,
> 0 1 0 0.392699081698724,
> 0 1 0 0.523598775598299,
> 0 1 0 0.654498469497874,
> 0 1 0 0.785398163397448,
> 0 1 0 0.916297857297023,
> 0 1 0 1.0471975511966,
> 0 1 0 1.17809724509617,
> 0 1 0 1.30899693899575,
> 0 1 0 1.43989663289532,
> 0 1 0 1.5707963267949,
> 0 1 0 1.70169602069447,
> 0 1 0 1.83259571459405,
> 0 1 0 1.96349540849362,
> 0 1 0 2.0943951023932,
> 0 1 0 2.22529479629277,
> 0 1 0 2.35619449019235,
> 0 1 0 2.48709418409192,
> 0 1 0 2.61799387799149,
> 0 1 0 2.74889357189107,
> 0 1 0 2.87979326579064,
> 0 1 0 3.01069295969022,
> 0 1 0 3.14159265358979
>
> Follow a plane or a edge of the strip and you will see that now it has
> only one of them.
>
> Here is a direct comparison of both of the strips:
>
> https://create3000.github.io/x_ite/playground/?url=https://create3000.github.io/Library/Tests/Components/Extrusion/M%C3%B6bius.x3d
>
> Please also have a look at the Wikipedia page:
> https://en.wikipedia.org/wiki/M%C3%B6bius_strip
>
> Best regards,
> Holger
>
> —
> Holger Seelig
> holger.seelig at yahoo.de
>
>
> Am 01.08.2025 um 20:15 schrieb Don Brutzman via X3D-Ecosystem <
> x3d-ecosystem at web3d.org>:
>
> Online, open source, in version control at SourceForge:
>
>    - X3D Example Archives: X3D4AM, X3D for Advanced Modeling, Geometric
>    Shapes, Mobius Extrusion
>    - Mobius (or Mobius) is a surface with only one side and only one
>    boundary component.
>    -
>    https://www.web3d.org/x3d/content/X3dForAdvancedModeling/GeometricShapes/MobiusExtrusionIndex.html
>
> Vince, didn't that get derived from something you originally did?
> Apologies if further provenance information is needed, if so then please
> advise and let's add it.
>
> all the best, Don
>
> On Fri, Aug 1, 2025 at 5:35 AM Vincent Marchetti via X3D-Ecosystem <
> x3d-ecosystem at web3d.org> wrote:
>
>> John
>>
>> Yes, you can use the file for a ticket submission
>>
>> Vince Marchetti
>>
>>
>> > On Aug 1, 2025, at 7:55 AM, John Carlson via X3D-Ecosystem <
>> x3d-ecosystem at web3d.org> wrote:
>> >
>> > Vince,
>> >
>> > Can I release mobius.x3d to the x3d tickets on sourceforge?  I sent you
>> email, probably too early!
>> >
>> > I’d like to get X3dToJson.xslt fixed, and stuff added to the X3DJSAIL
>> DOM loader.  Apparently, LineSets and NurbsPatchSurface need to be listed
>> in a humoungous set of if then else if statements as children of Shape.  I
>> don’t know why they aren’t in dispatch table(s), probably the branch
>> prediction on the CPU is wild.  Maybe Java’s Jackson APIs could supplant it.
>> >
>> > Here are a few of my type and method lookup tables.  They aren’t
>> perfect!
>> >
>> > Michalis, could I use these for data driving the JSON to X3DNode thing
>> in Pascal?  At least a first cut?
>> >
>> >
>> https://github.com/coderextreme/X3DJSONLD/blob/master/src/main/node/fieldTypes.js
>> >
>> >
>> https://github.com/coderextreme/X3DJSONLD/blob/master/src/main/node/mapToMethod.js
>> >
>> >
>> >
>> https://github.com/coderextreme/X3DJSONLD/blob/master/src/main/node/mapToMethod2.js
>> >
>> > Overrides the former.
>> >
>> >
>> > Thanks,
>> >
>> > John
>> > --
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>>
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