[x3d-public] x3d-public Digest, Vol 138, Issue 19

Fri Sep 4 23:36:54 PDT 2020

https://doc.x3dom.org/tutorials/basics/hello/HelloX3DOM.html
Hello.
Thanks, Leonard.
Here is the page, but  without bgimage.

суббота, 5 сентября 2020 г. пользователь <x3d-public-request at web3d.org>
написал:
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> Today's Topics:
>
>    1. question on page use (Konstantin Smirnov)
>    2. Re: question on page use (Leonard Daly)
>    3. Re: Specification editors mantis issues, PointProperties
>       (Andreas Plesch)
>    4. Re: question on page use (J. Scheurritch)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Sat, 5 Sep 2020 00:09:25 +0300
> From: Konstantin Smirnov <konstantin.e.smirnov at gmail.com>
> To: x3d-public at web3d.org
> Subject: [x3d-public] question on page use
> Message-ID:
>         <CAD1qDjQa9koc1oG+8gQ4wE4M96JpOXY-ioD=
bLDicHkPWBLCnw at mail.gmail.com>
> Content-Type: text/plain; charset="utf-8"
>
> Hi.
> Can I use screenshots of web 3d example page for my projects?
> I mean my first x3dom page with three objects.
>
> Konstantin
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> Message: 2
> Date: Fri, 4 Sep 2020 17:56:37 -0700
> From: Leonard Daly <Leonard.Daly at realism.com>
> To: x3d-public at web3d.org
> Subject: Re: [x3d-public] question on page use
> Message-ID: <3064a13e-ec9c-749b-9acd-9fcd9d93705b at realism.com>
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>
> Hi Konstantin,
>
> Thank you for asking.
>
> Please see the copyright notice usually at the bottom of the page. If
> the associated license is blank or states "All rights reserved", please
> send a message using the contact form with the URLs of the pages in
> question identifying the specific region of the page you wish to use.
>
> If the license allows reuse (e.g., Creative Commons, CC-BY, etc.), then
> reuse is allowed when you follow the license. The reference is either
> explicitly listed at the bottom of the page(s) in question, or if not
> stated:
>
> (c) 2020, Web3D Consortium. Licensed as <whatever it was stated>. <URL
> to page>
>
>
> If the explanation above doesn't answer your question, please feel free
> to reply here and include the URL of the page(s) in question.
>
> Leonard Daly
> Webmaster, Web3D Consortium
>
>
>
>> Hi.
>> Can I use screenshots of web 3d example page for my projects?
>> I mean my first x3dom page with three objects.
>>
>> Konstantin
>>
>> _______________________________________________
>> x3d-public mailing list
>> x3d-public at web3d.org
>> http://web3d.org/mailman/listinfo/x3d-public_web3d.org
>
>
> --
> *Leonard Daly*
> 3D Systems & Cloud Consultant
> LA ACM SIGGRAPH Past Chair
> President, Daly Realism - /Creating the Future/
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> ------------------------------
>
> Message: 3
> Date: Fri, 4 Sep 2020 21:16:07 -0400
> From: Andreas Plesch <andreasplesch at gmail.com>
> To: X3D Graphics public mailing list <x3d-public at web3d.org>
> Subject: Re: [x3d-public] Specification editors mantis issues,
>         PointProperties
> Message-ID:
>         <
CAKdk67uWaZSCb5NG0HFyn3EL9m6bBD_ZzEVX4GWr7OTDDSn00w at mail.gmail.com>
> Content-Type: text/plain; charset="UTF-8"
>
> Working next on sprite texturing for PointProperties, I found it
> pretty straightforward to start to support textures of any kind since
> the shader or shader generation needs to deal with those already. The
> only difference to other geometry is to use gl_PointCoord as tex.
> coord, rather than provided tex. coords. This is a simple
> intensity-alpha 3x3 PixelTexture mixed with the Material color:
>
>
https://raw.githack.com/andreasplesch/x3dom/PointSetNormals/test/regression-suite/test/cases/points/pointset_archie_normal.html
>
> CSS or PBR textures with normal and other nice maps should also work,
> for example.
>
> It looks like it is time to test a bit more and then merge with the
> x3dom dev. branch.
>
> Here is another test with 1.5 million points, adopted from
> http://metagrid2.sv.vt.edu/~yansh93/catawba_blinn.html
>
>
https://raw.githack.com/andreasplesch/x3dom/PointSetNormals/test/regression-suite/test/cases/points/catawba50.html
>
> Lidar surveys easily generate large point clouds like this. The
> PointSet is actually much subsampled. I also discovered that the
> original binary data has some interesting tail which may or may not be
> junk from processing.
>
> It was difficult to generate and deal with a very large xml file, so I
> had to put the data in separate files and load via js. The final scene
> is still xml (actually DOM) in memory, generated with a few lines of
> js DOM manipulation.
>
> x3dom has BufferGeometry for binary geometry data (used for glTF)
> which becomes really necessary for these kind of datasets. As far as I
> remember x3dv4 will not have an equivalent. Maybe I should check how
> hard it would be to support PointProperties for BufferGeometry (which
> can be points).
>
> The test shows that vertex colors also work with shading and
> PointProperties, after mixing in a white diffuseColor. I think this is
> as expected since vertex colors used to be emissive. Actually, I am
> changing my mind. I think vertex colors should be treated as diffuse
> color (or base color for PBR) if normals are present. Let's see how
> this looks in the shader generation for x3dom.
>
> -Andreas
>
>
>
>
>
>
>
>
>
> Andreas
>
> On Thu, Sep 3, 2020 at 6:06 PM Andreas Plesch <andreasplesch at gmail.com>
wrote:
>>
>> Since both x_ite and
>>
>> http://metagrid2.sv.vt.edu/~yansh93/archimedes_pp_normal.html
>>
>> use circles for point rendering, this x3dom draft implementation now
>> also uses circles:
>>
>>
https://raw.githack.com/andreasplesch/x3dom/PointSetNormals/test/regression-suite/test/cases/points/pointset_archie_normal.html
>>
>> Circles are only used for untextured points. For textured points, eg.
>> sprites, the masking for circles will be omitted.
>>
>> Should the spec. require circles for untextured points ? They look
>> better but perhaps such a requirement is too opinionated.
>>
>> -Andreas
>>
>> On Thu, Sep 3, 2020 at 4:33 PM Andreas Plesch <andreasplesch at gmail.com>
wrote:
>> >
>> > I updated the implementation and the scene to reflect the latest
>> > changes in the spec. draft:
>> >
>> >
https://raw.githack.com/andreasplesch/x3dom/PointSetNormals/test/regression-suite/test/cases/points/pointset_archie_normal.html
>> >
>> > There are no visual differences.
>> >
>> > -Andreas
>> >
>> > On Thu, Sep 3, 2020 at 4:08 PM Andreas Plesch <andreasplesch at gmail.com>
wrote:
>> > >
>> > > I had some time to refocus on PointProperties and found this note on
>> > > spec. changes:
>> > >
>> > > > Date: Mon, 31 Aug 2020 10:33:40 -0700
>> > > > From: Don Brutzman <brutzman at nps.edu>
>> > > > To: Michalis Kamburelis <michalis.kambi at gmail.com>,
>> > > >         "puk at igraphics.com" <puk at igraphics.com>
>> > > > Cc: X3D Graphics public mailing list <x3d-public at web3d.org>
>> > > > Subject: Re: [x3d-public] Specification editors mantis issues: PBR
>> > > >         review
>> > > > ..
>> > > > On 8/24/2020 12:48 PM, Michalis Kamburelis wrote:
>> > > > >
>> > > > > [...]
>> > > > > Answers are inline below.
>> > > > >
>> > > > > Don Brutzman <brutzman at nps.edu <mailto:brutzman at nps.edu>> wrote:
>> > > > >
>> > > > >     ---
>> > > > >     2. Spec questions.
>> > > > >
>> > > > >     a. see new inquiries today regarding PointProperties from
Andreas and Holger.? Let's continue/contribute on that thread please.
>> > > > >
>> > > > > I do not see input from Holger in the PointProperties thread. If
there's some communication off-list, maybe because someone forgot to use
"Reply All", please resend it to the mailing list :)
>> > > >
>> > > > Separate thread found at
>> > > >
>> > > > [1] [x3d-public] PointProperties revisited
>> > > >
https://web3d.org/pipermail/x3d-public_web3d.org/2020-August/013447.html
>> > > >
>> > > > We agreed to remove 'colorMode' and updated both spec & Mantis
1252.
>> > > >
>> > > > We replaced final 2 paragraphs in 11.4.11 PointSet with
>> > > >
>> > > > "If the normal field of the PointSet node contains normal vectors,
then points are rendered using the same lighting equations as the other
geometry and can be lit. If the normal vectors are not provided, the points
are rendered following the "unlit" lighting equations. If the PointSet is
used with the Material node, and the normal vectors of points are not
provided, the points shall be rendered as unlit, using the emissiveColor
field of the Material node. In both cases, the points look can be
customized using textures, Color, ColorRGBA, and UnlitMaterial nodes."
>> > >
>> > > That sounds great, and should cover all situations.
>> > >
>> > > I developed a first implementation of PointProperties with normals,
>> > > ignoring textures for now:
>> > >
>> > >
https://raw.githack.com/andreasplesch/x3dom/PointSetNormals/test/regression-suite/test/cases/points/pointset_archie_normal.html
>> > >
>> > > This is the archie example modified to use a diffuseColor material
for
>> > > shading with normals, and a non-default attenuation factor of "1 1
0",
>> > > eg. with a linear distance dependence.
>> > >
>> > > The point size attenuation looks similar to how x_ite is scaling
>> > > (x_ite ignores the normals currently), so that is good sign. Here is
>> > > the x3d xml version:
>> > >
>> > >
https://raw.githubusercontent.com/andreasplesch/x3dom/PointSetNormals/test/regression-suite/test/cases/points/pointset_archie_normal.x3d
>> > >
>> > > freeWrl 4.7 does not seem to do the size attenuation with distance,
>> > > not sure if it is not implemented or another interpretation.
>> > >
>> > > Oh, I see that this draft
>> > >
>> > >
https://www.web3d.org/specifications/X3Dv4Draft/ISO-IEC19775-1v4-WD2/Part01/components/shape.html#PointProperties
>> > >
>> > > changed the attenuation field from MFFloat to SFVec3f, and the name
>> > > from pointSizeAttenuation to just attenuation. Should be a quick fix.
>> > >
>> > > In the same spirit, I would also suggest renaming "pointSizeMinValue"
>> > > to "pointSizeMin" or just "sizeMin" (we are in _Point_Properties,
>> > > after all), and "pointSizeMaxValue" accordingly.
>> > >
>> > > -Andreas
>> > >
>> > > --
>> > > Andreas Plesch
>> > > Waltham, MA 02453
>> >
>> >
>> >
>> > --
>> > Andreas Plesch
>> > Waltham, MA 02453
>>
>>
>>
>> --
>> Andreas Plesch
>> Waltham, MA 02453
>
>
>
> --
> Andreas Plesch
> Waltham, MA 02453
>
>
>
> ------------------------------
>
> Message: 4
> Date: Sat, 5 Sep 2020 03:30:14 +0200
> From: "J. Scheurritch" <mufti11 at web.de>
> To: x3d-public at web3d.org
> Subject: Re: [x3d-public] question on page use
> Message-ID: <b1670278-d4ff-60be-eb73-fece8ed27551 at web.de>
> Content-Type: text/plain; charset=utf-8
>
>
>> Please see the copyright notice usually at the bottom of the page.
>
> Often, the coyight information is in the WorldINFO node, like here
>
>
https://www.web3d.org/x3d/content/examples/Basic/HumanoidAnimation/NancyPrototypesIndex.html
>
> so long
> MUFTI
>
>
>
>
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