[x3d-public] 3D graphics, vertex attributes Tangent index and vector

[John Carlson]

I’d ask Holger, cc’d

I’ve not used Tangent, myself.

X_ITE Supports up to Level 4, so I guess you’re proposing a new level 5 for
the Geometry 3D component?

Look at X_ITE IFS:



Maybe check Holger’s create3000 Library for examples?

To retrieve examples, last time I tried:

git clone https://github.com/create3000/Library

Online at:

https://github.com/create3000/Library

Let’s get v2 Joe Kick out the door, check v2 finger joints, and make sure
all joints have converted to v2.

John

On Wed, May 14, 2025 at 10:45 PM Joe D Williams <joedwil at earthlink.net>
wrote:

>
>
> Main questions, in IFS Level5:
>
> Is a default tangent generated if Tangent point="" field empty?
>
> tangentPerVertex? assigned to vertex or face?
>
> tangentIndex? If no tangentIndex is coordIndex used?
>
>
>
> Thanks,
>
> Joe
>
>
>
>
>
>
>
>
>
> -----Original Message-----
> From: John Carlson <yottzumm at gmail.com>
> Sent: May 14, 2025 3:00 PM
> To: Extensible 3D (X3D) Graphics public discussion <x3d-public at web3d.org>
> Cc: Joe D Williams <joedwil at earthlink.net>
> Subject: Re: [x3d-public] 3D graphics, vertex attributes
>
>
> Joe,
>
> X_ITE has a tangent node:
>
> Tangent | X_ITE X3D Browser
> <https://create3000.github.io/x_ite/components/rendering/tangent/>
>
> Enjoy!
>
> John
>
> On Wed, May 14, 2025 at 4:46 PM Joe D Williams via x3d-public <
> x3d-public at web3d.org> wrote:
>
>> From this:
>>
>>
>> https://docs.google.com/document/d/1hCetnGIkut_dyt4mwkDSTNiLTbrVg1jLo_EArE74DRg/edit?tab=t.0
>>
>>
>> In 3D graphics, vertex attributes define per-vertex data necessary
>> for rendering, animation, shading, and so on.
>> These attributes include geometric properties such as
>> position, normal, tangents, texture mapping information (UV coordinates),
>> shading data (vertex colors), and
>> deformation information (skinning weights and blend shapes).
>>
>>
>> In this discussion of vertex attributes, the only one I don't recall
>> seeing in X3D is tangent?
>>
>> Associated with this work:
>>
>> https://docs.google.com/spreadsheets/d/18d1qy4jx-d_kLsam-JQAzig23w7dTau0Moe7M32lVvk/edit?gid=0#gid=0
>>
>>
>> Thanks,
>> Joe
>>
>>
>> _______________________________________________
>> x3d-public mailing list
>> x3d-public at web3d.org
>> http://web3d.org/mailman/listinfo/x3d-public_web3d.org
>
>
>
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