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

[John Carlson]

Note, it’s Tangent vector=… not Tangent point=…

John

On Thu, May 15, 2025 at 12:38 AM John Carlson <yottzumm at gmail.com> wrote:

> 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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