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

[Joe D Williams]

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 (mailto: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


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