[x3d-public] Sphere subdivision in to X3DV4 standard

[John Carlson]

No one's changing the radius in X3D.  I'm warping the sphere mesh in a
vertex shader based on other parameters passed to the shader.

If this is "not allowed,"  I will kindly say "go ____ yourselves" to the
Web3D consortium.  Money and effort spent better elsewhere (on PlayCanvas).

Of course, I understand most of this is possible with an IndexedFaceSet.
It just seems extremely slow compared to my current solution (I've tried
IFS).

If you've missed the revolution in computer graphics dawdling over
web/VR/AR/XR, search for "real-time ray tracing" or check out the
PlayStation5 and Unreal 5 demos.

I'm not changing the subdivision or radius field in X3DOM, to make that
clear.  I have no desire to do that.  I just need a good mesh to pass the
shader.  Is that so hard to grant?  One that is fully connected (no edges)
is particularly useful.

John

On Sat, May 30, 2020 at 9:33 PM Joseph D Williams <joedwil at earthlink.net>
wrote:

>
>    - … during models lifetime
>
>
>
> So much is true, please notice the access type of the field.
>
> If it is initialize only, then it is set when the node is initialized or
> replaced.
>
> This has been used as a clue that the browser has to completely redraw the
> node if the field is changed.
>
> Of course the sphere’s shape can be altered by xyz scaling in the parent
> transform so you can change the shape to most anything without a hole but
> not the initialized radius in parent space or the number of points in the
> shape without redrawing it.
>
> Thanks,
>
> Joe
>
>
>
>
>
> *From: *John Carlson <yottzumm at gmail.com>
> *Sent: *Saturday, May 30, 2020 3:47 PM
> *To: *J. Scheurich <mufti11 at web.de>
> *Cc: *X3D Graphics public mailing list <x3d-public at web3d.org>
> *Subject: *Re: [x3d-public] Sphere subdivision in to X3DV4 standard
>
>
>
> Surely you can apply transforms such that the radius changes?
>
>
>
> But according to the X3D standards, a sphere may not change its single
> parameter (radius)
> during models lifetime.
>
>
>
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