[x3d-public] Mutable scenegraphs

John Carlson yottzumm at gmail.com
Sat Jul 31 16:27:48 PDT 2021

I forgot the term for the Minecraft idea where the whole world is mutable.
  Or the idea that you can crush everything in a virtual world.

How this would apply to X3D seems rather impossible.   Has anyone done
extensive mutability with X3D?   Generic particle systems?

Yes, I’ve seen the “smooth” Minecraft-like demos.

I understand structural and behavioral, but is there a third choice?   How
might we create a structural+behavioral scenegraph without switching
languages?   Interpolation?   Particle systems?   XSLT?  Dart?

Are encodings like XML+XSLT, JSON+XSLT and VRML+??? even adequate?   Will
do some searching.



On Sat, Jul 31, 2021 at 5:11 PM John Carlson <yottzumm at gmail.com> wrote:

> I am wondering if the goal of immutable instances is desired or even
> feasible in X3D.
> As a small example, I might want to change the color of something.   A
> larger example might be animating a mesh.   I understand that you don’t
> want to regenerate the mesh each time you move it, as this would require
> twice the memory.   However I can see that changing coordinates or normals
> might be desired.
> Does immutability really have a place in an animated system?
> I remember my first sorting algorithm I ever wrote i used two data
> structures, one for initial data, and one for the result.  Seemed
> reasonable to me, but my teacher said no.
> Thanks!
> John
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