[x3d-public] Visualizing Math in X3D

[John Carlson]

Don, I am just trying to make the standard better for visualizing
mathematical stuff,   I pretty much majored in mathematical visualization
in college.   There’s a lot of stuff in the standard for visualizing
physics, both rigid body and particle systems.   Instead of applying math
to physics, I am trying to apply physics to math.

I realize that visualizing math does not really have a vocal champion in
the X3D community, perhaps Andy Yeh is still around.

I imagine because Mathematica made great strides in the math community.

Mathematica still requires a Pro edition running on the cloud to even
attempt my surfaces.   In X3D, they pop right up, even multiple
“transparent” animated objects. Yay X3D!

PlayCanvas has a *very* slow start up compared to X3D.

I would like to continue using X3D over PlayCanvas and others.  The key
remains don’t use the network for mesh, positions, or normals, generate
them on the web client.   My knowledge of geometry shaders indicates I
still need to compute a grid on a sphere, and the geometry shader can
enhance that.

That is why I am seeking to have the browser generate the mesh for at least
one topology, let’s call it a sphere, but it’s the topology of the equation
that matters.   I can already position and compute normals of the
surfaces.  I could probably compute a mesh as sphere topology in an
initialize method if that’s still allowed.  I am not sure about X_ITE.   I
do not want to generate coordinates in X3D nodes.   Shaders are fine for
that.   I am not sure I can confidently generate a mesh without defects.

Low bandwidth (think 4G LTE) is preferred.

But you can see my Frustration compared to Mathematica users who just type
in a small set of equations.  Not my lucky day.

I do not want geometry or perfect math in X3D.   I want a topological
0-hole enclosed surface, subdivided to adequate resolution.

I will look further into primitive quality.

I will see if my graphics card supports raytracing.

John

On Sun, Jun 7, 2020 at 1:37 AM John Carlson <yottzumm at gmail.com> wrote:

> Here’s the best looking version of what I like to do:
>
> https://playcanv.as/p/wQgQBgkE/
>
> Ideally, I could send a math equation in MathML by putting MathML into the
> geometry node, and PBR or material like glass or diamond
>
>
> On Sun, Jun 7, 2020 at 1:22 AM John Carlson <yottzumm at gmail.com> wrote:
>
>> Previous subject:  morphing comparison in X3D and glTF:
>>
>>
>> http://web3d.org/pipermail/x3d-public_web3d.org/2017-December/008037.html
>>
>> I would say morphing is doable in X3DOM, but perhaps not other browsers.
>>   The most conformant approach would probably be an IFS where the position
>> and normal are computed in a shader and the mesh is computed in user code,
>> or provided statically.
>>
>> My question becomes,  Why can’t we provide at least provide for common
>> topologies?  1 surface and 0 edges (sphere), 2 surface (cone), 3 surface
>> (cylinder), 1 surface and one hole(torus), and consider a higher number of
>> holes and surfaces.   I think we have a isocahedron at least...but very
>> slow to open.
>>
>> It seems like I should be using blender to create X3D.
>>
>> John
>>
>> On Sun, Jun 7, 2020 at 12:33 AM John Carlson <yottzumm at gmail.com> wrote:
>>
>>> What people don’t understand is I’m moving every vertex in the mesh with
>>> respect to the mesh.   Kind of like particle physics or morphing would be a
>>> better description.   I have example videos.
>>>
>>> John
>>>
>>> On Sat, Jun 6, 2020 at 11:01 PM J. Scheurich <mufti11 at web.de> wrote:
>>>
>>>>
>>>> > 1.  User provides a mesh. I have done this before.  It is too slow for
>>>> > a 100x100 IFS (20000 polygons I think).
>>>> It depend on your graphics card and driver.
>>>> For the rasberry PI and some other systems i meshured the performace in
>>>> 3000 Polygon-Steps
>>>> (1 NURBS-Object with uv/Tessellation 0)
>>>>
>>>> https://wdune.ourproject.org/docs/usage_docs/white_dune_rasberry_pi.odp
>>>>
>>>> (in german but page 5 is a readable table).
>>>> A raspberry PI (shared Memory graphics card) can do 30000 polygons, a
>>>> Intel HD 3000 shared
>>>> memory graphics card (this is a common card on older "office"-laptops)
>>>> can do 33000 polygons.
>>>> There are very much faster graphic cards on "game laptops"....
>>>> The fastest graphics card on this list is a very slow (processor)
>>>> Mac-book....
>>>>
>>>> The only systems that are not able to do 20000 polygons are a 8 year old
>>>> netbook and a
>>>> ARM chromebook without a 3D driver.
>>>>
>>>> so long
>>>> MUFTI
>>>>
>>>> _______________________________________________
>>>> x3d-public mailing list
>>>> x3d-public at web3d.org
>>>> http://web3d.org/mailman/listinfo/x3d-public_web3d.org
>>>>
>>>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://web3d.org/pipermail/x3d-public_web3d.org/attachments/20200607/7fb38f46/attachment-0001.html>