[x3d-public] Super simple animations?

Sun Aug 6 18:11:25 PDT 2023

you don't need script. Look at the stuff and quit worrying.Learn this and then figure a better way. 

-----Original Message-----
From: John Carlson <yottzumm at gmail.com>
Sent: Aug 6, 2023 6:04 PM
To: Brutzman, Donald (Don) (CIV) <brutzman at nps.edu>, Joe D Williams <joedwil at earthlink.net>, Michalis Kamburelis <michalis.kambi at gmail.com>
Cc: GPU Group <gpugroup at gmail.com>, X3D Graphics public mailing list <x3d-public at web3d.org>
Subject: Re: [x3d-public] Super simple animations?

We can’t use (Java)Script nodes on view3dscene, so that doesn’t work.

I’m getting ready to start with interpolators, but  I’m thinking two lines of code will turn into 50 or more.

So yes, expressible, but extremely painful.

Did you hear my screams of agony yet?

Recommended tools for exporting animations that’s open source?

I’m not really a drag and drop guy, I like mathematical formulas.

Is there some way to do this that uses the DRY principle?

Can you suggest a good name for a prototype?

John

On Sun, Aug 6, 2023 at 6:27 PM Brutzman, Donald (Don) (CIV) <brutzman at nps.edu (mailto:brutzman at nps.edu)> wrote:

  *   John, i know of no event animation chain for X3D that cannot be expressed using X3D4 ROUTE connections using interpolators, sequencers, and event utility nodes. Chasers, dampers, and Script node provides further capabilities for variation. X3D4 architecture appears to have full expressive power for animation.
If you want to adapt things in a different way, repeatably, then great - please write a prototype. The X in X3D is Extensible. 

Of course Script nodes, and programming libraries like X3DJSONLD, X3DJSAIL, x3d.py and others, are both declarative and imperative simultaneously when manipulating the scene graph. 

  *   Doug, we have had great success mapping Web Audio API to X3D4.  I think we have a similar path forward to X3D4.1 for MIDI.
  *  W3C Web MIDI API, draft
  *  https://webaudio.github.io/web-midi-api/

Once again, X3D prototypes and Script node can provide a useful path forward for design, implementation, and evaluation of new nodes.  Usage of stable prototypes can encourage significant usage and deployment.

Given that Web3D Consortium has a formal liaison partnership with W3C, designated Web3D members can further participate in Audio Working Group to share design considerations and suggest refinements in the draft W3C MIDI API. Membership has value!

v/r Don

From: x3d-public <x3d-public-bounces at web3d.org (mailto:x3d-public-bounces at web3d.org)> on behalf of GPU Group <gpugroup at gmail.com (mailto:gpugroup at gmail.com)>
Sent: Sunday, August 6, 2023 10:25
To: X3D Graphics public mailing list <x3d-public at web3d.org (mailto:x3d-public at web3d.org)>

Subject: Re: [x3d-public] Super simple animations? 

MIDI nodes are a bit like that - you can design the event sequence / timing in a MIDI authoring tool, then play the .mid file and route from ToneSplitter. I'm thinking about a fireworks scene combining particle physics and midi event sequencing. Perhaps we need something more general, as a utility node set.-Doug

On Sun, Aug 6, 2023 at 11:14 AM John Carlson <yottzumm at gmail.com (mailto:yottzumm at gmail.com)> wrote:
Conceptually one could do this with a switch, but i don’t know about events from the switch to enable the child TimeSensor or the startTime.

If you tell me to do use a Script, why not put imperative code in an encoding instead?

John 

On Sun, Aug 6, 2023 at 11:17 AM John Carlson <yottzumm at gmail.com (mailto:yottzumm at gmail.com)> wrote:
I would like something like a TimeSensorSequencerGroup that enables and disables children TimeSensors in order of appearance in the code, if such a thing exists.  No need to fiddle with TimeSensor fields, the SequencerGroup does it for you. 
I know this is imperative programming, and not declarative, but sometimes, you’ve got to bite the bullet of simplicity.

Thanks!

John

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